Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 341, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 24, 2004, 4:41 PM CDT for Comal County, Guadalupe County, Hays 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 outline as issued.
The facts
- Issued
- Oct 24, 2004, 4:41 PM CDT (21:41 UTC)
- Expired
- Oct 24, 2004, 7:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
Counties Comal County, TX, Guadalupe County, TX, Hays County, TX
The radar
The Austin/San Antonio radar (KEWX), 13 km from the middle of the area, began a volume at 21:43 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
Corpus Christi, TX (KCRP), launched 12:00Z, 9.7 hours before the alert went out and 242 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
- 950 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 794 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 242143
FFWSAT
TXC091-187-209-250045-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
441 PM CDT SUN OCT 24 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
HAYS
COMAL
GUADALUPE
* UNTIL 745 PM CDT
* AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM DRIPPING SPRINGS TO CANYON LAKE TO BULVERDE
THEN EAST TO NEW BRAUNFELS...SEGUIN AND SAN MARCOS. RAINFALL RATES
OF UP TO AROUND TWO INCHES PER HOUR WERE NOTED AND WILL CONTINUE
FOR THE NEXT COUPLE OF HOURS. SMALL HAIL AND GUSTY WINDS CAN ALSO
BE EXPECTED.
* LOCATIONS IN THE WARNING INCLUDE ZORN...WOODCREEK...WIMBERLEY...
SMITHSON VALLEY...SAN MARCOS...NEW BRAUNFELS...GERONIMO...
FISCHER...DRIPPING SPRINGS...DRIFTWOOD AND CANYON LAKE DAM.
HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND
STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY
DRAINED AREAS.
HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...
COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND. DO NOT STAY IN FLOOD PRONE AREAS.
LAT...LON 2948 9814 2966 9790 3016 9795 3029 9811
2975 9840
$$3 follow-up statements
000
WGUS74 KEWX 242204
FFSSAT
TXC091-187-209-250045-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
502 PM CDT SUN OCT 24 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 745 PM CDT FOR GUADALUPE...
COMAL AND HAYS COUNTIES...
AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE VERY HEAVY RAIN FROM DRIFTWOOD AND BUDA...TO ACROSS SAN
MARCOS AND NEW BRAUNFELS...THEN TO SEGUIN.
LOCATIONS IN THE WARNING INCLUDE WOODCREEK...WIMBERLEY...SAN
MARCOS...FISCHER...DRIPPING SPRINGS...DRIFTWOOD AND CANYON LAKE DAM.
HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND
STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY
DRAINED AREAS.
HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...
COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
FLASH FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED AREAS. A LITTLE
OVER A FOOT OF WATER CAN CARRY AWAY MOST CARS AND TRUCKS. TURN AROUND
- DONT DROWN.
LAT...LON 2948 9814 2966 9790 3016 9795 3029 9811
2975 9840
$$000
WGUS74 KEWX 242255
FFSSAT
TXC091-187-209-250045-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
552 PM CDT SUN OCT 24 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 745 PM CDT FOR GUADALUPE...
COMAL AND HAYS COUNTIES...
AT 551 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN ACROSS EASTERN GUADALUPE COUNTY WITH RAINFALL RATES
OF AROUND ONE INCH PER HOUR. ELSEWHERE ACROSS
GUADALUPE...COMAL...AND HAYS COUNTIES LIGHT TO MODERATE RAIN WAS
INDICATED WITH RAINFALL RATES LESS THAN ONE HALF INCH PER HOUR.
LOCATIONS IN THE WARNING INCLUDE NEW BRAUNFELS...ZORN...WOODCREEK...
WIMBERLEY...SMITHSON VALLEY...SAN MARCOS...FISCHER...DRIPPING
SPRINGS...DRIFTWOOD AND CANYON LAKE DAM.
HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND
STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY
DRAINED AREAS.
FLASH FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED AREAS. A LITTLE
OVER A FOOT OF WATER CAN CARRY AWAY MOST CARS AND TRUCKS. TURN AROUND
- DONT DROWN.
LAT...LON 2948 9814 2966 9790 3016 9795 3029 9811
2975 9840
$$000
WGUS74 KEWX 242357
FFSSAT
TXC091-187-209-250045-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
655 PM CDT SUN OCT 24 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 745 PM CDT FOR GUADALUPE...
COMAL AND HAYS COUNTIES...
AT 654 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ONLY LIGHT TO MODERATE RAIN ACROSS GUADALUPE...COMAL AND HAYS
COUNTIES WITH RAINFALL RATES OF ONE HALF INCH OR LESS PER HOUR.
SOME SMALL STREAMS WILL STILL BE IN FLOOD FOR THE NEXT HOUR DUE TO
EARLIER HEAVY RAINS.
HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND
STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY
DRAINED AREAS.
HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...
COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
FLASH FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED AREAS. A LITTLE
OVER A FOOT OF WATER CAN CARRY AWAY MOST CARS AND TRUCKS. TURN AROUND
- DONT DROWN.
LAT...LON 2948 9814 2966 9790 3016 9795 3029 9811
2975 9840
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 4:05 PM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
| Oct 24, 5:11 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 64 min |
| Oct 24, 5:39 PM CDT | Severe Thunderstorm Warning | EWX | Frio, Medina | 66 min |
| Oct 24, 5:58 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 62 min |
| Oct 24, 6:08 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales | 67 min |
| Oct 24, 6:15 PM CDT | Flash Flood Warning | EWX | Frio, Medina | 3 hr |
| Oct 24, 6:45 PM CDT | Severe Thunderstorm Warning | EWX | Wilson | 60 min |
| Oct 24, 6:58 PM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2004Every flash flood warning in 2004
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.