Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 79, NWS San Angelo, TX

October 24, 2002Kimble County, Sutton County, Texas

NWS San Angelo, TX issued this flash flood warning at Oct 24, 2002, 3:48 AM CDT for Kimble County, Sutton County, Texas. It was in force for 5 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: Oct 24, 2002, 3:48 AM CDT (08:48 UTC)
Expired: Oct 24, 2002, 8:45 AM CDT
In force: 5 hr
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

Counties Kimble County, TX, Sutton 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

Del Rio, TX (KDRT), launched 00:00Z, 8.8 hours before the alert went out and 139 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: 601 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 769 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 240848
FFWSJT
TXC267-435-241345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
348 AM CDT THU OCT 24 2002

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KIMBLE COUNTY IN SOUTH CENTRAL TEXAS
  SUTTON COUNTY IN SOUTHWEST TEXAS

* UNTIL 845 AM CDT

* AT 345 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED 
  THUNDERSTORMS WITH VERY HEAVY RAIN FROM 15 MILES SOUTHWEST OF 
  SONORA TO 5 MILES SOUTH OF JUNCTION...MOVING NORTHEAST AT 25 MPH.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE NEAR...
   SONORA AT 405 AM CDT
   SEGOVIA...ROOSEVELT AT 415 AM CDT
   JUNCTION AT 420 AM CDT
   LONDON AT 500 AM CDT

* RAINFALL UP TO 1 AND A HALF INCH EXPECTED THROUGH 645 AM CDT

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER DEPTH
MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT ATTEMPT TO
DRIVE AROUND BARRICADES. MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3036 10093 3031 9934 3047 9951 3068 9951
          3067 10084

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 Oct 24, 3:45 AM CDT, 3 minutes earlier.

Area forecast discussion, Oct 24, 3:45 AM CDT, 3 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
345 AM CDT THU OCT 24 2002

CURRENT...WSR-88D AND SATELLITE DATA INDICATES SHOWERS AND
THUNDERSTORMS CONTINUE TO DEVELOP WEST AND SOUTHWEST OF OUR CWFA.
SURFACE DEWPOINTS RANGE FROM 50 ACROSS THE BIG COUNTRY...TO THE MID
50S ACROSS THE CONCHO VALLEY...AND AROUND 60 THROUGHOUT OUR SOUTHERN
ZONES. IN ADDITION...SURFACE ANALYSIS PLACES FRONT ACROSS OUR
SOUTHERN ZONES IN AN EAST TO WEST LINE.

DAYS 1-3...MODEL DATA INDICATES THE MAIN SHOWER AND THUNDERSTORM
ACTIVITY WILL DEVELOP OR MOVE ACROSS WEST CENTRAL TEXAS TODAY.
ISENTROPIC ANALYSIS OF THE 300K AND 310K THETA E SURFACES SHOWS MAIN
UPGLIDE WILL DEVELOP AROUND NOON TODAY. ALSO...BEST THETA E RIDGE ON
THE 700 MB SURFACE DEVELOPS AROUND NOON. BEST SURFACE AND 925 MB
MOISTURE CONVERGENCE DEVELOPS ALONG THE SURFACE FRONT TODAY. AS FOR
POPS...WILL GO CLOSE TO GUIDANCE TODAY WITH A DOWNWARD TREND FOR
TONIGHT AND FRIDAY. BASED ON LATEST COORDINATION CALL WITH
SPC...WILL INCLUDE CROCKETT COUNTY IN A SEVERE THUNDERSTORM WATCH
FOR TODAY. AS FOR HIGHS TODAY...APPEARS ETA AND AVN MOS TOO HIGH.
LATEST RUC SUGGESTS TEMPERATURES ACROSS WEST CENTRAL TEXAS WILL
CHANGE LITTLE IF ANY TODAY. FOR TONIGHT AND BEYOND...NUMBERS CLOSE
TO GUIDANCE LOOK GOOD.

DAYS 4-7...NO CHANGES HERE.

CCF PRELIMS...

ABI 050/048/060/048 8311
SJT 057/053/063/050 8322
JCT 065/058/065/053 8433

.SJT...SEVERE THUNDERSTORM WATCH CROCKETT COUNTY TODAY.

23/HUBER

Hazardous weather outlook, Oct 23, 2:30 PM CDT, 13 hours 18 minutes before

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140-
154-155-168>170-232330-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
230 PM CDT WED OCT 23 2002

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL TEXAS.

.DAY ONE...

THUNDERSTORMS WILL DEVELOP TONIGHT ACROSS WEST CENTRAL TEXAS AS AN
UPPER LEVEL DISTURBANCE INTERACTS WITH A COLD FRONT. SOME OF THESE
THUNDERSTORMS WILL PRODUCE HEAVY RAIN WHICH COULD CAUSE FLASH
FLOODING. A FEW OF THE STORMS COULD REACH SEVERE LEVELS...WITH THE
MAIN THREAT BEING LARGE HAIL. THE HEAVY RAIN AND HAIL THREAT WILL
MAINLY BE SOUTH OF A STERLING CITY...BALLINGER...BROWNWOOD LINE.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

.DAYS TWO THROUGH SEVEN...

HEAVY RAIN WILL AGAIN BE A THREAT ACROSS WEST CENTRAL TEXAS LATE
SATURDAY.

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 4:43 AM CDT	Flash Flood Warning	SJT	Mason	5 hr
Oct 24, 7:08 AM CDT	Flash Flood Warning	SJT	Crockett	5 hr
Oct 24, 9:55 AM CDT	Flash Flood Warning	SJT	Kimble, Sutton	3 hr
Oct 24, 1:16 PM CDT	Flash Flood Warning	SJT	Kimble, Sutton	6 hr

Nearby

Flash Flood Warnings in Texas, 2002 Every flash flood warning in 2002

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.