Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 242, NWS Fort Worth, TX

May 1, 20114 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 1, 2011, 4:36 PM CDT for 4 counties in Texas. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 1, 2011, 4:36 PM CDT (21:36 UTC)
Expired: May 1, 2011, 5:30 PM CDT
In force: 54 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Erath County, TX, Hood County, TX, Palo Pinto County, TX, Parker County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 69 km from the middle of the area, began a volume at 21:35 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.6 hours before the alert went out and 77 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: 785 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 574 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 328 m²/s²
0-3 km storm-relative helicity: 568 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 35.3

Open this sounding in Storm Lab

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 May 1, 3:46 PM CDT, 50 minutes earlier.

Area forecast discussion, May 1, 3:46 PM CDT, 50 minutes before

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Hazardous weather outlook, May 1, 3:36 PM CDT, 1 hour before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
336 PM CDT SUN MAY 1 2011

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-021100-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
336 PM CDT SUN MAY 1 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.
A CHANCE OF THUNDERSTORMS WILL CONTINUE THROUGH THE OVERNIGHT
HOURS. SOME STORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING...
MAINLY SOUTHEAST OF A LINE FROM TEMPLE TO ATHENS. THE PRIMARY
SEVERE THREATS WILL BE DAMAGING WINDS AND LARGE HAIL...THOUGH
TORNADOES WILL BE POSSIBLE NEAR A COLD FRONT.

TONIGHT...THE SEVERE THREAT WILL BE PRIMARILY NORTH OF THE FRONT
ACROSS MUCH OF NORTH TEXAS. HAIL WILL BE THE MAIN SEVERE THREAT
OVERNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THUNDERSTORM CHANCES WILL CONTINUE MONDAY THROUGH EARLY TUESDAY
MORNING. IT WILL BE LESS FAVORABLE FOR SEVERE STORMS...BUT LOCALLY
HEAVY RAINFALL WILL BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUESTED THIS AFTERNOON AND EVENING...
PRIMARILY SOUTHEAST OF A LINE FROM TEMPLE TO ATHENS. LIMITED
SPOTTER ACTIVATION MAY BE REQUESTED ELSEWHERE OVERNIGHT.

25

In the hours before

Local storm report, May 1, 12:16 PM CDT, 4 hours 20 minutes before

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Local storm report, May 1, 12:26 PM CDT, 4 hours 10 minutes before

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Local storm report, May 1, 1:34 PM CDT, 3 hours 2 minutes before

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Special weather statement, May 1, 3:34 PM CDT, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
334 PM CDT SUN MAY 1 2011

TXZ129-130-141-012130-
EASTLAND TX-ERATH TX-COMANCHE TX-
334 PM CDT SUN MAY 1 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN COMANCHE COUNTY
  EASTERN EASTLAND COUNTY
  ERATH COUNTY

AT 334 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 9 MILES NORTH OF COMANCHE...MOVING NORTHEAST AT
45 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE DE LEON...DUBLIN...GORMAN...
STEPHENVILLE...HUCKABAY AND MORGAN MILL.

PENNY-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THIS
STORM.

LAT...LON 3252 9863 3252 9807 3223 9795 3193 9860
      3204 9876
TIME...MOT...LOC 2034Z 220DEG 38KT 3205 9861

Local storm report, May 1, 3:54 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
354 PM CDT SUN MAY 01 2011

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0340 PM     HAIL             DE LEON                 32.12N  98.55W
05/01/2011  E1.00 INCH       COMANCHE           TX   LAW ENFORCEMENT

            QUARTER SIZE HAIL IN DELEON. NO WIND AND LITTLE
            LIGHTNING.

Special weather statement, May 1, 4:26 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
426 PM CDT SUN MAY 1 2011

TXZ116-117-130-131-012230-
PALO PINTO TX-PARKER TX-HOOD TX-ERATH TX-
426 PM CDT SUN MAY 1 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN ERATH COUNTY
  NORTHERN HOOD COUNTY
  EASTERN PALO PINTO COUNTY
  PARKER COUNTY

AT 426 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 10 MILES NORTH OF STEPHENVILLE...MOVING NORTHEAST
AT 40 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE ALEDO...ANNETTA...BRIAR...
COOL...GORDON...HUDSON OAKS...LIPAN...MINERAL WELLS...OAK TRAIL
SHORES...RENO...SPRINGTOWN...STEPHENVILLE...WEATHERFORD...WILLOW
PARK...HUCKABAY...MORGAN MILL...POOLVILLE AND MINERAL WELLS STATE
PARK.

NICKEL-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

LAT...LON 3265 9843 3301 9805 3300 9754 3258 9756
      3217 9827 3231 9845
TIME...MOT...LOC 2126Z 226DEG 34KT 3240 9818

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:03 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Kaufman, Rockwall	57 min
Apr 30, 7:24 PM CDT	Severe Thunderstorm Warning	FWD	Fannin, Hunt	36 min
Apr 30, 7:52 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Lamar	56 min
Apr 30, 7:56 PM CDT	Special Weather Statement	FWD	Hamilton	34 min
May 1, 1:32 AM CDT	Special Weather Statement	FWD	Stephens	28 min
May 1, 1:36 AM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath, Palo Pinto, Stephens	54 min
May 1, 2:27 AM CDT	Severe Thunderstorm Warning	FWD	Erath, Hood, Palo Pinto, Parker	63 min
May 1, 3:09 AM CDT	Severe Thunderstorm Warning	FWD	Young	51 min
May 1, 3:21 AM CDT	Severe Thunderstorm Warning	FWD	Hood, Johnson, Parker, Tarrant	54 min
May 1, 3:46 AM CDT	Severe Thunderstorm Warning	FWD	Jack, Young	44 min
May 1, 4:10 AM CDT	Special Weather Statement	FWD	Cooke	35 min
May 1, 4:12 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Johnson, Tarrant	48 min
May 1, 4:27 AM CDT	Severe Thunderstorm Warning	FWD	Jack, Montague, Wise	48 min
May 1, 4:41 AM CDT	Severe Thunderstorm Warning	FWD	Cooke	49 min
May 1, 4:58 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Kaufman	43 min
May 1, 5:30 AM CDT	Severe Thunderstorm Warning	FWD	Montague	30 min
May 1, 5:46 AM CDT	Special Weather Statement	FWD	Grayson	29 min
May 1, 6:05 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	25 min
May 1, 6:09 AM CDT	Severe Thunderstorm Warning	FWD	Montague	36 min
May 1, 6:41 AM CDT	Special Weather Statement	FWD	Cooke	34 min
May 1, 6:50 AM CDT	Special Weather Statement	FWD	Stephens	25 min
May 1, 6:56 AM CDT	Severe Thunderstorm Warning	FWD	Eastland, Stephens, Young	64 min
May 1, 7:04 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Cooke, Denton, Grayson	56 min
May 1, 7:09 AM CDT	Special Weather Statement	FWD	Fannin	36 min
May 1, 7:42 AM CDT	Severe Thunderstorm Warning	FWD	Lamar	26 min
May 1, 7:46 AM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath, Palo Pinto	44 min
May 1, 8:10 AM CDT	Special Weather Statement	FWD	Fannin	35 min
May 1, 8:21 AM CDT	Severe Thunderstorm Warning	FWD	Erath, Hood, Palo Pinto, Parker	54 min
May 1, 8:58 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	46 min
May 1, 10:08 AM CDT	Special Weather Statement	FWD	Wise	37 min
May 1, 10:21 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Tarrant, Wise	54 min
May 1, 11:06 AM CDT	Special Weather Statement	FWD	Grayson	24 min
May 1, 11:37 AM CDT	Special Weather Statement	FWD	Grayson	38 min
May 1, 11:57 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	42 min
May 1, 3:34 PM CDT	Special Weather Statement	FWD	Erath	56 min
May 1, 4:26 PM CDT	Special Weather Statement	FWD	Erath, Hood, Palo Pinto, Parker	64 min
May 1, 4:52 PM CDT	Special Weather Statement	FWD	Van Zandt	23 min
May 1, 5:29 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	61 min
May 1, 6:26 PM CDT	Areal Flood Advisory	FWD	Cooke	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning in 2011

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.