Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 36, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 10, 2012, 8:02 PM CDT for Hays County, Travis County, Williamson County, Texas. It was in force for 118 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 10, 2012, 8:02 PM CDT (01:02 UTC)
- Expired
- May 10, 2012, 10:00 PM CDT
- In force
- 118 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hays County, TX, Travis County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 57 km from the middle of the area, began a volume at 01:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 8:50 PM CDT | HEAVY RAIN 1.28 | 3 Ese Leander, TX | 1.28 INCHES OF RAINFALL IN 20 MINUTES. |
| May 10, 9:05 PM CDT | HEAVY RAIN 2.24 | 1 W Hutto, TX | 2.00 TO 2.24 INCHES IN ABOUT 20 MINUTES. |
| May 10, 9:30 PM CDT | FLASH FLOOD | 3 W Driftwood, TX | SEVERAL ROADS IN AND AROUND DRIFTWOOD CLOSED DUE TO FLOODING... INCLUDING PARTS OF HIGHWAY 12. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 1.0 hours before the alert went out and 278 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2229 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
129
WGUS54 KEWX 110102
FFWEWX
TXC209-453-491-110300-
/O.NEW.KEWX.FF.W.0036.120511T0102Z-120511T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
802 PM CDT THU MAY 10 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
HAYS COUNTY...
TRAVIS COUNTY...
WILLIAMSON COUNTY...
* UNTIL 1000 PM CDT.
* AT 800 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE A
LINE OF THUNDERSTORMS WITH VERY HEAVY RAINFALL APPROACHING
THE AUSTIN METRO AREA FROM THE WEST. RAINFALL AMOUNTS OF BETWEEN
ONE AND TWO INCHES WILL OCCUR IN ONE HOUR OR LESS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ANDERSON MILL...AUSTIN...AUSTIN BERGSTROM INT AP...CEDAR PARK...
DRIPPING SPRINGS...GEORGETOWN...PFLUGERVILLE...ROUND ROCK...
SERENADA...TANGLEWOOD FOREST...TAYLOR...WIMBERLEY...WINDEMERE...
ANDICE...BEE CAVE...BUDA...COUPLAND...DRIFTWOOD...GEORGETOWN DAM...
HUTTO...KYLE...LAGO VISTA...LAKEWAY...LEANDER...LIBERTY HILL...
MANOR...MANSFIELD DAM...MUSTANG RIDGE...ONION CREEK AND
ROLLINGWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
&&
LAT...LON 3058 9726 3043 9739 3041 9737 3021 9749
3002 9771 3005 9775 2985 9799 3006 9826
3033 9814 3035 9817 3046 9810 3051 9812
3062 9805 3062 9801 3083 9791
$$1 follow-up statement
415
WGUS74 KEWX 110246
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
946 PM CDT THU MAY 10 2012
TXC209-453-491-110300-
/O.CON.KEWX.FF.W.0036.000000T0000Z-120511T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAYS TX-TRAVIS TX-WILLIAMSON TX-
946 PM CDT THU MAY 10 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
WILLIAMSON...TRAVIS AND HAYS COUNTIES...
AT 940 PM CDT...A BAND OF THUNDERSTORMS EXTENDED ACROSS MUCH OF
HAYS...TRAVIS AND SOUTHERN WILLIAMSON COUNTIES...MOVING EAST AT 30
MPH. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WERE INDICATED BY
RADAR.
SMALL STREAMS AND CREEKS MAY FLOOD LOW LYING AREAS OVER THE NEXT FEW
HOURS. MOTORISTS SHOULD BE AWARE THAT LOW WATER CROSSINGS MAY BE
EXTREMELY DANGEROUS THE NEXT FEW HOURS. TRAVEL SHOULD BE AT LOW
SPEEDS SO ONE CAN STOP BEFORE DRIVING INTO DANGEROUS CROSSINGS AND
BRIDGES.
LOCATIONS IN THE WARNING AREA INCLUDE SUN CITY...LIBERTY HILL...
WINDEMERE...PFLUGERVILLE...LAKEWAY...LAGO VISTA...WEIR...THRALL...
TAYLOR...SERENADA...ROUND ROCK...LEANDER...HUTTO...GEORGETOWN DAM...
GEORGETOWN...COUPLAND...CEDAR PARK...ANDICE AND ANDERSON MILL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY MORNING FOR
SOUTH CENTRAL TEXAS.
&&
LAT...LON 3058 9726 3043 9739 3041 9737 3021 9749
3002 9771 3005 9775 2985 9799 3006 9826
3033 9814 3035 9817 3046 9810 3051 9812
3062 9805 3062 9801 3083 9791
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:21 PM CDT | Tornado Warning | EWX | Dimmit, Frio, Zavala | 24 min |
| May 10, 7:59 PM CDT | River Flood Warning | EWX | Kerr | 18 hr |
| May 10, 8:26 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 49 min |
| May 10, 8:32 PM CDT | River Flood Warning | EWX | Val Verde | 30 hr |
| May 10, 8:34 PM CDT | Areal Flood Advisory | EWX | Bexar | 116 min |
| May 10, 9:10 PM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe, Hays | 3 hr |
| May 10, 9:59 PM CDT | Areal Flood Advisory | EWX | Bastrop, Caldwell, Comal, Guadalupe, Hays, Lee and 2 more | 2 hr |
| May 10, 10:42 PM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Guadalupe, Hays, Lee, Travis and 1 more | 4 hr |
| May 11, 12:06 AM CDT | Flash Flood Warning | EWX | Bexar, Comal | 3 hr |
| May 11, 2:37 AM CDT | Flash Flood Warning | EWX | Hays | 113 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.