Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 37, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 8, 2002, 2:54 AM CDT for Guadalupe County, Texas. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2002, 2:54 AM CDT (07:54 UTC)
- Expired
- Apr 8, 2002, 3:45 AM CDT
- In force
- 51 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Guadalupe County, TX
The radar
The Austin/San Antonio radar (KEWX), 18 km from the middle of the area, began a volume at 07:55 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 7.9 hours before the alert went out and 214 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
- 2444 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 655 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 080754 SVRSAT TXC187-080845- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 254 AM CDT MON APR 8 2002 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... GUADALUPE * UNTIL 345 AM CDT * AT 254 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTH OF MARION...OR ABOUT 10 MILES SOUTHEAST OF SCHERTZ...MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES SOUTHEAST OF MARION AT 300 AM OVER SEGUIN AT 310 AM * THIS WARNING INCLUDES LOCATIONS IN AND AROUND... MARION MCQUEENEY SEGUIN LAT...LON 2955 9820 2941 9809 2954 9778 2968 9803
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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 8, 1:35 AM CDT, 1 hour 19 minutes earlier.
Area forecast discussion, Apr 8, 1:35 AM CDT, 1 hour 19 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 135 AM CDT MON APR 8 2002 UPDATED AND REALLIGNED ZONES FOR WATCH #77 VALID UNTIL 5 AM. BACKING BUILDING STORMS OVR THE S CNTRL CWA ALONG WEAK OUTFLOW BOUNDARY CONTG TO TRACK NEWD ACRS THE ERN CWA THIS MORNING. WITH TRAINING OF STORMS ACRS THE SERN COUNTIES...WILL ISSUE FFA THRU 10 AM. UNDER GOOD SUBSIDENSE BY 18Z AS THE UPR TROF AND DRY LINE MOV EAST. CDFNT TO PUSH SWD THRU CWA TONIGHT BUT STALLING ALONG THE COAST AS AN INVERTED TROF TUE. NEXT UPR LOW TO DIG INTO THE SW U.S./NRN MEX BY LATE THIS WEEK AND PUSHING EAST BY SUN. PRELIMINARY NUMBERS... AUS 84/57/78/54 5000 DRT 89/58/82/60 0000 SAT 85/58/80/57 5000 .EWX...FLASH FLOOD WATCH THRU 10 AM FOR MUCH OF THE ERN/SERN CWA.
In the hours before
Local storm report, Apr 7, 9:39 PM CDT, 5 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
939 PM CDT SUN APR 7 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0847 PM BIGFOOT TX TORNADO
04/07/02 FRIO REPORTED BY LAW
ENFORCEMENT
DCLocal storm report, Apr 7, 10:02 PM CDT, 4 hours 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1002 PM CDT SUN APR 7 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0945 PM FLORESVILLE TX 1.75 INCH HAIL
04/07/02 WILSON REPORTED BY LAW
ENFORCEMENT
DCLocal storm report, Apr 7, 10:55 PM CDT, 3 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1055 PM CDT SUN APR 7 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0830 PM 2.5 N DEVINE TX WIND DAMAGE
04/07/02 MEDINA TWO MOBILE HOMES
DESTROYED. VEHICLE PICKED
UP AND SLAMMED DOWN
REPORTED
BY LAW ENFORCEMENT
DCLocal storm report, Apr 8, 12:00 AM CDT, 2 hours 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1200 AM CDT MON APR 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1155 PM SHAVANO PARK SAN ANTONIO TX 1.75 INCH HAIL
04/07/02 BEXAR REPORTED BY LAW
ENFORCEMENT
DCLocal storm report, Apr 8, 2:00 AM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
200 AM CDT MON APR 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0830 PM YANCY TX TORNADO
04/07/02 MEDINA HWY 371
3 HOMES DESTROYED
REPORTED BY SHERIFF
0030 AM FLORESVILLE TX GOLFBALL SIZE HAIL
04/08/02 WILSON ON HWY 97,
REPORTED BY SHERIFF
0148 AM SAN ANTONIO TX GOLFBALL SIZE HAIL
04/08/02 BEXAR ON HWY PEARSALL AND
BLANCHER RD, SPOTTERLocal storm report, Apr 8, 2:49 AM CDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
200 AM CDT MON APR 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0830 PM YANCY TX TORNADO
04/07/02 MEDINA HWY 371
3 HOMES DESTROYED
REPORTED BY SHERIFF
0030 AM FLORESVILLE TX GOLFBALL SIZE HAIL
04/08/02 WILSON ON HWY 97,
REPORTED BY SHERIFF
0148 AM SAN ANTONIO TX GOLFBALL SIZE HAIL
04/08/02 BEXAR ON HWY PEARSALL AND
BLANCHER RD, SPOTTERThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 7:03 PM CDT | Tornado Warning | EWX | Uvalde | 57 min |
| Apr 7, 7:09 PM CDT | Tornado Warning | EWX | Medina | 66 min |
| Apr 7, 7:36 PM CDT | Tornado Warning | EWX | Frio | 54 min |
| Apr 7, 8:14 PM CDT | Tornado Warning | EWX | Medina | 31 min |
| Apr 7, 8:29 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 46 min |
| Apr 7, 8:29 PM CDT | Tornado Warning | EWX | Frio | 61 min |
| Apr 7, 8:36 PM CDT | Severe Thunderstorm Warning | EWX | Comal | 24 min |
| Apr 7, 8:40 PM CDT | Tornado Warning | EWX | Atascosa | 65 min |
| Apr 7, 9:18 PM CDT | Tornado Warning | EWX | Wilson | 57 min |
| Apr 7, 9:31 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 59 min |
| Apr 7, 10:15 PM CDT | Severe Thunderstorm Warning | EWX | Wilson | 60 min |
| Apr 7, 10:26 PM CDT | Flash Flood Warning | EWX | Frio | 3 hr |
| Apr 7, 10:31 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 59 min |
| Apr 7, 10:37 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 53 min |
| Apr 7, 10:55 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales | 65 min |
| Apr 7, 11:07 PM CDT | Flash Flood Warning | EWX | Atascosa | 6 hr |
| Apr 7, 11:25 PM CDT | Flash Flood Warning | EWX | Wilson | 6 hr |
| Apr 7, 11:29 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 46 min |
| Apr 7, 11:37 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 38 min |
| Apr 7, 11:59 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 46 min |
| Apr 8, 12:06 AM CDT | Severe Thunderstorm Warning | EWX | Wilson | 54 min |
| Apr 8, 12:13 AM CDT | Tornado Warning | EWX | Atascosa | 62 min |
| Apr 8, 12:23 AM CDT | Severe Thunderstorm Warning | EWX | Frio | 37 min |
| Apr 8, 12:31 AM CDT | Severe Thunderstorm Warning | EWX | Medina, Uvalde, Zavala | 59 min |
| Apr 8, 12:54 AM CDT | Tornado Warning | EWX | Frio | 36 min |
| Apr 8, 12:55 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kendall | 50 min |
| Apr 8, 1:00 AM CDT | Severe Thunderstorm Warning | EWX | Wilson | 45 min |
| Apr 8, 1:20 AM CDT | Tornado Warning | EWX | Atascosa, Frio, Medina | 55 min |
| Apr 8, 1:24 AM CDT | Flash Flood Warning | EWX | Medina | 111 min |
| Apr 8, 1:30 AM CDT | Severe Thunderstorm Warning | EWX | Bexar | 60 min |
| Apr 8, 1:50 AM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 40 min |
| Apr 8, 2:05 AM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Gonzales | 40 min |
| Apr 8, 2:08 AM CDT | Flash Flood Warning | EWX | Bexar, Guadalupe | 3 hr |
| Apr 8, 2:13 AM CDT | Tornado Warning | EWX | Bexar, Wilson | 47 min |
| Apr 8, 2:46 AM CDT | Severe Thunderstorm Warning | EWX | Caldwell | 59 min |
| Apr 8, 3:07 AM CDT | Flash Flood Warning | EWX | Caldwell | 2 hr |
| Apr 8, 3:11 AM CDT | Flash Flood Warning | EWX | Medina | 2 hr |
| Apr 8, 3:18 AM CDT | Flash Flood Warning | EWX | Medina | 117 min |
| Apr 8, 3:34 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 41 min |
| Apr 8, 4:13 AM CDT | Flash Flood Warning | EWX | Atascosa | 4 hr |
| Apr 8, 4:59 AM CDT | Flash Flood Warning | EWX | Bexar, Guadalupe | 2 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.