Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 138, NWS San Angelo, TX

August 18, 20074 counties in Texas

NWS San Angelo, TX issued this flash flood warning at Aug 18, 2007, 3:55 AM CDT for 4 counties in Texas. It took effect at Aug 18, 2007, 4:02 AM CDT. It was in force for 6 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
Aug 18, 2007, 3:55 AM CDT (08:55 UTC)
In effect from
Aug 18, 2007, 4:02 AM CDT
Expired
Aug 18, 2007, 10:00 AM CDT
In force
6 hr
Issued by
NWS San Angelo, TX
Area
Whole counties

Counties Callahan County, TX, Jones County, TX, Shackelford County, TX, Taylor County, TX

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 8.9 hours before the alert went out and 250 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, Midland Regional, TX at 00:00Z on 2007-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2007-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -64 square meters per square second.1939Sfc1 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
83 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
602 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-64 m²/s²
0-3 km storm-relative helicity
-16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 18, 2:03 AM CDT, 1 hour 52 minutes earlier.

Area forecast discussion, Aug 18, 2:03 AM CDT, 1 hour 52 minutes before
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Hazardous weather outlook, Aug 17, 2:12 PM CDT, 13 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
212 PM CDT FRI AUG 17 2007

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-181915-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
212 PM CDT FRI AUG 17 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

LOOK FOR THE POTENTIAL FOR HEAVY RAINFALL AND ASSOCIATED FLASH
FLOODING TO CONTINUE ACROSS MOST OF WEST CENTRAL TEXAS. RAINFALL
AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE. HOWEVER...SOME LOCATIONS
MAY RECEIVE AN ADDITIONAL 3 TO 6 INCHES...ESPECIALLY WEST OF A
LINE FROM JUNCTION...TO EDEN...TO ABILENE...TO HASKELL. IN
ADDITION TO FLASH FLOODING...CREEKS AND DRAWS MAY RISE ABOVE THEIR
ABILITY TO CONTAIN ADDITION RUNOFF.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

AS WHAT REMAINS OF TROPICAL STORM ERIN CONTINUES TO MOVE SLOWLY
NORTHWEST...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS WEST
CENTRAL TEXAS THROUGH THE WEEKEND. FLASH FLOODING WILL CONTINUE TO
BE THE MAIN THREAT...ESPECIALLY FOR THOSE AREAS OF WEST CENTRAL
TEXAS NORTHWEST OF A LINE FROM SONORA TO BROWNWOOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED. HOWEVER...WE ENCOURAGE ALL
SPOTTERS AND RAINFALL OBSERVERS TO REPORT FLOODING OR HEAVY
RAINFALL.

23/HUBER

In the hours before

Special weather statement, Aug 18, 2:03 AM CDT, 1 hour 52 minutes before
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Special weather statement, Aug 18, 2:17 AM CDT, 1 hour 38 minutes before
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Local storm report, Aug 18, 2:52 AM CDT, 1 hour 3 minutes before
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The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 7:03 PM CDTFlash Flood WarningSJTJones, Taylor117 min
Aug 17, 8:41 PM CDTFlash Flood WarningSJTJones, Taylor2 hr
Aug 17, 9:00 PM CDTFlash Flood WarningSJTCoke, Runnels, Tom Green2 hr
Aug 17, 9:30 PM CDTFlash Flood WarningSJTSchleicher, Sutton3 hr
Aug 17, 10:14 PM CDTFlash Flood WarningSJTFisher, Haskell, Jones, Nolan, Taylor6 hr
Aug 17, 10:31 PM CDTFlash Flood WarningSJTCoke, Concho, Runnels, Tom Green6 hr
Aug 17, 11:31 PM CDTFlash Flood WarningSJTCrockett4 hr
Aug 17, 11:54 PM CDTFlash Flood WarningSJTSchleicher, Sutton5 hr
Aug 18, 2:44 AM CDTRiver Flood WarningSJTTom Green19 hr
Aug 18, 3:28 AM CDTFlash Flood WarningSJTCrockett4 hr
Aug 18, 3:55 AM CDTFlash Flood WarningSJTFisher, Nolan6 hr
Aug 18, 4:11 AM CDTFlash Flood WarningSJTHaskell, Throckmorton6 hr
Aug 18, 4:20 AM CDTFlash Flood WarningSJTCoke, Concho, Irion, Runnels, Tom Green6 hr
Aug 18, 4:30 AM CDTFlash Flood WarningSJTSchleicher, Sutton6 hr
Aug 18, 8:42 AM CDTRiver Flood WarningSJTShackelford, Throckmorton24 hr
Aug 18, 9:59 AM CDTFlash Flood WarningSJTFisher, Jones, Nolan, Taylor6 hr
Aug 18, 10:16 AM CDTFlash Flood WarningSJTHaskell4 hr
Aug 18, 11:11 AM CDTRiver Flood WarningSJTRunnels38 hr
Aug 18, 2:16 PM CDTFlash Flood WarningSJTHaskell4 hr
Aug 18, 3:59 PM CDTFlash Flood WarningSJTFisher, Jones, Nolan, Taylor4 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; the sounding from the Mesonet's radiosonde archive.