Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 95, NWS Austin/San Antonio, TX

April 30, 2007Bexar County, Kendall County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 30, 2007, 11:36 AM CDT for Bexar County, Kendall County, Texas. It was in force for 99 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 30, 2007, 11:36 AM CDT (16:36 UTC)
Expired: Apr 30, 2007, 1:15 PM CDT
In force: 99 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Bexar County, TX, Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 57 km from the middle of the area, began a volume at 16:36 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

Del Rio, TX (KDRT), launched 12:00Z, 4.6 hours before the alert went out and 218 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 177 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KEWX 301638
FFWEWX
TXC029-259-301815-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1136 AM CDT MON APR 30 2007

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  BEXAR COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...UNIVERSAL CITY...SAN ANTONIO...
  KENDALL COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITY OF BOERNE...

* UNTIL 115 PM CDT

* AT 1136 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
  RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING
  FROM CONTINUED THUNDERSTORM ACTIVITY AND RUNOFF OVER THE SAN 
  ANTONIO AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WARING...
  THE DOMINION...SISTERDALE AND LEON SPRINGS

CONTINUED 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 2928 9879 2916 9845 2943 9818 2962 9839
      2974 9868 3012 9858 3012 9886 2971 9876

$$

1 follow-up statement

000 
WGUS74 KEWX 301740
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1237 PM CDT MON APR 30 2007

TXC029-259-301815-
KENDALL TX-BEXAR TX-
1237 PM CDT MON APR 30 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR BEXAR
AND KENDALL COUNTIES...

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER BEXAR AND 
KENDALL COUNTIES THROUGH THE EARLY AFTERNOON. THIS ADDITIONAL 
RAINFALL WILL BE QUICK TO RUNOFF...AND CONTINUE TO CAUSE FLASH 
FLOODING PROBLEMS ESPECIALLY OVER LOW LYING AND FLOOD PRONE AREAS.  
THE IMMEDIATE THREAT OF HEAVY RAIN HAS DIMINISHED FOR THE NEXT FEW 
HOURS...HOWEVER...THE THREAT FOR FLASH FLOODING WILL CONTINUE 
THROUGHOUT THE AFTERNOON AND EVENING AS MORE STORMS ARE EXPECTED TO 
DEVELOP LATER TODAY. 

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.

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 2928 9879 2916 9845 2943 9818 2962 9839
      2974 9868 3012 9858 3012 9886 2971 9876

$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 10:02 PM CDT	Tornado Warning	EWX	Maverick	58 min
Apr 29, 10:42 PM CDT	Tornado Warning	EWX	Maverick	33 min
Apr 29, 11:14 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	21 min
Apr 29, 11:43 PM CDT	Flash Flood Warning	EWX	Val Verde	4 hr
Apr 30, 1:55 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	65 min
Apr 30, 2:11 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	64 min
Apr 30, 2:40 AM CDT	Flash Flood Warning	EWX	Edwards	4 hr
Apr 30, 2:59 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	61 min
Apr 30, 3:40 AM CDT	Flash Flood Warning	EWX	Val Verde	4 hr
Apr 30, 4:16 AM CDT	Flash Flood Warning	EWX	Kinney	3 hr
Apr 30, 6:44 AM CDT	Flash Flood Warning	EWX	Edwards	4 hr
Apr 30, 7:12 AM CDT	Flash Flood Warning	EWX	Kinney, Real, Uvalde	3 hr
Apr 30, 7:43 AM CDT	Flash Flood Warning	EWX	Val Verde	2 hr
Apr 30, 8:19 AM CDT	Flash Flood Warning	EWX	Bandera	3 hr
Apr 30, 8:59 AM CDT	Flash Flood Warning	EWX	Medina	2 hr
Apr 30, 9:34 AM CDT	Flash Flood Warning	EWX	Kerr	56 min
Apr 30, 9:45 AM CDT	Flash Flood Warning	EWX	Bexar, Kendall	2 hr
Apr 30, 10:27 AM CDT	Flash Flood Warning	EWX	Comal	2 hr
Apr 30, 11:10 AM CDT	Severe Thunderstorm Warning	EWX	Bexar	50 min
Apr 30, 11:24 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	66 min
Apr 30, 11:31 AM CDT	Flash Flood Warning	EWX	Guadalupe	3 hr
Apr 30, 11:44 AM CDT	Severe Thunderstorm Warning	EWX	Wilson	61 min
Apr 30, 12:23 PM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	37 min
Apr 30, 12:27 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	63 min
Apr 30, 12:31 PM CDT	Flash Flood Warning	EWX	Gonzales	119 min
Apr 30, 12:42 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	63 min
Apr 30, 12:45 PM CDT	Flash Flood Warning	EWX	Wilson	2 hr
Apr 30, 12:48 PM CDT	Flash Flood Warning	EWX	Caldwell	117 min
Apr 30, 1:14 PM CDT	Flash Flood Warning	EWX	Fayette, Lavaca	30 days
Apr 30, 1:14 PM CDT	Flash Flood Warning	EWX	Fayette, Lavaca	2 hr
Apr 30, 1:20 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	25 min
Apr 30, 1:23 PM CDT	Flash Flood Warning	EWX	Bandera	67 min
Apr 30, 1:24 PM CDT	Severe Thunderstorm Warning	EWX	Lavaca	66 min
Apr 30, 1:26 PM CDT	Severe Thunderstorm Warning	EWX	Fayette	79 min
Apr 30, 1:32 PM CDT	Flash Flood Warning	EWX	Karnes	118 min
Apr 30, 1:36 PM CDT	Flash Flood Warning	EWX	Kerr	114 min
Apr 30, 1:45 PM CDT	Flash Flood Warning	EWX	Atascosa	2 hr
Apr 30, 1:55 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	18 min
Apr 30, 2:06 PM CDT	Severe Thunderstorm Warning	EWX	Karnes	54 min
Apr 30, 2:07 PM CDT	Flash Flood Warning	EWX	Kendall	53 min
Apr 30, 2:22 PM CDT	Flash Flood Warning	EWX	Gonzales	113 min
Apr 30, 2:28 PM CDT	Flash Flood Warning	EWX	Wilson	77 min
Apr 30, 2:38 PM CDT	Severe Thunderstorm Warning	EWX	Kendall	67 min
Apr 30, 2:43 PM CDT	Flash Flood Warning	EWX	Kendall	62 min
Apr 30, 2:55 PM CDT	Flash Flood Warning	EWX	DeWitt	2 hr
Apr 30, 3:00 PM CDT	Flash Flood Warning	EWX	Fayette, Lavaca	2 hr
Apr 30, 3:12 PM CDT	Flash Flood Warning	EWX	Karnes	2 hr
Apr 30, 3:19 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	56 min
Apr 30, 3:37 PM CDT	Flash Flood Warning	EWX	Wilson	113 min
Apr 30, 4:59 PM CDT	Flash Flood Warning	EWX	DeWitt, Lavaca	3 hr
Apr 30, 5:31 PM CDT	Flash Flood Warning	EWX	Karnes	2 hr
Apr 30, 6:30 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt	45 min
Apr 30, 6:58 PM CDT	Severe Thunderstorm Warning	EWX	Lavaca	47 min

Nearby

Flash Flood Warnings in Texas, 2007 Every 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.