Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 64, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 29, 2012, 1:21 AM CDT for Frio County, Zavala 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 29, 2012, 1:21 AM CDT (06:21 UTC)
- Expired
- Sep 29, 2012, 4:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Frio County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 113 km from the middle of the area, began a volume at 06:22 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, 6.4 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
- 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.
774 WGUS54 KEWX 290621 FFWEWX TXC163-507-290930- /O.NEW.KEWX.FF.W.0064.120929T0621Z-120929T0930Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 121 AM CDT SAT SEP 29 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... FRIO COUNTY... EAST CENTRAL ZAVALA COUNTY... * UNTIL 430 AM CDT. * AT 119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS WESTERN FRIO INTO EASTERN ZAVALA COUNTY. RAINFALL AMOUNTS OF 2 TO 4 INCHES CAN BE EXPECTED FROM FRIO TOWN TO 10 MILES SOUTHEAST OF BATESVILLE EAST TO I-35 FROM MOORE TO DILLEY. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... PEARSALL...BLUFF...DERBY...DIVOT...FRIO TOWN...LOMA VISTA AND MOORE. 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 2908 9892 2867 9901 2869 9966 2905 9946 $$
1 follow-up statement
177 WGUS74 KEWX 290720 FFSEWX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 220 AM CDT SAT SEP 29 2012 TXC163-507-290930- /O.CON.KEWX.FF.W.0064.000000T0000Z-120929T0930Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FRIO TX-ZAVALA TX- 220 AM CDT SAT SEP 29 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR EAST CENTRAL ZAVALA AND FRIO COUNTIES... AT 218 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER PEARSALL. HOWEVER...THE RAINFALL RATES WERE RAPIDLY DECREASING TO NEAR 1 INCH PER HOUR. EARLIER HEAVY RAINFALL WILL CONTINUE TO PRODUCE FLASH FLOODING FROM FRIO TOWN TO 10 MILES SOUTHEAST OF BATESVILLE. LOCATIONS IN THE WARNING AREA INCLUDE BLUFF...PEARSALL...MOORE AND FRIO TOWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. && LAT...LON 2908 9892 2867 9901 2869 9966 2905 9946 $$
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 28, 10:41 PM CDT | Flash Flood Warning | EWX | Dimmit | 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, 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.