Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 317, NWS Fort Worth, TX

June 20, 2007Hunt County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 20, 2007, 2:44 PM CDT for Hunt County, Texas. It was in force for 25 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 20, 2007, 2:44 PM CDT (19:44 UTC)
Expired: Jun 20, 2007, 3:09 PM CDT
In force: 25 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Hunt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 129 km from the middle of the area, began a volume at 19:47 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 12:00Z, 7.7 hours before the alert went out and 117 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: 2 J/kg
Mixed-layer CIN: -501 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -96 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 20, 1:40 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jun 20, 1:40 PM CDT, 1 hour 4 minutes before

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Hazardous weather outlook, Jun 20, 1:30 PM CDT, 1 hour 14 minutes before

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In the hours before

Local storm report, Jun 20, 12:22 PM CDT, 2 hours 22 minutes before

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Local storm report, Jun 20, 12:26 PM CDT, 2 hours 18 minutes before

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Special weather statement, Jun 20, 1:09 PM CDT, 1 hour 35 minutes before

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Special weather statement, Jun 20, 1:39 PM CDT, 1 hour 5 minutes before

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Special weather statement, Jun 20, 2:27 PM CDT, 17 minutes before

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Special weather statement, Jun 20, 2:40 PM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
240 PM CDT WED JUN 20 2007

TXZ105-202015-
HUNT TX-
240 PM CDT WED JUN 20 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN HUNT COUNTY

AT 240 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES NORTH OF GREENVILLE...MOVING NORTHEAST AT
40 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE WOLFE CITY.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THIS STORM.

HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT.

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

LAT...LON 3319 9622 3313 9609 3327 9585 3341 9584
      3339 9606

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 11:34 PM CDT	Flash Flood Watch	FWD	Collin, Cooke, Dallas, Denton, Eastland, Ellis and 14 more	9 hr
Jun 20, 2:13 AM CDT	Severe Thunderstorm Warning	FWD	Young	62 min
Jun 20, 2:31 AM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Stephens	59 min
Jun 20, 2:50 AM CDT	Severe Thunderstorm Warning	FWD	Montague	55 min
Jun 20, 2:59 AM CDT	Severe Thunderstorm Warning	FWD	Wise	61 min
Jun 20, 3:19 AM CDT	Severe Thunderstorm Warning	FWD	Parker	56 min
Jun 20, 3:28 AM CDT	Severe Thunderstorm Warning	FWD	Comanche, Eastland, Erath	62 min
Jun 20, 3:35 AM CDT	Special Weather Statement	FWD	Denton, Hill, Johnson, Tarrant	25 min
Jun 20, 3:44 AM CDT	Severe Thunderstorm Warning	FWD	Hood, Somervell	61 min
Jun 20, 4:11 AM CDT	Severe Thunderstorm Warning	FWD	Cooke	64 min
Jun 20, 4:19 AM CDT	Special Weather Statement	FWD	Tarrant	26 min
Jun 20, 4:58 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	27 min
Jun 20, 5:16 AM CDT	Special Weather Statement	FWD	Grayson	29 min
Jun 20, 5:22 AM CDT	Flash Flood Warning	FWD	Grayson	3 hr
Jun 20, 5:47 AM CDT	Special Weather Statement	FWD	Fannin	28 min
Jun 20, 6:01 AM CDT	Severe Thunderstorm Warning	FWD	Collin	43 min
Jun 20, 6:10 AM CDT	Flash Flood Warning	FWD	Fannin	3 hr
Jun 20, 6:38 AM CDT	Special Weather Statement	FWD	Delta, Fannin, Hopkins, Lamar	37 min
Jun 20, 6:55 AM CDT	Special Weather Statement	FWD	Delta	35 min
Jun 20, 9:58 AM CDT	Special Weather Statement	FWD	Freestone	32 min
Jun 20, 10:27 AM CDT	Special Weather Statement	FWD	Anderson	33 min
Jun 20, 1:09 PM CDT	Special Weather Statement	FWD	Hunt	36 min
Jun 20, 1:39 PM CDT	Special Weather Statement	FWD	Hunt, Rockwall	36 min
Jun 20, 2:13 PM CDT	Flash Flood Warning	FWD	Hunt, Rockwall	3 hr
Jun 20, 2:27 PM CDT	Special Weather Statement	FWD	Fannin	33 min
Jun 20, 2:40 PM CDT	Special Weather Statement	FWD	Hunt	35 min
Jun 20, 2:59 PM CDT	Special Weather Statement	FWD	Hopkins	31 min
Jun 20, 3:07 PM CDT	Flash Flood Watch	FWD	Collin, Cooke, Dallas, Delta, Denton, Fannin and 7 more	30 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.