Alert archive / Texas / Flash Flood Warnings in 1991
Flash Flood Warning 8, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 5, 1991, 4:20 AM CST for Bexar County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Apr 5, 1991, 4:20 AM CST (10:20 UTC)
- Expired
- Apr 5, 1991, 7:15 AM CST
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Bexar County, TX
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 10.3 hours before the alert went out and 223 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
- 1559 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 051020
FFWSAT
TXC029-051315-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
420 AM CST FRI APR 5 1991
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 715 AM CST
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...BEXAR
AT 415 AM CST THE NATIONAL WEATHER SERVICE RADAR IN HONDO TEXAS SHOWED
AND AREA OF HEAVY RAIN FROM SHOWERS AND THUNDERSTORMS WEST AND
SOUTHWEST OF SAN ANTONIO MOVING NORTHEAST AT 15 MILES AN HOUR.
THIS AREA OF HEAVY RAIN HAS BEGUN TO MOVE INTO WESTERN BEXAR COUNTY
WILL CAUSE ADDITIONAL FLOODING OVER THE AREA IN THE NEXT 3 HOURS.
THE GROUND IS ALL READY SATURATED FROM HEAVY RAINS DURING THE NIGHT
AND EARLY MORNING HOURS. FLOODING CONTINUES ACROSS OLMOS AND SALADO
CREEKS IN NORTHERN BEXAR COUNTY AND LEON CREEK IN WESTERN BEXAR
COUNTY.
MOTORISTS MUST KEEP AWAY FROM FLOODED LOW AREAS AND NOT TRY TO DRIVE
IN OR NEAR THE FLOOD PLAINS OF THESE CREEKS ALREADY IN FLOOD.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.
DANGEROUS LIGHTNING AND GUSTY WINDS OFTEN ACCOMPANY FLASH FLOOD
PRODUCING THUNDERSTORMS.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVENT.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 4, 11:17 PM CST, 5 hours 3 minutes before
TXZ036-050600
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
1110 PM CST THU APR 4 1991
...FLASH FLOOD WATCH IN EFFECT...
AT 11 PM RADAR INDICATED A WIDESPREAD AREA OF SHOWERS AND THUNDERSTORMS
CONTINUING OVER CENTRAL AND SOUTH CENTRAL TEXAS WITH THE STRONGEST
THUNDERSTORMS EXTENDING FROM NORTH OF SAN ANTONIO AREA TO AUSTIN AND THEN
EAST TO NEAR ELGIN AND BASTROP. FLOODING OF LOW LYING ROADS AND HIGHWAYS
HAS BEEN REPORTED IN EASTERN TRAVIS COUNTY AND OVER PORTIONS OF CENTRAL AND
WESTERN BASTROP COUNTY. OVER THREE AND A HALF INCHES OF RAIN HAS FALLEN
NEAR ELGIN AND INDICATIONS ARE THAT MORE THAN TWO INCHES HAS FALLEN
OVER PORTIONS OF THAT GENERAL AREA EAST OF AUSTIN.
PERSONS SHOULD AVOID TRAVEL TONIGHT. LOW WATER CROSSINGS AND ROADS ARE THE
FIRST TO FLOOD AND CAN BE FATAL. STAY TUNED TO LOCAL TV OR RADIO OR NOAA
WEATHER RADIO FOR FURTHER UPDATES OR POSSIBLE WARNINGS.Special weather statement, Apr 5, 12:12 AM CST, 4 hours 8 minutes before
TXZ036-037-050730
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
1205 AM CST FRI APR 5 1991
...FLASH FLOOD WATCH IN EFFECT...
AT 1157 PM CST...RADAR INDICATED A WIDESPREAD AREA OF SHOWERS AND THUNDER-
STORMS OVER CENTRAL AND SOUTH CENTRAL TEXAS. THE AREA WAS 80 MILES WIDE
EXTENDING FROM SAN ANTONIO TO SAN MARCOS TO BASTROP TO COLLEGE STATION.
THE HEAVIEST RAINFAL WAS OCCURRING JUST NORTH OF SAN ANTONIO TO WEST OF
SAN MARCOS TO NEAR AUSTIN. MOVEMENT OF THE SHOWERS AND THUNDERSTORMS WAS
NORTHEAST AT 15 MPH.
RAINFALL DURING THE EVENING HOURS YESTERDAY HAVE SATURATED THE GROUND IN MANY
LOCATIONS WITH SOME LOW WATER CROSSINGS AND LOW LYING AREAS REPORTED UNDER
WATER. WITH ADDITIONAL RAINFALL LIKELY TONIGHT AND ON FRIDAY...FLOODING AND
FLASH FLOODING COULD BECOME A SERIOUS THREAT WITH LITTLE OR NO WARNING.
IN ADDITION...FREQUENT LIGHTNING HAS BEEN REPORTED WITH THE THUNDERSTORM
ACTIVITY.
PERSONS SHOULD AVOID TRAVEL IF AT ALL POSSIBLE TONIGHT AND FRIDAY.
REMEMBER...LOW WATER CROSSINGS ARE THE FIRST TO FLOOD AND CROSSING
THEM CAN BE FATAL. STAY TUNED TO YOUR LOCAL TV/RADIO OR NOAA WEATHER
FOR FURTHER UPDATES OR POSSIBLE WARNINGS ON THIS PO
TENTIALLY DANGEROUS
FLOOD SITUATION.The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 5:47 AM CST | Flash Flood Warning | EWX | Victoria | 118 min |
| Apr 5, 6:27 AM CST | Severe Thunderstorm Warning | EWX | Jackson, Victoria | 63 min |
| Apr 5, 7:02 AM CST | Flash Flood Warning | EWX | Bexar | 3 hr |
| Apr 5, 7:27 AM CST | Severe Thunderstorm Warning | EWX | Calhoun, Jackson | 63 min |
| Apr 5, 7:38 AM CST | Flash Flood Warning | EWX | Victoria | 3 hr |
| Apr 5, 8:29 AM CST | Flash Flood Warning | EWX | Calhoun | 3 hr |
| Apr 5, 10:29 AM CST | Flash Flood Warning | EWX | Victoria | 2 hr |
| Apr 5, 11:29 AM CST | Flash Flood Warning | EWX | Calhoun | 2 hr |
Nearby
Flash Flood Warnings in Texas, 1991Every flash flood warning in 1991
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.