Site log - Houston (August 1999)

Flags:

1-Satellite coincidence data
2-Scan in TSDIS data
A-Major problem (moderate to strong AP > 25 dBZ &/or widespread coverage > 10%)
B-Minor problem (weak AP &/or very litte coverage)

*******************************************************************************

01 Aug 99:  A few scattered convective cells over the Gulf from 09-15Z.
            Some additional isolated small cells form after 18Z along
            the coast.  A possible smoke plume from 1930-23Z w/in 100 km
            to the ENE.

            Data processed: 0001-2352Z  

            Sat. Coincidence: 0313Z(294 km), 0449Z(436 km), 0626Z(620 km),
                              0803Z(221 km), 0939Z(682 km)

            QC notes:  0220-0727Z: CAE specks. 
                             ----> Corrected.

                       0807Z, 0826Z-0837Z:  CAE specks.
                             ----> Corrected. 

                       1026-1155Z: Small shower removed by defaults. 
                             ----> Corrected. 

                       1503-1548Z: Small shower removed by defaults.
                             ----> Corrected. 

                       1930-2039Z, 2111Z: Smoke-like echo to ENE.  
       2A, 2B  !!FLAG!!      ----> Cannot be removed w/o affecting precip. 

                                     
                                  
            % of data reprocessed:  55/193 = 28% 

**************************************************************************

 
02 Aug 99:  Convection fires up over Gulf after 11Z, then dissipates
            by 18Z.  Scattered convection over land after 19Z.
 
            Data processed: 0002-2348Z
 
            Sat. Coincidence: 0336Z(177 km), 0513Z(611 km), 0650Z(465 km),
                              0826Z(232 km)
 
            QC notes:  0223-0946Z: CAE, often widespread and moderate
                                   intensity Also some pockets of intense
                                   AP.
                             ----> Corrected.

                       0956-1106Z: CAE + precip over Gulf.
                             ----> Corrected. 

                       1258-1314Z: AP to SW?
                             ----> Mostly corrected...may be a light
                                   clutter speck at 1309Z
        2B  !!FLAG!!         ====> 1309Z:  possible clutter speck not
                                   removed, but very minor problem.        
 
 
            % of data reprocessed:  60/225 = 27%
 
**************************************************************************  
  
03 Aug 99:  Scattered convection in NW sector very early. Some isolated
            convection from 08-16Z.  Scattered convection forms in N
            half of scope after 19Z.  Nice outflow boundary moving south
            acts as focal point for much of the convection.
 
            Data processed: 0003-2359Z
 
            Sat. Coincidence: 0224Z(177 km), 0400Z(491 km), 0537Z(601 km),
                              0714Z(132 km)
 
            QC notes:  0224-0330Z: CAE & AP.  No precip w/in 150 km.
                             ----> Corrected.
                             
                       0335-0420Z: CAE & AP + precip to NE.
       1B !!FLAG!!           ----> Corrected to W, but still may
                                   be some stubborn AP to NE near
                                   150 km.  Minor problem since 
                                   it's so light.
                             
                       0425-0902Z: CAE &/or AP. No precip w/in 150 km.
                             ----> Corrected.
                             
                       0912-0922Z: CAE + small shower to SSW.
                             ----> Corrected.
                             
                       0932-0942Z: Same as previous period.
                             ----> Corrected.
                             
                       0952-0957Z: Same as previous period.
                             ----> Corrected.
                             
                            1036Z: CAE to NW, precip to E.
                             ----> Corrected.
                             
                       1221-1334Z: CAE + showers.
                             ----> Corrected.
                             
                       1349-1413Z: CAE + convective cells over Gulf.
                             ----> Corrected.
                       
            % of data reprocessed:  107/286 = 37%
 
**************************************************************************  
 
04 Aug 99:  Scattered convection along outflow boundary continues sliding
            to SW through 02Z, then weakens rapidly.  Only a few small
            showers/convective cells w/in 150 km near mid and late day. 
 
            Data processed: 0004-2356Z
                            
 
            Sat. Coincidence: 0112Z(610 km), 0248Z(264 km), 0425Z(626 km),
                              0602Z(403 km), 0738Z(358 km)
 
            QC notes:  0024-0100Z: Moderate to intense AP in NE sector. 
       1A, 2A !!FLAG!!       ----> Embedded AP cannot be removed.
                             
                       0105-0110Z: AP in NE sector (mostly embedded in
                                   precip), but also precip near radar
                                   removed by default parameters.
       1A  !!FLAG!!          ----> Intense, embedded AP remains.

                       0115-0135Z: Precip near radar removed by default
                                   parameters.
       1A  !!FLAG!!          ----> Most precip restored, but embedded
                                   small clutter specks not removed.
                                   
                       0140-0155Z: Clutter specks near radar.
       1A, 2A !!FLAG!!       ----> Embedded in precip. Cannot be removed.
        
                       0200-0356Z: CAE & AP + precip + clutter specks.
                             ----> Some improvements made, but following
                                   VOSs are flagged:
       1A  !!FLAG!!          ====> 0200-0205Z:  Embedded clutter specks.
       1B, 2B !!FLAG!!       ====> 0210-0306Z:  CAE on fringes of precip.
                                   Also some independent CAE specks that 
                                   remain. Further param manipulation 
                                   reduces precip. 
       2B !!FLAG!!           ====> 0326-0356Z: CAE remains.                      
                       
                       0401-1022Z: CAE & AP & clutter specks.  Doesn't 
                                   appear to be any precip.
                             ----> Corrected.
                      
                       1042-1052Z, 1122Z: Light spurious echo specks. 
                             ----> Corrected.
      
                       1152-1443Z, 1528Z:  Precip + some light spurious 
                                   echo specks.
       2B !!FLAG!!           ----> Mostly corrected, but perhaps a few specks
                            

                       1638Z, 1648-1653Z, 1718Z, 1759Z, 1834Z, 1849Z,
                       1914Z: Light spurious echo specks.
                             ----> Corrected.
 
                       1930-2011Z, 2020Z, 2033-2043Z, 2058-2103Z, 2113-2118Z,
                       2149Z, 2214Z, 2309Z: CAE specks + small precip cells.
                             ----> Perhaps a few CAE specks left, but very
                                   minor problem.
                       
 
            % of data reprocessed:  144/231 = 62%
 
**************************************************************************  

 
05 Aug 99:  A few lone showers after 20Z. 
 
            Data processed: 0001-2357Z
 
            Sat. Coincidence: 0136Z(61 km), 0312Z(539 km), 0449Z(572 km),
                              0626Z(32 km)
 
            QC notes:  0057-0109Z: Small, light speck to E. 
                             ----> Corrected.

                       0129-0134Z: Same as previous period.
                             ----> Corrected. 
 
                       0223-1352Z: CAE and AP, sometimes moderate to intense
                                   and widespread.  No obvious embedded 
                                   precip, though. 
                             ----> Corrected. 

                       1411-1438Z: Light spurious echo remnants.
                             ----> Corrected. 

                       1647Z, 1936Z: Same as previous period.
                             ----> Corrected. 
 
                       2216Z & 2226Z: Small speck SSW of radar + cell to SW.
                             ----> Corrected. 
          
                       2246-2256Z: Same as previous period.
                             ----> Corrected. 
 
            % of data reprocessed:  83/169 = 49%
 
**************************************************************************  

 
06 Aug 99:  Widespread AP and clear air echo through 14Z.  Scattered
            convection forms after 17Z and remains through 2355Z. 
            Some intense disorganized convection forms.
 
            Data processed: 0002-2355Z
 
            Sat. Coincidence: 0023Z(474 km), 0200Z(342 km), 0336Z(630 km),
                              0513Z(334 km), 0649Z(489 km)
 
            QC notes:  0037-0047Z: Light to instense AP remnants to W.
                             ----> Corrected.

                       0251-1346Z: Mixture of CAE and AP, sometimes 
                                   widespread.
                             ----> Corrected.  

                       2204-2250Z: AP to NE behind gust front.
      2B !!FLAG!!            ----> Some embedded AP remains from 2204-
                                   2235Z, but it's not very obvious
                                   or intense.  Major area of AP 
                                   removed. 
 
            % of data reprocessed:  70/184 = 38%
 
**************************************************************************  

 
07 Aug 99:  Isolated convective cells through 02Z, then again from 12-2359Z.
            TRMM overpass near 0047Z captures a few isolated cells.
 
            Data processed: 0001-2359Z
 
            Sat. Coincidence: 0047Z(43 km), 0224Z(575 km), 0400Z(534 km), 
                              0537Z(72 km), 2334Z(347 km)

            OVERPASS CASE:  Orbit: 9732, Time: 0047Z, Distance:  43 km
                            isolated cells to NW captured by PR
 
            QC notes:  0237-0257Z: CAE specks to W + light shower to N.
                                   Real and false echo both light and
                                   small in areal coverage. 
                             ----> Corrected. 
   
                       0302-0824Z: Light CAE patches. 
                             ----> Corrected.

                       0844Z, 0904-0913Z, 0943-0953Z, 2334Z, 2344Z: Light CAE. 
                             ----> Corrected. 
 
            % of data reprocessed:  65/239 = 27%
 
**************************************************************************  

08 Aug 99:  Scattered showers after 07Z through 15Z mostly in S half of 
            radar scope, then over land after 17Z.  TRMM overpass at
            2358Z may capture some scattered precip to NW. 
 
            Data processed: 0005-2356Z
 
            Sat. Coincidence:  0111Z(409 km), 0248Z(625 km), 0424Z(256 km),
                               0601Z(623 km), 2358Z(141 km)

            OVERPASS CASE:  Orbit: 9763, Time: 2358Z, Distance: 141 km
                            scattered precip to NW may be captured by PR 
 
            QC notes:  0055Z, 0130Z, 0206-0522Z:  Scattered patches of
                                   light to intense AP...no precip w/in
                                   150 km.
                             ----> Corrected.
 
                       0552-0601Z: Light CAE specks to W + precip to SE.
                             ----> Corrected. 
 
                       0652-0702Z: Same as previous period.
                             ----> Corrected. 
 
                       1220-1658Z: Some chunks of precip removed by defaults
                                   in convection to NE of radar.            
     2B !!FLAG!!             ----> Corrected, but bringing back precip also
                                   introduces light CAE contamination.
 
                       2023-2028Z: Small precip cell to W missing.
                             ----> Corrected. 
 
            % of data reprocessed:  92/249 = 37% 

**************************************************************************
 
09 Aug 99:  Scattered convection left over from previous day dissipates
            quickly after 01Z.  Some isolated, small convective cells
            to ESE near 13Z, then again after 17Z.
 
            Data processed: 0000-2358Z
 
            Sat. Coincidence:  0135Z(603 km), 0312Z(486 km), 0448Z(187 km),
                               2246Z(222 km)
 
            QC notes:  0017-0125Z: Some chunks of precip removed by defaults.  
                             ----> Corrected.

                       0219-0626Z: Light CAE remnants. 
                             ----> Corrected. 

                       0647-0756Z: Same as previous period.
                             ----> Corrected. 

                       0835-0906Z: Same as previous period.
                             ----> Corrected. 

                       0925-0935Z, 0955Z: Same as previous period.
                             ----> Corrected. 

                            1034Z: Small CAE speck to W, small precip cell 
                                   to E.
                             ----> Corrected. 

                       1147-1153Z: CAE patch to NE + a few precip cells.
                             ----> Corrected. 

                       1620-1630Z: Small shower to SE removed by defaults. 
                             ----> Corrected. 

                       1956-2016Z: Dissipating cell to E removed. 
                             ----> Corrected.  Perhaps some light spurious echo
                                   to W at 2016Z...
        2B !!FLAG!!          ====> 2016Z: Maybe light spurious echo. Very minor.

            % of data reprocessed:  65/229 = 28%    

**************************************************************************
 
10 Aug 99:  A few convective cells form near 14Z.  Other isolated cells 
            form and dissipate for the remainder of the day, mostly near
            or outside 150 km in the SE quadrant of scope. 
 
            Data processed: 0004-2355Z
 
            Sat. Coincidence: 0022Z(470 km), 0159Z(610 km), 0336Z(168 km), 
                              2134Z(667 km), 2310Z(230 km)
 
            QC notes:  0256-1057Z: Light spurious echo patches, mostly W.
                                   No apparent precip echoes.
                             ----> Corrected.
 
                            1147Z: Light spurious echo patch to NE.
                             ----> Corrected. 
 
            % of data reprocessed:  55/191 = 29%     

**************************************************************************
 
11 Aug 99:  A few isolated cells over Gulf of Mexico, perhaps more 
            activity after data gap begins. 
 
            Data processed: 0000-2345Z
 
            Sat. Coincidence: 0047Z(622 km), 0223Z(429 km), 0400Z(307 km),
                              2157Z(108 km), 2334Z(520 km)
 
            QC notes:  0051-0056Z: Light spurious to NE? Lone precip echo
                                   closer in to ENE? 
       1B !!FLAG!!           ----> Left as is...could not remove false
                                   echo at longer ranges and keep small
                                   shower intact.  Thus, flagged as minor
                                   problem.

                       0111-0126Z: Same as previous period?
       1A, 1B !!FLAG!!       ----> Small speck of moderate false echo to
                                   NE near 150 km at 0111Z...otherwise,
                                   very minor problem. 

                       0211-0932Z: Scattered light (some intense specks too)
                                   spurious echo.  No obvious precip echo.
                             ----> Corrected.

                       2025-2131Z: Precip shaved away by defaults.
       2B !!FLAG!!           ----> Corrected, but params had to be moved
                                   much lower, thus allowing some light
                                   spurious echo specks to reappear. 
 
            % of data reprocessed:  79/235 = 34% 

**************************************************************************

12 Aug 99:  A few isolated, small convective cells in latter half of day.
 
            Data processed: 0011-2341Z
 
            Sat. Coincidence: 0111Z(586 km), 0247Z(75 km), 2045Z(531 km),
                              2221Z(310 km), 2358Z(630 km)
 
            QC notes:  0241-0558Z: Light spurious echo.
                             ----> Corrected. 

                       0708-0728Z: Light spurious echo.
                             ----> Corrected. 
 
            % of data reprocessed:  24/201 = 12%   

**************************************************************************
 
13 Aug 99:  No obvious precip echoes. 
 
            Data processed: 0000-2350Z
                          
            Sat. Coincidence: 0135Z(364 km), 0311Z(433 km), 2109Z(3 km),
                              2245Z(562 km)
 
            QC notes:  0937-1026Z: Light spurious echo to W & NW. 
                             ----> Corrected.

                            1105Z: Same as previous period.
                             ----> Corrected.

                            2311Z: Light spurious echo speck.
                             ----> Corrected.
 
            % of data reprocessed:   8/145 = 6%

**************************************************************************
 
14 Aug 99:  Isolated, small cells from 14-16Z. Scattered convection moves
            in from NE towards SW from 18Z onwards.
 
            Data processed: 0001-2359Z
                            
            Sat. Coincidence: 0022Z(551 km), 0159Z(30 km), 1956Z(395 km),
                              2133Z(384 km), 2310Z(628 km)
 
            QC notes:  0001-0021Z: Light spurious echo to W & NW.
                             ----> Corrected.
 
                       0149-1308Z: Scattered assortment of spurious echo.
                             ----> Corrected. 
   
                       1337-1512Z: Precip to NE, light to intense specks
                                   and patches of spurious echo in W
                                   half of scope.

                       2006-2359Z: Light to moderate spurious echo to E?
                                   Might be second trip.
        2B !!FLAG!!          ----> Some VOSs still have light spurious
                                   echo contamination.  Increasing 
                                   params punched holes in and around
                                   convection.  Minor problem. 
 
            % of data reprocessed:  136/201 = 68%

**************************************************************************
 
15 Aug 99:  Scattered convection early, but mostly dissipates by 03Z.
            One lone cell forms near 05Z to SW amidst a sea of spurious
            echo.  Widespread spurious echo persists for much of the day.
 
            Data processed: 0004-2350Z
 
            Sat. Coincidence: 0046Z(287 km), 0223Z(571 km), 2020Z(104 km), 
                              2157Z(594 km), 2334Z(506 km) 
 
            QC notes:  0004-0216Z: Light scattered spurious echo + precip.
    1B, 2B !!FLAG!!          ----> Improved, but still could be some light
                                   contamination. 
 
                       0221-0326Z: Same as previous period, except chunks
                                   of precip removed by default params.
    1B, 2B !!FLAG!!          ----> Improved, but still could be some light
                                   contamination.  

                       0331-0437Z: Widespread light to moderate false echo.
                             ----> Corrected. 

                       0442-0547Z: Same as previous period + lone cell 
                                   to SW. 
                             ----> Corrected, except for:
        2B !!FLAG!!          ====> 0547Z: Light contamination to W.  

                       0552-1851Z: Widespread light to moderate (some intense
                                   specks) false echo. 
                             ----> Corrected. 

            % of data reprocessed:  167/201 = 83%

**************************************************************************
 
16 Aug 99:  Broken line of scattered convection to SE after 19Z. 
 
            Data processed: 0005-1454Z
                            1759-2358Z
 
            Sat. Coincidence: 0110Z(142 km), 1908Z(269 km), 2044Z(448 km),
                              2221Z(617 km), 2358Z(204 km) 
 
            QC notes:  0200-0837Z: Light to moderate CAE, maybe some AP. 
                                   Sometimes widespread.
                             ----> Corrected.

                       1156-1355Z: Same as previous period.

                       1415-1454Z: Small precip cell to SE, some CAE
                                   specks to W.
 
            % of data reprocessed:  59/156 = 38%

**************************************************************************
 
17 Aug 99:  Scattered precip for most of the day moving from SE to NW. 
            A few briefly intense precip cores, but nothing very organized
            or long-lived.
 
            Data processed: 0004-2352Z
 
            Sat. Coincidence: 0134Z(711 km), 1755Z(724 km), 1932Z(195 km),
                              2108Z(615 km), 2245Z(453 km) 
 
            QC notes:  0154-0310Z: One cell to SSW + patches of light
                                   to moderate spurious echo.
                             ----> Corrected. 

                       0315-0538Z: Light to moderate spurious echo.
                             ----> Corrected.

                       0548-0635Z: Precip + light CAE. 
                             ----> Corrected. 

                            0645Z: Same as previous period.
                             ----> Corrected. 

                       1036-1046Z: Precip cell to SW removed by defaults. 
                             ----> Corrected. 

                       1638-1643Z: Precip cell to S removed by defaults.
                             ----> Corrected. 

                       1759-1804Z: Same as previous period.
                             ----> Corrected. 

                       1829-1925Z: Precip removed by defaults.
                             ----> Corrected. 

                            2100Z: Same as previous period.
                             ----> Corrected. 

                       2131-2141Z: Same as previous period.
                             ----> Corrected. 

                            2332Z: Same as previous period.
                             ----> Corrected. 

            % of data reprocessed:  65/269 = 24%

**************************************************************************
 
18 Aug 99:  A few convective cells form in S half of scope after 11Z.
 
            Data processed: 0002-2351Z
 
            Sat. Coincidence: 0022Z(258 km), 1819Z(154 km), 1956Z(501 km),
                              2132Z(596 km), 2309Z(114 km)
 
            QC notes:  0214Z, 0224Z, 0239Z, 0254-0354Z: Light CAE.
                             ----> Corrected.
 
 
            % of data reprocessed:  14/238 = 6%               

**************************************************************************
 
19 Aug 99:  A few isolated convective cells after 19Z.  Convective complex
            to SE skirts the 150 km range ring from 20Z through 23Z.
 
            Data processed: 0001-2352Z
 
            Sat. Coincidence: 1707Z(582 km), 1843Z(281 km), 2020Z(628 km),
                              2157Z(390 km), 2333Z(384 km)
 
            QC notes:  0253-0750Z, 0810Z, 0829-0910Z, 0939-1009Z, 1048Z,
                       1218-1228Z, 1257-1357Z, 1456Z:
                                   Scattered specks and patches of mostly
                                   light to moderate CAE, AP, and/or 2nd
                                   trip echo. 
                             ----> Corrected.
          
                       1825-2157Z: Precip + some light spurious echo.
     1B, 2B !!FLAG!!         ----> Algorithm does decent job of picking
                                   our precip cores that are embedded
                                   w/in larger shields of spurious
                                   echo.  May still be some edges
                                   of non-precipitating echo kept in
                                   around precip cores, but difficult
                                   to distinguish exactly where the
                                   boundary is...also a few specks of
                                   spurious echo may exist, but a very
                                   minor problem.        

                       2202-2356Z: Some precip shaved off cell to W of
                                   radar.  Also some AP to E.
     1B, 2B !!FLAG!!         ----> Improved both problems, but a few
                                   VOSs may still have spurious echo,
                                   while a few pixels of precip still
                                   appear to be shaved away...decent
                                   trade-off, though.
 
            % of data reprocessed:  75/178 = 42%

**************************************************************************
 
20 Aug 99:  Scattered convection in N half of scope after 19Z.  Cells
            are briefly intense, but quickly dissipate after gust front
            moves away.  TRMM overpass near 2221Z captures scattered
            convection. 
 
            Data processed: 0002-2350Z
 
            Sat. Coincidence: 1731Z(38 km), 1907Z(547 km), 2044Z(565 km),
                              2221Z(11 km)

            OVERPASS CASE:  Orbit: 9951, Time: 2221Z, Distance:  11 km
                            broken convective line to N captured by PR 
 
            QC notes:  0157-0202Z:  Light spurious echo specks + small
                                    shower to NW.
                             ---->  Corrected. 

                       0217-1506Z:  Light to intense CAE/AP, often
                                    widespread. No obvious precip echoes.
                             ---->  Corrected. 

                            1843Z:  Speck to E. 
                             ---->  Corrected. 

                            1959Z:  CAE to NE + precip to extreme NNE.
                             ---->  Corrected. 

                       2209-2229Z:  Obvious false echo patches to E +
                                    scattered convection to N.
     1B !!FLAG!!             ---->  Corrections made to 2209-2219Z, but
                                    speck persists in other VOSs. Minor
                                    problem.

                       2244-2249Z:  Same as previous period. 
     1B !!FLAG!!             ---->  Increasing params to remove false
                                    echo punches holes in precip. So,
                                    left as is. Minor problem.

                       2254-2350Z:  Same as previous period. Also, holes
                                    developing in precip to NW.
     2A, 2B !!FLAG!!         ---->  Fixed holes by decreasing H2 and Z0
                                    params, but unable to remove all of
                                    spurious echo in the process. 
  
            % of data reprocessed:  117/202 = 58%      

**************************************************************************
 
21 Aug 99:  Convection left over from previous day dissipates in the
            first few hours.  Scattered, disorganized convection 
            forms again after 15Z.  Typical pattern for the past few
            days.
 
            Data processed: 0001-1802Z
                            1842-2359Z  

            Sat. Coincidence:  1618Z(445 km), 1755Z(358 km), 1932Z(630 km),
                               2108Z(317 km), 2245Z(618 km)
 
            QC notes:  0001-0051Z: Precip removed by defaults. 
     2A, 2B !!FLAG!!         ----> Painful period.  Reduced params
                                   to bring back precip, but also
                                   introduced specks and patches.
                                   Still some light precip shaved away
                                   in some VOSs.  Flagged the whole
                                   period as a combination of minor
                                   and major problems.    

 
                       0147-0432Z: Scattered to widespread CAE + 
                                   precip (only lone precip cell
                                   by end of the period).   
         2B !!FLAG!!         ----> Signficant improvements made,
                                   but still some specks and 
                                   patches of CAE in a few VOSs.

                       0437-1122Z: Often widespread CAE.  No
                                   significant, obvious precip
                                   cells.  Questionable echo
                                    to E near 1013Z, but not
                                   convinced it's precip.
                             ----> Corrected. 

                       1222-1441Z: Patches of light spurious echo.
                             ----> Corrected. 

                       1446-1456Z: CAE + precip cell.
                             ----> Corrected. 

                       1506-1511Z: Same as previous. 
                             ----> Corrected. 

                            1541Z: Same as previous.
                             ----> Corrected. 

                       1607-1622Z: CAE.
                             ----> Corrected. 

                       1627-1646Z: CAE + precip.
                             ----> Corrected. 

                       2133-2153Z: Precip removed by defaults.
                             ----> Corrected. 
 
            % of data reprocessed:  128/227 = 56%

**************************************************************************
 
22 Aug 99:  Isolated cells form near 07Z, then again after 08Z in SE 
            quadrant.  A band of precip, containing embedded intense
            convection, lingers in the SW quadrant from 13-21Z before
            largely falling apart (although much of the widespread
            precip remains outside of 150 km).  Seems very tropical
            in nature.  TRMM overpass at 1642Z captures some of this
            precip band.   TRMM overpass at 2132Z coincides with
            scattered convection after main precip band breaks
            apart.
 
            Data processed: 0005-2355Z
 
            Sat. Coincidence: 1642Z(65 km), 1819Z(582 km), 1956Z(525 km),
                              2132Z(97 km)  

            OVERPASS CASE:  Orbit: 9979, Time: 1642Z, Distance:  65 km
                            band of precip w/ embedded intense convection
                            captured by PR

                            Orbit: 9982, Time: 2132Z, Distance:  97 km
                            scattered convection captured by PR
 
            QC notes:  0221-0658Z: CAE, sometimes widespread.
                             ----> Corrected.

                       0703-0748Z: CAE + precip.
                             ----> Corrected.

                       0803-0823Z: Same as previous.  
                             ----> Corrected.

                            0909Z: Same as previous.
                             ----> Corrected.

                            0949Z: Same as previous.
                             ----> Corrected.
 
            % of data reprocessed:  73/275 = 27%

**************************************************************************
 
23 Aug 99:  Scattered precip mostly in S half of radar scope through 14Z.
            After 15Z, scattered convection forms to N of radar, too.
            Much of the convection is oriented in SE-NW lines.
 
            Data processed: 0000-2351Z
 
            Sat. Coincidence: 1530Z(319 km), 1706Z(423 km), 1843Z(623 km),
                              2020Z(238 km), 2156Z(654 km)
 
            QC notes:  0227, 0237, 0247, 0257, 0307-0317, 0327-0533Z
                       0543, 0553-0603, 0613, : CAE + precip.
                             ----> Corrected. 
                            
            % of data reprocessed:  37/281 = 13% 

**************************************************************************
 
24 Aug 99:  Convection from previous day dissipates by 04Z.  Scattered
            convection forms again by 06Z, though.  Coverage of precip
            increases rapidly after 17Z, but quickly dies off near 22Z.
            Potential TRMM overpasse 2044Z. 
  
 
            Data processed: 0001-2348Z

            Sat. Coincidence: 1554Z(162 km), 1730Z(608 km), 1907Z(474 km),
                              2044Z(213 km) 

            OVERPASS CASE:  Orbit: 10013, Time: 2044Z, Distance: 213 km
                            a few convective cells to SW captured by PR
                            
            QC notes:  0223, 0233, 0248-0304, 0313, 0353-0358, 0429,
                       1258-1303: CAE + precip 
                             ----> Corrected.

                       1318-1338Z: Light to intense AP specks to W
                                   + small showers.
      2B !!FLAG!!            ----> Corrected the most intense 
                                   contamination.  Perhaps a couple
                                   of light specks left.

      1B, 2B !!FLAG!!  1504-2056Z: Perhaps some light CAE on edges of
                                   precip to NE.  Viewed as a minor
                                   problem...qc params aren't revised. 

 
      2A !!FLAG!!      2132-2142Z: Embedded intense spurious spike to
                                   W.  Params not revised since it's
                                   embedded in precip.

                       2323-2348Z: Light CAE to NE.
                             ----> Corrected. 

            % of data reprocessed:  18/284 = 6% 

**************************************************************************
 
25 Aug 99:  Scattered precip after 09Z.  Areal coverage of precip
            much less than previous days.   
 
            Data processed: 0003-2346Z 
 
            Sat. Coincidence: 1441Z(195 km), 1618Z(483 km), 1755Z(605 km),
                              1931Z(148 km)
 
            QC notes: 0138-0855Z: Often widespread patches of CAE and AP.
                            ----> Corrected.

                      0900-1136Z: CAE + precip.
                            ----> Corrected. 

                      1200-1206Z: Same as previous.
                            ----> Corrected. 

                      1240-1346Z: Same as previous. 
                            ----> Corrected. 

                           1416Z: Same as previous.
                            ----> Corrected. 

                      1426-1557Z: Strange light echo patch directly NE
                                  of radar.   
                            ----> Corrected. 

                      1924-2346Z: CAE patches + precip. 
     1B !!FLAG!!            ----> Improvements made, but still 
                                  some potential light contamination
                                  in QC'ed product. 
 
            % of data reprocessed:  165/231 = 71%   

**************************************************************************

26 Aug 99:  A few isolated convective cells. 
 
            Data processed: 0003-2346Z
 
            Sat. Coincidence: 1329Z(635 km), 1505Z(250 km), 1642Z(624 km),
                              1819Z(415 km), 1955Z(335 km)
 
            QC notes:      0147Z: Small speck to W. 
                            ----> Corrected.

                      0202-1059Z: Widespread CAE/AP.
                            ----> Corrected. 

                           1104Z: Small CAE speck to NW.
                            ----> Corrected. 

                      1152-1210Z: CAE.
                            ----> Corrected. 

                      1216-1501Z: Light AP + precip. 
                            ----> Corrected. 

                      1506-1552Z: Light AP.
                            ----> Corrected. 

                           1602Z: Same as previous. 
                            ----> Corrected. 

                      1647-1702Z: Light speck to SW.
                            ----> Corrected. 

                           1712Z: Same as previous.
                            ----> Corrected. 

                      1721-1728Z: Same as previous.
                            ----> Corrected. 

                      1753-1823Z: Same as previous.
                            ----> Corrected. 

                      1833-2140Z: Same as previous.
                            ----> Corrected. 

                      2200-2230Z: Light AP to NE.
                            ----> Corrected. 

                      2240-2255Z: Same as previous.
                            ----> Corrected. 

                      2305-2320Z: Same as previous. 
                            ----> Corrected. 
 
            % of data reprocessed: 199/257 = 77%
                                                      
**************************************************************************

27 Aug 99:  Convective complex fires up to NE after 17Z, is very intense
            by 19Z, breaks apart into segmented cells between 19-20Z,
            then dissipates as gust front quickly outpaces the convection.
            TRMM overpass near 1843Z captures intense convection just
            inside 150 km range to NE.

            Data processed: 0006-2349Z

            Sat. Coincidence: 1353Z(83 km), 1529Z(530 km), 1706Z(579 km),
                              1843Z(53 km) 

            OVERPASS CASE:  Orbit: 10059, Time: 1843Z, Distance:  53 km
                            intense convection near 150 km to NE captured
                            by PR

            QC notes: 0036-0052Z: Intense AP patches to ENE.
                            ----> Corrected.

                      0102-0132Z: Scattered intense AP patches to NE & SW.
                            ----> Corrected. 

                      0202-1039Z: AP/CAE, mostly light w/ a few intense
                                  specks mixed in.  Often widespread.
                            ----> Corrected. 

                      1149-1548Z: Scattered light spurious echo. 
                            ----> Corrected. 

                      1637-1647Z: Same as previous.
                            ----> Corrected. 

                           1707Z: Same as previous.
                            ----> Corrected. 

                           1731Z: Small, light speck to W + precip to NE.
                            ----> Corrected. 

                      1747-1822Z: Same as previous.
                            ----> Corrected. 

                      1832-1852Z: Same as previous + CAE to NE, too.
                            ----> Corrected. 

                      1902-2349Z: Mixture of light spurious echo, plus
                                  some intense AP patches behind outflow. 
                                  Precip persists throughout entire period.
     2A, 2B !!FLAG!!        ----> Improved the situation, but still some
                                  light spurious echo in some VOSs.  Also
                                  some embedded intense AP near 2030Z. 

            % of data reprocessed:  179/198 = 90%

**************************************************************************  

28 Aug 99:  Isolated precip after 08Z.  Some intense, small convective
            cores, but nothing organized or long-lived. 
 
            Data processed: 0006-2359Z
 
            Sat. Coincidence: 1240Z(498 km), 1417Z(329 km), 1553Z(630 km),
                              1730Z(347 km), 1907Z(465 km) 
 
            QC notes: 0135-0752Z: Often widespread patches of CAE and AP.
                            ----> Corrected.

                      0802-1017Z: Precip + light to moderate spurious 
                                  echo.
                            ----> Corrected. 

                      1022-1028Z: Intense AP patch to NNW + precip.
                            ----> Corrected. 

                      1143-1153Z: AP specks to NW + precip.
                            ----> Corrected. 

                      1203-1610Z: Precip + light patches of spurious
                                  echo.
      1B, 2B !!FLAG!!       ----> Some possible light contamination in
                                  a few VOSs, but not a major problem.  

                      1630-1756Z: Same as previous.     
                            ----> Corrected. 

                      1801-1821Z: Light patches of spurious echo. 
                            ----> Corrected. 

                      1826-2354Z: Precip + patches of spurious echo. 
      1B, 2B !!FLAG!!       ----> Some possible light contamination in
                                  a few VOSs, but not a major problem. 

            % of data reprocessed:  242/278 = 87%
 
**************************************************************************   

29 Aug 99:  Convective cells in NW corner of scope through 03Z.  One lone
            cell persists through about 05Z. Isolated cells form to W and
            NW after 10Z, also to E.  Cell to ESE is very intense at
            times and lingers in the SE quadrant through 17Z.  A last
            round of convection forms after 18Z in the form of an W-E
            broken line that sinks to the S.  TRMM overpasses at
            1304Z catches some scattered convection, while the 1754Z
            overpass captures the intense multicell to the SE.  
 
            Data processed: 0005-2359Z
 
            Sat. Coincidence: 1304Z(27 km), 1441Z(570 km), 1618Z(541 km),
                              1754Z(54 km)

            OVERPASS CASE:  Orbit: 10087, Time: 1304Z, Distance:  27 km
                            scattered convection captured by PR 

                            Orbit: 10090, Time: 1754Z, Distance:  54 km
                            intense multicell complex to SE of radar 
                            observed by PR 
 
            QC notes: 0200-0507Z: CAE/AP + precip.
        2B !!FLAG!!         ----> Most contamination corrected, 
                                  but still may be some on fringes
                                  of precip cores. 

                      0512-0758Z: CAE/AP.
                            ----> Corrected.

                      0803-0845Z: CAE/AP + precip to E. 
                            ----> Corrected.

                      0850-1545Z: CAE/AP + precip.
    1B, 2B !!FLAG!!         ----> Improved greatly, but still 
                                  some potential contamination.

                      1630-2355Z: CAE + precip.  Also some remnants
                                  from boundary to NE of radar.  
                                  Assuming nothing is precipitating
                                  from the shallow echoes associated
                                  w/ the boundary.  Assumption could
                                  be incorrect! Also some precip
    1B, 2B, 2A !!FLAG!!           removed by defaults from 1917-2027Z.
                            ----> Same situation as previous period,
                                  but also a major flag for moderately
                                  intense contamination from 1932-2027Z.
                                  and 2108, 2133, 2255, and 2315Z.

 
            % of data reprocessed:  240/271 = 89%       

**************************************************************************
 
30 Aug 99:  A few isolated cells. 
 
            Data processed: 0006-2357Z

            Sat. Coincidence: 1152Z(367 km), 1328Z(399 km), 1505Z(627 km),
                              1642Z(270 km), 1818Z(600 km)
 
            QC notes: 0016-0045Z: CAE/AP + precip.
                            ----> Corrected.  Took out small, light
                                  precip in SW from 0031-0045Z since
                                  it was very insignificant, esp 
                                  compared to intense contamination.

                      0100-0105Z: Contamination to NE, light
                                  precip to SW.
                            ----> Corrected.

                      0120-1135Z: Light to intense patches of
                                  contamination.
                            ----> Corrected.

                      1140-1209Z: Scattered light to moderate
                                  patches of contamination +
                                  light precip to SE (as seen
                                  in second tilt images).
                            ----> Corrected contamination
                                  w/in 150 km, with the 
                                  possible exception of 1145Z.
        1B !!FLAG!!         ====> 1145Z:  Possible light 
                                   contamination still exists.

                      1214-1234Z: Light, scattered contamination
                                  & no precip w/in 150 km. 
                            ----> Corrected.

                      1241-1614Z: Same as 1140-1209Z.
                            ----> Corrected inside 150 km. 

                      1619-1910Z: Same as 1214-1234Z.
                            ----> Corrected.

                      1915-2221Z: Light to moderate scattered
                                  contamination + potential
                                  precip to SW (see 2nd tilt  
                                  imagery for verification of
                                  precip).

                      2226-2357Z: Light to intense patches of
                                  contamination. 

            % of data reprocessed:  275/281 = 98%          

**************************************************************************
 
31 Aug 99:  A small convective cluster moves in from the E after 0630Z.
            Another one follows after 08Z and blossoms into a very
            intense complex at 0944Z.  This complex weakens by 12Z, but
            another mass of organzied convection spreads into the SW
            portion of the scope by 12Z and slides along the S/SW
            edge of 150 km through 17Z.  A final round of convection
            moves in from E after 17Z.  Numerous multicell systems 
            form along a wide, arcing outflow (nicely seen near 21Z). 
           TRMM overpass at 1215Z appears to miss all of the precip,
            but the 1705Z overpass captures some dissipating convection
            to the SSW of radar. 
 
            Data processed: 0002-2356Z
 
            Sat. Coincidence: 1215Z(123 km), 1352Z(599 km), 1529Z(497 km),
                              1705Z(163 km) 

            OVERPASS CASE:  Orbit: 10121, Time: 1705Z, Distance: 163 km
                            dissipating convective complex to SSW 
                            captured by PR

            QC notes: 0002-0623Z: Scattered regions of light to intense
                                  AP, especially awful through 03Z, but
                                  no obvious precip echoes.  
                            ----> Corrected.

                      0629-0634Z: Scattered contamination specks +
                                  convection edging in from E. 
                            ----> Corrected. 

                      0709-0909Z: Same as previous period.
                            ----> Most VOSs corrected w/in 150 km,
                                  but the following VOSs have 
                                  major problems:
       2A !!FLAG!!          ====> 0744-0758Z: Intense patches of
                                  AP to NE at far ranges.  Intense
                                  specks of AP to NW at far ranges.
                                  Cannot remove w/o eliminating
                                  precip.

                      0929Z, 0949Z, 0959Z, 1009Z: Same as previous.
                            ----> Corrected.

                      1024-1034Z: Same as previous.
                            ----> Corrected.

                      1045-1120Z: Same as previous.
                            ----> Corrected.

                      1205-1321Z: AP to NE, precip to SW.

                      1331-1512Z: Scattered contamination
                                  specks and patches + 
                                  precip to S & SE.
                            ----> Corrected. 

                     1522Z&1532Z: Same as previous.
        1B !!FLAG!!         ----> Parameter maninpulation did not
                                  yield better results, therefore
                                  possible light contamination to
                                  NE still exists.  Minor problem.

                     1642Z&1652Z: Same as previous. 
                            ----> Corrected. 

                           2257Z: Nasty patch of AP to NW w/
                                  precip elsewhere.
        2A !!FLAG!!         ----> MUch improved, but still a
                                  chunk of embedded AP that 
                                  cannot be removed, as well as
                                  a few intense clutter specks 
                                  near the radar.

                      2302-2314Z: A couple moderate to
                                  intense small clutter 
                                  specks immediately SW
                                  of radar.  
       2A !!FLAG!!          ----> Embedded in precip, so
                                  cannot remove w/o taking
                                  out precip.

            % of data reprocessed: 145/279 = 52%