Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 73, NWS Fort Worth, TX

March 31, 2013Henderson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 31, 2013, 9:40 AM CDT for Henderson County, Texas. It was in force for 80 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 31, 2013, 9:40 AM CDT (14:40 UTC)
Expired: Mar 31, 2013, 11:00 AM CDT
In force: 80 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Henderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 142 km from the middle of the area, began a volume at 14:43 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.

Issued	Product	Office	Lasted
Mar 31, 5:10 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 2.7 hours before the alert went out and 151 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: 1833 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 878 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 335 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.3

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 31, 7:15 AM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Mar 31, 7:15 AM CDT, 2 hours 25 minutes before

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Hazardous weather outlook, Mar 31, 4:00 AM CDT, 5 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
400 AM CDT SUN MAR 31 2013

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-011100-
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-
400 AM CDT SUN MAR 31 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A COMPLEX OF THUNDERSTORMS WILL MOVE SOUTH THROUGH NORTH AND
CENTRAL TEXAS TODAY. SOME OF THE STORMS MAY BECOME SEVERE. LARGE
HAIL AND DAMAGING WINDS WILL BE THE PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THUNDERSTORM CHANCES WILL QUICKLY RETURN MONDAY EVENING AND
CONTINUE THROUGH TUESDAY AND TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS LIKELY TODAY...MAINLY ALONG AND NORTH OF THE
I-20 CORRIDOR THROUGH MIDDAY...AND SOUTH OF I-20 THIS AFTERNOON.

25

In the hours before

Local storm report, Mar 31, 7:49 AM CDT, 1 hour 51 minutes before

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Local storm report, Mar 31, 7:52 AM CDT, 1 hour 48 minutes before

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Local storm report, Mar 31, 8:02 AM CDT, 1 hour 38 minutes before

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Local storm report, Mar 31, 8:49 AM CDT, 51 minutes before

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Local storm report, Mar 31, 9:05 AM CDT, 35 minutes before

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Special weather statement, Mar 31, 9:18 AM CDT, 22 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, 7:03 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	42 min
Mar 30, 7:44 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	46 min
Mar 30, 7:57 PM CDT	Severe Thunderstorm Warning	FWD	Mills	63 min
Mar 31, 6:43 AM CDT	Special Weather Statement	FWD	Cooke, Grayson	32 min
Mar 31, 6:48 AM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	42 min
Mar 31, 7:09 AM CDT	Severe Thunderstorm Warning	FWD	Fannin	66 min
Mar 31, 7:13 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton	62 min
Mar 31, 7:29 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	31 min
Mar 31, 7:34 AM CDT	Severe Thunderstorm Warning	FWD	Lamar	56 min
Mar 31, 7:53 AM CDT	Severe Thunderstorm Warning	FWD	Hunt	67 min
Mar 31, 8:08 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Rockwall	67 min
Mar 31, 8:16 AM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins	59 min
Mar 31, 8:28 AM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman	62 min
Mar 31, 8:44 AM CDT	Severe Thunderstorm Warning	FWD	Rains, Van Zandt	61 min
Mar 31, 9:18 AM CDT	Special Weather Statement	FWD	Henderson	27 min
Mar 31, 10:27 AM CDT	Special Weather Statement	FWD	Anderson	33 min
Mar 31, 11:01 AM CDT	Special Weather Statement	FWD	Anderson	29 min

Nearby

Severe Thunderstorm Warnings in Texas, 2013 Every severe thunderstorm warning in 2013

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.