Alert archive / Texas / Flash Flood Warnings in 2009
Flash Flood Warning 21, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 11, 2009, 8:09 PM CDT for Burnet County, Llano County, Williamson County, Texas. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2009, 8:09 PM CDT (01:09 UTC)
- Expired
- Jun 11, 2009, 10:00 PM CDT
- In force
- 111 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burnet County, TX, Llano County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 83 km from the middle of the area, began a volume at 01:10 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, 1.2 hours before the alert went out and 241 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
- 2849 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1048 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 120109
FFWEWX
TXC053-299-491-120300-
/O.NEW.KEWX.FF.W.0021.090612T0109Z-090612T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
809 PM CDT THU JUN 11 2009
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BURNET COUNTY...
NORTHERN LLANO COUNTY...
NORTHWESTERN WILLIAMSON COUNTY...
* UNTIL 1000 PM CDT.
* AT 807 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
RAINFALL ESTIMATES OF TWO TO THREE INCHES PER HOUR FROM DOPPLER
RADAR INDICATE FLASH FLOODING FROM THUNDERSTORMS BETWEEN VALLEY
SPRING AND LIBERTY HILL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 3093 9783 3058 9787 3059 9793 3063 9797
3062 9803 3063 9804 3061 9806 3073 9887
3091 9890 3094 9881 3093 9843 3095 9846
3101 9847 3104 9844 3105 9791
$$1 follow-up statement
000
WGUS74 KEWX 120200
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
900 PM CDT THU JUN 11 2009
TXC053-299-491-120300-
/O.CON.KEWX.FF.W.0021.000000T0000Z-090612T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BURNET TX-LLANO TX-WILLIAMSON TX-
900 PM CDT THU JUN 11 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHWESTERN WILLIAMSON...NORTHERN LLANO AND BURNET COUNTIES...
AT 856 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED
THAT SHOWERS AND THUNDERSTORMS WERE ON THE DECREASE ACROSS THE
WARNED AREA...BUT RUNOFF FROM EARLIER HEAVY RAINS WILL CONTINUE.
TURN AROUND DONT DROWN
LOCATIONS IN THE WARNING AREA INCLUDE SHADY GROVE...MAHOMET...
JOPPA...SUNNYLANE...LAKE VICTOR...WATSON...LONE GROVE...BLUFFTON...
BABY HEAD...VALLEY SPRING...TOW AND BRIGGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3093 9783 3058 9787 3059 9793 3063 9797
3062 9803 3063 9804 3061 9806 3073 9887
3091 9890 3094 9881 3093 9843 3095 9846
3101 9847 3104 9844 3105 9791
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 7:25 PM CDT | Tornado Warning | EWX | Burnet | 35 min |
| Jun 11, 7:39 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Travis, Williamson | 66 min |
| Jun 11, 7:43 PM CDT | Tornado Warning | EWX | Burnet, Travis, Williamson | 47 min |
| Jun 11, 7:51 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 39 min |
| Jun 11, 8:08 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet, Hays, Travis, Williamson | 67 min |
| Jun 11, 8:27 PM CDT | Tornado Warning | EWX | Travis, Williamson | 33 min |
| Jun 11, 9:03 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 3 hr |
| Jun 11, 9:08 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Lee, Travis, Williamson | 67 min |
| Jun 11, 9:36 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Comal, Guadalupe, Hays, Travis | 54 min |
| Jun 11, 9:58 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 51 min |
| Jun 11, 11:03 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 42 min |
Nearby
Flash Flood Warnings in Texas, 2009Every flash flood warning in 2009
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.