Alert archive / Texas / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 9, 2011, 5:13 AM CDT for Burnet County, Travis County, Williamson 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
- Oct 9, 2011, 5:13 AM CDT (10:13 UTC)
- Expired
- Oct 9, 2011, 8:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burnet County, TX, Travis County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 48 km from the middle of the area, began a volume at 10:16 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
Fort Worth, TX (KFWD), launched 00:00Z, 10.2 hours before the alert went out and 257 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
- 238 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1137 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 277 m²/s²
- 0-3 km storm-relative helicity
- 427 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.5
The text
As transmitted, in the capitals the NWS used until 2016.
399
WGUS54 KEWX 091013
FFWEWX
TXC053-453-491-091300-
/O.NEW.KEWX.FF.W.0008.111009T1013Z-111009T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
513 AM CDT SUN OCT 9 2011
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN BURNET COUNTY...
TRAVIS COUNTY...
WILLIAMSON COUNTY...
* UNTIL 800 AM CDT.
* AT 512 AM 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. RAINFALL REPORTS JUST WEST OF THE WARNED AREA SUGGEST THAT
RAINFALL AMOUNTS OF 2 TO 3 INCHES WILL FALL OVER THE AUSTIN METRO
AREA BY 7 AM.
* 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...
GEORGETOWN...GRANGER...PFLUGERVILLE...ROUND ROCK...SERENADA...
TANGLEWOOD FOREST...WINDEMERE...ANDICE...BARTLETT...BEE CAVE...
FLORENCE...GEORGETOWN DAM...HUTTO...JARRELL...LAGO VISTA...
LAKEWAY...LEANDER...LIBERTY HILL...MAHOMET...MANSFIELD DAM...ONION
CREEK...ROLLINGWOOD...SUN CITY...WEIR AND WEST LAKE HILLS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE WHERE WATER COVERS THE ROAD. EVEN SUVS AND PICKUPS WILL
BE SWEPT AWAY BY AS LITTLE AS TWO FEET OF RUSHING WATER. TURN AROUND
DON'T DROWN.
&&
LAT...LON 3087 9759 3076 9736 3003 9771 3029 9809
3032 9812 3043 9808 3045 9815 3079 9799
3092 9785
$$1 follow-up statement
235
WGUS74 KEWX 091139
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
639 AM CDT SUN OCT 9 2011
TXC053-453-491-091300-
/O.CON.KEWX.FF.W.0008.000000T0000Z-111009T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-WILLIAMSON TX-BURNET TX-
639 AM CDT SUN OCT 9 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 AM CDT FOR
SOUTHEASTERN BURNET...WILLIAMSON AND TRAVIS COUNTIES...
AT 630 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A THUNDERSTORM COMPLEX PRODUCING HEAVY RAINS AND POSSIBLE
FLASH FLOODING OVER MUCH OF TRAVIS...WILLIAMSON...AND SOUTHEASTERN
BURNET COUNTIES.
OVER THE PAST 3 HOURS...DOPPLER RADAR ESTIMATES AND GROUND REPORTS
SUGGEST THAT MANY LOCATIONS HAVE RECEIVED RAINFALL AMOUNTS IN EXCESS
OF 2 INCHES...WITH ISOLATED HIGHER RAINFALL AMOUNTS UP TO 4 INCHES.
MODERATE TO OCCASIONAL HEAVY RAINFALL RATES OF AROUND HALF AN INCH
PER HOUR WILL CONTINUE ACROSS MUCH OF THE WARNING AREA THROUGH AT
LEAST 730 AM.
LOCATIONS IN THE WARNING AREA INCLUDE SUN CITY...MAHOMET...LIBERTY
HILL...WEIR...SERENADA...LEANDER...JARRELL...HUTTO...GRANGER...
GEORGETOWN DAM...GEORGETOWN...FLORENCE...BARTLETT AND ANDICE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
&&
LAT...LON 3087 9759 3076 9736 3003 9771 3029 9809
3032 9812 3043 9808 3045 9815 3079 9799
3092 9785
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 7:46 PM CDT | Areal Flood Advisory | EWX | Edwards, Val Verde | 104 min |
| Oct 8, 9:29 PM CDT | Areal Flood Advisory | EWX | Edwards, Val Verde | 2 hr |
| Oct 8, 11:15 PM CDT | Areal Flood Advisory | EWX | Bandera, Edwards, Kerr, Medina, Real, Uvalde | 105 min |
| Oct 8, 11:28 PM CDT | Areal Flood Advisory | EWX | Maverick | 2 hr |
| Oct 9, 12:49 AM CDT | Areal Flood Advisory | EWX | Bandera, Frio, Gillespie, Kendall, Kerr, Llano and 1 more | 3 hr |
| Oct 9, 1:35 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Blanco, Burnet, Comal, Gillespie and 3 more | 3 hr |
| Oct 9, 2:38 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Kendall | 3 hr |
| Oct 9, 3:02 AM CDT | Flash Flood Watch | EWX | Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 14 more | 12 hr |
| Oct 9, 3:21 AM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe, Hays, Kendall | 2 hr |
| Oct 9, 3:28 AM CDT | Areal Flood Advisory | EWX | Blanco, Burnet, Comal, Hays, Kendall, Travis and 1 more | 3 hr |
| Oct 9, 3:41 AM CDT | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe | 34 min |
| Oct 9, 4:04 AM CDT | Flash Flood Warning | EWX | Comal, Hays | 3 hr |
| Oct 9, 4:25 AM CDT | Flash Flood Warning | EWX | Burnet, Llano | 3 hr |
| Oct 9, 5:41 AM CDT | Areal Flood Advisory | EWX | Bexar | 3 hr |
| Oct 9, 6:21 AM CDT | Areal Flood Advisory | EWX | Dimmit, Maverick, Zavala | 3 hr |
| Oct 9, 8:04 AM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 116 min |
| Oct 9, 10:33 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Comal, Guadalupe, Wilson | 117 min |
Nearby
Flash Flood Warnings in Texas, 2011Every flash flood warning in 2011
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.