Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 63, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 28, 2012, 10:41 PM CDT for Dimmit 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
- Sep 28, 2012, 10:41 PM CDT (03:41 UTC)
- Expired
- Sep 29, 2012, 1:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Dimmit County, TX
The radar
The Laughlin AFB radar (KDFX), 107 km from the middle of the area, began a volume at 03:44 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, 3.7 hours before the alert went out and 151 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
- 933 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
896 WGUS54 KEWX 290341 FFWEWX TXC127-290630- /O.NEW.KEWX.FF.W.0063.120929T0341Z-120929T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1041 PM CDT FRI SEP 28 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL DIMMIT COUNTY... * UNTIL 130 AM CDT. * AT 1038 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. DOPPLER RADAR HAS ESTIMATED RAINFALL OF 2 TO 3 INCHES PER HOUR. ANOTHER 2 TO 3 INCHES OF RAIN IS EXPECTED OVER THE AREA DURING THE THE NEXT FEW HOURS. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BIG WELLS...ASHERTON...BRUNDAGE...CATARINA...GILSON GROVES...LAS VEGAS AND LIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 2860 9979 2861 9944 2823 9945 2823 10000 $$
1 follow-up statement
454 WGUS74 KEWX 290546 FFSEWX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1246 AM CDT SAT SEP 29 2012 TXC127-290630- /O.CON.KEWX.FF.W.0063.000000T0000Z-120929T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DIMMIT TX- 1246 AM CDT SAT SEP 29 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR CENTRAL DIMMIT COUNTY... AT 1240 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT MODERATE RAINS OVER CENTRAL DIMMIT COUNTY. ADDITIONAL RAINFALL OF UP TO ONE INCH ARE POSSIBLE. THIS WILL GENERATE ADDITIONAL FLASH FLOODING ALONG HIGHWAY 83 FROM CARRIZO SPRING TO ASHERTON TO CATARINA AND ALONG HIGHWAY 85 FROM CARRIZO SPRINGS TO BRUNDAGE TO BIG WELLS. LOCATIONS IN THE WARNING AREA INCLUDE LAS VEGAS...BRUNDAGE...BIG WELLS AND ASHERTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. && LAT...LON 2860 9979 2861 9944 2823 9945 2823 10000 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 7:30 PM CDT | Areal Flood Advisory | EWX | Maverick | 2 hr |
| Sep 28, 8:21 PM CDT | Flash Flood Warning | EWX | Maverick | 3 hr |
| Sep 28, 9:19 PM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe | 2 hr |
| Sep 28, 10:29 PM CDT | Flash Flood Warning | EWX | Zavala | 3 hr |
| Sep 29, 12:14 AM CDT | Areal Flood Advisory | EWX | Bexar | 3 hr |
| Sep 29, 12:29 AM CDT | Special Weather Statement | EWX | Frio | 61 min |
| Sep 29, 12:53 AM CDT | Areal Flood Advisory | EWX | Frio, Zavala | 2 hr |
| Sep 29, 1:21 AM CDT | Flash Flood Warning | EWX | Frio, Zavala | 3 hr |
| Sep 29, 2:23 AM CDT | Special Weather Statement | EWX | Atascosa | 67 min |
| Sep 29, 3:01 AM CDT | Areal Flood Advisory | EWX | Bexar | 119 min |
| Sep 29, 4:37 AM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 113 min |
| Sep 29, 5:44 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 106 min |
| Sep 29, 12:53 PM CDT | River Flood Warning | EWX | Val Verde | 8 hr |
| Sep 29, 3:33 PM CDT | Areal Flood Advisory | EWX | Karnes | 117 min |
| Sep 29, 4:57 PM CDT | Areal Flood Advisory | EWX | Gonzales, Lavaca | 2 hr |
| Sep 29, 6:38 PM CDT | Areal Flood Advisory | EWX | Lavaca | 112 min |
Nearby
Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012
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.