Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 46, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 11, 2012, 4:38 PM CDT for Bexar County, Comal County, Guadalupe County, Texas. It was in force for 4 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
- Jul 11, 2012, 4:38 PM CDT (21:38 UTC)
- Expired
- Jul 11, 2012, 8:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bexar County, TX, Comal County, TX, Guadalupe County, TX
The radar
The Austin/San Antonio radar (KEWX), 15 km from the middle of the area, began a volume at 21:40 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
Corpus Christi, TX (KCRP), launched 12:00Z, 9.6 hours before the alert went out and 219 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
- 2040 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 702 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
162
WGUS54 KEWX 112138
FFWEWX
TXC029-091-187-120130-
/O.NEW.KEWX.FF.W.0046.120711T2138Z-120712T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
438 PM CDT WED JUL 11 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL BEXAR COUNTY...
SOUTHERN COMAL COUNTY...
WESTERN GUADALUPE COUNTY...
* UNTIL 830 PM CDT.
* AT 437 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 ESTIMATES SUGGEST 2 TO 4 INCHES OF RAINFALL
HAS OCCURRED SO FAR THIS AFTERNOON OVER THE I-35 CORRIDOR FROM
UNIVERSAL CITY TO NEW BRAUNFELS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...NEW
BRAUNFELS...SEGUIN...UNIVERSAL CITY...CIBOLO...GARDEN RIDGE...
GERONIMO...LIVE OAK...MARION...MCQUEENEY...NEW BERLIN...SCHERTZ...
SELMA...ST. HEDWIG...WINDCREST AND ZORN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2941 9813 2942 9813 2942 9816 2934 9822
2958 9846 2982 9804 2980 9801 2976 9799
2978 9798 2969 9785
$$1 follow-up statement
658
WGUS74 KEWX 112259
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
559 PM CDT WED JUL 11 2012
TXC029-091-187-120130-
/O.CON.KEWX.FF.W.0046.000000T0000Z-120712T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUADALUPE TX-BEXAR TX-COMAL TX-
559 PM CDT WED JUL 11 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHERN COMAL...EAST CENTRAL BEXAR AND WESTERN GUADALUPE COUNTIES...
AT 546 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT AN AREA OF MODERATE TO HEAVY RAINS OVER THE WARNED AREA.
AREAS EAST OF I-35 FROM UNIVERSAL CITY TO GERONIMO AND ZORN. AS OF
521 PM CDT...2.42 INCHES WAS REPORTED AT THE NEW BRAUNFELS AIRPORT
SINCE 1 PM...AND SOILS REMAIN SATURATED IN THIS AREA FROM RECENT
RAINFALL.
LOCATIONS IN THE WARNING AREA INCLUDE ZORN...GERONIMO...NEW BRAUNFELS
AND GARDEN RIDGE. LOW WATER CROSSINGS ARE LIKELY FLOODED OVER
PORTIONS OF COMAL AND GUADALUPE COUNTY EAST OF I-35 AND NORTH OF
HIGHWAY 78.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2941 9813 2942 9813 2942 9816 2934 9822
2958 9846 2982 9804 2980 9801 2976 9799
2978 9798 2969 9785
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:02 PM CDT | Areal Flood Advisory | EWX | Edwards, Kinney, Val Verde | 3 hr |
| Jul 10, 7:13 PM CDT | Areal Flood Advisory | EWX | Williamson | 107 min |
| Jul 10, 7:37 PM CDT | Flash Flood Warning | EWX | Edwards, Kinney, Real, Uvalde | 4 hr |
| Jul 10, 8:50 PM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 2 hr |
| Jul 10, 9:29 PM CDT | Flash Flood Warning | EWX | Travis | 3 hr |
| Jul 10, 9:36 PM CDT | Areal Flood Advisory | EWX | Blanco, Hays | 3 hr |
| Jul 11, 2:00 AM CDT | Areal Flood Advisory | EWX | Gonzales, Guadalupe, Wilson | 3 hr |
| Jul 11, 6:05 AM CDT | Areal Flood Advisory | EWX | DeWitt, Gonzales, Wilson | 3 hr |
| Jul 11, 6:59 AM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe, Wilson | 2 hr |
| Jul 11, 8:16 AM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
| Jul 11, 3:19 PM CDT | Areal Flood Advisory | EWX | Atascosa, Bastrop, Bexar, Caldwell, Comal, Guadalupe and 4 more | 4 hr |
| Jul 11, 4:00 PM CDT | Areal Flood Advisory | EWX | Dimmit, Maverick, Zavala | 3 hr |
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.