Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 311, NWS Fort Worth, TX

June 21, 2004Stephens County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 21, 2004, 6:52 PM CDT for Stephens 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: Jun 21, 2004, 6:52 PM CDT (23:52 UTC)
Expired: Jun 21, 2004, 7:45 PM CDT
In force: 53 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Stephens County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.9 hours before the alert went out and 145 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: 1714 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1017 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Jun 21, 6:25 PM CDT, 27 minutes earlier.

Area forecast discussion, Jun 21, 6:25 PM CDT, 27 minutes before

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Hazardous weather outlook, Jun 21, 3:55 PM CDT, 2 hours 57 minutes before

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In the hours before

Local storm report, Jun 21, 2:22 PM CDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
222 PM CDT MON JUN 21 2004

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

0214 PM     TSTM WND DMG    SUMNER                   33.74N  95.67W
06/21/2004                  LAMAR               TX   LAW ENFORCEMENT

            POWER LINES DOWN NEAR SUMNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:20 PM CDT	Severe Thunderstorm Warning	FWD	Lamar	55 min
Jun 21, 2:47 PM CDT	Severe Thunderstorm Warning	FWD	Collin	58 min
Jun 21, 3:08 PM CDT	Severe Thunderstorm Warning	FWD	Wise	67 min
Jun 21, 3:32 PM CDT	Severe Thunderstorm Warning	FWD	Jack	43 min
Jun 21, 3:51 PM CDT	Flash Flood Warning	FWD	Collin	3 hr
Jun 21, 5:25 PM CDT	Severe Thunderstorm Warning	FWD	Young	65 min

Nearby

Severe Thunderstorm Warnings in Texas, 2004 Every severe thunderstorm warning in 2004

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.