Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 313, NWS Fort Worth, TX

June 20, 2007Hood County, Somervell County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 20, 2007, 3:44 AM CDT for Hood County, Somervell County, Texas. It was in force for 61 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, 3:44 AM CDT (08:44 UTC)
Expired
Jun 20, 2007, 4:45 AM CDT
In force
61 min
Issued by
NWS Fort Worth, TX
Area
Counties, with a storm outline in the text

Counties Hood County, TX, Somervell County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 54 km from the middle of the area, began a volume at 08:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 20, 1:10 AM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 8.7 hours before the alert went out and 74 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-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2007-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3576 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2007-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
3576 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
27 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, 3:35 AM CDT, 9 minutes earlier.

Area forecast discussion, Jun 20, 3:35 AM CDT, 9 minutes before
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Hazardous weather outlook, Jun 19, 11:04 PM CDT, 4 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
1104 PM CDT TUE JUN 19 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-201000-
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-
1104 PM CDT TUE JUN 19 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
A FLASH FLOOD WATCH IS IN EFFECT FOR COOKE...GRAYSON...WISE AND
DENTON COUNTIES THROUGH NOON WEDNESDAY. A LINE OF STRONG THUNDERSTORM
IN OKLAHOMA WILL MOVE ACROSS THE RED RIVER BEFORE DAYBREAK. THE MAIN
THREATS WILL BE LOCALIZED FLOODING...DAMAGING WIND AND CLOUD TO
GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...
SCATTERED THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY OVER ALL OF NORTH
TEXAS. THE MAIN THREAT WITH THESE STORMS WILL BE LOCALIZED FLOODING
AND CLOUD TO GROUND LIGHTNING.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED AFTER 2 AM.

In the hours before

Local storm report, Jun 20, 3:21 AM CDT, 23 minutes before
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Special weather statement, Jun 20, 3:35 AM CDT, 9 minutes before
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Local storm report, Jun 20, 3:44 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 11:34 PM CDTFlash Flood WatchFWDCollin, Cooke, Dallas, Denton, Eastland, Ellis and 14 more9 hr
Jun 20, 2:13 AM CDTSevere Thunderstorm WarningFWDYoung62 min
Jun 20, 2:31 AM CDTSevere Thunderstorm WarningFWDJack, Palo Pinto, Stephens59 min
Jun 20, 2:50 AM CDTSevere Thunderstorm WarningFWDMontague55 min
Jun 20, 2:59 AM CDTSevere Thunderstorm WarningFWDWise61 min
Jun 20, 3:19 AM CDTSevere Thunderstorm WarningFWDParker56 min
Jun 20, 3:28 AM CDTSevere Thunderstorm WarningFWDComanche, Eastland, Erath62 min
Jun 20, 3:35 AM CDTSpecial Weather StatementFWDDenton, Hill, Johnson, Tarrant25 min
Jun 20, 4:11 AM CDTSevere Thunderstorm WarningFWDCooke64 min
Jun 20, 4:19 AM CDTSpecial Weather StatementFWDTarrant26 min
Jun 20, 4:58 AM CDTSevere Thunderstorm WarningFWDTarrant27 min
Jun 20, 5:16 AM CDTSpecial Weather StatementFWDGrayson29 min
Jun 20, 5:22 AM CDTFlash Flood WarningFWDGrayson3 hr
Jun 20, 5:47 AM CDTSpecial Weather StatementFWDFannin28 min
Jun 20, 6:01 AM CDTSevere Thunderstorm WarningFWDCollin43 min
Jun 20, 6:10 AM CDTFlash Flood WarningFWDFannin3 hr
Jun 20, 6:38 AM CDTSpecial Weather StatementFWDDelta, Fannin, Hopkins, Lamar37 min
Jun 20, 6:55 AM CDTSpecial Weather StatementFWDDelta35 min
Jun 20, 9:58 AM CDTSpecial Weather StatementFWDFreestone32 min
Jun 20, 10:27 AM CDTSpecial Weather StatementFWDAnderson33 min
Jun 20, 1:09 PM CDTSpecial Weather StatementFWDHunt36 min
Jun 20, 1:39 PM CDTSpecial Weather StatementFWDHunt, Rockwall36 min
Jun 20, 2:13 PM CDTFlash Flood WarningFWDHunt, Rockwall3 hr
Jun 20, 2:27 PM CDTSpecial Weather StatementFWDFannin33 min
Jun 20, 2:40 PM CDTSpecial Weather StatementFWDHunt35 min
Jun 20, 2:44 PM CDTSevere Thunderstorm WarningFWDHunt25 min
Jun 20, 2:59 PM CDTSpecial Weather StatementFWDHopkins31 min
Jun 20, 3:07 PM CDTFlash Flood WatchFWDCollin, Cooke, Dallas, Delta, Denton, Fannin and 7 more30 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2007Every 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.