Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 70, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 24, 2004, 2:15 AM CDT for Comal 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
- Apr 24, 2004, 2:15 AM CDT (07:15 UTC)
- Expired
- Apr 24, 2004, 5:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Comal County, TX
The radar
The Austin/San Antonio radar (KEWX), 34 km from the middle of the area, began a volume at 07:17 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, 7.3 hours before the alert went out and 244 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
- 2594 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 842 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 240715
FFWSAT
TXC091-241015-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
215 AM CDT SAT APR 24 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
COMAL COUNTY IN SOUTH CENTRAL TEXAS
THIS INCLUDES THE CITY OF CANYON LAKE DAM
* UNTIL 515 AM CDT
* AT 210 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM NEAR SMITHSON VALLEY...OR ABOUT
7 MILES SOUTH OF CANYON LAKE DAM...MOVING NORTHEAST AT 20 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SPRING BRANCH...GARDEN RIDGE AND FISCHER.
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 HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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.
LAT...LON 2981 9858 2977 9836 2962 9831 2978 9804
3002 9830
$$
LENZ1 follow-up statement
000
WGUS74 KEWX 240931
FFSSAT
TXC091-241015-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
430 AM CDT SAT APR 24 2004
...THE FLASH FLOOD WARNING FOR COMAL COUNTY IS CANCELLED...
AT 430 AM CDT...DOPPLER RADAR INDICATED THAT THE HEAVY RAIN HAD
MOVED EAST AND NORTH OF COMAL COUNTY WITH ONLY LIGHT RAIN
CONTINUING. PONDING OF WATER ON ROADS WILL CONTINUE FOR THE NEXT
SEVERAL HOURS.
LAT...LON 2981 9858 2977 9836 2962 9831 2978 9804
3002 9830
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:38 PM CDT | Tornado Warning | EWX | Maverick | 37 min |
| Apr 24, 12:50 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 25 min |
| Apr 24, 12:54 AM CDT | Severe Thunderstorm Warning | EWX | Bexar | 51 min |
| Apr 24, 1:10 AM CDT | Flash Flood Warning | EWX | Atascosa, Bexar | 3 hr |
| Apr 24, 1:15 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 45 min |
| Apr 24, 1:30 AM CDT | Severe Thunderstorm Warning | EWX | Kendall | 45 min |
| Apr 24, 1:42 AM CDT | Severe Thunderstorm Warning | EWX | Wilson | 48 min |
| Apr 24, 2:08 AM CDT | Flash Flood Warning | EWX | Blanco, Gillespie | 3 hr |
| Apr 24, 2:10 AM CDT | Severe Thunderstorm Warning | EWX | Comal, Guadalupe | 50 min |
| Apr 24, 2:46 AM CDT | Flash Flood Warning | EWX | Gonzales, Guadalupe | 3 hr |
| Apr 24, 3:42 AM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 63 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.