Alert archive / Texas / Flash Flood Warnings in 1997
Flash Flood Warning 11, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 2, 1997, 11:42 AM CST for Karnes County, Texas. It was in force for 2 hr. 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 2, 1997, 11:42 AM CST (17:42 UTC)
- Expired
- Apr 2, 1997, 1:45 PM CST
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Karnes County, TX
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 5.7 hours before the alert went out and 140 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
- 1013 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 496 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 021744 FFWSAT TXC255-021945- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1142 AM CST WED APR 2 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 145 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...KARNES COUNTY AT 1140 AM RADAR INDICATED A BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDING FROM NEAR KARNES CITY TO HELENA. THIS BAND WAS PART OF A LARGER BAND EXTENDING FROM VICTORIA TO JUST SOUTH OF SAN ANTONIO. MOVEMENT WAS NORTHEAST AT 25 MPH. OTHER SMALL BANDS ARE FORMING TO THE SOUTH OF KARNES COUNTY WHICH WILL MOVE THROUGH OVER THE NEXT FEW HOURS. RAINFALL RATES OF ONE TO TWO INCHES OF RAIN CAN BE EXPECTED WITH THESE STORMS. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV AND RADIO AND ...CABLE TV FOR FURTHER STATEMENTS OR WARNINGS. AVOID ALREADY FLOODED AREAS. TRAVELERS SHOULD NOT ATTEMPT TO CROSS FLOODED ROADS. IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE IMMEDIATELY TO HIGHER GROUND IF YOU CAN DO SO SAFELY. FLOOD PRONE URBAN AREAS FILL WITH WATER QUICKLY. CLOGGED STORM DRAINS MAY CAUSE OTHER AREAS TO FLOOD. DO NOT DRIVE THROUfGH FLOOD WATERS AND STAY AWAY FROM STORM DRAINS.
What forecasters said that day
The local office's own words before this flash flood 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 2, 5:45 AM CST, 5 hours 57 minutes before
TXZ171>173-183>194-202>209-217>225-228-030000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 545 AM CST WED APR 2 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY. THE WATCH AREA LIES ALONG AND NORTH OF A LINE FROM EAGLE PASS TO CARRIZO SPRINGS... PEARSALL... JOURDANTON... KARNES CITY... CUERO... AND HALLETTSVILLE INCLUDING THE METROPOLITAN AREAS OF AUSTIN... SAN ANTONIO... DEL RIO... AND KERRVILLE. A FLASH FLOOD WATCH MEANS WEATHER CONDITIONS ARE FAVORABLE FOR HEAVY RAIN... FLASH FLOODING... AND RIVER FLOODING IN OR NEAR THE WATCH AREA. A POWERFUL UPPER LEVEL DISTURBANCE HAS ORGANIZED OVER SOUTHERN CALIFORNIA. SOUTH TEXAS HAS BECOME UNUSUALLY RICH IN MOISTURE FROM THE GULF OF MEXICO AND THE PACIFIC OCEAN AHEAD OF THIS STORM. AS THIS UPPER LEVEL DISTURBANCE MOVES SLOWLY EASTWARD TOWARD TEXAS THIS AFTERNOON... THE ATMOSPHERE WILL BECOME INCREASINGLY UNSTABLE AND NUMEROUS SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN WILL DEVELOP. THE HEAVY RAIN WILL MOVE SLOWLY EASTWARD TONIGHT PRODUCING 2 TO 4 INCHES OF RAIN WITH ISOLATED AMOUNTS OVER 5 INCHES. AREAS WET FROM RECENT HEAVY RAINS ARE AT PRIME RISK OF FLOODING IF HEAVY RAIN DEVELOPS. MOTORISTS ARE STRONGLY ADVISED TO DRIVE CAREFULLY IF THUNDERSTORMS AND VERY HEAVY RAIN DEVELOP. FLOODING IS LIKELY LATE THIS AFTERNOON AND TONIGHT. RAPID RISES AND FLOODING ARE POSSIBLE NEAR LOW WATER CROSSINGS. 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 2, 5:47 AM CST, 5 hours 55 minutes before
TXZ171>173-183>194-202>209-217>225-228-030000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 545 AM CST WED APR 2 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY. THE WATCH AREA LIES ALONG AND NORTH OF A LINE FROM EAGLE PASS TO CARRIZO SPRINGS... PEARSALL... JOURDANTON... KARNES CITY... CUERO... AND HALLETTSVILLE INCLUDING THE METROPOLITAN AREAS OF AUSTIN... SAN ANTONIO... DEL RIO... AND KERRVILLE. A FLASH FLOOD WATCH MEANS WEATHER CONDITIONS ARE FAVORABLE FOR HEAVY RAIN... FLASH FLOODING... AND RIVER FLOODING IN OR NEAR THE WATCH AREA. A POWERFUL UPPER LEVEL DISTURBANCE HAS ORGANIZED OVER SOUTHERN CALIFORNIA. SOUTH TEXAS HAS BECOME UNUSUALLY RICH IN MOISTURE FROM THE GULF OF MEXICO AND THE PACIFIC OCEAN AHEAD OF THIS STORM. AS THIS UPPER LEVEL DISTURBANCE MOVES SLOWLY EASTWARD TOWARD TEXAS THIS AFTERNOON... THE ATMOSPHERE WILL BECOME INCREASINGLY UNSTABLE AND NUMEROUS SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN WILL DEVELOP. THE HEAVY RAIN WILL MOVE SLOWLY EASTWARD TONIGHT PRODUCING 2 TO 4 INCHES OF RAIN WITH ISOLATED AMOUNTS OVER 5 INCHES. AREAS WET FROM RECENT HEAVY RAINS ARE AT PRIME RISK OF FLOODING IF HEAVY RAIN DEVELOPS. MOTORISTS ARE STRONGLY ADVISED TO DRIVE CAREFULLY IF THUNDERSTORMS AND VERY HEAVY RAIN DEVELOP. FLOODING IS LIKELY LATE THIS AFTERNOON AND TONIGHT. RAPID RISES AND FLOODING ARE POSSIBLE NEAR LOW WATER CROSSINGS. 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 H&AZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER NO LONGER IS EXPECTED.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 12:40 PM CST | Flash Flood Warning | EWX | DeWitt | 3 hr |
| Apr 2, 1:59 PM CST | Flash Flood Warning | EWX | Atascosa, Karnes | 3 hr |
| Apr 2, 1:59 PM CST | Flash Flood Warning | EWX | Medina | 3 hr |
| Apr 2, 5:31 PM CST | Flash Flood Warning | EWX | Uvalde | 119 min |
Nearby
Flash Flood Warnings in Texas, 1997Every flash flood 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.