Alert archive / Texas / Flash Flood Warnings in 2001
Flash Flood Warning 8, NWS San Angelo, TX
NWS San Angelo, TX issued this flash flood warning at Aug 18, 2001, 5:39 PM CDT for Fisher 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 18, 2001, 5:39 PM CDT (22:39 UTC)
- Expired
- Aug 18, 2001, 8:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS San Angelo, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Fisher County, TX
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 10.7 hours before the alert went out and 189 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.
- Mixed-layer CAPE
- 1380 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1243 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KSJT 182240 FFWSJT TXC151-190145- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN ANGELO TX 539 PM CDT SAT AUG 18 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLASH FLOOD WARNING FOR... FISHER COUNTY IN NORTHWEST TEXAS * UNTIL 845 PM CDT * AT 537 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN 5 MILES SOUTHWEST OF LONGWORTH...OR ABOUT 9 MILES NORTH OF SWEETWATER. 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. LAT...LON 3275 10029 3272 10054 3254 10057 3254 10019
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 18, 2:00 PM CDT, 3 hours 39 minutes earlier.
Area forecast discussion, Aug 18, 2:00 PM CDT, 3 hours 39 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN ANGELO TX 200 PM CDT SAT AUG 18 2001 LATEST WATER VAPOR IMAGERY INDICATING MID- AND UPPER-LEVEL MOISTURE STILL LINGERING OVER TEXAS THIS AFTERNOON. LATEST LAMP SURFACE WIND STREAMLINE ANALYSIS SHOWS MAINLY SOUTHERLY FLOW OVER TEXAS WITH SOME LOW-LEVEL CONVERGENCE ALONG AND NEAR THE RED RIVER. LATEST METAR DATA SHOWS SURFACE DEWPOINTS IN THE 60S ACROSS MOST OF CWFA. NEAR TERM...MODELS CONTINUE TO MOVE UPPER RIDGE OVER CENTRAL TEXAS BY TOMORROW AFTERNOON. MODEL TIME-HEIGHT SERIES SHOWS MUCH DRIER AIR AT 700 MB AND ABOVE MOVING OVER TEXAS BY MIDNIGHT TONIGHT. IN ADDITION...APPEARS 850 MB TEMPERATURES WILL WARM ONE OR TWO DEGREES CELSIUS DURING THE NEXT 48 HOURS. OUTFLOW BOUNDARY...WHICH MOVED ACROSS OUR CWFA A FEW HOURS AGO...MAY BE A FOCUS FOR CONVECTION DEVELOPING THIS EVENING. THUS...WILL INCLUDE A MENTION OF EVENING SHOWERS OR THUNDERSTORMS FOR THE SOUTHERN ZONES. OTHERWISE...POPS NIL. WITH DRIER AIR AND 850 MB WARMING BEGINNING...EXPECT SUNNY DAYS...CLEAR NIGHTS...AND AFTERNOON HIGHS AROUND 100 BY THE END OF THE PERIOD. EXTENDED...WILL CONTINUE DRY EXTENDED WITH LOWS IN THE LOWER 70S AND AFTERNOON HIGHS AROUND 100...WELL ABOVE SEASONAL NORMALS. CCF PRELIMS... ABI 071/097/072/099 00/00/00/00 SJT 072/098/073/100 00/00/00/00 JCT 074/099/073/101 20/00/00/00 .SJT...NONE. 23/HUBER
In the hours before
Special weather statement, Aug 18, 2:30 PM CDT, 3 hours 9 minutes before
TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140- 154-155-168>170-182300- WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN ANGELO TX 230 PM CDT SAT AUG 18 2001 ...ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE IN THE NORTHERN EDWARDS PLATEAU AND NORTHWEST HILL COUNTRY THIS EVENING... AFTERNOON HEATING COMBINED WITH A MOIST AND SLIGHTLY UNSTABLE ATMOSPHERE WILL ALLOW THE DEVELOPMENT OF ISOLATED THUNDERSTORMS THIS EVENING...ALONG AND SOUTH OF AN OZONA...ELDORADO...MASON LINE. WITH ONLY WEAK INSTABILITY...STORMS THAT DEVELOP ARE NOT EXPECTED TO BECOME SEVERE. STORMS WILL END IN THE EARLY EVENING WITH LOSS OF THE SUNS HEATING. DRIER AIR MOVING IN FROM THE NORTH WILL PREVENT THE DEVELOPMENT OF STORMS ELSEWHERE IN WEST CENTRAL TEXAS. SPOTTER ACTIVATION IS NOT ANTICIPATED. FOR THE SOUTHWEST TEXAS AND SOUTHEAST NEW MEXICO OUTLOOK SEE PRODUCT LBBSPSMAF. FOR THE SOUTH PLAINS OUTLOOK SEE PRODUCT LBBSPSLBB. FOR THE CENTRAL OKLAHOMA OUTLOOK SEE PRODUCT OKCSPSOKC. FOR THE NORTH TEXAS OUTLOOK SEE PRODUCT FTWSPSFTW. FOR THE SOUTH CENTRAL TEXAS OUTLOOK SEE PRODUCT SATSPSSAT. 04
Special weather statement, Aug 18, 4:00 PM CDT, 1 hour 39 minutes before
TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140- 154-155-168>170-182300- WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE SAN ANGELO TX 400 PM CDT SAT AUG 18 2001 ...ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS WEST CENTRAL TEXAS THROUGH THIS EVENING... AFTERNOON HEATING COMBINED WITH A MOIST AND SLIGHTLY UNSTABLE ATMOSPHERE WILL ALLOW THE DEVELOPMENT OF ISOLATED THUNDERSTORMS THROUGH EARLY EVENING ACROSS MUCH OF WEST CENTRAL TEXAS. THE BEST CHANCE OF DEVELOPMENT WILL BE ALONG AND NORTH OF INTERSTATE 20 IN THE BIG COUNTRY...AND ALONG INTERSTATE 10 IN THE NORTHERN EDWARDS PLATEAU AND NORTHWEST HILL COUNTRY. THESE AREAS HAVE HAD THE MOST AFTERNOON HEATING BY THE SUN. WITH ONLY WEAK INSTABILITY...STORMS THAT DEVELOP ARE NOT EXPECTED TO BECOME SEVERE. STORMS WILL END IN THE EARLY EVENING WITH LOSS OF THE SUNS HEATING. SPOTTER ACTIVATION IS NOT ANTICIPATED. FOR THE SOUTHWEST TEXAS AND SOUTHEAST NEW MEXICO OUTLOOK SEE PRODUCT LBBSPSMAF. FOR THE SOUTH PLAINS OUTLOOK SEE PRODUCT LBBSPSLBB. FOR THE CENTRAL OKLAHOMA OUTLOOK SEE PRODUCT OKCSPSOKC. FOR THE NORTH TEXAS OUTLOOK SEE PRODUCT FTWSPSFTW. FOR THE SOUTH CENTRAL TEXAS OUTLOOK SEE PRODUCT SATSPSSAT. 04
The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 4:17 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 43 min |
Nearby
Flash Flood Warnings in Texas, 2001Every flash flood warning in 2001
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.