Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 17, NWS San Angelo, TX

May 25, 2002Runnels County, Texas

NWS San Angelo, TX issued this flash flood warning at May 25, 2002, 8:10 PM CDT for Runnels 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: May 25, 2002, 8:10 PM CDT (01:10 UTC)
Expired: May 25, 2002, 11:00 PM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Runnels 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

Midland Regional, TX (KMAF), launched 00:00Z, 1.2 hours before the alert went out and 205 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: 2604 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1222 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 260110
FFWSJT
TXC399-260400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
810 PM CDT SAT MAY 25 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  RUNNELS COUNTY IN SOUTHWEST TEXAS

* UNTIL 1100 PM CDT

* AT 810 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY       
  HEAVY RAIN 4 MILES NORTH OF BALLINGER...MOVING SOUTHEAST AT 10 MPH.
  THE STORMS EXTEND WESTWARD TO ROBERT LEE.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR...
   BALLINGER AT 810 PM CDT
   CREWS AT 825 PM CDT
   BENOIT AT 840 PM CDT

* RAINFALL TOTALING 1 TO 2 INCHES HAS FALLEN IN THE WARNED AREA      
  ...WITH ADDITIONAL RAINFALL UP TO 3 INCHES EXPECTED THROUGH 1100   
  PM 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.

LAT...LON 3201 10023 3169 10021 3161 9972 3199 9975

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 May 25, 3:06 PM CDT, 5 hours 4 minutes earlier.

Area forecast discussion, May 25, 3:06 PM CDT, 5 hours 4 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
306 PM CDT SAT MAY 25 2002

COLD FRONT HAS STALLED ALONG A STERLING CITY...WINTERS...CROSS PLAINS
LINE AT 20Z...WITH TEMPERATURES IN THE 70S TO THE NORTH AND 80S TO THE
SOUTH. CLEARING FROM EAST TO WEST HAD TAKEN PLACE SOUTH OF THE
FRONT...DUE TO OUTFLOW FROM A SEVERE THUNDERSTORM THAT MOVE THROUGH
BROWN COUNTY MID MORNING. ATMOSPHERE WAS UNSTABLE AGAIN TODAY. 17Z
SATELLITE BASE CAPES IN OUR SOUTHEASTERN ZONES WERE AROUND 2500 J/KG.
TOWARD THE BIG BEND AND TRANSPECOS CAPES WERE 4500 J/KG. CAP WAS NEARLY
NON EXISTANT WITH SATELLITE BASED CINH VALUES CLOSE TO ZERO.

BEST CHANCES OF STORM DEVELOPMENT ARE ALONG AND SOUTH OF THE FRONT
TODAY. FRONT AND OLD THUNDERSTORM BOUNDARIES WILL HELP INITIATE STORMS.
ALSO...STORMS THAT FORM IN THE TRANSPECOS AREAS WILL MOVE EAST INTO
EDWARDS PLATEAU.  WITH FAIRLY WEAK WINDS ALOFT...STORM SPEED WILL BE
SLOW SO THERE WILL BE THE THREAT OF LOCALLY HEAVY RAINS. SINCE ITS BEEN
SO DRY IN THE CONCHO VALLEY...EDWARDS PLATEAU AND HEARTLAND FOR THE
MONTH OF MAY...WILL NOT PUT OUT A FLASH FLOOD WATCH AT THIS TIME
HOWEVER. HAIL WILL AGAIN BE THE BIGGEST THREAT. THOUGH SMALL...WITH
WEAK VERTICAL SHEAR ALONG FRONT (LIGHT NORTH EAST WINDS NEAR SURFACE TO
SOUTH ALOFT) THERE IS A THAN OF A COUPLE ROTATING STORMS.

SUNDAY NIGHT...SOME UPPER LEVEL DIVERGENCE INDICATED AS A SHORTWAVE
MOVES NORTHEAST THROUGH NEW MEXICO...THEN MOVES EAST ACROSS THE TEXAS
PANHANDLE ON MONDAY. WESTERN SECTIONS ARE MORE FAVORED FOR
THUNDERSTORMS SUNDAY NIGHT...WITH THE BIG COUNTRY HAVING THE BEST
CHANCE OF THUNDERSTORMS ON MEMORIAL DAY.

A SLIGHT CHANCE OF STORMS WILL EXIST TUESDAY THROUGH SATURDAY...AS WEST
CENTRAL TEXAS WILL HAVE NORTH/NORTHWEST FLOW ALOFT.

PRELIMS...

ABI 060/082/064/083/066  3243
SJT 066/084/065/084/067  7232
JCT 067/085/065/087/067  7222

.SJT...NONE.

04

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 7:06 PM CDT	Flash Flood Warning	SJT	Coke	4 hr
May 25, 7:22 PM CDT	Flash Flood Warning	SJT	Coke	4 hr
May 25, 7:40 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	65 min
May 25, 8:22 PM CDT	Flash Flood Warning	SJT	McCulloch	3 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.