Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 69, NWS Fort Worth, TX

March 30, 2009Hill County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 30, 2009, 11:52 PM CDT for Hill County, Texas. It was in force for 53 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: Mar 30, 2009, 11:52 PM CDT (04:52 UTC)
Expired: Mar 31, 2009, 12:45 AM CDT
In force: 53 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Hill County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 67 km from the middle of the area, began a volume at 04:54 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, 4.9 hours before the alert went out and 95 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: 650 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 415 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 12.5

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 Mar 30, 11:22 PM CDT, 30 minutes earlier.

Area forecast discussion, Mar 30, 11:22 PM CDT, 30 minutes before

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Hazardous weather outlook, Mar 30, 7:12 PM CDT, 4 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
712 PM CDT MON MAR 30 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-311200-
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-
712 PM CDT MON MAR 30 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.
ISOLATED SEVERE THUNDERSTORMS WITH LARGE HAIL AND LOCALIZED DAMAGING
WINDS TO 60 MPH WILL BE POSSIBLE NORTH OF INTERSTATE 20 TONIGHT.
SCATTERED THUNDERSTORMS WILL DEVELOP ALONG A COLD FRONT MOVING
INTO THE RED RIVER LATE THIS EVENING. STORMS WILL FORM A SQUALL
LINE DOWN THE FRONTAL BOUNDARY OVERNIGHT...WITH BEST CHANCES ALONG
AND EAST OF INTERSTATE 35.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
THUNDERSTORM CHANCES WILL CONTINUE SOUTHEAST OF A LINE FROM TEMPLE
TO SULPHUR SPRINGS THROUGH NOON TUESDAY. ISOLATED SEVERE STORMS MAY
OCCUR.

A CHANCE OF THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY...
AND AGAIN ON SATURDAY WITH A FEW SEVERE STORMS ARE POSSIBLE WITH EACH
EVENT. VERY STRONG AND GUSTY NORTHWEST WINDS ARE EXPECTED ON THURSDAY
BEHIND A COLD FRONT.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED NORTH OF INTERSTATE 20 LATER TONIGHT.

05/

In the hours before

Local storm report, Mar 30, 11:02 PM CDT, 50 minutes before

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Local storm report, Mar 30, 11:03 PM CDT, 49 minutes before

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Local storm report, Mar 30, 11:06 PM CDT, 46 minutes before

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Local storm report, Mar 30, 11:13 PM CDT, 39 minutes before

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Local storm report, Mar 30, 11:23 PM CDT, 29 minutes before

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Local storm report, Mar 30, 11:37 PM CDT, 15 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
Mar 30, 8:38 PM CDT	Special Weather Statement	FWD	Montague	37 min
Mar 30, 8:52 PM CDT	Severe Thunderstorm Warning	FWD	Montague	38 min
Mar 30, 9:02 PM CDT	Special Weather Statement	FWD	Jack	18 min
Mar 30, 9:23 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Wise	52 min
Mar 30, 9:31 PM CDT	Severe Thunderstorm Warning	FWD	Parker	59 min
Mar 30, 9:33 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	57 min
Mar 30, 10:09 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Tarrant, Wise	66 min
Mar 30, 10:26 PM CDT	Severe Thunderstorm Warning	FWD	Parker, Tarrant	64 min
Mar 30, 10:29 PM CDT	Severe Thunderstorm Warning	FWD	Cooke	46 min
Mar 30, 10:49 PM CDT	Severe Thunderstorm Warning	FWD	Dallas	56 min
Mar 30, 10:55 PM CDT	Special Weather Statement	FWD	Hood, Johnson, Somervell	65 min
Mar 30, 11:00 PM CDT	Special Weather Statement	FWD	Bosque	90 min
Mar 30, 11:15 PM CDT	Severe Thunderstorm Warning	FWD	Johnson, Somervell	60 min
Mar 30, 11:25 PM CDT	Severe Thunderstorm Warning	FWD	Ellis	65 min
Mar 30, 11:41 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Rockwall	50 min
Mar 31, 12:06 AM CDT	Severe Thunderstorm Warning	FWD	Kaufman	54 min
Mar 31, 12:26 AM CDT	Special Weather Statement	FWD	Bosque	34 min
Mar 31, 12:27 AM CDT	Special Weather Statement	FWD	Hunt	33 min
Mar 31, 12:28 AM CDT	Severe Thunderstorm Warning	FWD	Ellis	62 min
Mar 31, 12:52 AM CDT	Special Weather Statement	FWD	Hill	23 min
Mar 31, 12:54 AM CDT	Special Weather Statement	FWD	Navarro	36 min
Mar 31, 1:15 AM CDT	Special Weather Statement	FWD	Henderson	30 min
Mar 31, 1:26 AM CDT	Special Weather Statement	FWD	Navarro	34 min
Mar 31, 1:47 AM CDT	Special Weather Statement	FWD	Van Zandt	28 min
Mar 31, 2:12 AM CDT	Special Weather Statement	FWD	Henderson	33 min
Mar 31, 5:21 AM CDT	Special Weather Statement	FWD	Robertson	24 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm warning in 2009

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.