Alert archive / Texas / Flash Flood Warnings in 2008
Flash Flood Warning 8, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 21, 2008, 8:52 PM CDT for Frio County, Medina 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
- May 21, 2008, 8:52 PM CDT (01:52 UTC)
- Expired
- May 21, 2008, 11:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Frio County, TX, Medina County, TX
The radar
The Laughlin AFB radar (KDFX), 113 km from the middle of the area, began a volume at 01:54 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, 1.9 hours before the alert went out and 168 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
- 869 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 3018 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 76 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 220152 FFWEWX TXC163-325-220445- /O.NEW.KEWX.FF.W.0008.080522T0152Z-080522T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 852 PM CDT WED MAY 21 2008 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... FRIO COUNTY... MEDINA COUNTY... * UNTIL 1145 PM CDT. * AT 848 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA. * LOCATIONS IN THE WARNING AREA INCLUDE BIRY...BADER...QUIHI...NEW FOUNTAIN...DUNLAY...GOLDFINCH...PEARSALL...MOORE AND DEVINE. IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. LAT...LON 2961 9899 2865 9882 2864 9941 2962 9937 TIME...MOT...LOC 0152Z 268DEG 0KT 2943 9913 2868 9911 $$
2 follow-up statements
000 WGUS74 KEWX 220231 FFSEWX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 927 PM CDT WED MAY 21 2008 TXC163-325-220445- /O.CON.KEWX.FF.W.0008.000000T0000Z-080522T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MEDINA TX-FRIO TX- 927 PM CDT WED MAY 21 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR FRIO AND MEDINA COUNTIES... AT 918 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER PORTIONS OF FRIO AND MEDINA COUNTIES. RAINFALL AMOUNTS IN EXCESS OF THREE INCHES ARE POSSIBLE BETWEEN DERBY AND HONDO AND WILL LIKELY CAUSE THE FLOODING OF LOW WATER CROSSINGS ALONG SECONDARY ROADS. IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. TURN AROUND DONT DROWN LAT...LON 2961 9899 2865 9882 2864 9941 2962 9937 TIME...MOT...LOC 0227Z 180DEG 0KT 2943 9913 2868 9911 $$
000 WGUS74 KEWX 220407 FFSEWX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1103 PM CDT WED MAY 21 2008 TXC163-325-220445- /O.CON.KEWX.FF.W.0008.000000T0000Z-080522T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MEDINA TX-FRIO TX- 1103 PM CDT WED MAY 21 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR FRIO AND MEDINA COUNTIES... AT 1054 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED THAT THUNDERSTORMS WERE MOVING EAST OUT OF THE WARNED AREA...BUT FLASH FLOODING DUE TO RUNOFF WAS LIKELY PERSISTING. LOW WATER CROSSINGS ALONG FARM TO MARKET ROADS BETWEEN PEARSALL....HONDO AND CASTROVILLE WILL LIKELY BE FLOODED AND DANGEROUS. DO NOT DRIVE WHERE WATER COVERS THE ROAD. EVEN SUVS AND PICKUPS WILL BE SWEPT AWAY BY AS LITTLE AS TWO FEET OF RUSHING WATER. TURN AROUND DONT DROWN. LAT...LON 2961 9899 2865 9882 2864 9941 2962 9937 TIME...MOT...LOC 0403Z 180DEG 0KT 2943 9913 2868 9911 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:25 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 50 min |
| May 21, 7:40 PM CDT | Areal Flood Advisory | EWX | Dimmit, Frio, Zavala | 2 hr |
| May 21, 8:31 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Frio, Zavala | 17 min |
| May 21, 10:09 PM CDT | Severe Thunderstorm Warning | EWX | Medina | 51 min |
| May 21, 11:11 PM CDT | Areal Flood Advisory | EWX | Bexar | 2 hr |
| May 22, 3:17 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 118 min |
Nearby
Flash Flood Warnings in Texas, 2008Every flash flood warning in 2008
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.