Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 75, NWS Fort Worth, TX

April 22, 2001Palo Pinto County, Parker County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 22, 2001, 7:24 PM CDT for Palo Pinto County, Parker County, Texas. It was in force for 66 min. 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: Apr 22, 2001, 7:24 PM CDT (00:24 UTC)
Expired: Apr 22, 2001, 8:30 PM CDT
In force: 66 min
Issued by: NWS Fort Worth, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Palo Pinto County, TX, Parker County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 72 km from the middle of the area, began a volume at 00:24 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 6:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.4 hours before the alert went out and 73 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: 1030 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1262 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KFWD 230026
SVRFTW
TXC363-367-230130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
724 PM CDT SUN APR 22 2001

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PALO PINTO COUNTY IN NORTH CENTRAL TEXAS
  PARKER COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 830 PM CDT

* AT 724 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED    
  A SEVERE THUNDERSTORM OVER MINERAL WELLS AND ANOTHER SEVERE        
  THUNDERSTORM 15 MILES SOUTHWEST OF MINERAL WELLS...MOVING          
  NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE WEATHERFORD

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THESE STORMS. TAKE 
COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

LAT...LON 3252 9830 3254 9812 3275 9778 3293 9777
          3301 9805

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 22, 2:08 PM CDT, 5 hours 16 minutes earlier.

Area forecast discussion, Apr 22, 2:08 PM CDT, 5 hours 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
208 PM CDT SUN APR 22 2001

CAP...CAP...AND MORE CAP. MAIN ENERGY STILL LOOKS TO MOVE NORTH OF
OUR FA TONIGHT...WHILE DRY LINE AND COLD FRONT SWEEP IN. STRONG
INSTABILITIES...CAPES AROUND 2000 J/KG AND HIGH HELICITIES...
COUPLED WITH VERY STRONG SOUTHERLY FLOW ALL ARE FAVORABLE FOR
SEVERE THUNDERSTORMS. STILL...18Z SOUNDINGS SHOW THE CAP HAS
WEAKENED A LITTLE...BUT IT CONTINUES TO BE STRONG. SO...THAT RETURNS
US TO THE BEGINNING...WILL THE CAP BREAK LIKE THE ETA SUGGEST. RIGHT
ENTRANCE REGION OF 100KT JET PROGGED TO COME ACROSS THIS EVENING
AND THIS MAY BE ENOUGH TO ERODE THE INVERSION AND LET A FEW STORMS
BREAK THROUGH. ASSUMING STORMS WILL BREAK...THEY SHOULD EVOLVE INTO
A LINE THAT SLOWS AS IT PUSHES EAST. THIS...COULD LEAD TO SOME
LOCALLY HEAVY RAINFALL...BUT NOT ENOUGH AT THIS TIME TO WARRANT
ISSUING A FLASH FLOOD WATCH. WILL USE LAST MINUTE SATELLITE DATA
TO FORM POPS FOR THIS EVENING/TONIGHT.

RAIN AND STORMS MAY LINGER ACROSS FAR SOUTHEASTERN ZONES TOMORROW
MORNING...OTHERWISE...HIGH BUILDS IN AND CLEARS THINGS OUT FOR
TOMORROW. FWC MOS LOOKS IN THE BALLPARK.

IN THE EXTENDED...RIDGE IN THE WEST KEEPS THINGS ON THE DRY SIDE...
WITH A WARMING TREND FOR THE END OF THE WEEK. 80

DFW 59/72/50/75 7100  ACT 60/74/50/75 7200

.FWD...CONTINUE WIND ADVISORY THROUGH THIS EVENING ALL ZONES.

In the hours before

Special weather statement, Apr 22, 3:23 PM CDT, 4 hours 1 minute before

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-230300-

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
323 PM CDT SUN APR 22 2001

THUNDERSTORMS...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT FOR ALL
OF NORTH TEXAS INCLUDING...THE DALLAS FORT WORTH METROPLEX AND WACO.

A STRONG UPPER LEVEL TROUGH OVER THE SOUTHERN ROCKIES WILL MOVE
RAPIDLY NORTHEAST ACROSS THE PLAINS THIS EVENING. WARM...MOIST AND
VERY UNSTABLE AIR HAS SPREAD NORTHWARD ACROSS MUCH OF TEXAS AHEAD OF
THE SYSTEM. A STRONG CAP...OR WARM LAYER IN MID LEVELS OF THE
ATMOSPHERE...HAS PREVENTED STRONG THUNDERSTORM DEVELOPMENT THUS FAR.
HOWEVER...VERTICAL MOTION ASSOCIATED WITH THE VIGOROUS UPPER
SYSTEM...AND CONVERGENCE ALONG THE DRYLINE...WILL ALLOW STORMS TO
INCREASE IN COVERAGE AND INTENSITY OVER WESTERN SECTIONS OF NORTH
TEXAS THIS EVENING.

THUNDERSTORMS WILL LIKELY FORM INTO A SQUALL LINE WITH DAMAGING
WINDS AND SOME HAIL THE MOST LIKELY THREATS. HOWEVER...VERTICAL
WIND SHEAR IS EXPECTED TO REMAIN MODERATELY STRONG...SO THERE IS SOME
POTENTIAL FOR AN ISOLATED TORNADIC SUPERCELL TO DEVELOP. THE GREATEST
THREAT WILL BE IN THE AREA NORTH OF INTERSTATE 20.

EMERGENCY MANAGERS ARE URGED TO MONITOR THE SITUATION THROUGHOUT
THE EVENING. SPOTTER ACTIVATION MAY BECOME NECESSARY EARLY THIS
EVENING NORTH AND WEST OF THE METROPLEX...AND ACROSS THE REMAINDER OF
NORTH TEXAS BY 9 PM.

WIND...
A WIND ADVISORY IS IN EFFECT FOR ALL OF NORTH TEXAS THIS EVENING.
SOUTH WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS ARE EXPECTED. THE WIND
WILL MAKE OPEN WATERS ON AREA LAKES ROUGH AND CHOPPY...SO BOATERS
SHOULD REMAIN IN PROTECTED AREAS. WINDS WILL DIMINISH OVERNIGHT.

9

Local storm report, Apr 22, 6:30 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
630 PM CDT SUN APR 22 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION....

0511 PM    POSSUM KINGDOM LAKE       TX   0.75 INCH HAIL
04/22/01   PALO_PINTO                     REPORTED BY SHERIFFS
                                          OFFICE.

0543 PM    5 S JACKSBORO             TX   0.88 INCH HAIL
04/22/01   JACK                           REPORTED BY SHERIFFS
                                          OFFICE.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 22, 7:02 PM CDT	Severe Thunderstorm Warning	FWD	Erath	43 min
Apr 22, 8:30 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto	45 min
Apr 22, 10:53 PM CDT	Severe Thunderstorm Warning	FWD	Jack	52 min
Apr 22, 11:29 PM CDT	Severe Thunderstorm Warning	FWD	Wise	46 min
Apr 23, 1:20 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every severe thunderstorm 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; radar from the NEXRAD Level II archive.