Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 12, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Feb 3, 2012, 10:51 PM CST for Bexar County, Texas. It was in force for 3 hr. 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
- Feb 3, 2012, 10:51 PM CST (04:51 UTC)
- Expired
- Feb 4, 2012, 2:00 AM CST
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 40 km from the middle of the area, began a volume at 04:53 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 |
|---|---|---|---|
| Feb 3, 10:51 PM CST | FLASH FLOOD | 3 Wnw Castle Hills, TX | VANCE JACKSON AND SUGAR HILL STREET CLOSED. |
| Feb 3, 10:55 PM CST | HEAVY RAIN 2.25 | Castle Hills, TX | |
| Feb 3, 11:50 PM CST | FLASH FLOOD | 1 Nne Terrell Hills, TX | VANDIVER ROAD AND EISENHAUER ROAD CLOSED. |
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, 4.9 hours before the alert went out and 228 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
- 2376 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
744
WGUS54 KEWX 040451
FFWEWX
TXC029-040800-
/O.NEW.KEWX.FF.W.0012.120204T0451Z-120204T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1051 PM CST FRI FEB 3 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL BEXAR COUNTY...
* UNTIL 200 AM CST.
* AT 1050 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING ACROSS CENTRAL BEXAR COUNTY. RAINFALL RATES ARE
ESTIMATED AT 3 TO 4 INCHES AN HOUR. MOVEMENT IS EAST AT 15 MPH.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...SAN
ANTONIO...UNIVERSAL CITY...ALAMO HEIGHTS...HILL COUNTRY VILLA...
HOLLYWOOD PARK...KIRBY...LEON VALLEY...LIVE OAK...OLMOS PARK...
SELMA...SHAVANO PARK...TERRELL HILLS AND WINDCREST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2960 9863 2965 9835 2962 9834 2959 9831
2956 9830 2954 9826 2943 9822 2939 9861
$$4 follow-up statements
905
WGUS74 KEWX 040519
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1119 PM CST FRI FEB 3 2012
TXC029-040800-
/O.CON.KEWX.FF.W.0012.000000T0000Z-120204T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
1119 PM CST FRI FEB 3 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM CST FOR
CENTRAL BEXAR COUNTY...
AT 1112 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A THUNDERSTORM PRODUCING FLASH FLOODING OVER SAN ANTONIO...
BETWEEN CASTLE HILLS...ALAMO HEIGHTS AND DOWNTOWN...MOVING EAST AT
10 MPH. EXPECT TORRENTIAL DOWNPOURS TO PRODUCE RAINFALL RATES BETWEEN
3 AND 4 INCHES PER HOUR WITH THIS STORM.
OTHER LOCATIONS IN THE WARNING AREA INCLUDE TERRELL HILLS...KIRBY...
WINDCREST...LIVE OAK...SELMA AND UNIVERSAL CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
&&
LAT...LON 2960 9863 2965 9835 2962 9834 2959 9831
2956 9830 2954 9826 2943 9822 2939 9861
$$287
WGUS74 KEWX 040613
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1213 AM CST SAT FEB 4 2012
TXC029-040800-
/O.CON.KEWX.FF.W.0012.000000T0000Z-120204T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
1213 AM CST SAT FEB 4 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM CST FOR
CENTRAL BEXAR COUNTY...
AT 1206 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT THUNDERSTORMS PRODUCING FLASH FLOODING FROM NEAR KELLY FIELD
TO BALCONES HEIGHTS TO SAN ANTONIO INTERNATIONAL AIRPORT AND FROM
KIRBY TO SCHERTZ. RAINFALL RATES OF 2 TO 4 INCHES PER HOUR CAN BE
EXPECTED.
LOCATIONS IN THE WARNING AREA INCLUDE UNIVERSAL CITY...SHAVANO
PARK...LIVE OAK...HOLLYWOOD PARK...HILL COUNTRY VILLA AND SELMA.
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.
&&
LAT...LON 2960 9863 2965 9835 2962 9834 2959 9831
2956 9830 2954 9826 2943 9822 2939 9861
$$986
WGUS74 KEWX 040709
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
109 AM CST SAT FEB 4 2012
TXC029-040800-
/O.CON.KEWX.FF.W.0012.000000T0000Z-120204T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
109 AM CST SAT FEB 4 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM CST FOR
CENTRAL BEXAR COUNTY...
AT 100 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A THUNDERSTORM PRODUCING FLASH FLOODING. THIS STORM WAS
LOCATED NEAR TERRELL HILLS...OR NEAR SAN ANTONIO...MOVING EAST AT 10
MPH. AN ADDITIONAL INCH OF RAIN CAN BE EXPECTED.
OTHER LOCATIONS IN THE WARNING AREA INCLUDE KIRBY...WINDCREST...LIVE
OAK...SELMA AND UNIVERSAL CITY.
RADAR ESTIMATES SHOW THAT UP TO 6 INCHES OF RAIN HAS ALREADY FALLEN.
LEON CREEK...ZARZAMORA CREEK...OLMOS CREEK...SALADO CREEK...AND
MARTINEZ CREEK MAY RUN OUT OF BANKS FOR THE NEXT HOUR OR SO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2960 9863 2965 9835 2962 9834 2959 9831
2956 9830 2954 9826 2943 9822 2939 9861
$$080
WGUS74 KEWX 040802
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
202 AM CST SAT FEB 4 2012
TXC029-040809-
/O.EXP.KEWX.FF.W.0012.000000T0000Z-120204T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
202 AM CST SAT FEB 4 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 200 AM CST FOR CENTRAL
BEXAR COUNTY...
THE RAINS HAVE ENDED ACROSS CENTRAL BEXAR COUNTY. THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER...EARLIER HEAVY RAINS OF
UP TO 6 INCHES MAY CAUSE LEON CREEK...ZARZAMORA CREEK...OLMOS
CREEK...SALADO CREEK...AND MARTINEZ CREEK TO RUN HIGH FOR THE NEXT
HOUR OR SO.
LAT...LON 2960 9863 2965 9835 2962 9834 2959 9831
2956 9830 2954 9826 2943 9822 2939 9861
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 3, 9:18 PM CST | Areal Flood Advisory | EWX | Bexar | 2 hr |
| Feb 3, 9:45 PM CST | Areal Flood Advisory | EWX | Williamson | 105 min |
| Feb 3, 10:02 PM CST | Flash Flood Warning | EWX | Bexar | 118 min |
| Feb 3, 10:15 PM CST | Severe Thunderstorm Warning | EWX | Bexar | 30 min |
| Feb 3, 10:36 PM CST | Flash Flood Warning | EWX | Williamson | 114 min |
| Feb 3, 10:38 PM CST | Severe Thunderstorm Warning | EWX | Bexar | 37 min |
| Feb 3, 11:15 PM CST | Severe Thunderstorm Warning | EWX | Bexar, Guadalupe | 60 min |
| Feb 4, 12:15 AM CST | Severe Thunderstorm Warning | EWX | Bexar, Guadalupe, Wilson | 45 min |
| Feb 4, 12:57 AM CST | Areal Flood Advisory | EWX | Burnet | 2 hr |
| Feb 4, 1:07 AM CST | Areal Flood Advisory | EWX | Hays, Travis | 113 min |
| Feb 4, 1:25 AM CST | Flash Flood Warning | EWX | Travis, Williamson | 3 hr |
| Feb 4, 1:54 AM CST | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 2 hr |
| Feb 4, 2:32 AM CST | Areal Flood Advisory | EWX | Bandera, Medina | 118 min |
| Feb 4, 2:42 AM CST | Flash Flood Warning | EWX | Hays, Travis | 3 hr |
| Feb 4, 3:11 AM CST | Areal Flood Advisory | EWX | Bandera, Bexar, Medina | 109 min |
| Feb 4, 3:27 AM CST | Areal Flood Advisory | EWX | Bastrop, Caldwell, Hays, Lee, Travis | 2 hr |
| Feb 4, 4:06 AM CST | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe | 114 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.