Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 98, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Aug 23, 1999, 7:51 AM CDT for Karnes County, Texas. It was in force for 4 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
- Aug 23, 1999, 7:51 AM CDT (12:51 UTC)
- Expired
- Aug 23, 1999, 12:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Karnes County, TX
The radar
The Austin/San Antonio radar (KEWX), 90 km from the middle of the area, began a volume at 12:51 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, 0.9 hours before the alert went out and 294 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
- 1607 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 996 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KEWX 231255 FFWSAT TXC255-231700- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 751 AM CDT MON AUG 23 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... KARNES COUNTY * UNTIL NOON A BAND OF VERY HEAVY RAIN HAS DEVELOPED AND WILL CONTINUE THE NEXT FEW HOURS OVER PARTS OF KARNES COUNTY. RADAR SHOWS RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. THIS AREA OF RAIN IS ASSOCIATED WITH BRET. THESE SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER PARTS OF KARNES COUNTY THIS MORNING...WITH LOCALLY HEAVY RAIN...GUSTY WIND AND LIGHTNING. EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...LOW WATER CROSSINGS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 22, 9:35 PM CDT, 10 hours 16 minutes earlier.
Area forecast discussion, Aug 22, 9:35 PM CDT, 10 hours 16 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 935 PM CDT SUN AUG 22 1999 BRET INLAND AND HEADING WESTWARD WITH SAT PIX INDICATING WARMING TOPS AND SHRINKING RAIN BANDS. ONLY ISOLATED ACTIVITY CENTRAL ZONES FROM OUTERMOST RAIN BAND AND EXPECT THIS TO DECREASE WITH SUNSET. CLOSER TO STORM CONCENTRATED AREAS OF RAIN WILL AFFECT SOUTHERNMOST COUNTIES OVERNIGHT. ANTICIPATE LOWERING POPS NORTHERN AND CENTRAL COUNTIES OVERNIGHT AND LOWERING HIGH WIND WATCH AND WIND ADVISORY IF BRETS WESTWARD TURN REMAINS AS FORECAST. WILL HOLD UPDATE FOR TCP MESSAGE AT 10 PM. WILL DECREASE POPS AND TRIM WINDS SIGNIFICANTLY TONIGHT...AND CLEAR SOUTHEASTERN COUNTIES FROM TORNADO WATCH. WILL MAKE FEW CHANGES TO MONDAYS FORECAST AS BRETS SLOWING MOVEMENT WILL ALLOW SIGNIFICANT RAIN TO DEVELOP OVER SOUTHERN COUNTIES AND EASTWARD EXTENT OF THAT WILL DEPEND ON LOCATION OF STORM AT THAT TIME. AM RELUCTANT TO LOWER THREAT UNTIL BETTER DEFINED. PRELIMS... AUS 75/93/75/96 3432 SAT 75/87/74/94 5763 DRT 75/90/75/89 3555 .EWX...FLASH FLOOD WATCH THRU MON SRN SXNS SOUTH CENTRAL TX. 10/1
In the hours before
Special weather statement, Aug 23, 5:35 AM CDT, 2 hours 16 minutes before
TXZ171>173-183>194-202>209-217>225-228-232230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 535 AM CDT MON AUG 23 1999 ...TORNADO WATCH IS IN EFFECT UNTIL 4 PM FOR KARNES...ATASCOSA AND FRIO COUNTIES... ...FLASH FLOOD WATCH IS IN EFFECT FOR THE COUNTIES OF DEWITT...FAYETTE...GONZALES...KARNES...LAVACA...ATASCOSA FRIO...WILSON...DIMMIT...MAVERICK...ZAVALA AS BRET CONTINUES MOVING WEST TODAY...AREAS OF RAIN FROM SHOWERS AND THUNDERSTORMS WILL READILY DEVELOP OVER PARTS OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. TROPICAL TORNADOES ARE POSSIBLE OVER SOUTHERN SECTIONS OF SOUTH CENTRAL TEXAS THROUGH 4 PM IN KARNES...ATASCOSA AND FRIO COUNTIES. LOCALLY HEAVY RAIN IS POSSIBLE FROM SHOWERS AND THUNDERSTORMS TODAY...WHERE 2 TO 4 INCHES OF RAIN COULD FORM OVER THE AREA. STRONG GUSTY WINDS ARE ALSO POSSIBLE FROM THE STRONGER SHOWERS AND THUNDERSTORMS. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DIMINISH IN THE EVENING HOURS OVER NORTH AND EAST PARTS OF THE AREA... WHILE WEST TO SOUTHWEST OF SAN ANTONIO AND TOWARD THE RIO GRANDE...THEY MAY CONTINUE...WITH LOCALLY HEAVY RAIN POSSIBLE. CAUTION IS ADVISED AT LOW WATER CROSSINGS AND LOW LYING AREAS... WHERE HEAVY RAIN MAY CAUSE FLOODING. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES... WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...CORPUS CHRISTI AND HOUSTON/GALVESTON.
Special weather statement, Aug 23, 5:35 AM CDT, 2 hours 16 minutes before
TXZ171>173-183>194-202>209-217>225-228-232230- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 535 AM CDT MON AUG 23 1999 ...TORNADO WATCH IS IN EFFECT UNTIL 4 PM FOR KARNES...ATASCOSA AND FRIO COUNTIES... ...FLASH FLOOD WATCH IS IN EFFECT FOR THE COUNTIES OF DEWITT...FAYETTE...GONZALES...KARNES...LAVACA...ATASCOSA FRIO...WILSON...DIMMIT...MAVERICK...ZAVALA AS BRET CONTINUES MOVING WEST TODAY...AREAS OF RAIN FROM SHOWERS AND THUNDERSTORMS WILL READILY DEVELOP OVER PARTS OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. TROPICAL TORNADOES ARE POSSIBLE OVER SOUTHERN SECTIONS OF SOUTH CENTRAL TEXAS THROUGH 4 PM IN KARNES...ATASCOSA AND FRIO COUNTIES. LOCALLY HEAVY RAIN IS POSSIBLE FROM SHOWERS AND THUNDERSTORMS TODAY...WHERE 2 TO 4 INCHES OF RAIN COULD FORM OVER THE AREA. STRONG GUSTY WINDS ARE ALSO POSSIBLE FROM THE STRONGER SHOWERS AND THUNDERSTORMS. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DIMINISH IN THE EVENING HOURS OVER NORTH AND EAST PARTS OF THE AREA... WHILE WEST TO SOUTHWEST OF SAN ANTONIO AND TOWARD THE RIO GRANDE...THEY MAY CONTINUE...WITH LOCALLY HEAVY RAIN POSSIBLE. CAUTION IS ADVISED AT LOW WATER CROSSINGS AND LOW LYING AREAS... WHERE HEAVY RAIN MAY CAUSE FLOODING. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES... WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...CORPUS CHRISTI AND HOUSTON/GALVESTON.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:22 AM CDT | Flash Flood Warning | EWX | Atascosa, Frio | 5 hr |
| Aug 23, 11:59 AM CDT | Flash Flood Warning | EWX | DeWitt | 3 hr |
| Aug 23, 12:30 PM CDT | Flash Flood Warning | EWX | Atascosa, Frio | 4 hr |
| Aug 23, 4:20 PM CDT | Tornado Warning | EWX | Burnet, Williamson | 45 min |
Nearby
Flash Flood Warnings in Texas, 1999Every flash flood warning in 1999
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.