Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 129, NWS Fort Worth, TX

April 8, 2008Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 8, 2008, 10:32 PM CDT for Denton County, Texas. It was in force for 58 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: Apr 8, 2008, 10:32 PM CDT (03:32 UTC)
Expired: Apr 8, 2008, 11:30 PM CDT
In force: 58 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 03:35 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 00:00Z, 3.5 hours before the alert went out and 45 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: 209 J/kg
Mixed-layer CIN: -242 J/kg
Mixed-layer LCL: 1167 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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 Apr 8, 9:16 PM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, Apr 8, 9:16 PM CDT, 1 hour 16 minutes before

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Hazardous weather outlook, Apr 8, 7:37 PM CDT, 2 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
737 PM CDT TUE APR 8 2008

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-091100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
737 PM CDT TUE APR 8 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...
WIDELY SCATTERED THUNDERSTORMS...SOME SEVERE WITH LARGE HAIL...
DAMAGING WINDS...AND A BRIEF TORNADO OR TWO...WILL OCCUR THIS EVENING
SOUTH OF INTERSTATES 20 AND 30.

THUNDERSTORMS WILL EXPAND NORTH AND IN COVERAGE ACROSS ALL OF NORTH
TEXAS DURING THE OVERNIGHT. ALONG WITH SEVERE WEATHER THREATS...
LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WIDESPREAD STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED WEDNESDAY AND
AND THURSDAY. LARGE HAIL...DAMAGING WINDS..AND FLASH FLOODING WILL
BE THE MAIN THREATS. A FEW TORNADOES ARE POSSIBLE.

THE THREAT OF HAZARDOUS WEATHER WILL END BY THURSDAY EVENING.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUESTED THROUGH TONIGHT.

05/

In the hours before

Local storm report, Apr 8, 9:30 PM CDT, 1 hour 2 minutes before

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Local storm report, Apr 8, 9:35 PM CDT, 57 minutes before

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Local storm report, Apr 8, 9:38 PM CDT, 54 minutes before

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Local storm report, Apr 8, 10:03 PM CDT, 29 minutes before

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Special weather statement, Apr 8, 10:14 PM CDT, 18 minutes before

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Local storm report, Apr 8, 10:18 PM CDT, 14 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
Apr 8, 7:03 PM CDT	Severe Thunderstorm Warning	FWD	Coryell, Hamilton, Lampasas, Mills	57 min
Apr 8, 7:26 PM CDT	Tornado Warning	FWD	Coryell, Hamilton, Lampasas	49 min
Apr 8, 8:11 PM CDT	Tornado Warning	FWD	Coryell	64 min
Apr 8, 8:14 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	61 min
Apr 8, 8:31 PM CDT	Severe Thunderstorm Warning	FWD	Van Zandt	29 min
Apr 8, 8:41 PM CDT	Tornado Warning	FWD	Lampasas	64 min
Apr 8, 8:55 PM CDT	Tornado Warning	FWD	Bell	50 min
Apr 8, 8:58 PM CDT	Severe Thunderstorm Warning	FWD	McLennan	62 min
Apr 8, 9:18 PM CDT	Severe Thunderstorm Warning	FWD	Coryell	16 min
Apr 8, 9:43 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	32 min
Apr 8, 10:14 PM CDT	Special Weather Statement	FWD	Tarrant	31 min
Apr 8, 10:38 PM CDT	Special Weather Statement	FWD	Tarrant	37 min
Apr 8, 10:52 PM CDT	Severe Thunderstorm Warning	FWD	Tarrant	53 min
Apr 8, 10:56 PM CDT	Severe Thunderstorm Warning	FWD	Kaufman	32 min
Apr 8, 10:58 PM CDT	Severe Thunderstorm Warning	FWD	Fannin	27 min
Apr 8, 11:04 PM CDT	Special Weather Statement	FWD	Coryell	26 min
Apr 8, 11:07 PM CDT	Severe Thunderstorm Warning	FWD	Collin	53 min
Apr 8, 11:15 PM CDT	Special Weather Statement	FWD	Lamar	30 min
Apr 8, 11:25 PM CDT	Special Weather Statement	FWD	Rains	35 min
Apr 8, 11:33 PM CDT	Severe Thunderstorm Warning	FWD	Van Zandt	22 min
Apr 8, 11:36 PM CDT	Severe Thunderstorm Warning	FWD	Dallas	54 min
Apr 8, 11:40 PM CDT	Special Weather Statement	FWD	Palo Pinto	35 min
Apr 8, 11:41 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	64 min
Apr 8, 11:45 PM CDT	Special Weather Statement	FWD	Coryell	30 min
Apr 8, 11:46 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto	59 min
Apr 8, 11:50 PM CDT	Severe Thunderstorm Warning	FWD	Fannin, Hunt	33 min
Apr 8, 11:54 PM CDT	Severe Thunderstorm Warning	FWD	Collin	49 min
Apr 8, 11:59 PM CDT	Special Weather Statement	FWD	Coryell	31 min
Apr 9, 12:07 AM CDT	Special Weather Statement	FWD	Tarrant	23 min
Apr 9, 12:18 AM CDT	Severe Thunderstorm Warning	FWD	Parker	57 min
Apr 9, 12:20 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	55 min
Apr 9, 12:26 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas	47 min
Apr 9, 12:34 AM CDT	Severe Thunderstorm Warning	FWD	Hunt	33 min
Apr 9, 1:05 AM CDT	Severe Thunderstorm Warning	FWD	Denton	55 min
Apr 9, 1:14 AM CDT	Severe Thunderstorm Warning	FWD	Parker	46 min
Apr 9, 1:30 AM CDT	Special Weather Statement	FWD	Hunt	30 min
Apr 9, 1:32 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	58 min
Apr 9, 1:53 AM CDT	Severe Thunderstorm Warning	FWD	Parker	7 min
Apr 9, 1:55 AM CDT	Severe Thunderstorm Warning	FWD	Johnson	65 min
Apr 9, 2:02 AM CDT	Severe Thunderstorm Warning	FWD	Denton	15 min
Apr 9, 2:29 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	32 min
Apr 9, 3:15 AM CDT	Special Weather Statement	FWD	Ellis	30 min
Apr 9, 4:00 AM CDT	Flash Flood Watch	FWD	Collin, Cooke, Dallas, Delta, Denton, Eastland and 14 more	28 hr
Apr 9, 4:07 AM CDT	Special Weather Statement	FWD	Dallas	23 min
Apr 9, 5:18 AM CDT	River Flood Warning	FWD	Delta, Hopkins	15 hr
Apr 9, 7:59 AM CDT	River Flood Warning	FWD	Dallas	12 hr
Apr 9, 8:25 AM CDT	River Flood Warning	FWD	Hunt	25 hr
Apr 9, 8:25 AM CDT	River Flood Warning	FWD	Hunt, Rockwall	58 hr
Apr 9, 3:20 PM CDT	Special Weather Statement	FWD	Cooke	25 min
Apr 9, 4:09 PM CDT	Special Weather Statement	FWD	Stephens	36 min
Apr 9, 4:39 PM CDT	Special Weather Statement	FWD	Stephens	21 min
Apr 9, 4:47 PM CDT	Tornado Warning Emergency	FWD	Stephens	43 min
Apr 9, 5:13 PM CDT	Special Weather Statement	FWD	Palo Pinto	32 min
Apr 9, 5:29 PM CDT	Tornado Warning	FWD	Palo Pinto, Stephens	46 min
Apr 9, 6:00 PM CDT	Special Weather Statement	FWD	Young	30 min
Apr 9, 6:13 PM CDT	Tornado Warning	FWD	Palo Pinto	47 min
Apr 9, 6:19 PM CDT	Severe Thunderstorm Warning	FWD	Jack	41 min
Apr 9, 6:27 PM CDT	Special Weather Statement	FWD	Grayson	33 min
Apr 9, 6:32 PM CDT	Severe Thunderstorm Warning	FWD	Grayson	43 min
Apr 9, 6:46 PM CDT	Tornado Warning	FWD	Jack, Palo Pinto, Parker, Wise	29 min
Apr 9, 6:47 PM CDT	Special Weather Statement	FWD	Lamar	18 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.