Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 266, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Aug 22, 2004, 8:50 PM CDT for Bexar County, Medina County, Texas. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2004, 8:50 PM CDT (01:50 UTC)
- Expired
- Aug 22, 2004, 10:45 PM CDT
- In force
- 115 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
Counties Bexar County, TX, Medina County, TX
The radar
The Austin/San Antonio radar (KEWX), 74 km from the middle of the area, began a volume at 01:50 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, 1.8 hours before the alert went out and 201 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
- 2116 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1092 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 230154
FFWSAT
TXC029-325-230345-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
850 PM CDT SUN AUG 22 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
BEXAR
MEDINA
* UNTIL 1045 PM CDT
* AT 845 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WESTERN
SECTIONS OF BEXAR COUNTY AND THE EASTERN SECTIONS OF MEDINA
COUNTY FROM CASTROVILLE TO LEON VALLEY. MOVING NORTH AT 10 MPH.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS...STREAMS...HIGHWAYS AND UNDERPASSES. EXPECT STRONG
THUNDERSTORM WINDS...SMALL HAIL AND DANGEROUS LIGHTNING.
LAT...LON 2961 9888 2971 9879 2971 9874 2972 9873
2972 9864 2928 9872 2928 9888
$$3 follow-up statements
000 WGUS74 KEWX 230233 FFSSAT TXC029-325-230315- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 928 PM CDT SUN AUG 22 2004 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR BEXAR AND MEDINA COUNTIES... THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL CONTINUE TO MOVE NORTH AT 10 TO 15 MPH ACROSS THE EASTERN SECTIONS OF MEDINA COUNTY AND THE WESTERN SECTIONS OF BEXAR COUNTY. THESE STORMS HAVE RAINFALL RATES OF 1.5 TO 2.5 INCHES AN HOUR. THE HEAVIEST RAINS CONTINUE BETWEEN CASTROVILLE AND LEON VALLEY. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. LAT...LON 2947 9989 2929 9947 2960 9945 2961 9979 $$
000 WGUS74 KEWX 230320 FFSSAT TXC029-325-230345- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1013 PM CDT SUN AUG 22 2004 ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR BEXAR AND MEDINA COUNTIES... THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL ARE MOVING NORTHEAST AROUND 10 MPH ACROSS EASTERN MEDINA COUNTY...BEXAR COUNTY AND INTO THE COUNTIES OF BANDERA...KENDALL AND COMAL. THESE STORMS HAVE RAINFALL AMOUNTS AVERAGING AROUND THREE QUARTER INCHES WITH HEAVIER AMOUNTS UP TO ONE INCH IN THE STRONGER STORMS. EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. LAT...LON 2947 9989 2929 9947 2960 9945 2961 9979 $$
000 WGUS74 KEWX 230351 FFSSAT TXC029-325-230415- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1050 PM CDT SUN AUG 22 2004 ...THE FLASH FLOOD WARNING FOR BEXAR AND MEDINA COUNTIES HAS EXPIRED. ... STRONG THUNDERSTORMS HAVE DECREASED IN AREA COVERAGE AND MOVED NORTHEAST. ADDITIONAL STORMS ARE DEVELOPING TO THE SOUTHWEST AND WILL MOVE NORTH PRODUCING RAINFALL AMOUNTS OF ONE QUARTER TO ONE HALF INCHES. ROAD CLOSURES HAVE BEEN REPORTED IN BEXAR COUNTY AND STREAM AND CREEKS HAVE BEEN REPORTED AT BANKFULL. THE FLOODING OF CREEKS AND STREAMS WILL REMAIN AT DANGEROUS LEVELS THROUGH THE NIGHTTIME HOURS. LAT...LON 2947 9989 2929 9947 2960 9945 2961 9979 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 9:15 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Medina | 60 min |
| Aug 22, 11:04 PM CDT | Flash Flood Warning | EWX | Frio | 3 hr |
| Aug 22, 11:40 PM CDT | Flash Flood Warning | EWX | Medina | 3 hr |
| Aug 23, 12:12 AM CDT | Flash Flood Warning | EWX | Bandera | 3 hr |
| Aug 23, 1:31 AM CDT | Flash Flood Warning | EWX | Kendall | 3 hr |
| Aug 23, 1:42 AM CDT | Flash Flood Warning | EWX | Frio, Medina | 4 hr |
| Aug 23, 5:37 AM CDT | Flash Flood Warning | EWX | Frio | 113 min |
| Aug 23, 7:20 AM CDT | Flash Flood Warning | EWX | Frio | 3 hr |
| Aug 23, 8:27 AM CDT | Flash Flood Warning | EWX | Dimmit | 4 hr |
| Aug 23, 10:11 AM CDT | Flash Flood Warning | EWX | Frio | 4 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.