Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 26, NWS San Angelo, TX

July 3, 2002Brown County, Coleman County, Texas

NWS San Angelo, TX issued this flash flood warning at Jul 3, 2002, 2:45 AM CDT for Brown County, Coleman 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: Jul 3, 2002, 2:45 AM CDT (07:45 UTC)
Expired: Jul 3, 2002, 5:45 AM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

Counties Brown County, TX, Coleman 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 00:00Z, 7.8 hours before the alert went out and 209 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: 20 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1081 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 43 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 030745
FFWSJT
TXC049-083-031045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
242 AM CDT WED JUL 3 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COLEMAN COUNTY IN NORTH CENTRAL TEXAS
  BROWN COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 545 AM CDT

* AT 242 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF 
VERY HEAVY RAIN IN NORTHEASTERN COLEMAN COUNTY AND NORTHWESTERN 
BROWN COUNTY.  THE AREA OF HEAVY RAIN WAS NEARLY STATIONARY.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 3179 9941 3179 9880 3196 9905 3205 9939

1 follow-up statement

000 
WGUS74 KSJT 030922
FFSSJT
TXC049-083-031045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
418 AM CDT WED JUL 3 2002

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR COLEMAN COUNTY AND 
BROWN COUNTY UNTIL 545 AM CDT...

AT 412 AM CDT...DOPPLER RADAR ESTIMATED THAT 3 TO 4 INCHES OF RAIN 
HAVE FALLEN OVER PORTIONS OF NORTHERN BROWN AND COLEMAN COUNTIES 
SINCE 200 AM...WITH ADDITIONAL RAINFALL UP TO 1 INCH EXPECTED BY 545 
AM CDT. THIS WILL CONTINUE TO PRODUCE FLOODING OF LOW WATER 
CROSSINGS AND POOR DRAINAGE AREAS.

SMALL STREAMS...DRAWS AND ARROYOS THAT ARE NORMALLY DRY ARE LIKELY 
TO CONTAIN RAPIDLY FLOWING WATER. DO NOT DRIVE ACROSS AREAS WHERE 
WATER OF UNKNOWN DEPTH COVERS THE ROAD.

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.

MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.

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 Jul 2, 2:33 PM CDT, 12 hours 12 minutes earlier.

Area forecast discussion, Jul 2, 2:33 PM CDT, 12 hours 12 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION...CORRECTED HEADLINE
NATIONAL WEATHER SERVICE SAN ANGELO TX
233 PM CDT TUE JUL 2 2002

TROPICAL AIRMASS THUNDERSTORMS CONTINUE OVER SC TX THIS AFTERNOON...
SLIGHTLY WEST YESTERDAY/S POSITION. SCATTERED CONVECTION HAD WORKED
ITS WAY INTO THE CONCHO VALLEY THIS...BUT FOR THE MOST PART...RAIN
CONTINUED TO EAST OF AN UPPER LEVEL TROF AXIS EXTENDING FROM DEL RIO
TO WICHITA FALLS. GOES IR IMAGERY INDICATED WARMING CLOUD TOPS OVER
SC TX IN THE PAST 2 HOURS.

NCEP MODELS ARE CONSISTENT WITH EARLIER RUNS IN MOVING THE UPPER
TROF SLOWLY SOUTHWEST TONIGHT THROUGH THURSDAY...UNDER A BUILDING
UPPER RIDGE OVER THE CENTRAL HIGH PLAINS. STILL APPEARS THAT
WEDNESDAY HOLDS THE HIGHEST POTENTIAL FOR RAINFALL OVER WC TX. AS
WITH PREVIOUS FORECASTS...WILL UNDERCUT MODEL POPS SLIGHTLY OVER THE
BIG COUNTRY...DUE TO THE MODELS CONSISTENT WET BIAS OVER THE NORTH.
FOR THE SOUTHEAST ZONES...EXPECT FLASH FLOOD THREAT TO HOLD OFF
UNTIL AFTER MIDNIGHT. WILL EXTEND THE FLASH FLOOD WATCH INTO
WEDNESDAY... INCLUDING SUTTON COUNTY. 12Z DRT SOUNDING SHOWS PRECIP
WATER VALUE OF 1.7 INCHES...AND A NEARLY SATURATED LAYER UP THROUGH
650 MB.

LOW LEVEL MOISTURE REMAINS FOR THE FOURTH OF JULY HOLIDAY...WITH
SURFACE DEWPOINTS IN THE MID AND UPPER 60S. INVERTED UPPER LEVEL
TROF IS PROGGED FURTHER SOUTHWEST OF THE FORECAST AREA AND SHEARED
NORTHWEST THROUGH THE PERMIAN BASIN. MOSTLY CLOUDY SKIES A GOOD BET
FOR WC TX MOST OF THE DAY. DIFFERENTIAL SURFACE HEATING WILL LIKELY
AID SCATTERED THUNDERSTORM DEVELOPMENT...AS CONVECTIVE INHIBITION
REMAINS WEAK. WILL MAINTAIN CHANCE/SLIGHT CHANCE POPS FOR THE
HOLIDAY.

MID LEVEL TEMPS WARM FRIDAY...AS THE UPPER TROF IS SHEARED OUT UNDER
A BUILDING RIDGE. WEEKEND APPEARS DRY...WITH SEASONAL TEMPS.

ABI 069/084/069/089/071 3422
SJT 071/083/070/089/072 4533
JCT 071/081/070/089/072 5522

.SJT...FLASH FLOOD WATCH TONIGHT AND WEDNESDAY FOR MASON...MENARD...
MCCULLOCH... KIMBLE...SAN SABA AND SUTTON COUNTIES.

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 11:46 PM CDT	Flash Flood Warning	SJT	San Saba	6 hr
Jul 3, 3:14 AM CDT	Flash Flood Warning	SJT	Callahan	3 hr
Jul 3, 3:18 AM CDT	Flash Flood Warning	SJT	Runnels	3 hr
Jul 3, 5:38 AM CDT	Flash Flood Warning	SJT	Coleman	3 hr
Jul 3, 8:35 AM CDT	Flash Flood Warning	SJT	Coleman	3 hr
Jul 3, 8:44 AM CDT	Flash Flood Warning	SJT	Brown	4 hr
Jul 3, 9:32 AM CDT	Flash Flood Warning	SJT	Callahan	3 hr
Jul 3, 12:36 PM CDT	Flash Flood Warning	SJT	Brown	3 hr
Jul 3, 3:15 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	30 min
Jul 3, 3:28 PM CDT	Flash Flood Warning	SJT	Brown	4 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.