Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 21, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 2, 2004, 1:21 PM CST for Comal County, Guadalupe County, Maverick County, Texas. It was in force for 186 days. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 2, 2004, 1:21 PM CST (19:21 UTC)
- Expired
- Oct 5, 2004, 6:15 AM CDT
- In force
- 186 days
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
Counties Comal County, TX, Guadalupe County, TX, Maverick County, TX
The radar
The Austin/San Antonio radar (KEWX), 15 km from the middle of the area, began a volume at 19:23 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, 7.4 hours before the alert went out and 235 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
- 891 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 618 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KEWX 021922 FFWSAT TXC091-187-022045- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 121 PM CST FRI APR 2 2004 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES... COMAL GUADALUPE * UNTIL 245 PM CST * AT 121 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAINS OF 2 TO 3 INCHES HAD FALLEN OVER PARTS OF CANYON LAKE AND THE CITY OF SEGUIN. THESE HEAVY RAINS WILL RESULT IN FLASH FLOODING ACROSS PARTS OF COMAL AND GUADALUPE COUNTIES THROUGH 245 PM. 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. LAT...LON 2978 9840 2946 9803 2960 9777 2994 9832 $$
1 follow-up statement
000
WGUS54 KEWX 050814
FFWSAT
TXC323-051115-
/X.NEW.KEWX.FF.W.0021.041005T0812Z-041005T1115Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
312 AM CDT TUE OCT 5 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
MAVERICK
* UNTIL 615 AM CDT
* AT 308 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM LOCATED JUST NORTH OF EAGLE
PASS. THIS STORM WAS NEARLY STATIONARY. RAINFALL RATES OF 3 INCHES
AN HOUR WERE BEING ESTIMATED BY RADAR.
* THE STORM PRODUCING VERY HEAVY RAIN WILL IMPACT HIGHWAYS 277 AND 57
NORTH AND EAST OF EAGLE PASS.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND. DO NOT STAY IN FLOOD PRONE AREAS.
LAT...LON 2859 10041 2865 10016 2907 10015 2905 10038
2906 10065
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 11:03 AM CST | Flash Flood Warning | EWX | Bexar, Medina, Val Verde | 186 days |
| Apr 2, 1:59 PM CST | Severe Thunderstorm Warning | EWX | Kinney | 91 min |
| Apr 2, 2:42 PM CST | Flash Flood Warning | EWX | DeWitt, Karnes, Kinney | 186 days |
| Apr 2, 2:48 PM CST | Flash Flood Warning | EWX | Fayette, Maverick | 186 days |
| Apr 2, 5:04 PM CST | Severe Thunderstorm Warning | EWX | Frio | 56 min |
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.