Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 41, NWS San Angelo, TX

August 25, 1998Crockett County, Texas

NWS San Angelo, TX issued this flash flood warning at Aug 25, 1998, 8:15 AM CDT for Crockett County, Texas. It was in force for 4 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 25, 1998, 8:15 AM CDT (13:15 UTC)
Expired: Aug 25, 1998, 12:00 PM CDT
In force: 4 hr
Issued by: NWS San Angelo, TX
Area: Whole counties

County Crockett County, TX

The radar

The San Angelo radar (KSJT), 113 km from the middle of the area, began a volume at 13:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 1.3 hours before the alert went out and 156 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: 459 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 780 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: -4 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 
TTAA00 KSJT 251320 COR
FFWSJT
TXC105-251700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED FOR RAINFALL BETWEEN 5 AND 8 AM
NATIONAL WEATHER SERVICE SAN ANGELO TX
815 AM CDT TUE AUG 25 1998

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN AND NORTHERN CROCKETT COUNTY IN WEST CENTRAL TEXAS

* UNTIL NOON CDT

* AREAS ALONG AND NORTH OF HIGHWAY 190 HAVE IN NORTHERN CROCKETT
  COUNTY ARE ESTIMATED BY RADAR TO HAVE RECEIVED UP TO 7 INCHES OF
  RAINFALL BETWEEN 5 AM AND 8 AM. THIS RAINFALL WILL CONTINUE TO RUN
  OFF AND PRODUCE FLASH FLOODING.
*
DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER
DEPTH MAY BE TOO GREAT FOR SAFE PASSAGE ANnD THE ROAD UNDERNEATH MAY
NOT BE INTACT.

MKD

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 25, 2:29 AM CDT, 5 hours 46 minutes earlier.

Area forecast discussion, Aug 25, 2:29 AM CDT, 5 hours 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
229 AM CDT TUE AUG 25 1998

GOES IR SHOWS REMNANTS OF T.D. CHARLIE SE OF THE BIG BEND AND OVER
THE PECOS RIVER/WESTERN CROCKETT CO. THIS LATTER PORTION OF CHARLIE
SPLIT OFF ABOUT 20 HOURS AGO...DRIFTED NORTHWEST AND THEN EAST AGAIN
TO NEAR ITS PRESENT POSITION NEAR THE PECOS.

HIGH RH FROM THE SFC TO 850 MB WILL CONTINUE OVER WC TX TODAY...
RESULTING IN WEAK CONVECTIVE INHIBITION. OTHER THAN OUTFLOW FROM THE
PRESENT EDWARDS PLATEAU CONVECTION...LITTLE OR NO BOUNDARIES EVIDENT
ON RADAR OR SFC MAP. HOWEVER...EXPECT DIFFERENTIAL HEATING TO RESULT
IN SCATTERED CONVECTION OVER THE CONCHO VALLEY...WITH BETTER COVERAGE
OVER THE EDWARDS PLATEAU...NEARER TO CHARLIE/S OUTFLOW. FAN/FWC POPS
AGAIN APPEAR OVERDONE.

SLIGHT 700 MB THETA-E COOLING FORECAST BY THE ETA FROM 24-48 HOURS.
WITH SIMILAR THICKNESS VALUES AND EXPECTED SFC DEWPOINTS NEAR 70F...
BLEND OF PERSISTENCE AND GUIDANCE APPEARS BEST FOR TEMPS/POPS THE
NEXT 2 DAYS.

ABI 094/072 22
SJT 088/071 33
JCT 086/073 43

14

In the hours before

Special weather statement, Aug 25, 5:34 AM CDT, 2 hours 41 minutes before

TXZ049-053-054-064>066-071>073-076>078-098-099-113-114-127-128-
139-140-154-155-168>170-251930-

WEST CENTRAL TEXAS THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
534 AM CDT TUE AUG 25 1998

...SHOWERS AND NONSEVERE THUNDERSTORMS EXPECTED OVER WEST CENTRAL
TEXAS TODAY...

A TROPICAL AIRMASS WILL REMAIN OVER WEST CENTRAL TEXAS TODAY. THE
REMNANTS OF TROPICAL DEPRESSION CHARLIE WILL CONTINUE TO AFFECT
SOUTHERN AND CENTRAL PORTIONS OF WEST CENTRAL TEXAS...WHILE DAYTIME
HEATING WILL SPAWN SCATTERED SHOWERS AND THUNDERSTORMS OVER THE
REMAINDER OF THE OUTLOOK AREA. DUE TO INSUFFICIENT INSTABILITY AND
WEAK VERTICAL WIND SHEAR...SEVERE THUNDERSTORMS ARE NOT EXPECTED.
HOWEVER...FLASH FLOODING MAY RESULT FROM HEAVY RAIN.

A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THE FOLLOWING COUNTIES...
WHERE THE RISK OF FLASH FLOODING IS GREATEST: CROCKETT...SUTTON...
SCHLEICHER AND IRION.

SPOTTER ACTIVATION IS NOT ANTICIPATED.

FOR THE SOUTHWEST TEXAS AND SOUTHEAST NEW MEXICO OUTLOOK SEE
PRODUCT LBBSPSMAF. FOR THE SOUTH CENTRAL TEXAS OUTLOOK SEE PRODUCT
SATSPSSAT. FOR THE CENTRAL OKLAHOMA OUTLOOK SEE PRODUCT OKCSPSOKC.

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 1:29 AM CDT	Flash Flood Warning	SJT	Crockett	4 hr
Aug 25, 3:16 AM CDT	Flash Flood Warning	SJT	Crockett, Schleicher	2 hr
Aug 25, 4:20 AM CDT	Flash Flood Warning	SJT	Irion	2 hr
Aug 25, 5:22 AM CDT	Flash Flood Warning	SJT	Crockett	3 hr
Aug 25, 6:48 AM CDT	Flash Flood Warning	SJT	Irion	2 hr
Aug 25, 7:02 AM CDT	Flash Flood Warning	SJT	Coke, Tom Green	3 hr
Aug 25, 8:59 AM CDT	Flash Flood Warning	SJT	Irion	3 hr
Aug 25, 9:06 AM CDT	Flash Flood Warning	SJT	Schleicher	3 hr
Aug 25, 9:10 AM CDT	Flash Flood Warning	SJT	Irion	3 hr
Aug 25, 10:24 AM CDT	Flash Flood Warning	SJT	Sutton	3 hr
Aug 25, 11:55 AM CDT	Flash Flood Warning	SJT	Crockett, Schleicher	5 hr
Aug 25, 1:09 PM CDT	Flash Flood Warning	SJT	Sutton	4 hr
Aug 25, 4:48 PM CDT	Flash Flood Warning	SJT	Crockett, Schleicher, Sutton	3 hr

Nearby

Flash Flood Warnings in Texas, 1998 Every flash flood warning in 1998

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; radar from the NEXRAD Level II archive.