Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 38, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 10, 2012, 10:42 PM CDT for 7 counties in Texas. It was in force for 4 hr. 2 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, 10:42 PM CDT (03:42 UTC)
- Expired
- May 11, 2012, 2:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bastrop County, TX, Caldwell County, TX, Guadalupe County, TX, Hays County, TX, Lee County, TX, Travis County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 50 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 11:30 PM CDT | FLASH FLOOD | N Austin, TX | SEVERAL ROADS IN AUSTIN CLOSED DUE TO FLOODED ROADWAYS |
| May 10, 11:53 PM CDT | FLASH FLOOD | 3 Ese Bastrop, TX | WATER FLOODING A HOME ON PINE HILL LOOP. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 3.7 hours before the alert went out and 283 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
- 2214 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 636 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 14.5
The text
As transmitted, in the capitals the NWS used until 2016.
840
WGUS54 KEWX 110342
FFWEWX
TXC021-055-187-209-287-453-491-110730-
/O.NEW.KEWX.FF.W.0038.120511T0342Z-120511T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1042 PM CDT THU MAY 10 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BASTROP COUNTY...
CALDWELL COUNTY...
NORTHERN GUADALUPE COUNTY...
HAYS COUNTY...
LEE COUNTY...
TRAVIS COUNTY...
WILLIAMSON COUNTY...
* UNTIL 230 AM CDT.
* AT 1042 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT FLASH FLOODING CONTINUES ALONG AND EAST OF THE
I-35 FROM NEW BRAUNFELS TO GEORGETOWN. HEAVY RAINS ONE TO
THREE INCHES ARE LIKELY AS A LINE OF STORMS MOVE EAST ACROSS
GUADALUPE...CALDWELL...BASTROP...AND LEE COUNTIES.
NUMEROUS REPORTS OF FLOODED LOW WATER CROSSINGS HAVE ALREADY BEEN
REPORTED IN THE AUSTIN METRO AREA. THE EXPECTED ADDITIONAL RAINFALL
AMOUNTS OF 1 TO 3 INCHES WILL LIKELY EXACERBATE THIS FLOODING.
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 2972 9760 2953 9777 2957 9811 2982 9798
3004 9826 3091 9779 3088 9762 3076 9729
3071 9725 3047 9715 3056 9697 3056 9693
3047 9689 3033 9674 3031 9667
$$1 follow-up statement
452
WGUS74 KEWX 110448
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1148 PM CDT THU MAY 10 2012
TXC021-055-187-209-287-453-491-110730-
/O.CON.KEWX.FF.W.0038.000000T0000Z-120511T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUADALUPE TX-HAYS TX-LEE TX-TRAVIS TX-WILLIAMSON TX-CALDWELL TX-
BASTROP TX-
1148 PM CDT THU MAY 10 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
BASTROP...CALDWELL...WILLIAMSON...TRAVIS...LEE...HAYS AND NORTHERN
GUADALUPE COUNTIES...
AT 1143 PM CDT...SEVERAL ROADS IN AUSTIN ARE CLOSED DUE TO FLOODED
ROADWAYS. EVEN THOUGH...SHOWERS AND THUNDERSTORMS HAVE MOVED EAST
AND OUT FROM MOST OF THE AFFECTED AREAS...FLOODING WILL CONTINUE AS
FLOODED WATER SLOWLY RESIDE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
&&
LAT...LON 2972 9760 2953 9777 2957 9811 2982 9798
3004 9826 3091 9779 3088 9762 3076 9729
3071 9725 3047 9715 3056 9697 3056 9693
3047 9689 3033 9674 3031 9667
$$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, 8:02 PM CDT | Flash Flood Warning | EWX | Hays, Travis, Williamson | 118 min |
| 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 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.