Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 18, NWS Fort Worth, TX

February 12, 2008Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Feb 12, 2008, 1:44 AM CST for Denton County, Texas. It was in force for 16 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: Feb 12, 2008, 1:44 AM CST (07:44 UTC)
Expired: Feb 12, 2008, 2:00 AM CST
In force: 16 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 72 km from the middle of the area, began a volume at 07:43 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
Feb 11, 7:57 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.7 hours before the alert went out and 226 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 413 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 343 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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 Feb 11, 11:45 PM CST, 1 hour 59 minutes earlier.

Area forecast discussion, Feb 11, 11:45 PM CST, 1 hour 59 minutes before

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Hazardous weather outlook, Feb 11, 8:04 PM CST, 5 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
804 PM CST MON FEB 11 2008

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-121100-
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-
804 PM CST MON FEB 11 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM NORTH OF A LINE
FROM PALO PINTO TO DALLAS TO SULPHUR SPRINGS. THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG A COLD FRONT THIS EVENING NEAR THE RED
RIVER...WITH THE STORMS AND THE COLD FRONT MOVING SOUTHEAST OVER THE
REMAINDER OF NORTH TEXAS OVERNIGHT. THE MAIN THREAT WITH THESE
STORMS WILL BE LARGE HAIL. DAMAGING WINDS WILL BE POSSIBLE WITH
STORMS THAT DEVELOP ALONG THE FRONT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE AN ELEVATED FIRE DANGER MAINLY ALONG AND WEST OF
INTERSTATE 35 WEDNESDAY AND THURSDAY AFTERNOON.

A STRONG UPPER LEVEL DISTURBANCE IS EXPECTED TO MOVE INTO WEST TEXAS
BY FRIDAY WITH A COLD FRONT MOVING THROUGH THE AREA DURING THE DAY
FRIDAY. THERE IS A CHANCE OF SLEET MAINLY WEST OF A GAINESVILLE TO
WEATHERFORD TO GOLDTHWAITE LINE SATURDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED AFTER 8 PM THIS EVENING.

07/85

In the hours before

Special weather statement, Feb 11, 9:13 PM CST, 4 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
913 PM CST MON FEB 11 2008

TXZ095-120345-
LAMAR TX-
913 PM CST MON FEB 11 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHWESTERN LAMAR COUNTY

AT 913 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 18 MILES WEST OF PARIS...MOVING NORTHEAST AT 30
MPH.

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

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CST
TUESDAY MORNING FOR NORTHEASTERN TEXAS.

LAT...LON 3395 9556 3391 9553 3366 9580 3370 9586
      3385 9585 3388 9579 3391 9574 3391 9567
      3396 9560
TIME...MOT...LOC 0313Z 221DEG 29KT 3379 9582

85/HAMPSHIRE

Special weather statement, Feb 11, 10:53 PM CST, 2 hours 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1053 PM CST MON FEB 11 2008

TXZ091-092-102-120530-
MONTAGUE TX-COOKE TX-WISE TX-
1053 PM CST MON FEB 11 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHWESTERN COOKE COUNTY
  SOUTHEASTERN MONTAGUE COUNTY
  NORTHEASTERN WISE COUNTY

AT 1053 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 14 MILES NORTH OF DECATUR...MOVING EAST AT 30
MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE ALVORD AND FORESTBURG.

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

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CST
TUESDAY MORNING FOR NORTHEASTERN TEXAS.

LAT...LON 3349 9777 3367 9729 3346 9719 3343 9729
      3344 9731 3344 9738 3340 9739 3332 9769
TIME...MOT...LOC 0453Z 248DEG 29KT 3344 9763

85

Local storm report, Feb 11, 11:27 PM CST, 2 hours 17 minutes before

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Special weather statement, Feb 12, 12:09 AM CST, 1 hour 35 minutes before

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Special weather statement, Feb 12, 12:59 AM CST, 45 minutes before

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Special weather statement, Feb 12, 1:35 AM CST, 9 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 11, 9:13 PM CST	Special Weather Statement	FWD	Lamar	32 min
Feb 11, 10:53 PM CST	Special Weather Statement	FWD	Cooke	37 min
Feb 11, 11:00 PM CST	Severe Thunderstorm Warning	FWD	Cooke, Montague, Wise	45 min
Feb 12, 12:09 AM CST	Special Weather Statement	FWD	Grayson	36 min
Feb 12, 12:59 AM CST	Special Weather Statement	FWD	Denton	31 min
Feb 12, 1:35 AM CST	Special Weather Statement	FWD	Denton	25 min
Feb 12, 2:22 AM CST	Severe Thunderstorm Warning	FWD	Dallas	38 min
Feb 12, 3:19 AM CST	Special Weather Statement	FWD	Erath	26 min
Feb 12, 4:28 AM CST	Special Weather Statement	FWD	Ellis	32 min
Feb 12, 4:36 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Hill, Navarro	39 min
Feb 12, 5:14 AM CST	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Henderson, Navarro	61 min
Feb 12, 5:29 AM CST	Special Weather Statement	FWD	Lampasas	31 min
Feb 12, 5:33 AM CST	Severe Thunderstorm Warning	FWD	Lampasas	57 min
Feb 12, 6:12 AM CST	Special Weather Statement	FWD	Freestone, Limestone	33 min
Feb 12, 6:16 AM CST	Special Weather Statement	FWD	Coryell	29 min
Feb 12, 6:30 AM CST	Special Weather Statement	FWD	Falls	30 min
Feb 12, 6:46 AM CST	Special Weather Statement	FWD	Freestone, Leon	59 min
Feb 12, 7:01 AM CST	Special Weather Statement	FWD	Bell, Falls, Milam, Robertson	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.