Alert archive / Texas / Flash Flood Warnings in 2007
Flash Flood Warning 337, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 7, 2007, 8:04 PM CDT for Williamson County, Texas. It was in force for 2 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 2007, 8:04 PM CDT (01:04 UTC)
- Expired
- Jul 7, 2007, 10:15 PM CDT
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Williamson County, TX
The radar
The Ft Hood radar (KGRK), 22 km from the middle of the area, began a volume at 01:08 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 |
|---|---|---|---|
| Jul 7, 8:10 PM CDT | FLASH FLOOD | Georgetown, TX | COUNTY ROAD 100 CLOSED. |
| Jul 7, 8:10 PM CDT | FLASH FLOOD | Liberty Hill, TX | COUNTY ROAD 214 CLOSED. |
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, 1.1 hours before the alert went out and 245 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
- 1133 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1761 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 080105
FFWEWX
TXC491-080315-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
804 PM CDT SAT JUL 7 2007
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
WILLIAMSON COUNTY IN SOUTH CENTRAL TEXAS...
THIS INCLUDES THE CITIES OF...SERENADA...GEORGETOWN...
* UNTIL 1015 PM CDT
* AT 800 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED
TO DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES WEST OF LIBERTY
HILL TO LIBERTY HILL TO GEORGETOWN TO HUTTO WHILE OTHER STORMS
SOUTHWEST OF CEDAR PARK AND LIBERTY HILL MOVE INTO THE LINE.
RAINFALL RATES OF 2 TO 4 INCHES PER HOUR WERE NOTED. THESE RAINS
CAUSE RISES OUT OF BANKS AND POSSIBLY INTO FLOOD ALONG THE SOUTH
AND MIDDLE FORKS OF THE SAN GABRIEL RIVER AND THEIR TRIBUTARIES
IN AND WEST OF GEORGETOWN INCLUDING HIGHWAY 29 AND FM 2338.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LIBERTY
HILL...WEIR AND GEORGETOWN DAM
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 DONT DROWN.
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
LAT...LON 3052 9783 3054 9754 3075 9753 3077 9798
3067 9801
$$2 follow-up statements
000
WGUS74 KEWX 080140
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
839 PM CDT SAT JUL 7 2007
TXC491-080315-
WILLIAMSON TX-
839 PM CDT SAT JUL 7 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR
WILLIAMSON COUNTY...
AT 832 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED RAINS RAPIDLY
WEAKENING ACROSS WILLIAMSON COUNTY. HIGHEST RAINFALL RATES WERE NOW
NEAR ONE QUARTER INCH PER HOUR. HOWEVER...EARLIER VERY HEAVY RAINS
UP TO 5 INCHES WILL CAUSE CONTINUED RISES OUT OF BANKS AND POSSIBLY
INTO FLOOD ALONG THE SOUTH AND MIDDLE FORKS OF THE SAN GABRIEL RIVER
AND THEIR TRIBUTARIES IN AND WEST OF GEORGETOWN. THIS WILL IMPACT
AREAS ALONG HIGHWAY 29 AND FM 2338.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LIBERTY
HILL...WEIR...SERENADA AND GEORGETOWN DAM
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DONT DROWN.
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
WITH SUNSET APPROACHING...IT IS HARD TO RECOGNIZE THE DANGERS OF
FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN
FLOOD PRONE AREAS.
LAT...LON 3052 9783 3054 9754 3075 9753 3077 9798
3067 9801
$$000
WGUS74 KEWX 080325
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1022 PM CDT SAT JUL 7 2007
TXC491-080332-
WILLIAMSON TX-
1022 PM CDT SAT JUL 7 2007
...THE FLASH FLOOD WARNING HAS EXPIRED FOR WILLIAMSON COUNTY...
AT 1015 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED THE RAINS
HAVE ENDED ACROSS WILLIAMSON COUNTY. THE THREAT FOR FLASH FLOODING
HAS ENDED. AS A RESULT...THE FLASH FLOOD WARNING WAS ALLOWED TO
EXPIRE. HOWEVER...SOME RIVERS AND CREEKS WILL REMAIN OUT OF BANKS
AND LOW LYING AREAS WILL EXPERIENCE PONDING OF WATER THE NEXT FEW
HOURS DUE TO THE EARLIER VERY HEAVY RAINS UP TO 6 INCHES. SEE
HYDROLOGIC STATEMENTS FOR DETAILS.
LAT...LON 3052 9783 3054 9754 3075 9753 3077 9798
3067 9801
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 6:45 AM CDT | Flash Flood Warning | EWX | Bandera, Real, Uvalde | 4 hr |
| Jul 8, 2:38 PM CDT | River Flood Warning | EWX | Karnes | 18 hr |
Nearby
Flash Flood Warnings in Texas, 2007Every flash flood warning in 2007
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.