Site log - Hstn (Feb 1999)

Flags:

1-Satellite coincidence data
2-Scan in TSDIS data
A-Major problem (moderate to strong AP &/or widespread coverage)
B-Minor problem (weak AP &/or very little coverage)

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

01 Feb 99:    A day free of precip related echo. 
              
              Data Analyzed:  0028-2350Z
                              
              Satellite Coincidence:  0202Z (172 km), 0339Z (611 km), 0516Z (469 km),
                                      0652Z (226 km)
              
              QC notes:  

                              1326Z:  AP SW of radar  
                              ----->  corrected

                              1505Z:  AP SW of radar
                              ----->  corrected

                              1911Z:  AP SE of radar
                              ----->  corrected


              % of data reprocessed:  3/143 = 2.1%
*******************************************************************************

02 Feb 99:    Some very light echoes throughout the day.  Nothing
              of any significance, though.

              Data Analyzed:  0010-2358Z

              Satellite Coincidence:  0050Z (182 km), 0226Z (488 km), 0403Z (603 km),
                                      0540Z (138 km), 2338Z (619 km)

              QC notes:

                              0508Z:  AP NE of radar
                              ----->  corrected

                              0757Z:  Questionable echo S of radar,  Could
    2B !!FLAG!!                       be very light precip echo, or maybe 
                                      light chaff remnants.  Calling it 
                                      light precip w/ a degree of uncertainty.
                              RANGE:  near 125 km.

                        0817Z-1026Z:  Same as 0757, to S/SE.
    2B !!FLAG!!               ----->  Flagged for uncertainty.
                              RANGE:  between 100-150 km.

                              1136Z:  Same as previous problem.
    2B !!FLAG!!               ----->  Flagged for uncertainty.
                              RANGE:  near 150 km.

                        1502Z-1536Z:  AP W-E of radar
                              ----->  corrected

                              1627Z:  AP NNE of radar
                              ----->  corrected

                        1758Z-2239Z:  AP E of radar
                              ----->  corrected

                        2257Z-2307Z:  AP E of radar
                              ----->  corrected

                        2316Z-2341Z:  AP E of radar
                              ----->  corrected

                              2353Z:  AP SW of radar
                              ----->  corrected
                              
              ***Note:  The problem on this day is identifying whether
                        light echoes are precip-related or not...looking
                        at synoptic map, there's a frontal passage near
                        12Z on this day, so I'm more inclined to think that
                        the light echoes are precip/virga instead of chaff
                        or clear air echo.
            
              % of data reprocessed:  77/208 = 37%
*******************************************************************************
                     
03 Feb 99:    Convective activity builds in from the south after 11Z and moves
              from SW to NE until around 19Z

              Data Analyzed:  0004-1953Z, 2106-2345Z

              Satellite Coincidence:  0114Z (259 km), 0251Z (626 km), 0427Z (408 km),
                                      0604Z (351 km)

              QC notes:

                        0009Z-0456Z:  Scattered AP...also echoes removed by
                                      defaults in the second tilt.
                              ----->  corrected

                        0639Z-0855Z:  Scattered light echoes...are they real?
  1B, 2B !!FLAG!!             ----->  Echoes left intact, although defaults
                                      remove some of the lightest echoes.
                                      This is a similar situation to 02 Feb 99.
                                      Time period flagged since there is some
                                      uncertainty as to whether the echoes
                                      are precip, false echo, or virga.  
                                      A front is sitting to the SE over the Gulf,
                                      so it is plausible that these echoes are
                                      caused by the synoptic system.  IR satellite
                                      confirms clouds/moisture in the region.                                                             

  2B         !!FLAG!!   0905Z-1024Z:  AP to SW w/ precip.  AP is generally light
                                      and not widespread inside 150 km range.
                              RANGE:  Generally outside of 130 km. 

  2B         !!FLAG!!   1251Z-1331Z:  AP w/precip, partially corrected, earns
                                      minor flag.
                              RANGE:  Near 150 km.
                                                                                                          
                        0649Z-1050Z:  On second review, second tilt images 
                                      show many chunks taken out by defaults.
                              ----->  corrected
                              
                        1336Z-1441Z:  Same as 0649-1050Z.
                              ----->  corrected             


              % of data reprocessed:  115/232 = 50%
*******************************************************************************
                     
04 Feb 99:    A line of showers develops east of the radar after 7Z. Lines of
              showers continue to form to the east with some embedded convection
              and eventually move to the SW, pivoting around the radar site. This
              activity diminishes by 20Z.

              Data Analyzed:  0005-2349Z

              Satellite Coincidence:  0002Z (66 km), 0138Z (537 km), 0315Z (574 km),
                                      0452Z (37 km), 2249Z (478 km)

              QC notes:

                        2045Z-2135Z:  AP E of radar
                              ----->  corrected

                        2229Z-2234Z:  AP SE of radar
                              ----->  corrected

              % of data reprocessed:  13/229 = 6%
*******************************************************************************

05 Feb 99:    One band of showers enters region from SW after 3Z and moves north,
              dissipating by 10Z. Scattered showers redevelop after 18Z and also
              move north the remainder of the day.

              Data Analyzed:  0038-2359Z (Bad Scan at 0038 & 2358Z)

              Satellite Coincidence:  0026Z (340 km), 0203Z (631 km), 0339Z (336 km),
                                      0516Z (485 km), 2313Z (42 km)

              QC notes:

                        0041Z-0214Z:  AP E of radar
                              ----->  corrected

                        0224Z-0234Z:  AP E of radar
                              ----->  corrected

                              0244Z:  AP E of radar
                              ----->  corrected
                        
                        0254Z-0319Z:  AP E-W of radar 
                              ----->  corrected

                        0324Z-0353Z:  AP to W w/ precip moving in from S.
                              ----->  corrected
                              
                        0358Z-0403Z:  Same as previous period.
  1B         !!FLAG!!         ----->  Cannot remove all of the AP w/o removing
                                      precip.
                              RANGE:  near 150 km.
                                    
                        0408Z-0429Z:  Same as previous period.
  1A,2A      !!FLAG!!         ----->  AP a bit more intense, thus flagged as
                                      a major problem. 
                              RANGE:  130-150 km.                    

  1B,2B      !!FLAG!!   0434Z-0509Z:  Same as previous period, but AP not as 
                                      intense inside 150 km.
                              RANGE:  125-150 km.

  1A,2A      !!FLAG!!   0514Z-0519Z:  AP of greater intensity W of radar
                              RANGE:  near 150 km.
                              
  1B,2B      !!FLAG!!   0524Z-0539Z:  AP W of radar w/precip
                              RANGE:  near 150 km.
  
                        0544Z-0604Z:  AP W of radar.
                              ----->  corrected

                        0710Z-1005Z:  Lighter shower activity eliminated by defaults
                              ----->  corrected

                        1741Z-2349Z:  Lighter shower activity eliminated by defaults
                              ----->  corrected

              % of data reprocessed:  166/274 = 61%
*******************************************************************************

06 Feb 99:    There are two periods of very light shower activity on this date -
              the first from 0-4Z and the second from 17-21Z.

              Data Analyzed:  0005-2350Z

              Satellite Coincidence:  0050Z (575 km), 0227Z (535 km), 0403Z (71 km),
                                      2201Z (346 km), 2337Z (410 km)

              QC notes:

                        0005Z-0405Z:  Lighter shower activity eliminated by defaults
                              ----->  corrected

                        1648Z-2054Z:  Lighter shower activity eliminated by defaults
                              ----->  corrected

              % of data reprocessed:  92/203 = 45%
*******************************************************************************

07 Feb 99:    Very light isolated showers occur primarily before 330Z and again
              between 1130 and 1430Z

              Data Analyzed:  0004-2343Z (Bad Scan at 0004Z)

              Satellite Coincidence:  0114Z (625 km), 0251Z (256 km), 0427Z (624 km),
                                      2225Z (142 km)

              QC notes:

                        1903Z-2152Z:  AP E of radar
                              ----->  corrected

              % of data reprocessed:  18/190 = 9.5%
*******************************************************************************

08 Feb 99:    A day free of precip related echo.

              Data Analyzed:  0003-2359Z

              Satellite Coincidence:  0002Z (604 km), 0139Z (486 km), 0315Z (188 km),
                                      2113Z (219 km), 2249Z (472 km)

              QC notes:

                              0450Z:  AP NW of radar
                              ----->  corrected

              % of data reprocessed:  1/145 = 0.7%
*******************************************************************************

09 Feb 99:    Light echoes streak by after 04Z, mostly outside 150 km range.

              Data Analyzed:  0010-2357Z

              Satellite Coincidence:  0026Z (610 km), 0203Z (166 km), 2001Z (662 km),
                                      2137Z (234 km), 2314Z (622 km)

              QC notes:

              % of data reprocessed:  0/191 = 0%
*******************************************************************************

10 Feb 99:    Echo free day.

              Data Analyzed:  0012-2353Z

              Satellite Coincidence:  0050Z (427 km), 0227Z (311 km), 2024Z (102 km),
                                      2201Z (523 km), 2338Z (584 km)

              QC notes: None

              % of data reprocessed:  0/165 = 0%
*******************************************************************************

11 Feb 99:    No significant precip echoes.

              Data analyzed:  0007-0645Z

              Satellite Coincidence:  0115Z (69 km), 1912Z (520 km), 2049Z (316 km),
                                      2225Z (630 km)

              QC notes:

                              0103Z:  AP N of radar
                              ----->  corrected

              % of data reprocessed:  1/52 = 2%
*******************************************************************************

12 Feb 99:    A day free of precip related echo.

              Data analyzed:  1739-2355Z

              Satellite Coincidence:  0002Z (358 km), 0139Z (444 km), 1936Z (11 km),
                                      2113Z (565 km), 2250Z (548 km)

              QC notes:

                              2038Z:  AP NW of radar
                              ----->  corrected

                              2217Z:  AP S of radar
                              ----->  corrected

              % of data reprocessed:  2/43 = 4.7%
*******************************************************************************

13 Feb 99:    A day free of precip related echo.

              Data analyzed:  0006-2358Z

              Satellite Coincidence:  0026Z (38 km), 1824Z (385 km), 2000Z (390 km),
                                      2137Z (628 km), 2314Z (281 km)

              QC notes:

                        0425Z-0818Z:  AP W of radar
                              ----->  corrected

                        0831Z-1510Z:  Intense, prolonged AP northern half of scope
                              ----->  corrected

                        2218Z-2241Z:  Strange echo E of radar.  Doesn't appear to
                                      be precip.  
                              ----->  corrected

                        2306Z-2329Z:  Same as previous period.
                              ----->  corrected

              % of data reprocessed:  120/229 = 52%
*******************************************************************************

14 Feb 99:    A day free of precip related echo.

              Data analyzed:  0011-2356Z

              Satellite Coincidence:  0050Z (581 km), 1848Z (111 km), 2025Z (596 km),
                                      2201Z (502 km), 2338Z (150 km)

              QC notes:

                              1317Z:  AP E of radar
                              ----->  corrected

                              2327Z:  AP N of radar
                              ----->  corrected

              % of data reprocessed:  2/218 = 1%
*******************************************************************************

15 Feb 99:    A day free of precip related echo.

              Data analyzed:  0017-2356Z

              Satellite Coincidence:  1736Z (258 km), 1912Z (453 km), 2049Z (615 km),
                                      2226Z (195 km)

              QC notes:       The following VOSs contain light spurious
                              echo specks that were easily corrected:                              

                              0017Z, 0145Z, 0412Z, 0512-0522Z, 1345Z,
                              1424Z, 1830Z, 1850Z

              % of data reprocessed:  9/145 = 6%
*******************************************************************************

16 Feb 99:    Very light showers E of radar moving to the North from 0630Z to
              1130Z. Other showers develop around 16Z and persist until 2130Z.

              Data analyzed:  0015-2350Z

              Satellite Coincidence:  0002Z (725 km), 1623Z (707 km), 1800Z (206 km),
                                      1936Z (617 km), 2113Z (446 km), 2250Z (272 km)

              QC notes:

                        0630Z-1126Z:  Light showers eliminated by default params
                              ----->  corrected

                              1433Z:  Brief light shower eliminated by defaults
                              ----->  corrected

                        1601Z-2100Z:  Light showers eliminated by default params
                              ----->  corrected

  1B,2B       !!FLAG!!  2105Z-2325Z:  A discontinuity of some sort occurs at 2105Z,
                                      introducing areas of AP to the images, even
                                      after applying the defaults. This situation
                                      persists for the remainder of the day. This has 
                                      been partially corrected, but not completely.
                                      Therefore, a flag is required.
                                      ****NOTE**** Reflectivity intensity seems to
                                      increase between 2100 & 2105Z in existing
                                      echoes....don't know why.
                              RANGE:  Not every VOS, but near 150 km when it
                                      shows up! 

    2A        !!FLAG!!  2330Z-2335Z:  Patches of intense AP remain even after
                                      modifying params
                              RANGE:  near 150 km.
                                      
    2B        !!FLAG!!        2340Z:  Minor flagging of AP
                              RANGE:  near 150 km. 

    2A        !!FLAG!!  2345Z-2350Z:  Major flagging of AP
                              RANGE:  near 150 km.

              % of data reprocessed:  116/179 = 65%
*******************************************************************************

17 Feb 99:    A major line of convection builds in from the west starting around
              4Z, passes over the radar site around 8Z, and moves out of the area
              by 15Z

              Data analyzed:  0006-2352Z (Bad Scan at 0623Z)

              Satellite Coincidence:  1647Z (138 km), 1824Z (507 km), 2001Z (593 km),
                                      2137Z (101 km)

              QC notes:

  2A          !!FLAG!!  0006Z-0031Z:  The discontinuity observed beginning on the
                                      prior day (16th) continues through this period.
                                      A correction to the defaults is applied but
                                      some specks of intense AP remain, enough to
                                      warrant the application of a major flag.
                              RANGE:  specks between 120-150 km.  Also potential
                                      embedded AP near 50 km to SW.

  2B          !!FLAG!!  0150Z-0206Z:  Small but intense patch of AP E of radar
                                      Partially corrected; 0200Z remains a problem,
                                      but that speck may be a small shower.
                              RANGE:  0206Z speck near 100 km.

  2A          !!FLAG!!  0236Z-0241Z:  Another instance of small but intense AP
                              RANGE:  near 120 km.

  2B          !!FLAG!!  0513Z-0607Z:  Potential light spurious echo E of radar
                              RANGE:  125-150 km.
                              
                              0623Z:  Appears to be a partial file with only
                                      4 tilts...two of the elevation angles
                                      are 1.5 degrees.  Not used in 1C.HDF file.
   
                        0638Z-0733Z:  Precip removed by defaults.
                               ---->  Corrected, but following VOSs have
                                      embedded clutter specks:
  2A          !!FLAG!!         ====>  0703Z-0718Z:  Clutter specks SW of radar
                                      RANGE:  inside 30 km.

  2A          !!FLAG!!  0754Z-0809Z:  Clutter specks SE of radar...also AP to NE.
                               ---->  AP mostly corrected, but not clutter specks.
                              RANGE:  Clutter w/in 25 km.

  2A          !!FLAG!!  1035Z-1040Z:  Clutter specks SE of radar
                              RANGE:  w/in 25 km.
  
                        After inspecting the second tilt images, the following
                        periods have precip echoes aloft removed by the defaults,
                        corrected by lowering the H3 parameter:
                        
                        0051-0135Z, 0226-0316Z, 0718-1427Z:  
                          

              % of data reprocessed:  118/237 = 50%
              
*******************************************************************************

18 Feb 99:    A day free of precip related echo.

              Data analyzed:  0003-2345Z

              Satellite Coincidence:  1535Z (568 km), 1711Z (289 km), 1848Z (629 km),
                                      2025Z (383 km), 2201Z (397 km)

              QC notes:

                        0033Z-0054Z:  AP NNE of radar
                              ----->  corrected

                              1637Z:  AP NE of radar
                              ----->  corrected

                              2145Z:  AP NW of radar
                              ----->  corrected

              % of data reprocessed:  4/156 = 2.6%
*******************************************************************************

19 Feb 99:    A day free of precip related echo.

              Data analyzed:  0004-1332Z, 1503-2345Z

              Satellite Coincidence:  1559Z (27 km), 1735Z (551 km), 1912Z (561 km),
                                      2049Z (0.3 km)

              QC notes:

                              0055Z:  AP NNE of radar
                              ----->  corrected

                        0204Z-0213Z:  AP W of radar
                              ----->  corrected

                        0233Z-0314Z:  AP W-E of radar
                              ----->  corrected

                        0333Z-0403Z:  AP W-E of radar
                              ----->  corrected

                        0422Z-0442Z:  AP E of radar
                              ----->  corrected

                        0523Z-0532Z:  AP E of radar
                              ----->  corrected

                              0552Z:  AP E of radar
                              ----->  corrected

                        0612Z-0635Z:  AP E of radar
                              ----->  corrected

                              0646Z:  AP SE of radar
                              ----->  corrected

                              0724Z:  AP W of radar
                              ----->  corrected

                              0742Z:  AP W of radar
                              ----->  corrected

                        0829Z-0835Z:  AP SE of radar
                              ----->  corrected

                              2046Z:  AP E of radar
                              ----->  corrected

              % of data reprocessed:  27/158 = 17%
*******************************************************************************

20 Feb 99:    After the ~8 hr data gap, a line of convection is observed moving
              from NW to SE across the site for the remainder of the day.

              Data analyzed:  0005-1412Z, 2205-2358Z (Bad scan at 2355Z)

              Satellite Coincidence:  1446Z (432 km), 1623Z (365 km), 1800Z (630 km),
                                      1936Z (310 km), 2113Z (531 km)

              QC notes:

                              0034Z:  AP SE of radar
                              ----->  corrected

                              0055Z:  AP SE of radar
                              ----->  corrected

                              0134Z:  AP NW of radar
                              ----->  corrected

                        0204Z-0214Z:  AP W of radar
                              ----->  corrected

                        0243Z-0314Z:  AP N-S of radar
                              ----->  corrected

                              0334Z:  AP S of radar
                              ----->  corrected

                        0413Z-0813Z:  AP NW of radar
                              ----->  corrected

                              0833Z:  AP W of radar
                              ----->  corrected

                        0852Z-0902Z:  AP NW of radar
                              ----->  corrected
                        
                              0923Z:  AP W of radar
                              ----->  corrected

                              0943Z:  AP NE of radar
                              ----->  corrected

                              1241Z:  AP ENE of radar
                              ----->  corrected

                              1412Z:  AP NW of radar
                             ----->  corrected
                             
                              2355Z:  Bad scan not used in 1C.HDF file.
                              

              % of data reprocessed:  40/105 = 38%
*******************************************************************************

21 Feb 99:    The primary band of showers observed after 22Z on the 20th continues
              its southward movement, clearing the region prior to data resumption
              around 6Z.

              Data analyzed:  0005-0307Z, 0555-1317Z

              Satellite Coincidence:  1510Z (75 km), 1647Z (586 km), 1824Z (520 km),
                                      2000Z (108 km)

              QC notes:

                        0005Z-0307Z:  Light showers eliminated by default params
                              ----->  corrected

   3B         !!FLAG!!        0307Z:  Radial spike infiltrates area of precip.,
                                      merits minor flag
                              RANGE:  near 150 km.

              % of data reprocessed:  32/86 = 37%
*******************************************************************************

22 Feb 99:    An echo free day.

              Data analyzed:  0028-1332Z, 2121-2351Z

              Satellite Coincidence:  1357Z (307 km), 1534Z (429 km), 1711Z (622 km),
                                      1847Z (231 km), 2024Z (667 km)

              QC notes: none

              % of data reprocessed:  0/96 = 0%
*******************************************************************************

23 Feb 99:    Bands of showers, mostly light with some more intense embedded cells
              move into the region after 9Z from the NW, moving to the SE and out
              of the region by 18Z.

              Data analyzed:  0020-2355Z

              Satellite Coincidence:  1422Z (170 km), 1558Z (610 km), 1735Z (469 km),
                                      1912Z (224 km)

              QC notes: 

   2B         !!FLAG!!  0900Z-1400Z:  Small showers eliminated by defaults during
                                      this period, however attempting to restore
                                      showers introduced clutter so defaults remain
                                      as is.  Not a major problem at all.

                        1758Z-1818Z:  AP E of radar
                              ----->  corrected

                              1828Z:  AP E of radar
                              ----->  corrected

                              1838Z:  AP E of radar
                              ----->  corrected

                        1848Z-2038Z:  AP E of radar
                              ----->  corrected

                        2053Z-2119Z:  AP NE of radar
                              ----->  corrected

                        2129Z-2139Z:  AP N of radar
                              ----->  corrected

                              2149Z:  AP SE of radar
                              ----->  corrected

                              2224Z:  AP NE of radar
                              ----->  corrected

                              2334Z:  AP E of radar
                              ----->  corrected

                              2343Z:  AP SSW of radar
                              ----->  corrected

              % of data reprocessed:  43/207 = 21%
*******************************************************************************

24 Feb 99:    A day free of precip related echo.

              Data analyzed:  0007-2343Z

              Satellite Coincidence:  1309Z (183 km), 1446Z (488 km), 1623Z (603 km),
                                      1759Z (138 km)

              QC notes:

                        0007Z-0119Z:  AP W-E of radar
                              ----->  corrected

                              0145Z:  AP E of radar
                              ----->  corrected

                              0157Z:  AP E of radar
                              ----->  corrected

                        0210Z-0216Z:  AP W-E of radar
                              ----->  corrected

                        0242Z-0259Z:  AP SW of radar
                              ----->  corrected

                        0315Z-0603Z:  AP W-E of radar
                              ----->  corrected

                              0624Z:  AP E of radar
                              ----->  corrected

                              0653Z:  AP SE of radar
                              ----->  corrected

                        0713Z-0812Z:  AP SW of radar
                              ----->  corrected

                        0852Z-1508Z:  AP W-E of radar
                              ----->  corrected

                              1528Z:  AP E of radar
                              ----->  corrected

                              2054Z:  AP NW of radar
                              ----->  corrected

                        2312Z-2322Z:  AP NW of radar
                              ----->  corrected

              % of data reprocessed:  91/155 = 59%
*******************************************************************************

25 Feb 99:    Very light showers enter from south after 1830Z and persist for
              rest of day.

              Data analyzed:  0002-2354Z

              Satellite Coincidence:  1157Z (620 km), 1333Z (258 km), 1510Z (625 km),
                                      1647Z (408 km), 1823Z (349 km)

              QC notes:

                        0102Z-0240Z:  AP N of radar
                              ----->  corrected

                        0301Z-0330Z:  AP NW-NE of radar
                              ----->  corrected

                              0419Z:  AP NW-NE of radar
                              ----->  corrected

                        0439Z-0500Z:  AP NW of radar
                              ----->  corrected

                        0519Z-0558Z:  AP NW of radar
                              ----->  corrected

                              0628Z:  AP N of radar
                              ----->  corrected

                              0708Z:  AP NE of radar
                              ----->  corrected

                              0728Z:  AP NW of radar
                              ----->  corrected

                              0807Z:  AP NW of radar
                              ----->  corrected

                              1255Z:  AP NE of radar
                              ----->  corrected 

                        1315Z-1324Z:  AP W of radar
                              ----->  corrected

                              1355Z:  AP NE-W of radar
                              ----->  corrected

                        1415Z-1425Z:  AP NW-W of radar
                              ----->  corrected

                              1713Z:  AP NE of radar
                              ----->  corrected

  2A,2B       !!FLAG!!  1823Z-2354Z:  Light showers eliminated by defaults,
                                      some restored by altering params
                                      A few clutter specks show up at 1833Z
                                      and 1848-1903Z.
                               RANGE: Clutter generally w/in 30 km.

              % of data reprocessed:  101/177 = 57%
*******************************************************************************

26 Feb 99:    Light shower activity south of radar until ~4Z with a lull until
              ~11Z when more light activity redevelops, becoming more widespread
              and intense across the northern sector, diminishing by the end of
              the period.

              Data analyzed:  0010-2356Z

              Satellite Coincidence:  1221Z (70 km), 1357Z (535 km), 1534Z (575 km),
                                      1711Z (41 km)

              QC notes:             

  2B,3B       !!FLAG!!  0010Z-0230Z:  Tried to lower params to reinstate showers,
                                      effort failed thus the minor flag

                        1101Z-1956Z:  Light showers eliminated by defaults
                              ----->  corrected
                           
                        2230Z-2356Z:  Precip removed in second tilt.

              % of data reprocessed:  116/249 = 47%
*******************************************************************************
                                      
27 Feb 99:    Very light shower activity traverses region from SW to NE from
              0Z to 15Z. More intense convective lines move into scope from
              NW after 15Z and move off to the east through the remainder of
              the day.

              Data analyzed:  0004-2349Z (Bad scan at 0004Z)

              Satellite Coincidence:  1108Z (483 km), 1245Z (337 km), 1422Z (631 km),
                                      1558Z (338 km), 1735Z (480 km)

              QC notes: 

                        0006Z-1159Z:  Precip removed in second tilt.
                                      
     2B  !!FLAG!!             0953Z:  Light radial spike remnant to S.
                              RANGE:  near 100 km.
     
  1A, 1B !!FLAG!!       1736Z-1741Z:  Clutter speck to NW.
                              RANGE:  near 50 km.
                                               
              % of data reprocessed:  145/285 = 51%
*******************************************************************************
                                       
28 Feb 99:    Lines of convection sweep across region between 0Z and 5Z exiting 
              through the SE. Region is precip free thereafter.

              Data analyzed:  0006-2345Z (Bad scan at 0006Z)

              Satellite Coincidence:  1132Z (39 km), 1309Z (574 km), 1446Z (536 km),
                                      1622Z (68 km)

              QC notes:
                        0105Z-0115Z:  AP to SW, embedded in precip.
 2A          !!FLAG!!         ----->  Difficult to remove since most of it
                                      is embedded.
                              RANGE:  Embedded AP between 60-100 km.
                                      
                        0137Z-0217Z:  Same as previous period, only AP to E and
                                      non-embedded AP to W.
 2A, 2B      !!FLAG!!         ----->  Non-embedded AP is corrected.  Embedded AP
                                      is not.
                              RANGE:  Embedded AP 40-75 km.
 
                        0313Z-0328Z:  AP W of radar
                              ----->  corrected

                        0333Z-0508Z:  Large, intense splotches of AP W-E of radar
 2A          !!FLAG!!         ----->  Vast improvements made.  Period still flagged,
                                      though, due to either (1) small, intense AP
                                      specks that could not be removed, or (2) missing
                                      areas of light to moderate precip in the SE.
                                      The AP was so intense and widespread, though, 
                                      that removing it seemed a higher priority than
                                      keeping all of the light to moderate precip in
                                      the SE (especially when considering the rainmap
                                      that will be produced from this data).
                              RANGE:  AP specks/splotches scattered from 75-150 km.

                        0513Z-0644Z:  AP remains in absence of precip w/in 150 km.
                              ----->  corrected

                        0654Z-0659Z:  AP E of radar
                              ----->  corrected

                              0709Z:  AP E of radar
                              ----->  corrected

                              0719Z:  AP E of radar
                              ----->  corrected

                              0744Z:  AP E of radar
                              ----->  corrected

                              0809Z:  AP SW of radar
                              ----->  corrected

                              0820Z:  AP E of radar
                              ----->  corrected

                        0841Z-0901Z:  AP W-E of radar
                              ----->  corrected

                        0921Z-0931Z:  AP W of radar
                              ----->  corrected

                              0950Z:  AP SW of radar
                              ----->  corrected

                              1010Z:  AP SW of radar
                              ----->  corrected

                              1039Z:  AP E of radar
                              ----->  corrected

                              1110Z:  AP SW of radar
                              ----->  corrected

                              1140Z:  AP SW of radar
                              ----->  corrected

                              1229Z:  AP W of radar
                              ----->  corrected

                        1329Z-1339Z:  AP SW of radar
                              ----->  corrected

                        1418Z-1428Z:  AP W-E of radar
                              ----->  corrected

                        1956Z-2006Z:  AP E of radar
                              ----->  corrected

              % of data reprocessed:  86/192 = 45%
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