Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 401, NWS Fort Worth, TX

November 11, 2008Erath County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Nov 11, 2008, 4:06 AM CST for Erath County, Texas. It was in force for 39 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: Nov 11, 2008, 4:06 AM CST (10:06 UTC)
Expired: Nov 11, 2008, 4:45 AM CST
In force: 39 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Erath County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 94 km from the middle of the area, began a volume at 10:07 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 00:00Z, 10.1 hours before the alert went out and 109 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: 182 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 457 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 10.4

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 Nov 11, 3:01 AM CST, 1 hour 5 minutes earlier.

Area forecast discussion, Nov 11, 3:01 AM CST, 1 hour 5 minutes before

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Hazardous weather outlook, Nov 10, 8:56 PM CST, 7 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
856 PM CST MON NOV 10 2008

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-111100-
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-
856 PM CST MON NOV 10 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.
THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE ACROSS ALL OF NORTH
TEXAS THROUGH TONIGHT. ISOLATED TORNADOES AS WELL AS WIND GUSTS
OVER 60 MPH AND LARGE HAIL WILL BE POSSIBLE SOUTH OF A LINE FROM
RISING STAR...TO WEATHERFORD...TO BONHAM. FLASH FLOODING IS ALSO A
CONCERN WITH AMPLE MOISTURE IN PLACE AND TRAINING OF SHOWERS AND
THUNDERSTORMS. A TORNADO WATCH IS IN EFFECT FOR MUCH OF CENTRAL
AND SOUTHWESTERN NORTH TEXAS THROUGH 2 AM CDT TUESDAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
SEVERE WEATHER WILL BE ONGOING TUESDAY MORNING WITH A TORNADO
WATCH IN EFFECT UNTIL 2 AM CDT FOR PORTIONS OF NORTH TEXAS. IN
ADDITION...A COLD FRONT WILL MOVE INTO NORTH TEXAS BY MID
MORNING...TRIGGERING MORE THUNDERSTORMS THROUGHOUT THE DAY AS IT
MOVES SLOWLY SOUTHEAST AND EVENTUALLY STALLS. THE PRIMARY THREATS
FROM STORMS ON TUESDAY WILL BE LARGE HAIL AND DAMAGING
WINDS...THOUGH AN ISOLATED TORNADO CANNOT BE RULED DURING THE
AFTERNOON HOURS ALONG AND SOUTH OF THE FRONT. FLASH FLOODING WILL
ALSO BE A CONCERN WITH HIGH LOW LEVEL MOISTURE IN PLACE.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE NEEDED SOUTH OF A LINE FROM
RISING STAR...TO WEATHERFORD...TO BONHAM.

13

In the hours before

Special weather statement, Nov 11, 2:28 AM CST, 1 hour 38 minutes before

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Special weather statement, Nov 11, 3:10 AM CST, 56 minutes before

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Special weather statement, Nov 11, 3:35 AM CST, 31 minutes before

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Special weather statement, Nov 11, 3:40 AM CST, 26 minutes before

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Special weather statement, Nov 11, 3:48 AM CST, 18 minutes before

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Special weather statement, Nov 11, 3:56 AM CST, 10 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
Nov 10, 6:32 PM CST	Special Weather Statement	FWD	Hood, Tarrant	58 min
Nov 10, 6:44 PM CST	Areal Flood Advisory	FWD	Tarrant	2 hr
Nov 10, 6:49 PM CST	Areal Flood Advisory	FWD	Comanche, Erath	116 min
Nov 10, 7:09 PM CST	Special Weather Statement	FWD	Erath	36 min
Nov 10, 7:10 PM CST	Special Weather Statement	FWD	Tarrant	35 min
Nov 10, 7:11 PM CST	Special Weather Statement	FWD	Collin	34 min
Nov 10, 7:29 PM CST	Flash Flood Warning	FWD	Collin, Denton, Tarrant	3 hr
Nov 10, 7:30 PM CST	Severe Thunderstorm Warning	FWD	Erath	45 min
Nov 10, 7:37 PM CST	Special Weather Statement	FWD	Tarrant	23 min
Nov 10, 7:38 PM CST	Flash Flood Warning	FWD	Comanche, Erath	3 hr
Nov 10, 8:08 PM CST	Special Weather Statement	FWD	Dallas	67 min
Nov 10, 8:23 PM CST	Special Weather Statement	FWD	Hood	37 min
Nov 10, 8:41 PM CST	Flash Flood Warning	FWD	Hood, Parker	2 hr
Nov 10, 8:57 PM CST	Special Weather Statement	FWD	Tarrant	33 min
Nov 10, 8:59 PM CST	Flash Flood Warning	FWD	Collin, Dallas, Tarrant	3 hr
Nov 10, 9:10 PM CST	Special Weather Statement	FWD	Collin	35 min
Nov 10, 9:28 PM CST	Special Weather Statement	FWD	Hunt	32 min
Nov 10, 10:25 PM CST	River Flood Warning	FWD	Dallas	11 hr
Nov 10, 11:04 PM CST	Special Weather Statement	FWD	Kaufman, Rockwall	26 min
Nov 10, 11:59 PM CST	Areal Flood Warning	FWD	Dallas, Tarrant	3 hr
Nov 11, 2:05 AM CST	Special Weather Statement	FWD	Palo Pinto	25 min
Nov 11, 2:28 AM CST	Special Weather Statement	FWD	Parker	32 min
Nov 11, 3:03 AM CST	Areal Flood Warning	FWD	Dallas	3 hr
Nov 11, 3:10 AM CST	Special Weather Statement	FWD	Tarrant	35 min
Nov 11, 3:18 AM CST	Severe Thunderstorm Warning	FWD	Eastland	57 min
Nov 11, 3:35 AM CST	Special Weather Statement	FWD	Tarrant	25 min
Nov 11, 3:40 AM CST	Special Weather Statement	FWD	Collin	35 min
Nov 11, 3:48 AM CST	Special Weather Statement	FWD	Erath	27 min
Nov 11, 3:56 AM CST	Special Weather Statement	FWD	Dallas	34 min
Nov 11, 4:44 AM CST	Special Weather Statement	FWD	Hood, Somervell	31 min
Nov 11, 5:02 AM CST	Special Weather Statement	FWD	Hunt	28 min
Nov 11, 5:09 AM CST	Special Weather Statement	FWD	Johnson	36 min
Nov 11, 5:37 AM CST	Special Weather Statement	FWD	Coryell, Lampasas	23 min
Nov 11, 6:01 AM CST	Severe Thunderstorm Warning	FWD	Coryell	59 min
Nov 11, 6:44 AM CST	Severe Thunderstorm Warning	FWD	McLennan	61 min
Nov 11, 7:32 AM CST	Special Weather Statement	FWD	Falls	28 min
Nov 11, 9:29 AM CST	River Flood Warning	FWD	Dallas	25 hr
Nov 11, 5:45 PM CST	Special Weather Statement	FWD	Milam	30 min
Nov 11, 5:55 PM CST	Special Weather Statement	FWD	Milam	35 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.