Site log - Houston (Sept 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 Sep 99:  Almost continual procession of scattered convection and organized
            convective systems.  Precip rotates around a central of 
            circulation that seems to drift to NNW throughout the day.
            Precip increases significantly in areal coverage over the Gulf
            after 07Z.  Most precip over Gulf dissipates near 16Z, but
            scattered, small convective cells form over land afterwards.
            A multicell complex forms directly N of radar after 1930Z.
            TRMM overpass at 1553Z captures stratiform region left over
            from previous convective system. 
 
            Data processed: 0001-2359Z
 
            Sat. Coincidence: 1103Z(244 km), 1239Z(460 km), 1416Z(614 km),
                              1553Z(186 km), 1729Z(741 km) 

            OVERPASS CASE:  Orbit: 10136, Time: 1553Z, Distance: 186 km
                            stratiform from dissipating convection in
                            NE quadrant of radar scope captured by PR

            QC notes:  0223Z, 0233-0253Z, 0303-0418Z, 0429Z, 
                       0439-0459Z: Mostly light specks of contamination 
                                   w/ precip.
                             ----> Corrected. 

                            0458Z: Bad scan

                       0509-0514Z: Moderate clutter speck to SW.
                             ----> Corrected.

                       0534-0623Z: Same as previous period.
                             ----> Corrected.

            % of data reprocessed:  40/281 = 14%  

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

02 Sep 99:  Precip for most of the day again.  A convective band forms
            to N of radar (line oriented N-S) early on and persists thru
            09Z.  Training of moderate to heavy precip over same locations
            probably causes significant precip accumulations.  Precip
            largely dissipates &/or moves out of scope by 12Z w/ only
            a few isolated cells w/in 150 km range. Broken convection
            moves in from NW along an outflow boundary late in the day. 

            Data processed: 0004-2358Z
 
            Sat. Coincidence: 0951Z(693 km), 1127Z(215 km), 1304Z(619 km),
                              1440Z(441 km), 1617Z(284 km) 
 
            QC notes:  1204-1229Z: False echo to SSE? 
        2B !!FLAG!!          ----> 2nd tilt imagery shows  few small
                                   cells moving through the region of
                                   questionable 1st tilt echo. Echoes
                                   left intact but flagged as a 
                                   potential minor problem. 

            % of data reprocessed:  0/284 = 0%

**************************************************************************
 
03 Sep 99:  Convective complexes to W and NNE persist for first few
            hours, then dissipate by 05Z.  Scattered precip to S and
            SE after 10Z eventually organizes into numerous lines
            and convective segments from 13-20Z.  Coverage and
            intensity of precip gradually wanes throughout the
            remainder of the day, except for a brief flare-up in
            SE sector near 2230-2300Z.  TRMM overpass at 1504Z
            may barely catch some of the widespread convection
            in S half of scope.
 
            Data processed: 0003-2349Z
 
            Sat. Coincidence: 1014Z(128 km), 1151Z(511 km), 1328Z(591 km),
                              1504Z(93 km)

            OVERPASS CASE:  Orbit: 10167, Time: 1504Z, Distance:  93 km
                            some of the widespread convection in S half
                            of radar scope may be captured by PR swath,
                            although most of the PR swath misses precip
 
            QC notes:  0214-0606Z: Mostly light specks and patches of 
                                   contamination to SW + precip in E
                                   half of radar scope. 
                             ----> Corrected.

                       0611-0717Z: Same as previous period, except no
                                   precip w/in 150 km.
                             ----> Corrected. 

                       0742-0747Z, 0802Z: Light CAE to NW + precip cell to SE.
                             ----> Corrected. 

                       1159-1536Z: Light patch of spurious echo to NE at
                                   far ranges + convection in S half of scope.
                             ----> Corrected. 
 
            % of data reprocessed:  0/281 = x%   

**************************************************************************
 
04 Sep 99:  A few remnant showers early.  A few cells pop up after 09Z,
            then a fairly widespread round of scattered convection after 
            15Z.  Most individual cells are not long-lived, and most
            of the activity dissipates by 2345Z.
 
            Data processed: 0000-2345Z
 
            Sat. Coincidence: 0902Z(558 kM), 1038Z(295 km), 1215Z(629 km),
                              1351Z(379 km), 1528Z(406 km) 
 
            QC notes:  0241-0246Z: A few light specks to NNE w/ a 
                                   couple small cells to E.
                             ----> Corrected.

                       0256-0301Z: Light speck to NNE, no precip w/in
                                   150 km.
                             ----> Corrected. 

                       0311-0316Z: Same as previous period.
                             ----> Corrected. 

                       0326-0405Z: Light contamination specks + small
                                   shower to NE.
                             ----> Corrected. 

                       0415-0425Z: A few light specks.
                             ----> Corrected. 

                       1200-1331Z: Possible light contamination to NE +
                                   scattered precip elsewhere.
                             ----> Corrected. 
 
            % of data reprocessed:  32/257 = 12%


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

05 Sep 99:  A few isolated showers for first half of the day.
            Activity becomes more widespread after 15Z to the E, 
            the spreading to the S and NW quadrants afterwards.
            The most impressive convective complex develops to
            the NW after 23Z. TRMM overpass at 1416Z captures
            a few cells E of the radar...not a very impressive
            overpass case,though. 
 
            Data processed: 0000-2358Z
 
            Sat. Coincidence: 0926Z(20 km), 1102Z(554 km), 1239Z(559 km),
                              1416Z(8 km)

            OVERPASS CASE:  Orbit: 10198, Time: 1416Z, Distance:  8 km
                            a few small cells to E of radar captured by PR 
 
            QC notes:  No obvious QC problems.
 
            % of data reprocessed:  0/253 = 0% 

**************************************************************************
 
06 Sep 99:  Leftover convection from previous day lingers and slowly
            dissipates by 03Z.  Some light showers to S thru 10Z.
            Scattered convection forms after 13Z in various locations
            around the radar scope. 
 
            Data processed: 0003-2350Z
 
            Sat. Coincidence: 0813Z(422 km), 0950Z(370 km), 1126Z(630 km),
                              1303Z(304 km), 1439Z(542 km) 
 
            QC notes:  0218-0919Z: Light scattered specks and patches
                                   of contamination + precip to N early,
                                   and light showers to S later on. 
        1B, 2B !!FLAG!!      ----> Vast improvements made to this 
                                   time period.  Still a few VOSs 
                                   near 07 & 08Z w/ potentially some
                                   light patches of contamination,
                                   but it's a  very minor problem. 

                       0949-0954Z: Same as previous period.
                             ----> Corrected.

                       1004Z, 1014-1019Z: Same as previous.
                             ----> Corrected.

                       1049-1105Z: Light to moderate specks to NW.
                             ----> Corrected.

                       1205-1210Z: Specks to NE.
                             ----> Corrected.

                       1215-1249Z: Specks to NE + precip in SE.
                             ----> Corrected.

                       1259Z, 1315-1320Z: Same as previous period. 
                             ----> Corrected.

            % of data reprocessed:  98/273 = 36%   


**************************************************************************
 
07 Sep 99:  Dissipating convection to NW and W fades away by 02Z.
            Isolated, small cells from 12-23Z.
 
            Data processed: 0005-2352Z
 
            Sat. Coincidence: 0837Z(84 km), 1014Z(588 km), 1151Z(516 km), 
                              1327Z(118 km)
 
            QC notes:  0126-0236Z: CAE + precip to NNW and WSW.
                             ----> Mostly corrected.  A speck or
                                   two of light CAE may still
                                   exist in a VOS or two, but
                                   it's often difficult to
                                   discern whether it's a real
                                   embedded shower or not.

                       0241-1123Z: CAE, no precip w/in 150 km. 
                             ----> Corrected.

                       1143Z, 1202-1251Z: CAE specks + precip
                             ----> Corrected.

            % of data reprocessed:  76/223 = 34%  


**************************************************************************
 
08 Sep 99:  Some convective cells form along the coast NE of radar 
            after 15Z.  A few more cells develop to S, SE, and W,
            but not widespread.   A nice MCS drops down from the NNE
            after 21Z.  First round of convection weakens into
            a stratiform shield by 23Z, but gust front kicks 
            off a few more intense convective elements after 2320Z.
 
            Data processed: 0007-2356Z
 
            Sat. Coincidence: 0725Z(295 km), 0901Z(435 km), 1038Z(620 km),
                              1215Z(222 km), 1351Z(680 km) 
 
            QC notes:  0133-1036Z: Often widespread light to moderate
                                   spurious echo.
                             ----> Corrected.
 
                       1115&1136Z: Light patch of CAE to NW, small cell
                                   to SW.
                             ----> Corrected. 

                       1206-1357Z: Specks. 
                             ----> Corrected.

                       1402-1612Z: Precip + spurious echo specks.
                             ----> Corrected.
                       
            % of data reprocessed:  106/221 = 48%  


**************************************************************************
 
09 Sep 99:  Convective line w/ minimal stratiform behind it moves 
            to the SSE and gradually dissipates by 03Z.  A few
            convective cells to the S after 1130Z.  
 
            Data processed: 0001-1337Z
                            1414-2359Z
 
            Sat. Coincidence: 0748Z(176 km), 0925Z(611 km), 1102Z(466 km),
                              1238Z(231 km)
 
            QC notes:  0041-0127Z: Moderate to intense AP to NE and N,
                                   sometimes embedded in precip. 
        2A !!FLAG!!         ---->  Vast improvements made in non-embedded
                                   AP, especially between 0117-0127Z 
                                   to the N.  Some intense embedded AP
                                   remains, though, between 0047-0112Z.

                       0142-0359Z: Precip + CAE & AP in W half. 
                             ----> Corrected. 

                       0403-1012Z: Widespread spurious echo . 
                             ----> Corrected. 

                       1022-1101Z: Light patches of CAE + precip to S.
                             ----> Corrected.

                       1142&1152Z: Same as previous period.
                             ----> Corrected.

                       1206-1655Z: Often widespread light contamination
                                   + precip to S. 
                             ----> Corrected.

                       1700-2329Z: Light patches of CAE.
                             ----> Corrected.
 
            % of data reprocessed:  219/240 = 91%    

**************************************************************************
 
10 Sep 99:  A lone cell after 13Z to SW, but mostly outside 150 km.
            Another shower to NW after 23Z. Otherwise dry w/ plenty
            of clear air return. 
 
            Data processed: 0005-2351Z
 
            Sat. Coincidence: 0636Z(176 km), 0812Z(491 km), 0949Z(601 km),
                              1126Z(132 km)
 
            QC notes:  0130-1903Z: CAE & AP, mostly light to moderate
                                   in intensity.  No significant precip
                                   w/in 150 km.   
                             ----> Corrected.

                       1933-2002Z: Light spurious echo specks.
                             ----> Corrected.

                       2022-2032Z: Same as previous period.
                             ----> Corrected.

                       2103-2241Z: Same as previous period.
                             ----> Corrected.

                       2251-2331Z: Light specks to NE, shower to WNW. 
                             ----> Corrected.
 
            % of data reprocessed:  152/173 = 88%          


**************************************************************************
 
11 Sep 99:  No obvious precip echoes.   
 
            Data processed: 0010-0538Z
                            0619-2350Z
 
            Sat. Coincidence:  0524Z(609 km), 0700Z(265 km), 0837Z(626 km),
                               1014Z(403 km), 1150Z(360 km)
 
            QC notes:  0140-0858Z:  CAE/AP, often widespread.
                              --->  Corrected.

                            0010Z:  CAE speck.
                              --->  Corrected.

                            0947Z:  CAE speck.  
                              --->  Corrected.

                       1156-1554Z:  Same as 0140-0858Z. 
                              --->  Corrected.

        2B !!FLAG!!    1643-2042Z:  Strange echo to NE.  More 
                                    intense than surrounding 
                                    spurious echo, but almost
                                    stationary.  Little vertical
                                    development.  Echo left 
                                    intact, but period is flagged
                                    due to uncertainty. 
 
            % of data reprocessed:  71/141 = 50%    

**************************************************************************
 
12 Sep 99:  No significant precip echoes.  
 
            Data processed: 0011-2351Z
 
            Sat. Coincidence: 0548Z(59 km), 0724Z(539 km), 0901Z(571 km),
                              1038Z(30 km)
 
            QC notes:  0220-0538Z: Light spurious echo. 
                             ----> Corrected.
 
                       0617-0638Z: Same as previous period. 
                             ----> Corrected.

            % of data reprocessed:  24/144 = 17%     


**************************************************************************
 
13 Sep 99:  Scattered cells, mostly in SE sector, for much of the day.
            Convection develops over NE sector after 21Z.  Not a
            widespread, orgnanized convective event.
 
            Data processed: 0010-2354Z
 
            Sat. Coincidence: 0435Z(470 km), 0612Z(344 km), 0749Z(630 km),
                              0925Z(332 km), 1102Z(492 km) 
 
            QC notes:  0249-0329Z: Light spurious echo.
                             ----> Corrected.

                       0349Z, 0409-0438Z, 0519Z, 0548Z: Same as previous. 

                       0909-0914Z: Light specks to NW + precip to SE.
      
                       1230Z, 1240Z, & 1255Z: Same as previous period. 

            % of data reprocessed:  17/234 = 7% 

**************************************************************************
 
14 Sep 99:  Convective cluster to ENE slides to SSW early in the day.
            Another small convective complex moves in from the
            ESE after 08Z.  Only a few isolated showers after 12Z. 
            TRMM overpass at 0459Z captures a dissipating convective
            cluster just S of the radar. 
 
            Data processed: 0000-0226Z
                            0443-2355Z 
 
            Sat. Coincidence: 0459Z(46 km), 0636Z(576 km), 0813Z(533 km),
                              0949Z(76 km)

            OVERPASS CASE:  Orbit: 10334, Time: 0459Z, Distance:  46 km
                            dissipating convective cluster to S of radar
                            captured by PR   
 
            QC notes:  0145-0150Z: Light to moderate contamination
                                   to SW at long ranges + precip
                                   to E and NE.
                             ----> Corrected.

                       0200,0216Z, 0226Z: Same as previous period. 
                             ----> Corrected. 

                       0443-0659Z: Precip removed by defaults.
        1A, 2A !!FLAG!!      ----> Bad period.  In order to restore
                                   precip, had to drastically reduce
                                   qc params. Light patches of
                                   contamination are introduced,
                                   however.  Precip echo edges
                                   are very blocky, though, as
                                   QC algorithm has difficulty
                                   picking out real echo from 
                                   clear air return.
                
                            1431Z: CAE speck to N + precip to S.
                             ----> Corrected.

                       1511-1516Z: Same as previous period.
                             ----> Corrected.

                       1531-1536Z: Same as previous period.
                             ----> Corrected.

                            1556Z: Same as previous period.
                             ----> Corrected.

                       1637Z, 1647-1657Z, 1707Z, 1722Z: Specks 
                                   near radar.
                             ----> Corrected.

                       2054Z, 2134, & 2144Z: Light, scattered
                                   contamination.
                             ----> Corrected.
 
            % of data reprocessed:  48/255 = 19%    


**************************************************************************
 
15 Sep 99:  A few isolated cells from 00-10Z.
 
            Data processed: 0006-2348Z
 
            Sat. Coincidence: 0347Z(343 km), 0523Z(411 km), 0700Z(625 km),
                              0836Z(255 km), 1013Z(626 km) 
 
            QC notes:  0222Z, 0242Z, 0252Z, 0312Z, 0513Z, 0523-0528Z, 
                       0548Z:      Light scattered contamination specks
                                   + lone precip cell near radar. 
                             ----> Corrected.
 
                       1209-1326Z: Same as previous period, but no 
                                   precip w/in 150 km.
                             ----> Corrected.

                       1356Z, 1406Z, 1416-1517Z, 1527Z, 1537Z, 
                       1631-1741Z, 1851-1920Z, 1940Z, 2000Z,
                       2019Z, 2039Z: Same as previous period. 
                             ----> Corrected.

            % of data reprocessed:  57/226 = 25%                   

**************************************************************************
 
16 Sep 99:  No significant precip echoes. 
 
            Data processed: 0008-2359Z
 
            Sat. Coincidence: 0411Z(143 km), 0547Z(604 km), 0724Z(485 km),
                              0901Z(189 km)

            QC notes:  
                       0228Z, 0248Z, 0317-0327Z, 0507Z, 
                       0716-0726Z: Scattered light contamination.
                             ----> Corrected.

                       1203-1412Z: Light spurious echo.
                             ----> Corrected.

                       1731-2129Z: Same as previous period.
                             ----> Corrected.
 
            % of data reprocessed:  46/145 = 32% 

**************************************************************************
 
17 Sep 99:  A few strange looking echoes to ENE after 18Z.  Are these
            legitimate showers?!  Look very peculiar...checked out
            satellite imagery which confirmed region was dry.  These
            echoes look very similar to plumes of wildfires.
           
 
            Data processed: 0008-2346Z
 
            Sat. Coincidence: 0258Z(217 km), 0435Z(472 km), 0612Z(609 km),
                              0748Z(165 km)
 
            QC notes:
                       0337&0357Z: Light patches of contamination. 
                             ----> Corrected.

                       0436&0616Z: Same as previous period. 
                       0645-0705Z: Same as previous period.
                       0735-0745Z: Same as previous period.
                       0825-0834Z: Same as previous period.
                       0924-0944Z: Same as previous period.
                       1014&1034Z: Same as previous period.
                       1213-1312Z: Same as previous period.
                       1422-1451Z: Same as previous period.
                       1631-1710Z: Same as previous period.
                       1740&1759-1809Z: Same as previous.
                       1830-1850Z: Same as previou period.
                             ----> All above periods corrected.

                       1859-2029Z: Light spurious echo +
                                   strange echo to ENE.
                             ----> Corrected.
 
                       2049-2128Z: Same as previous.
                             ----> Corrected.

                       2217-2227Z: Same as previous.
                             ----> Corrected. 

            % of data reprocessed:  53/143 = 37% 


**************************************************************************
 
18 Sep 99:  No obvious precip echoes.
 
            Data processed: 0056-2345Z
 
            Sat. Coincidence: 0146Z(660 km), 0322Z(235 km), 0459Z(622 km),
                              0636Z(426 km), 0812Z(314 km) 
 
            QC notes:
                       0216Z, 0354Z, 0414Z, 0444Z, 0602Z, 1010Z,
                       1140Z, 1159-1319Z, 1339-1418Z, 1727Z, 
                       1956-2016Z, 2035Z, 2105Z:  Light CAE specks.
                             ----> Corrected.
 
            % of data reprocessed:  27/139 = 19%     


**************************************************************************
 
19 Sep 99:  Continued dry conditions. 
 
            Data processed: 0004-2344Z
 
            Sat. Coincidence: 0210Z(101 km), 0346Z(523 km), 0523Z(583 km),
                              0700Z(68 km)
 
            QC notes:
                       0304-0314Z, 0343Z, 1338-1359Z, 1946Z, 2115Z,
                       2155-2204Z: Scattered spurious echo patches.
                             ----> Corrected.
 
            % of data reprocessed:  10/144 = 7%  

**************************************************************************
 
20 Sep 99:  Dry conditions.  Strange echoes again to ENE after sea 
            breeze front passes.  
 
            Data processed: 0007-2345Z
 
            Sat. Coincidence: 0057Z(522 km), 0234Z(315 km), 0410Z(630 km),
                              0547Z(360 km), 0724Z(440 km)
 
            QC notes:
                       0007-1457Z: Scattered AP, CAE, & other
                                   assorted forms of spurious echo.
                             ----> Corrected.

                       1737-2334Z: Same as previous period.  Strange
                                   streamer-like echo to ENE flares
                                   up after sea breeze front passage.
                                   Considered non-precipitating 
                                   & thus removed.

            % of data reprocessed:  125/143 = 87% 

**************************************************************************
 
21 Sep 99:  A few showers between 08-10Z in N half of radar scope. 
 
            Data processed: 0004-2352Z
 
            Sat. Coincidence: 0121Z(7 km), 0258Z(563 km), 0435Z(549 km)
                              0611Z(35 km)
 
            QC notes:
                       0004-0800Z: AP, sometimes intense and 
                                   widespread.
                             ----> Corrected.

                       0805-1025Z: Light showers + spurious echo
                                   of various intensities. 
      2A, 2B !!FLAG!!        ----> Improvements made in most
                                   VOSs, but still some light
                                   contamination in a few
                                   VOSs, and intense AP specks
                                   near 09Z.

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

                       1504-2016Z: Light CAE specks.
                             ----> Corrected. 

                            2046Z: Light CAE specks.
                             ----> Corrected. 

                       2105-2125Z: Light echo to E.
                             ----> Corrected. 

                            2144Z: Same as previous period.
                             ----> Corrected. 

                            2224Z: Same as previous.
                             ----> Corrected. 

                       2244-2303Z: Same as previous.
                             ----> Corrected. 

            % of data reprocessed:  152/xx5 = xx% 

**************************************************************************
 
22 Sep 99:  A patch of showers skirts the SW edge of 150 km range 
            ring from 11-15Z.
 
            Data processed: 0013-2345Z
 
            Sat. Coincidence: 0009Z(389 km), 0145Z(388 km), 0322Z(628 km),
                              0459Z(283 km), 0635Z(578 km)
 
            QC notes:
                       0250-0300Z: Light CAE to WNW. 
                             ----> Corrected.

                       0339-0349Z: Same as previous.
                             ----> Corrected. 

                       0439-0449Z: Same as previous.
                             ----> Corrected. 

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

                       1154-1229Z: CAE to SW + light showers. 
                             ----> Corrected.

                            1238Z: CAE to NW + light showers.
                             ----> Corrected.

                            1249Z: Same as previous.
                             ----> Corrected.

                       1259-1309Z: Same as previous.
                             ----> Corrected.

                       1329-1334Z: CAE to N + light showers.  
                             ----> Corrected.

                            1344Z: Same as previous.
                             ----> Corrected.

                       1413-1418Z: CAE to NE + light showers. 
                             ----> Corrected.

                       1449-1744Z: CAE to NE, no precip w/in 150 km.
                             ----> Corrected. 

                       1805-1824Z: Same as previous. 
                             ----> Corrected. 

                       1859-2018Z: Scattered light spurious echo. 
                             ----> Corrected. 

                       2058-2117Z: Same as previous.
                             ----> Corrected. 
 
 
            % of data reprocessed:  75/198 = 38% 

**************************************************************************
 
23 Sep 99:  Dry. 
 
            Data processed: 0005-2358Z
 
            Sat. Coincidence: 0033Z(109 km), 0210Z(595 km), 0346Z(503 km),
                              0523Z(148 km), 2320Z(263 km)
 
            QC notes:
                       0153-0917Z: Scattered light to intense
                                   spurious echo patches.
                             ----> Corrected.

                            0956Z: Same as previous.
                             ----> Corrected. 
 
                       1056-1125Z: Intense AP to N.
                             ----> Corrected. 

                       1154-1419Z: Intense AP + some scattered
                                   light stuff.
                             ----> Corrected. 

                       1549-1608Z: Light contamination to NE.
                             ----> Corrected. 

                            1628Z: Same as previous.
                             ----> Corrected. 
                                   
            % of data reprocessed:  70/145 = 48% 

**************************************************************************
 
24 Sep 99:  Dry conditions persist.
 
            Data processed: 0005-2355Z
 
            Sat. Coincidence: 0057Z(450 km), 0234Z(616 km), 0410Z(200 km),
                              0547Z(717 km), 2208Z(718 km), 2344Z(199 km)
 
            QC notes:
                            0404Z: AP speck to W.
                             ----> Corrected.
                             
 
            % of data reprocessed:   1/142 =  0% 

**************************************************************************
 
25 Sep 99:  Precip moves in from N/NW after 08Z.  Small lines/segments
            of light to moderate precip (w/ some intense convective cores) 
            rotate  through radar scope from 08-23Z.  Not a widespread
            precip event, but it breaks the persistent dry pattern of
            the past few days.
 
            Data processed: 0016-2359Z
 
            Sat. Coincidence: 0121Z(616 km), 0257Z(451 km), 0434Z(262 km),
                              2231Z(148 km)
 
            QC notes:
                       1319-1405Z: AP + precip.
                             ----> Corrected.
 
                       1430-1435Z: Light spurious echo to S + precip.
                             ----> Corrected.  
                       
 
            % of data reprocessed:  12/243 = 5% 

**************************************************************************
 
26 Sep 99:  Precip most of the day.  Mostly small showers before 07Z.
            After 07Z, a few small convective segments form that
            contain briefly intense precipitation.  Precip becomes
            more scattered in nature over NE sector after 15Z. 
 
            Data processed: 0004-2359Z
 
            Sat. Coincidence: 0008Z(503 km), 0145Z(595 km), 0321Z(109 km),
                              2119Z(577 km), 2256Z(284 km) 
 
            QC notes:
                       0507Z, 0517ZZ: Light AP specks to WSW.
                             ----> Corrected.

                       0527-0542Z: Light to intense small AP
                                   specks to WSW + precip.
     2A, 2B !!FLAG!!         ----> Some improvements made,
                                   but some small specks 
                                   persist.  QC very delicate
                                   during this time period
                                   because of small, fairly
                                   shallow precip.  

                       0557-0607Z: Same as previous period.
                             ----> Corrected. 

                            0919Z: Same as previous.
                             ----> Corrected.

                            0949Z: Same as previous.
                             ----> Corrected.

                       1014-1028Z: AP specks to NW.
         2B !!FLAG!!         ----> Still a few very small
                                   specks hanging around. 

                       1038-1043Z: Same as previous.
         2B !!FLAG!!         ----> Same as previous, but
                                   most intense specks 
                                   removed.

                       1055-1209Z: Same as previous.
         2B !!FLAG!!         ----> Same as previous.

                       2052-2223Z: Strange echo to E near 100 km.  
                             ----> Corrected.  Echo in question
                                   begins as a  point source, 
                                   looks like a smoke stack, and
                                   forms near 20Z...similar to
                                   other occurences of this
                                   strange echo.  Echo is fully
                                   removed w/o significantly
                                   affecting precip echoes. 
 
            % of data reprocessed:  52/282 = 18%  


**************************************************************************
 
27 Sep 99:  Isolated to scattered precip after 06Z steadily marches from
            SE to NW throughout the day.  A few cells are briefly
            heavy before dissipating.  TRMM overpass near 2143Z may
            capture a small multicell complex to the W of the radar. 
 
            Data processed: 0004-2358Z
 
            Sat. Coincidence: 0032Z(628 km), 0209Z(387 km), 0346Z(390 km),
                              2143Z(35 km), 2320Z(549 km)

            OVERPASS CASE:  Orbit: 10550, Time: 2143Z, Distance:  35 km
                            small multicell to W of radar potentially
                            captured by PR.
            QC notes:
                       0354Z, 0414-0424Z: Light CAE or AP patches to NW.
                             ----> Corrected.
 
 
            % of data reprocessed: 3/257 = 1%  


**************************************************************************
 
28 Sep 99:  Scattered convection moves in from SW again after 01Z.
            Precip gradually builds in areal coverage as a few
            convective clusters form.   A few clusters later in
            the day develop decent stratiform shields.  By
            far, the most significant precip event in the past 
            couple of weeks.  TRMM overpass near 0233Z caputres
            a few scattered cells in SE sector.   
 
            Data processed: 0003-2349Z
 
            Sat. Coincidence: 0057Z(563 km), 0233Z(7 km), 2031Z(442 km),
                              2207Z(359 km), 2344Z(630 km) 

            OVERPASS CASE:  Orbit: 10553, Time: 0233Z, Distance:  7 km
                            a few cells in SE sector of radar scope
                            captured by PR

            QC notes:
                       0932-16597Z: A few holes punched in precip  
                                    to E of radar by defaults.
                             ---->  Most holes corrected, but
                                    a few VOSs have embedded
                                    clutter specks or light
                                    spurious echo problems. 
          2B !!FLAG!!        ====>  0932-0952Z: Light patches
                                    of possible spurious echo
                                    to W and NW.
          2B !!FLAG!!        ====>  1007Z: Same as previous period.
          2B !!FLAG!!        ====>  1303-1324Z: Same as previous.
          2A, 2B !!FLAG!!    ====>  1530-1555Z: Clutter speck embedded
                                    in precip to NW.
          2A !!FLAG!!        ====>  1727-1732Z: Embedded clutter speck.
          2A !!FLAG!!        ====>  1832Z: Same as previous.
      1A, 2A !!FLAG!!        ====>  2117-2223Z: Same as previous. 
 
            % of data reprocessed:  90/284 = 32%  


**************************************************************************
 
29 Sep 99:  Excellent day for precip.  Convective clusters to NW and SW
            & stratiform region to E at 00Z.  Convection to SW moves
            to NNE, constantly regenerating a N-S oriented convective
            line and a large trailing stratiform region.  By 06Z, a 
            convective line (oriented NE-SW) moves in from N and NW,
            eventually clashing with the pre-existing convective cluster  
            that originated in the SE sector early in the day.  By
            10Z, a large swath of precip extends across the radar
            scope...mostly stratiform w/ some intense embedded 
            convective cores.  By 15Z, most of the convection
            has ceased, leaving behind a broad region of light to
            moderate stratiform in the S half of the scope.  The
            stratiform shield gradually dissipates/moves off by
            22Z
 
            Data processed: 0000-2348Z
 
            Sat. Coincidence: 0121Z(315 km), 0257Z(521 km), 2054Z(67 km),
                              2231Z(583 km) 
 
            QC notes:  0441-1459Z: Perhaps some CAE mixed in w/ precip.
                                   Algorithm seems to do decent job
      1B, 2B !!FLAG!!              with the most obvious CAE, but
      1A, 2A !!FLAG!!              there may be some light patches
                                   of contamination. 
                                   Also some VOSs w/ intense, small
                                   embedded clutter specks.  Also
                                   appears to be some holes punched
                                   in precip by default params,
                                   but this problem is largely
                                   corrected.

                       1737Z, 1757-2022Z, 2042Z:  CAE to NE, +
                                   light precip to SSE.
                            ---->  Corrected.

            % of data reprocessed:  114/277 = 41%
                        
**************************************************************************
 
30 Sep 99:  Dry. 
 
            Data processed: 0023-2349Z
 
            Sat. Coincidence: 0008Z(524 km), 0144Z(98 km), 1942Z(318 km),
                              2118Z(424 km), 2255Z(622 km)
 
            QC notes:  0339-0737Z: AP & CAE. 
                            1304Z: CAE specks.
                            1335Z: CAE specks. 
                       1434-2221Z: CAE patches.
                             --->  All problems corrected. 


            % of data reprocessed:  75/143 = 52%*