Alert archive / Texas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 72, NWS Fort Worth, TX

April 20, 2006Lampasas County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 20, 2006, 5:23 PM CDT for Lampasas County, Texas. It was in force for 67 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 20, 2006, 5:23 PM CDT (22:23 UTC)
Expired: Apr 20, 2006, 6:30 PM CDT
In force: 67 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Lampasas County, TX

The radar

The Ft Hood radar (KGRK), 97 km from the middle of the area, began a volume at 22:23 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.

Issued	Product	Office	Lasted
Apr 20, 3:31 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.4 hours before the alert went out and 203 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2035 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 62 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 Apr 20, 3:40 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, Apr 20, 3:40 PM CDT, 1 hour 43 minutes before

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Hazardous weather outlook, Apr 20, 3:35 PM CDT, 1 hour 48 minutes before

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
335 PM CDT THU APR 20 2006

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211100-
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-
335 PM CDT THU APR 20 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT
SEVERE THUNDERSTORM WATCH 224 IS IN EFFECT THROUGH 10 PM CDT...
GENERALLY SOUTH OF A CISCO...GLEN ROSE...HILLSBORO...FAIRFIELD LINE.
THIS IS INCLUDES THE STEPHENVILLE...WACO...TEMPLE...KILLEEN...HEARNE
AND CENTERVILLE AREAS.

THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS WITH HEAVY RAINFALL
OVER ALL OF NORTH TEXAS TONIGHT. HOWEVER...THE GREATEST THREAT FOR
SEVERE WEATHER WITH DAMAGING WINDS...LARGE HAIL AND EVEN AN ISOLATED
TORNADO WILL BE THOSE AREAS GENERALLY SOUTHEAST OF A SULPHUR SPRINGS
...TERRELL...CORSICANA...TEMPLE LINE DUE TO A MORE UNSTABLE AIRMASS
EXISTING ACROSS THIS REGION.

FURTHERMORE...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF NORTH
TEXAS THROUGH 6 AM CST FRIDAY MORNING. THE THREAT FOR LOCALIZED FLASH
FLOODING WILL INCREASE TONIGHT AS A STRONG UPPER LEVEL SYSTEM MOVING
EAST FROM NEW MEXICO WILL COLLIDE WITH AMPLE GULF MOISTURE AND SOME
OLD OUTFLOW BOUNDARIES ACROSS NORTH TEXAS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
SHOWERS AND SCATTERED THUNDERSTORMS...SOME POSSIBLY SEVERE WITH
HEAVY RAINFALL...WILL LINGER ACROSS AREAS EAST OF INTERSTATE 35
THROUGH MID MORNING FRIDAY...AS A COLD FRONT AND UPPER LEVEL
DISTURBANCE MOVE EAST TOWARD THE LOWER MISSISSIPPI VALLEY.

ANOTHER CHANCE FOR THUNDERSTORMS WILL OCCUR MONDAY NIGHT AND
TUESDAY...AS A COLD FRONT MOVES INTO THE REGION. THE RISK FOR ANY
SEVERE WEATHER IS TOO EARLY TO ASSESS AT THIS TIME...DUE TO
UNCERTAINTIES REGARDING AVAILABLE MOISTURE...WIND SHEAR AND
INSTABILITY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE NEEDED THROUGH TONIGHT OVER THE
SOUTHEAST HALF OF NORTH TEXAS FOR BOTH SEVERE WEATHER AND POTENTIAL
FLASH FLOODING. SPOTTER ACTIVATION MAY BE NEEDED FURTHER TO THE
NORTHWEST...BUT DOESNT LOOK AS LIKELY.

05/

In the hours before

Special weather statement, Apr 20, 4:12 PM CDT, 1 hour 11 minutes before

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Special weather statement, Apr 20, 4:36 PM CDT, 47 minutes before

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Special weather statement, Apr 20, 4:39 PM CDT, 44 minutes before

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Special weather statement, Apr 20, 4:45 PM CDT, 38 minutes before

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Special weather statement, Apr 20, 5:03 PM CDT, 20 minutes before

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Special weather statement, Apr 20, 5:17 PM CDT, 6 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 19, 8:33 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto	52 min
Apr 19, 8:52 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone	51 min
Apr 19, 8:58 PM CDT	Severe Thunderstorm Warning	FWD	Henderson	29 min
Apr 19, 9:27 PM CDT	Flash Flood Warning	FWD	Anderson	3 hr
Apr 19, 9:58 PM CDT	Flash Flood Watch	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 40 more	31 hr
Apr 19, 10:16 PM CDT	Severe Thunderstorm Warning	FWD	Stephens	59 min
Apr 19, 10:30 PM CDT	Flash Flood Warning	FWD	Young	4 hr
Apr 19, 11:31 PM CDT	Severe Thunderstorm Warning	FWD	Wise	59 min
Apr 20, 12:33 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	57 min
Apr 20, 12:56 AM CDT	Severe Thunderstorm Warning	FWD	Dallas	64 min
Apr 20, 3:17 AM CDT	Severe Thunderstorm Warning	FWD	Henderson, Van Zandt	43 min
Apr 20, 6:00 PM CDT	Severe Thunderstorm Warning	FWD	Bell, Coryell	60 min
Apr 20, 6:55 PM CDT	Severe Thunderstorm Warning	FWD	Bell	65 min

Nearby

Severe Thunderstorm Warnings in Texas, 2006 Every severe thunderstorm warning in 2006

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.