Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 68, NWS San Angelo, TX

September 11, 2003Shackelford County, Texas

NWS San Angelo, TX issued this flash flood warning at Sep 11, 2003, 12:45 PM CDT for Shackelford 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 outline as issued.

The facts

Issued
Sep 11, 2003, 12:45 PM CDT (17:45 UTC)
Expired
Sep 11, 2003, 3:45 PM CDT
In force
3 hr
Issued by
NWS San Angelo, TX
Area
Counties, with a storm outline in the text

County Shackelford County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 5.8 hours before the alert went out and 199 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, Fort Worth, TX at 12:00Z on 2003-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1288 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, Fort Worth, TX at 12:00Z on 2003-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.193958Sfc1 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
1288 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 111746
FFWSJT
TXC417-112045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
1245 PM CDT THU SEP 11 2003

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SHACKELFORD COUNTY IN WEST CENTRAL TEXAS

* UNTIL 345 PM CDT

* AT 1245 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED           
  THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS SOUTHERN SHACKELFORD     
  COUNTY FROM STATE HIGHWAY 351...EASTWARD TO MORAN. THE HEAVY       
  RAIN WAS MOVING NORTHEAST AT 20 MPH.

* RAINFALL TOTALING ONE TO TWO INCHES HAS FALLEN IN THE WARNED       
  AREA...WITH ADDITIONAL RAINFALL UP TO TWO INCHES EXPECTED THROUGH  
  230 PM CDT

TURN AROUND DONT DROWN DO NOT DRIVE INTO AREAS WHERE WATER COVERS
THE ROAD. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW SAFE PASSAGE.
REMEMBER...MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

LAT...LON 3266 9958 3255 9958 3257 9914 3271 9912

$$

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 Sep 11, 11:25 AM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, Sep 11, 11:25 AM CDT, 1 hour 20 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
1125 AM CDT THU SEP 11 2003

COLD FRONT CURRENTLY FROM EAST OF CHILDRESS TO NEAR MIDLAND.
THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOP ON SOUTHWEST SIDE
OF MCS THIS AFTERNOON FROM ABILENE TO SWEETWATER...AND ACROSS
WESTERN CONCHO VALLEY...AS SURFACE HEATING OCCURS AND CONVERGENCE
SHARPENS. WE ARE CONSIDERING A FLOOD WATCH FOR TONIGHT ACROSS
SOUTHEAST COUNTIES. ZONES TO BE UPDATED SHORTLY...ADJUSTING POPS AND
TEMPERATURES.

.SJT...NONE.

14
Hazardous weather outlook, Sep 11, 5:40 AM CDT, 7 hours 5 minutes before
TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140-
154-155-168>170-121000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
540 AM CDT THU SEP 11 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL TEXAS.

.DAY ONE...
A SLOW MOVING COLD FRONT WILL MOVE INTO THE THE BIG COUNTRY AND
CONCHO VALLEY THIS AFTERNOON...AND INTO THE NORTHWEST HILL COUNTRY
OVERNIGHT. WITH A MOIST AND UNSTABLE ATMOSPHERE IN PLACE AHEAD OF
THE FRONT...SEVERE THUNDERSTORMS ARE POSSIBLE. THERE IS A SLIGHT
RISK OF SEVERE THUNDERSTORMS IN THE AFTERNOON AND EARLY EVENING...
MAINLY ALONG AND NORTH OF AN OZONA...SONORA...EDEN...COLEMAN LINE.
ABILENE AND SAN ANGELO ARE IN THE SLIGHT RISK AREA. THE MAIN THREAT
WILL BE LARGE HAIL AND DAMAGING DOWNBURST WINDS OF 60 MPH OR MORE.
LOCALLY HEAVY RAINFALL OF 1 TO 4 INCHES WILL ALSO BE POSSIBLE ALONG
THE FRONT. THERE IS THE POTENTIAL FOR FLOODING OF LOW LYING AREAS
AND LOW WATER CROSSINGS.

.DAYS TWO THROUGH SEVEN...
THE POTENTIAL FOR LOCALLY HEAVY RAINS WILL CONTINUE FRIDAY MORNING
NEAR THE COLD FRONT...FROM JUNCTION TO MASON TO SAN SABA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

04

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 9:15 PM CDTSevere Thunderstorm WarningSJTFisher60 min
Sep 10, 10:19 PM CDTSevere Thunderstorm WarningSJTFisher26 min
Sep 11, 5:00 PM CDTFlash Flood WarningSJTMason6 hr
Sep 11, 5:12 PM CDTFlash Flood WarningSJTMcCulloch3 hr
Sep 11, 6:30 PM CDTFlash Flood WarningSJTMenard5 hr

Nearby

Flash Flood Warnings in Texas, 2003Every flash flood warning in 2003

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.