Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 5, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Apr 23, 2001, 11:35 PM CDT for 4 counties in Texas. It was in force for 55 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 23, 2001, 11:35 PM CDT (04:35 UTC)
- Expired
- Apr 24, 2001, 12:30 AM CDT
- In force
- 55 min
- Issued by
- NWS Brownsville, TX
- Area
- Whole counties
Counties Cameron County, TX, Hidalgo County, TX, Kenedy County, TX, Willacy County, TX
The radar
The Brownsville radar (KBRO), 70 km from the middle of the area, began a volume at 04:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 24, 12:20 AM CDT | Hail 0.75 | Edcouch, TX |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 4.6 hours before the alert went out and 73 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2100 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KBRO 240436 SVRBRO TXC061-215-261-489-240530- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BROWNSVILLE TX 1135 PM CDT MON APR 23 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN CAMERON COUNTY IN DEEP SOUTH TEXAS HIDALGO COUNTY IN DEEP SOUTH TEXAS WESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS SOUTHERN KENEDY COUNTY IN DEEP SOUTH TEXAS * UNTIL 1230 AM CDT * AT 1134 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 21 MILES NORTHWEST OF RAYMONDVILLE TO 14 MILES NORTH OF ELSA TO 8 MILES NORTHEAST OF EDINBURG TO ALTON...MOVING EAST AT 20 MPH. THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE HAIL TO THE SIZE OF NICKELS... AND WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORMS WILL BE NEAR... EDINBURG BY 1150 PM CDT. LOPEZVILLE BY MIDNIGHT CDT. ELSA BY 1210 AM CDT. EDCOUCH...RAYMONDVILLE BY 1215 AM CDT. LA VILLA...LYFORD BY 1220 AM CDT. SEBASTIAN BY 1225 AM CDT. OTHER LOCATIONS IN THE PATH OF THESE STORMS INCLUDE...PALMHURST AND SAN PERLITA. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WINDS...LARGE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING...AND VERY HEAVY RAIN ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. $$ LAT...LON 2679 9813 2627 9845 2613 9785 2670 9752 SPEECE/WATKINS
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 9:35 PM CDT, 2 hours earlier.
Area forecast discussion, Apr 23, 9:35 PM CDT, 2 hours before
DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 935 PM CDT MON APR 23 2001 SHORT TERM...KBRO RADAR SHOWS A BKN LINE OF CONV FORMING UP ALONG AND TO THE SOUTH AND EAST OF THE COLD FRONT EXTENDING SOUTHWEST FROM LA ROUGHLY PARRALELING THE TX COASTLINE. THIS LINE HAS FORMED OVER JIM HOGG...NE STARR AND W HIDALGO COUNTIES WITH THE LINE MOVING LITTLE WITH CELLULAR MOVEMENT TO THE N-NW AT 5 TO 10 MPH. THE STRONGEST CELL IS NOW LOCATED OVER NW HIDALGO COUNTY. MSAS LIS SHOWS THE MOST UNSTABLE AIR (AROUND -8) ALONG THE COASTAL AREAS WITH MORE STABLE LIS (NEAR -4) OVER ZAPATA COUNTY. WITH THE LOSS OF THE AFTERNOON HEATING...AND THE LACK OF A GOOD UPPER LEVEL WIND ENVIRONMENT...IT APPEARS THAT THE MAIN THREAT HAS SHIFTED AWAY FROM SVR WX TOWARDS A POSSIBLE HVY RAIN EVENT DUE TO THE SLOW MOVEMENT OF THE CELLS. HOWEVER...THE WIDELY SCT TO SCT NATURE OF THE CELLS DO NOT APPEAR TO WARRENT A FLOOD/FLASH FLOOD WATCH ATTM. IN ADDITION FLASH FLOOD TREASHOLDS OVER THE CWA REMAIN FAIRLY HIGH DUE TO THE DRY SOIL CONDITIONS OVER THE FORECAST AREA. RUC AND MESO-ETA DATA SHOW GOOD 5H PVA PERSISTING OVER THE CWA WITH THE BEST PVA EVIDENT FROM 06-12Z TUES MORNING AS THE SURFACE FRONT PUSHES THROUGH THE REGION. THIS WILL MAINTAIN THE BEST CONV CHCS MAINLY AFTER MIDNIGHT. OVERALL...CURRENT FORECAST WORDING LOOKS GOOD WITH NO CHANGES REQUIRED ATTM. MARINE...BOY020 REPORTS SWELLS OF 6 TO 7 FT WITH SE WINDS FROM 10 TO 15 KTS. MTRPIL CHECKS IN WITH A SE WIND FROM 10 TO 15 KTS. THIS IS REFLECTED WELL IN THE CURRENT CWF AND WILL MAINTAIN THIS WORDING ATTM. SYNOPTIC/MARINE/AVIATION...60/MESO...WATKINS INTERNET ADDRESS...WWW.SRH.NOAA.GOV/BRO .BRO...NONE. @ RUKWBCe&KDENFXUS64 KBRO 240237 AFDBRO DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 935 PM CDT MON APR 23 2001 SHORT TERM...KBRO RADAR SHOWS A BKN LINE OF CONV FORMING UP ALONG AND TO THE SOUTH AND EAST OF THE COLD FRONT EXTENDING SOUTHWEST FROM LA ROUGHLY PARRALELING THE TX COASTLINE. THIS LINE HAS FORMED OVER JIM HOGG...NE STARR AND W HIDALGO COUNTIES WITH THE LINE MOVING LITTLE WITH CELLULAR MOVEMENT TO THE N-NW AT 5 TO 10 MPH. THE STRONGEST CELL IS NOW LOCATED OVER NW HIDALGO COUNTY. MSAS LIS SHOWS THE MOST UNSTABLE AIR (AROUND -8) ALONG THE COASTAL AREAS WITH MORE STABLE LIS (NEAR -4) OVER ZAPATA COUNTY. WITH THE LOSS OF THE AFTERNOON HEATING...AND THE LACK OF A GOOD UPPER LEVEL WIND ENVIRONMENT...IT APPEARS THAT THE MAIN THREAT HAS SHIFTED AWAY FROM SVR WX TOWARDS A POSSIBLE HVY RAIN EVENT DUE TO THE SLOW MOVEMENT OF THE CELLS. HOWEVER...THE WIDELY SCT TO SCT NATURE OF THE CELLS DO NOT APPEAR TO WARRENT A FLOOD/FLASH FLOOD WATCH ATTM. IN ADDITION FLASH FLOOD TREASHOLDS OVER THE CWA REMAIN FAIRLY HIGH DUE TO THE DRY SOIL CONDITIONS OVER THE FORECAST AREA. RUC AND MESO-ETA DATA SHOW GOOD 5H PVA PERSISTING OVER THE CWA WITH THE BEST PVA EVIDENT FROM 06-12Z TUES MORNING AS THE SURFACE FRONT PUSHES THROUGH THE REGION. THIS WILL MAINTAIN THE BEST CONV CHCS MAINLY AFTER MIDNIGHT. OVERALL...CURRENT FORECAST WORDING LOOKS GOOD WITH NO CHANGES REQUIRED ATTM. MARINE...BOY020 REPORTS SWELLS OF 6 TO 7 FT WITH SE WINDS FROM 10 TO 15 KTS. MTRPIL CHECKS IN WITH A SE WIND FROM 10 TO 15 KTS. THIS IS REFLECTED WELL IN THE CURRENT CWF AND WILL MAINTAIN THIS WORDING ATTM. SYNOPTIC/MARINE/AVIATION...60/MESO...WATKINS INTERNET ADDRESS...WWW.SRH.NOAA.GOV/BRO .BRO...NONE.
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:47 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Kenedy | 58 min |
| Apr 23, 10:08 PM CDT | Severe Thunderstorm Warning | BRO | Brooks | 52 min |
| Apr 23, 10:39 PM CDT | Severe Thunderstorm Warning | BRO | Hidalgo, Starr | 66 min |
| Apr 23, 11:05 PM CDT | Flash Flood Warning | BRO | Brooks | 3 hr |
| Apr 24, 12:33 AM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Kenedy, Willacy | 57 min |
| Apr 24, 1:34 AM CDT | Severe Thunderstorm Warning | BRO | Kenedy, Willacy | 56 min |
| Apr 24, 1:34 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 56 min |
| Apr 24, 2:41 AM CDT | Severe Thunderstorm Warning | BRO | Cameron, Willacy | 64 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.