Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 29, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 12, 1999, 12:35 AM CDT for Medina County, Uvalde County, Texas. It was in force for 3 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
- May 12, 1999, 12:35 AM CDT (05:35 UTC)
- Expired
- May 12, 1999, 3:35 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Medina County, TX, Uvalde County, TX
The radar
The Laughlin AFB radar (KDFX), 82 km from the middle of the area, began a volume at 05:36 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 00:00Z, 5.6 hours before the alert went out and 136 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
- 3001 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1924 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 5.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 120535 FFWSAT TXC325-463-120835- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1235 AM CDT WED MAY 12 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... UVALDE COUNTY IN TEXAS MEDINA COUNTY IN TEXAS * UNTIL 335 AM CDT * AT AT 1230 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN FROM UVALDE EAST TO MEDINA LAKE... MOVING SOUTHEAST AT 15 MPH. * A COLD FRONT MOVING SOUTH ACROSS THE HILL COUNTRY WAS PRODUCING SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL. DOPPLER RADAR ESTIMATED HOURLY RAINFALL RATES OF 2 TO 3 INCHES. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGER OF FLOODING. JPB BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT DRIVE THROUGH WATER OF UNKNOWN DEPTH.
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
Local storm report, May 11, 10:21 PM CDT, 2 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 PM CST TUE MAY 11 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
610 PM CASTELL TX TENNIS BALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
645 PM CASTELL TX GULFBALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
655 PM CASTELL TX GULFBALL SIZE HAIL
05/11/99 LLANO 2 MILES WEST OF CASTELL
REPORTED BY TV WEATHERMAN
810 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE REPORTED BY FIREMAN
820 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE 3 MILES EAST ON HW 290
REPORTED BY SHERIF
820 PM HARPER TX TORNADIO HIT HARPER HIGH
05/11/99 GILLESPIE SCHOOL...TOOK ROOF OFF
TORNADO HIT U-HAUL TRUCK
PERSON TRAPED INSIDE
1000 PM KERVILLE TX THREE-QUARTER INCH HAIL
05/11/99 KEER REPORTED BY SPOTTER
1000 PM INGRAM TX NICKEL SIZE HAIL...4 MILES
05/11/99 KERR NORTHWEST OF INGRAM ON HY27
REPORTED BY SPOTTERLocal storm report, May 11, 10:31 PM CDT, 2 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 PM CST TUE MAY 11 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
610 PM CASTELL TX TENNIS BALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
645 PM CASTELL TX GOLFBALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
655 PM CASTELL TX GOLFBALL SIZE HAIL
05/11/99 LLANO 2 MILES WEST OF CASTELL
REPORTED BY TV WEATHERMAN
810 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE REPORTED BY FIREMAN
820 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE 3 MILES EAST ON HW 290
REPORTED BY SHERIF
820 PM HARPER TX TORNADO HIT HARPER HIGH
05/11/99 GILLESPIE SCHOOL...TOOK ROOF OFF
TORNADO HIT U-HAUL TRUCK
PERSON TRAPED INSIDE
1000 PM KERVILLE TX THREE-QUARTER INCH HAIL
05/11/99 KEER REPORTED BY SPOTTER
1000 PM INGRAM TX NICKEL SIZE HAIL...4 MILES
05/11/99 KERR NORTHWEST OF INGRAM ON HY27
REPORTED BY SPOTTERLocal storm report, May 11, 11:20 PM CDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 PM CST TUE MAY 11 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
610 PM CASTELL TX TENNIS BALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
645 PM CASTELL TX GULFBALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
655 PM CASTELL TX GULFBALL SIZE HAIL
05/11/99 LLANO 2 MILES WEST OF CASTELL
REPORTED BY TV WEATHERMAN
810 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE REPORTED BY FIREMAN
820 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE 3 MILES EAST ON HW 290
REPORTED BY SHERIF
820 PM HARPER TX TORNADIO HIT HARPER HIGH
05/11/99 GILLESPIE SCHOOL...TOOK ROOF OFF
TORNADO HIT U-HAUL TRUCK
PERSON TRAPED INSIDE
1000 PM KERVILLE TX THREE-QUARTER INCH HAIL
05/11/99 KEER REPORTED BY SPOTTER
1000 PM INGRAM TX NICKEL SIZE HAIL...4 MILES
05/11/99 KERR NORTHWEST OF INGRAM ON HY27
REPORTED BY SPOTTERLocal storm report, May 11, 11:20 PM CDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 PM CST TUE MAY 11 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
610 PM CASTELL TX TENNIS BALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
645 PM CASTELL TX GOLFBALL SIZE HAIL
05/11/99 LLANO REPORTED BY STORM SPOTTER
655 PM CASTELL TX GOLFBALL SIZE HAIL
05/11/99 LLANO 2 MILES WEST OF CASTELL
REPORTED BY TV WEATHERMAN
810 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE REPORTED BY FIREMAN
820 PM HARPER TX BASEBALL SIZE HAIL
05/11/99 GILLESPIE 3 MILES EAST ON HW 290
REPORTED BY SHERIF
820 PM HARPER TX TORNADO HIT HARPER HIGH
05/11/99 GILLESPIE SCHOOL...TOOK ROOF OFF
TORNADO HIT U-HAUL TRUCK
PERSON TRAPED INSIDE
1000 PM KERVILLE TX THREE-QUARTER INCH HAIL
05/11/99 KEER REPORTED BY SPOTTER
1000 PM INGRAM TX NICKEL SIZE HAIL...4 MILES
05/11/99 KERR NORTHWEST OF INGRAM ON HY27
REPORTED BY SPOTTERSpecial weather statement, May 12, 12:15 AM CDT, 20 minutes before
TXZ171-172-183>190-121100- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1215 AM CDT WED MAY 12 1999 ...SEVERE THUNDERSTORM WATCH IN EFFECT TIL 5 AM WEDNESDAY MORNING FOR THE WESTERN PORTIONS OF SOUTH CENTRAL TEXAS... ...FLASH FLOOD WATCH IN EFFECT TONIGHT FOR THE TEXAS HILL COUNTRY AND MUCH OF SOUTH CENTRAL TEXAS... HAZARDOUS WEATHER IS CONTINUING OVER PORTIONS OF THE TEXAS HILL COUNTRY AND THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS. THIS ACTIVITY IS EXPECTED TO CONTINUE THROUGHOUT THE NIGHT AREAWIDE. A MOIST AND UNSTABLE AIRMASS REMAINS OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE SLOWLY SOUTHEAST THROUGH THE REGION TONIGHT. THE SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO OCCUR. POSSIBLE TORNADOES...LARGE HAIL... STRONG GUSTY WINDS TO 60 MPH...AND DANGEROUS LIGHTNING WILL CONTINUE TO BE VERY POSSIBLE. THE FLASH FLOOD WATCH FOR THE HILL COUNTRY AND MUCH OF SOUTH CENTRAL TEXAS MEANS THIS AREA WILL RECEIVE AN ADDITIONAL ONE TO THREE INCHES OF RAIN WITH ISOLATED AMOUNTS UP TO FIVE INCHES POSSIBLE. THIS AREA HAS ALREADY RECEIVED HEAVY RAINFALL FROM THE STORMS SUNDAY NIGHT AND MONDAY. THE ADDITIONAL HEAVY RAINFALL ACROSS THE WATCH AREA WILL RESULT IN RAPID RUNOFF AND FLASH FLOODING. RESIDENTS IN THE WATCH AREA SHOULD MONITOR THE LATEST WEATHER DEVELOPMENTS CONCERNING THIS HEAVY RAINFALL EVENT. STAY INFORMED OF THE WEATHER AND RIVER FORECASTS AND BULLETINS...AND BE READY TO TAKE IMMEDIATE ACTION TO SAFEGUARD LIFE AND PROPERTY IF FLASH FLOODING OR VERY HEAVY RAINFALL IS OBSERVED... OR IF A WARNING IS ISSUED. IF YOU ARE IN A VEHICLE...DO NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADWAYS STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS CONCERNING THIS DANGEROUS SEVERE WEATHER AND FLASH FLOOD THREATS. LAW ENFORCEMENT AGENCIES...EMERGENCY MANAGEMENT OFFICIALS...STORM SPOTTER GROUPS...AND OTHER INTERESTED CONCERNS SHOULD MONITOR THIS SITUATION AND TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN YOUR AREA.
Special weather statement, May 12, 12:15 AM CDT, 20 minutes before
TXZ171-172-183>190-121100- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1215 AM CDT WED MAY 12 1999 ...SEVERE THUNDERSTORM WATCH IN EFFECT TIL 5 AM WEDNESDAY MORNING FOR THE WESTERN PORTIONS OF SOUTH CENTRAL TEXAS... ...FLASH FLOOD WATCH IN EFFECT TONIGHT FOR THE TEXAS HILL COUNTRY AND MUCH OF SOUTH CENTRAL TEXAS... HAZARDOUS WEATHER IS CONTINUING OVER PORTIONS OF THE TEXAS HILL COUNTRY AND THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS. THIS ACTIVITY IS EXPECTED TO CONTINUE THROUGHOUT THE NIGHT AREAWIDE. A MOIST AND UNSTABLE AIRMASS REMAINS OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE SLOWLY SOUTHEAST THROUGH THE REGION TONIGHT. THE SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO OCCUR. POSSIBLE TORNADOES...LARGE HAIL... STRONG GUSTY WINDS TO 60 MPH...AND DANGEROUS LIGHTNING WILL CONTINUE TO BE VERY POSSIBLE. THE FLASH FLOOD WATCH FOR THE HILL COUNTRY AND MUCH OF SOUTH CENTRAL TEXAS MEANS THIS AREA WILL RECEIVE AN ADDITIONAL ONE TO THREE INCHES OF RAIN WITH ISOLATED AMOUNTS UP TO FIVE INCHES POSSIBLE. THIS AREA HAS ALREADY RECEIVED HEAVY RAINFALL FROM THE STORMS SUNDAY NIGHT AND MONDAY. THE ADDITIONAL HEAVY RAINFALL ACROSS THE WATCH AREA WILL RESULT IN RAPID RUNOFF AND FLASH FLOODING. RESIDENTS IN THE WATCH AREA SHOULD MONITOR THE LATEST WEATHER DEVELOPMENTS CONCERNING THIS HEAVY RAINFALL EVENT. STAY INFORMED OF THE WEATHER AND RIVER FORECASTS AND BULLETINS...AND BE READY TO TAKE IMMEDIATE ACTION TO SAFEGUARD LIFE AND PROPERTY IF FLASH FLOODING OR VERY HEAVY RAINFALL IS OBSERVED... OR IF A WARNING IS ISSUED. IF YOU ARE IN A VEHICLE...DO NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADWAYS STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS CONCERNING THIS DANGEROUS SEVERE WEATHER AND FLASH FLOOD THREATS. LAW ENFORCEMENT AGENCIES...EMERGENCY MANAGEMENT OFFICIALS...STORM SPOTTER GROUPS...AND OTHER INTERESTED CONCERNS SHOULD MONITOR THIS SITUATION AND TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN YOUR AREA.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:03 PM CDT | Tornado Warning | EWX | Llano | 62 min |
| May 11, 7:22 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie | 63 min |
| May 11, 7:28 PM CDT | Tornado Warning | EWX | Gillespie | 62 min |
| May 11, 8:14 PM CDT | Flash Flood Warning | EWX | Gillespie | 3 hr |
| May 11, 8:14 PM CDT | Flash Flood Warning | EWX | Burnet | 3 hr |
| May 11, 8:26 PM CDT | Tornado Warning | EWX | Gillespie | 64 min |
| May 11, 8:29 PM CDT | Tornado Warning | EWX | Burnet | 61 min |
| May 11, 8:34 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 61 min |
| May 11, 8:50 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 60 min |
| May 11, 9:16 PM CDT | Flash Flood Warning | EWX | Williamson | 3 hr |
| May 11, 9:35 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 60 min |
| May 11, 9:39 PM CDT | Severe Thunderstorm Warning | EWX | Real | 2 hr |
| May 11, 9:57 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick | 63 min |
| May 11, 10:03 PM CDT | Flash Flood Warning | EWX | Kerr | 3 hr |
| May 11, 10:20 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 70 min |
| May 11, 10:56 PM CDT | Severe Thunderstorm Warning | EWX | Real | 34 min |
| May 11, 11:03 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 62 min |
| May 11, 11:14 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 61 min |
| May 11, 11:26 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 79 min |
| May 11, 11:31 PM CDT | Severe Thunderstorm Warning | EWX | Medina | 64 min |
| May 11, 11:56 PM CDT | Flash Flood Warning | EWX | Kinney, Maverick | 4 hr |
| May 12, 12:03 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 57 min |
| May 12, 12:15 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 60 min |
| May 12, 12:31 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 59 min |
| May 12, 12:49 AM CDT | Severe Thunderstorm Warning | EWX | Zavala | 91 min |
| May 12, 1:10 AM CDT | Severe Thunderstorm Warning | EWX | Maverick | 65 min |
| May 12, 1:20 AM CDT | Severe Thunderstorm Warning | EWX | Frio | 80 min |
| May 12, 3:59 AM CDT | Severe Thunderstorm Warning | EWX | Karnes | 61 min |
| May 12, 4:51 AM CDT | Flash Flood Warning | EWX | DeWitt, Karnes | 2 hr |
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.