Alert archive / Texas / Flash Flood Warnings in 2007
Flash Flood Warning 375, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 23, 2007, 6:27 PM CDT for Comal County, Guadalupe 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 counties it named.
The facts
- Issued
- Jul 23, 2007, 6:27 PM CDT (23:27 UTC)
- Expired
- Jul 23, 2007, 9:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Comal County, TX, Guadalupe County, TX
The radar
The Austin/San Antonio radar (KEWX), 8 km from the middle of the area, began a volume at 23:29 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
Corpus Christi, TX (KCRP), launched 12:00Z, 11.5 hours before the alert went out and 231 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
- 860 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 232328
FFWEWX
TXC091-187-240230-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
627 PM CDT MON JUL 23 2007
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
COMAL COUNTY IN SOUTH CENTRAL TEXAS...
THIS INCLUDES THE CITIES OF...NEW BRAUNFELS...CANYON LAKE DAM...
GUADALUPE COUNTY IN SOUTH CENTRAL TEXAS...
THIS INCLUDES THE CITY OF SEGUIN...
* UNTIL 930 PM CDT
* AT 624 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM
A THUNDERSTORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZORN AND
SMITHSON VALLEY
VERY HEAVY RAINFALL OF ONE TO TWO INCHES PER HOUR WILL CONTINUE AND
CAUSE RAPID RUNOFF LEADING TO FLASH FLOODING.
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE THROUGH FLOODED
AREAS...ESPECIALLY AT NIGHT. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL NEWS MEDIA FOR THE LATEST FLOOD INFORMATION.
LAT...LON 2961 9765 2992 9826 2982 9839 2961 9823
2941 9792
$$2 follow-up statements
000
WGUS74 KEWX 240149
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
848 PM CDT MON JUL 23 2007
TXC091-187-240230-
COMAL TX-GUADALUPE TX-
848 PM CDT MON JUL 23 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
GUADALUPE AND COMAL COUNTIES...
AT 847 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECT
PATCHY LIGHT TO MODERATE RAINS ACROSS COMAL AND GUADALUPE COUNTIES.
RAINFALL RATES OF LESS THAN ONE QUARTER INCH WERE NOTED. SOME
FLOODING CAN STILL BE EXPECTED DUE TO EARLIER HEAVY RAINS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZORN...
SMITHSON VALLEY...NEW BRAUNFELS AND CANYON LAKE DAM
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
LAT...LON 2961 9765 2992 9826 2982 9839 2961 9823
2941 9792
$$000
WGUS74 KEWX 240225
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
923 PM CDT MON JUL 23 2007
TXC091-187-240233-
COMAL TX-GUADALUPE TX-
923 PM CDT MON JUL 23 2007
...THE FLASH FLOOD WARNING WILL EXPIRE AT 930 PM CDT FOR GUADALUPE
AND COMAL COUNTIES...
AT 920 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
PATCHY LIGHT RAINS ACROSS MAINLY GUADALUPE COUNTY. THE THREAT FOR
FLASH FLOODING HAS ENDED. AS A RESULT...THE FLASH FLOOD WARNING WILL
BE ALLOWED TO EXPIRE. SOME MINOR RISES ON SMALL STREAMS IS STILL
POSSIBLE DUE TO EARLIER HEAVY RAINS.
LAT...LON 2961 9765 2992 9826 2982 9839 2961 9823
2941 9792
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 4:56 PM CDT | Flash Flood Warning | EWX | Bexar | 2 hr |
| Jul 23, 5:25 PM CDT | Flash Flood Warning | EWX | Burnet, Travis, Williamson | 3 hr |
| Jul 23, 5:42 PM CDT | Flash Flood Warning | EWX | Hays | 3 hr |
| Jul 23, 6:33 PM CDT | Flash Flood Warning | EWX | Blanco, Kendall | 3 hr |
| Jul 23, 6:57 PM CDT | Severe Thunderstorm Warning | EWX | Comal, Guadalupe | 37 min |
| Jul 23, 6:59 PM CDT | Tornado Warning | EWX | Williamson | 35 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.