Alert archive / Texas / Flash Flood Warnings in 2009
Flash Flood Warning 2, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 18, 2009, 6:45 AM CDT for 8 counties in Texas. It was in force for 4 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
- Apr 18, 2009, 6:45 AM CDT (11:45 UTC)
- Expired
- Apr 18, 2009, 10:45 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bastrop County, TX, Bexar County, TX, Caldwell County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Lee County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 34 km from the middle of the area, began a volume at 11:45 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 |
|---|---|---|---|
| Apr 18, 8:50 AM CDT | FLASH FLOOD | 2 N Nixon, TX | HIGHWAYS 80 AND 97 AND 87 WERE CLOSED FOR A SHORT TIME. |
| Apr 18, 9:00 AM CDT | FLASH FLOOD | 3 Nw Giddings, TX | FM2440 WAS CLOSED |
| Apr 18, 9:15 AM CDT | FLASH FLOOD | 5 E Seguin, TX | NASH CREEK ROAD WAS CLOSED...ALONG WITH A PART OF HIGHWAY 90E...DUE TO 6.34 INCHES OF RAINFALL IN LESS THAN 3 HOURS. |
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, 11.8 hours before the alert went out and 236 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
- 3044 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 729 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -85 m²/s²
- Significant tornado parameter
- -0.6
- Supercell composite
- -2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 181145
FFWEWX
TXC021-029-055-149-177-187-287-493-181545-
/O.NEW.KEWX.FF.W.0002.090418T1145Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
645 AM CDT SAT APR 18 2009
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BASTROP COUNTY...
BEXAR COUNTY...
CALDWELL COUNTY...
WESTERN FAYETTE COUNTY...
GONZALES COUNTY...
GUADALUPE COUNTY...
LEE COUNTY...
WILSON COUNTY...
* UNTIL 1045 AM CDT.
* AT 639 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM
A THUNDERSTORM OVER THE WARNED AREA.
A LARGE COMPLEX OF THUNDERSTORMS IS MOVING SLOWLY NORTH ACROSS AN
AREA THAT HAS ALREADY SATURATED FROM RECENT RAINFALL. RAINFALL
AMOUNTS OF 2 TO 3 INCHES CAN BE EXPECTED IN THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 3009 9694 2964 9713 2893 9820 2911 9838
2922 9869 2952 9865 2966 9835 2962 9835
2960 9832 2969 9809 2985 9792 2994 9772
3039 9728 3041 9733 3057 9697 3033 9675
3031 9665
$$4 follow-up statements
000
WGUS74 KEWX 181229
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
729 AM CDT SAT APR 18 2009
TXC021-029-055-149-177-187-287-493-181545-
/O.CON.KEWX.FF.W.0002.000000T0000Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEE TX-BASTROP TX-FAYETTE TX-CALDWELL TX-GUADALUPE TX-GONZALES TX-
BEXAR TX-WILSON TX-
729 AM CDT SAT APR 18 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR
WILSON...SOUTHEASTERN BEXAR...GONZALES...GUADALUPE...CALDWELL...
WESTERN FAYETTE...BASTROP AND LEE COUNTIES...
AT 729 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT NUMEROUS THUNDERSTORMS PRODUCING FLASH FLOODING RAINS OVER
THE WARNED AREA.
THE HEAVIEST RAINFALL HAS OCCURRED FROM BRAUNIG LAKE IN SOUTH BEXAR
COUNTY TO LAVERNIA AND NEW BERLIN...EXTENDING NORTHEAST TO
LULING...BASTROP...AND GIDDINGS. OVER THE PAST THREE HOURS...DOPPLER
RAINFALL ESTIMATES SUGGEST THAT 2 TO 3 INCHES HAS FALLEN OVER MUCH
OF THIS AREA...WITH ISOLATED 4 INCH TOTALS POSSIBLE. THIS RAINFALL
IS IN ADDITION TO THE LOCALLY HEAVY RAINFALL TOTALS THAT HAD FALLEN
ON FRIDAY.
NUMEROUS THUNDERSTORMS CONTINUE TO SLOWLY MOVE THROUGH THE
AREA...BUT WILL DECREASE FROM WEST TO EAST THROUGH 9 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DONT DROWN. A SEVERE THUNDERSTORM WATCH REMAINS
IN EFFECT UNTIL 1100 AM CDT SATURDAY MORNING FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3009 9694 2964 9713 2893 9820 2911 9838
2914 9846 2960 9834 2979 9789 3039 9728
3041 9733 3046 9716 3057 9697 3033 9675
3031 9665
$$000
WGUS74 KEWX 181337
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
837 AM CDT SAT APR 18 2009
TXC021-029-055-149-177-187-287-493-181545-
/O.CON.KEWX.FF.W.0002.000000T0000Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEE TX-BASTROP TX-FAYETTE TX-CALDWELL TX-GUADALUPE TX-GONZALES TX-
BEXAR TX-WILSON TX-
837 AM CDT SAT APR 18 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR
WILSON...SOUTHEASTERN BEXAR...GONZALES...GUADALUPE...CALDWELL...
WESTERN FAYETTE...BASTROP AND LEE COUNTIES...
AT 832 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA.
HEAVY RAINS WERE NOTED NEAR GONZALES AND BETWEEN WAEDLER...MULDOON
AND ROSANKY. RAINFALL RATES OF NEAR 2 INCHES PER HOUR WERE
ESTIMATED. ELSEWHERE...ISOLATED SHOWERS AND LIGHT TO MODERATE RAINS
WERE NOTED.
LOCATIONS IN THE WARNING AREA INCLUDE WYLDWOOD...TANGLEWOOD...
SMITHVILLE...ROSANKY...PAIGE...LEXINGTON...GIDDINGS...FEDOR...DIME
BOX...CIRCLE D-KC ESTATES...CEDAR CREEK...CAMP SWIFT AND BASTROP.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 3009 9694 2964 9713 2893 9820 2911 9838
2914 9846 2960 9834 2979 9789 3039 9728
3041 9733 3046 9716 3057 9697 3033 9675
3031 9665
$$000
WGUS74 KEWX 181418
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
918 AM CDT SAT APR 18 2009
TXC029-181426-
/O.CAN.KEWX.FF.W.0002.000000T0000Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
918 AM CDT SAT APR 18 2009
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN BEXAR
COUNTY...
ONLY PATCHY LIGHT SHOWERS WILL CONTINUE. THE THREAT FOR FLASH
FLOODING HAS ENDED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM CDT
SATURDAY MORNING FOR SOUTH CENTRAL TEXAS.
LAT...LON 3009 9694 2964 9713 2918 9788 2931 9792
2970 9777 2991 9751 3039 9728 3057 9697
3033 9675 3031 9665
$$
TXC021-055-149-177-187-287-493-181545-
/O.CON.KEWX.FF.W.0002.000000T0000Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEE TX-BASTROP TX-FAYETTE TX-CALDWELL TX-GUADALUPE TX-GONZALES TX-
WILSON TX-
918 AM CDT SAT APR 18 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT FOR
NORTHEASTERN WILSON...GONZALES...SOUTHEASTERN GUADALUPE...
SOUTHEASTERN CALDWELL...WESTERN FAYETTE...BASTROP AND LEE COUNTIES...
AT 916 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA.
MODERATE TO HEAVY RAINS WERE NOTED BETWEEN NIXON...LULING...WAEDLER
AND GONZALES WITH LIGHT RAIN ELSEWHERE. RAINFALL RATES OF 1 TO 2
INCHES PER HOUR WERE ESTIMATED.
LOCATIONS IN THE WARNING AREA INCLUDE TANGLEWOOD...SMITHVILLE...
ROSANKY...PAIGE...LEXINGTON...GIDDINGS...FEDOR...DIME BOX...CIRCLE
D-KC ESTATES...CAMP SWIFT AND BASTROP.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM CDT
SATURDAY MORNING FOR SOUTH CENTRAL TEXAS.
&&
LAT...LON 3009 9694 2964 9713 2918 9788 2931 9792
2970 9777 2991 9751 3039 9728 3057 9697
3033 9675 3031 9665
$$000
WGUS74 KEWX 181543
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1043 AM CDT SAT APR 18 2009
TXC021-055-149-177-187-287-493-181551-
/O.EXP.KEWX.FF.W.0002.000000T0000Z-090418T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEE TX-BASTROP TX-FAYETTE TX-CALDWELL TX-GUADALUPE TX-GONZALES TX-
WILSON TX-
1043 AM CDT SAT APR 18 2009
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1045 AM CDT FOR
NORTHEASTERN WILSON...GONZALES...SOUTHEASTERN GUADALUPE...
SOUTHEASTERN CALDWELL...WESTERN FAYETTE...BASTROP AND LEE COUNTIES...
AT 1040 AM CDT...WIDELY SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
PERSISTED ACROSS THE AREA. RAINFALL RATES WERE LESS THAN ONE INCH
PER HOUR. THE THREAT FOR FLASH FLOODING HAS ENDED. THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER...SOME STREAMS MAY
CONTINUE TO RUN HIGH AND PONDING OF WATER IN LOW LYING AREAS MAY
PERSIST FOR THE NEXT HOUR OR SO.
LAT...LON 3009 9694 2964 9713 2918 9788 2931 9792
2970 9777 2991 9751 3039 9728 3057 9697
3033 9675 3031 9665
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 9:20 PM CDT | Flash Flood Watch | EWX | Atascosa, Bastrop, Bexar, Caldwell, Comal, DeWitt and 10 more | 19 hr |
| Apr 18, 3:03 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 27 min |
| Apr 18, 3:45 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde, Zavala | 60 min |
| Apr 18, 4:57 AM CDT | Areal Flood Advisory | EWX | Frio, Medina, Uvalde, Zavala | 2 hr |
| Apr 18, 5:11 AM CDT | Areal Flood Advisory | EWX | Atascosa, Caldwell, Gonzales, Guadalupe, Wilson | 2 hr |
| Apr 18, 5:46 AM CDT | Areal Flood Advisory | EWX | Bexar | 119 min |
| Apr 18, 5:49 AM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 56 min |
| Apr 18, 7:47 AM CDT | Flash Flood Warning | EWX | DeWitt, Fayette, Gonzales, Karnes, Lavaca, Lee and 1 more | 4 hr |
| Apr 18, 8:44 AM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Lavaca | 29 min |
| Apr 18, 10:50 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bastrop, Caldwell, Fayette, Gonzales, Guadalupe and 1 more | 115 min |
| Apr 18, 11:45 AM CDT | Flash Flood Warning | EWX | DeWitt, Gonzales, Lavaca | 3 hr |
| Apr 18, 12:01 PM CDT | River Flood Warning | EWX | Caldwell, Gonzales | 24 hr |
| Apr 18, 4:13 PM CDT | River Flood Warning | EWX | DeWitt | 60 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.