Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 33, NWS Austin/San Antonio, TX

May 10, 20125 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 10, 2012, 2:49 PM CDT for 5 counties in Texas. It was in force for 3 hr. 4 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
May 10, 2012, 2:49 PM CDT (19:49 UTC)
Expired
May 10, 2012, 6:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

Counties Bandera County, TX, Edwards County, TX, Kerr County, TX, Real County, TX, Uvalde County, TX

The radar

The Laughlin AFB radar (KDFX), 96 km from the middle of the area, began a volume at 19:52 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

TimeReportWhereRemark
May 10, 4:16 PM CDTFLASH FLOODMontell, TXEMERGENCY MANAGER REPORTS FLOODED WATER CROSSINGS ON ROADS THROUGHOUT UVALDE COUNTY. HWY 55 CLOSED FROM NORTH OF UVALDE TO CAMP WOOD...FM 1051 CLOSED...FM 334 FROM BRACKETTVILLE TO INTERSECTION WITH SH 55...HWY 187 CLOSED FROM SABINAL TO UTOPIA
May 10, 5:15 PM CDTFLASH FLOOD2 E Vanderpool, TXEMERGENCY MANAGEMENT REPORTED ROCK SLIDE DUE TO FLASH FLOODING 2 E OF VANDERPOOL
May 10, 5:45 PM CDTFLASH FLOODLeakey, TXTXDOT REPORTS RM 336 FROM LEAKEY NORTHWARD TO SH 41 IS CLOSED DUE TO FLOODED LOW WATER CROSSINGS
May 10, 5:48 PM CDTFLASH FLOODVanderpool, TXTXDOT REPORTS WATER OVER ROAD AT VARIOUS LOW WATER CROSSINGS ON HWY 187 FROM VANDERPOOL TO LOST MAPLES STATE PARK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 7.8 hours before the alert went out and 130 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-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 2012-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1149 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2012-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1149 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
1.7
Supercell composite
7.4

Open this sounding in Storm Lab

The text

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

570 
WGUS54 KEWX 101949
FFWEWX
TXC019-137-265-385-463-102300-
/O.NEW.KEWX.FF.W.0033.120510T1949Z-120510T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
249 PM CDT THU MAY 10 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN BANDERA COUNTY...
  EASTERN EDWARDS COUNTY...
  WESTERN KERR COUNTY...
  REAL COUNTY...
  NORTHERN UVALDE COUNTY...

* UNTIL 600 PM CDT.

* AT 246 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED VERY HEAVY RAINS SETTING UP ACROSS PORTIONS OF THE 
  HILL COUNTRY IN AN AREA GENERALLY BOUNDED BY LINE FROM MOUNTAIN
  HOME TO UTOPIA TO CAMP WOOD TO 10 MILES NORTH OF ROCKSPRINGS.
  RAINS WILL MOVE OVER THE SAME AREAS FOR THE NEXT COUPLE OF
  HOURS. RAINFALL RATES OF 1 TO 3 INCHES PER HOUR HAVE BEEN 
  ESTIMATED AND WILL CONTINUE TO OCCUR. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LEAKEY...VANDERPOOL...BARKSDALE...CAMP WOOD...CONCAN...GARNER STATE
  PARK...KERR WILDLIFE MANAGEMENT AREA...LOST MAPLES STATE PARK...
  MONTELL...MOUNTAIN HOME...REAGAN WELLS...RIO FRIO...TUFF...UTOPIA
  AND VANCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

&&

LAT...LON 3029 9931 2962 9944 2949 9942 2948 10007
      3029 10025 3030 9998

$$
1 follow-up statement
449 
WGUS74 KEWX 102143
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
443 PM CDT THU MAY 10 2012

TXC019-137-265-385-463-102300-
/O.CON.KEWX.FF.W.0033.000000T0000Z-120510T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EDWARDS TX-KERR TX-REAL TX-UVALDE TX-BANDERA TX-
443 PM CDT THU MAY 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
WESTERN BANDERA...NORTHERN UVALDE...REAL...WESTERN KERR AND EASTERN
EDWARDS COUNTIES...

AT 440 PM CDT...A BAND OF THUNDERSTORMS CONTINUED MOVING NORTHEAST AROUND
30 MPH FROM NORTHEAST UVALDE COUNTY JUST EAST OF CONCAN TO JUST EAST OF
KERRVILLE.

SEVERAL HIGHWAYS IN UVALDE AND REAL COUNTIES HAVE BEEN EITHER CLOSED 
OR INUNDATED DUE TO FLOODING. AMONG THEM...HIGHWAY 55 IN THE CAMP 
WOOD AREA REPORTED A FOOT AND A HALF OF WATER OVER THE ROADWAY... 
HIGHWAY 334 EAST OF BRACKETVILLE AND HIGHWAY 187 IN THE UTOPIA AREA 
ARE BOTH CLOSED DUE TO HIGH WATER. 

SMALL STREAMS AND CREEKS WILL FLOOD THE NEXT FEW HOURS...FLOODING 
SECONDARY ROADS...LOW BRIDGES AND CROSSINGS. MOTORISTS SHOULD USE 
GREAT CARE APPROACHING FLOOD PRONE AREAS AND IN NO CIRCUMSTANCES 
ENTER FLOODED CROSSINGS. 

LOCATIONS IN THE WARNING AREA INCLUDE MOUNTAIN HOME AND KERR WILDLIFE
MANAGEMENT AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3029 9931 2962 9944 2949 9942 2948 10007
      3029 10025 3030 9998

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 5:21 AM CDTSevere Thunderstorm WarningEWXVal Verde54 min
May 10, 6:12 AM CDTSevere Thunderstorm WarningEWXVal Verde63 min
May 10, 7:19 AM CDTSevere Thunderstorm WarningEWXEdwards, Val Verde44 min
May 10, 9:29 AM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Zavala61 min
May 10, 10:30 AM CDTSevere Thunderstorm WarningEWXFrio60 min
May 10, 10:33 AM CDTAreal Flood AdvisoryEWXFrio117 min
May 10, 11:17 AM CDTSevere Thunderstorm WarningEWXAtascosa, Frio58 min
May 10, 11:32 AM CDTSevere Thunderstorm WarningEWXAtascosa, Wilson58 min
May 10, 12:02 PM CDTFlash Flood WarningEWXVal Verde3 hr
May 10, 12:14 PM CDTSevere Thunderstorm WarningEWXAtascosa, Frio31 min
May 10, 12:20 PM CDTAreal Flood AdvisoryEWXAtascosa, Frio2 hr
May 10, 12:40 PM CDTAreal Flood AdvisoryEWXBandera, Edwards, Kerr, Kinney, Real, Uvalde110 min
May 10, 1:04 PM CDTSevere Thunderstorm WarningEWXKarnes, Wilson56 min
May 10, 1:15 PM CDTTornado WarningEWXGonzales, Karnes, Wilson45 min
May 10, 1:42 PM CDTTornado WarningEWXAtascosa33 min
May 10, 1:57 PM CDTTornado WarningEWXDeWitt, Gonzales, Karnes, Wilson33 min
May 10, 2:19 PM CDTFlash Flood WarningEWXAtascosa, DeWitt, Gonzales, Karnes, Wilson3 hr
May 10, 2:24 PM CDTSevere Thunderstorm WarningEWXKarnes51 min
May 10, 2:42 PM CDTTornado WarningEWXKarnes48 min
May 10, 3:05 PM CDTTornado WarningEWXWilson40 min
May 10, 3:31 PM CDTTornado WarningEWXKarnes29 min
May 10, 3:40 PM CDTRiver Flood WarningEWXVal Verde31 hr
May 10, 3:45 PM CDTAreal Flood AdvisoryEWXDeWitt, Fayette, Gonzales, Lavaca105 min
May 10, 3:57 PM CDTTornado WarningEWXDeWitt, Karnes, Wilson33 min
May 10, 4:39 PM CDTFlash Flood WarningEWXBandera, Gillespie, Kerr81 min
May 10, 4:52 PM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales, Karnes29 min
May 10, 5:58 PM CDTFlash Flood WarningEWXBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 4 more3 hr
May 10, 5:58 PM CDTSevere Thunderstorm WarningEWXDimmit, Maverick, Uvalde, Zavala47 min
May 10, 6:11 PM CDTAreal Flood AdvisoryEWXDeWitt, Fayette, Karnes, Lavaca109 min
May 10, 6:41 PM CDTSevere Thunderstorm WarningEWXDimmit, Frio, Zavala49 min

Nearby

Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012

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.