Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 27, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 4, 1997, 11:30 AM CST for Val Verde County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 4, 1997, 11:30 AM CST (17:30 UTC)
- Expired
- Apr 4, 1997, 12:30 PM CST
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 17:31 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.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 5.5 hours before the alert went out and 66 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
- 1922 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 2.5
- Supercell composite
- 10.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 041732 RRA SVRSAT TXC465-041830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1130 AM CST FRI APR 4 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...VAL VERDE COUNTY AT 1130 AM...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL JUST WEST OF HIGHWAY 1024 15 MILES NORTHWEST OF COMSTOCK. MOVEMENT WAS NORTHEAST AT 30 MPH. THIS STORM IS INTENSIFYING RAPIDLY AND WILL LIKELY MOVE BETWEEN PANDALE AND JUNO AS IT TRAVERSES THE COUNTY. SEVERE THUNDERSTORM WINDS CAN REACH SPEEDS OVVER 60 MPH. THESE WINDS BLOW DOWN TREES...POWER LINES...AND SEVERELY DAMAGE MOBILE HOMES... SOMETIMES BUILDINGS. VERY LARGE HAIL CAN INJURE ANYONE CAUGHT OUTSIDE.
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.
In the hours before
Special weather statement, Apr 4, 7:00 AM CST, 4 hours 30 minutes before
TXZ171>173-183>194-202>209-217>225-228-051200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 700 AM CST FRI APR 4 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH TODAY INTO THIS EVENING FOR ALL OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS. ...FLASH FLOOD WARNING IN EFFECT FOR LAVACA COUNTY UNTIL 845 AM... ...FLASH FLOOD WARNINGS FOR TRAVIS..BLANCO AND WILLIAMSON COUNTIES TIL 930 AM... ...FLASH FLOOD WARNING FOR KENDALL COUNTY TIL 945 AM... AN INTENSE UPPER LEVEL STORM SYSTEM MOVING INTO WEST TEXAS TODAY WILL TRIGGER NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS THE REGION. AVERAGE RAIN TOTALS IN THE REGION COULD AMOUNT TO BETWEEN 2 AND 3 INCHES BY THE TIME THE EVENT ENDS THIS EVENING. IN ADDITIONAL..THE UPPER LEVELS WILL RAPIDLY DESTABILIZE THIS AFTERNOON WITH SCATTERED TO NUMEROUS THUNDERSTORMS DEVELOPING ALONG A DRY LINE WHICH WILL PUSH ACROSS THE AREA THIS AFTERNOON AND EVENING. THESE STORMS WILL LIKELY EXCEED SEVERE LIMITS WITH LARGE HAIL AND DAMAGING THUNDERSTORM WINDS. AREAS WET FROM RECENT HEAVY RAINS ARE AT PRIME RISK OF FLOODING IF HEAVY RAIN DEVELOPS. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECASTS...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER NO LONGER IS EXPECTED.
Special weather statement, Apr 4, 7:01 AM CST, 4 hours 29 minutes before
TXZ171>173-183>194-202>209-217>225-228-051200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 700 AM CST FRI APR 4 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH TODAY INTO THIS EVENING FOR ALL OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS. ...FLASH FLOOD WARNING IN EFFECT FOR LAVACA COUNTY UNTIL 845 AM... ...FLASH FLOOD WARNINGS FOR TRAVIS..BLANCO AND WILLIAMSON COUNTIES TIL 930 AM... ...FLASH FLOOD WARNING FOR KENDALL COUNTY TIL 945 AM... AN INTENSE UPPER LEVEL STORM SYSTEM MOVING INTO WEST TEXAS TODAY WILL TRIGGER NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS THE REGION. AVERAGE RAIN TOTALS IN THE REGION COULD AMOUNT TO BETWEEN 2 AND 3 INCHES BY THE TIME THE EVENT ENDS THIS EVENING. IN ADDITIONAL..THE UPPER LEVELS WILL RAPIDLY DESTABILIZE THIS AFTERNOON WITH SCATTERED TO NUMEROUS THUNDERSTORMS DEVELOPING ALONG A DRY LINE WHICH WILL PUSH ACROSS THE AREA THIS AFTERNOON AND EVENING. THESE STORMS WILL LIKELY EXCEED SEVERE LIMITS WITH LARGE HAIL AND DAMAGING THUNDERSTORM WINDS. AREAS WET FROM RECENT HEAVY RAINS ARE AT PRIME RISK OF FLOODING IF HEAVY RAIN DEVELOPS. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECASTS...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER NO LONGER IS EXPECTED.
Special weather statement, Apr 4, 10:49 AM CST, 41 minutes before
TXZ171>173-183>194-202>209-217>225-228-051200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 11 AM CST FRI APR 4 1997 ...STORMY EARLY APRIL DAY OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS... AN INTENSE SPRING WEATHER SYSTME TO THE WEST OF THE AREA WILL MOVE EAST CAUSING MORE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS TODAY AND THIS EVENING. ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES IN SOME AREAS IS POSSIBLE BY THE TIME THE EVENT ENDS THIS EVENING. SEVERE THUNDERSTORMS MAY ALSO DEVELOP OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS TODAY AND THIS EVENING...CAUSING STRONG WINDS AND POSSIBLE DAMAGING HAIL. AS THE WEATHER SYSTEMS SWEEPS EAST OF THE AREA...A MOSTLY SUNNY DAY IS EXPECTED SATURDAY...FOLLOWED BY A SUNNY TO PARTLY CLOUDY ON SUNDAY.
Special weather statement, Apr 4, 11:00 AM CST, 30 minutes before
TXZ171>173-183>194-202>209-217>225-228-051200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 11 AM CST FRI APR 4 1997 ...STORMY EARLY APRIL DAY OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS... AN INTENSE SPRING WEATHER SYSTME TO THE WEST OF THE AREA WILL MOVE EAST CAUSING MORE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS TODAY AND THIS EVENING. ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES IN SOME AREAS IS POSSIBLE BY THE TIME THE EVENT ENDS THIS EVENING. SEVERE THUNDERSTORMS MAY ALSO DEVELOP OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS TODAY AND THIS EVENING...CAUSING STRONG WINDS AND POSSIBLE DAMAGING HAIL. AS THE WEATHER SYSTEMS SWEEPS EAST OF THE AREA...A MOSTLY SUNNY DAY IS EXPECTED SATURDAY...FOLLOWED BY A SUNNY TO PARTLY CLOUDY ON SUNDAY.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 8:33 PM CST | Flash Flood Warning | EWX | Dimmit | 42 min |
| Apr 3, 8:33 PM CST | Severe Thunderstorm Warning | EWX | Dimmit | 42 min |
| Apr 3, 9:18 PM CST | Severe Thunderstorm Warning | EWX | Medina, Zavala | 57 min |
| Apr 3, 10:36 PM CST | Flash Flood Warning | EWX | Gillespie | 69 min |
| Apr 3, 10:47 PM CST | Flash Flood Warning | EWX | Kerr | 58 min |
| Apr 3, 11:10 PM CST | Severe Thunderstorm Warning | EWX | Bexar | 65 min |
| Apr 3, 11:32 PM CST | Severe Thunderstorm Warning | EWX | Comal | 58 min |
| Apr 3, 11:55 PM CST | Severe Thunderstorm Warning | EWX | Hays | 65 min |
| Apr 4, 12:25 AM CST | Flash Flood Warning | EWX | Williamson | 65 min |
| Apr 4, 12:25 AM CST | Severe Thunderstorm Warning | EWX | Williamson | 65 min |
| Apr 4, 12:43 AM CST | Severe Thunderstorm Warning | EWX | Hays | 62 min |
| Apr 4, 1:17 AM CST | Flash Flood Warning | EWX | DeWitt, Lavaca | 3 hr |
| Apr 4, 1:34 AM CST | Flash Flood Warning | EWX | Travis, Williamson | 116 min |
| Apr 4, 5:36 AM CST | Flash Flood Warning | EWX | Lavaca | 3 hr |
| Apr 4, 6:23 AM CST | Flash Flood Warning | EWX | Travis, Williamson | 3 hr |
| Apr 4, 6:31 AM CST | Flash Flood Warning | EWX | Blanco | 3 hr |
| Apr 4, 6:43 AM CST | Flash Flood Warning | EWX | Kendall | 3 hr |
| Apr 4, 9:24 AM CST | Flash Flood Warning | EWX | Travis, Williamson | 3 hr |
| Apr 4, 10:12 AM CST | Flash Flood Warning | EWX | DeWitt | 2 hr |
| Apr 4, 2:34 PM CST | Severe Thunderstorm Warning | EWX | Uvalde | 56 min |
| Apr 4, 2:40 PM CST | Severe Thunderstorm Warning | EWX | Real | 65 min |
| Apr 4, 3:00 PM CST | Flash Flood Warning | EWX | Real | 2 hr |
| Apr 4, 3:25 PM CST | Flash Flood Warning | EWX | Bandera | 65 min |
| Apr 4, 3:25 PM CST | Severe Thunderstorm Warning | EWX | Bandera | 65 min |
| Apr 4, 3:32 PM CST | Flash Flood Warning | EWX | Uvalde | 58 min |
| Apr 4, 3:32 PM CST | Severe Thunderstorm Warning | EWX | Uvalde | 58 min |
| Apr 4, 3:53 PM CST | Flash Flood Warning | EWX | Kerr | 2 hr |
| Apr 4, 4:24 PM CST | Flash Flood Warning | EWX | Bandera | 2 hr |
| Apr 4, 4:34 PM CST | Severe Thunderstorm Warning | EWX | Medina | 56 min |
| Apr 4, 5:11 PM CST | Severe Thunderstorm Warning | EWX | Bexar, Kendall | 79 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.