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%