Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 271, NWS Fort Worth, TX

November 21, 2013Parker County, Tarrant County, Wise County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Nov 21, 2013, 6:13 PM CST for Parker County, Tarrant County, Wise County, Texas. It was in force for 47 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: Nov 21, 2013, 6:13 PM CST (00:13 UTC)
Expired: Nov 21, 2013, 7:00 PM CST
In force: 47 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Parker County, TX, Tarrant County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 47 km from the middle of the area, began a volume at 00:14 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 00:00Z, 0.2 hours before the alert went out and 29 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: 1508 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 731 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.2

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 Nov 21, 6:02 PM CST, 11 minutes earlier.

Area forecast discussion, Nov 21, 6:02 PM CST, 11 minutes before

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Hazardous weather outlook, Nov 21, 3:31 PM CST, 2 hours 42 minutes before

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In the hours before

Special weather statement, Nov 21, 1:35 PM CST, 4 hours 38 minutes before

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Special weather statement, Nov 21, 2:17 PM CST, 3 hours 56 minutes before

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Special weather statement, Nov 21, 3:30 PM CST, 2 hours 43 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
Nov 21, 6:40 PM CST	Severe Thunderstorm Warning	FWD	Parker	65 min
Nov 21, 7:25 PM CST	Areal Flood Advisory	FWD	Tarrant	3 hr
Nov 21, 8:11 PM CST	Areal Flood Advisory	FWD	Fannin, Grayson	3 hr
Nov 21, 8:28 PM CST	Areal Flood Advisory	FWD	Dallas	3 hr
Nov 21, 11:07 PM CST	Areal Flood Advisory	FWD	Henderson, Kaufman, Navarro, Van Zandt	83 min
Nov 22, 3:52 AM CST	Winter Storm Watch	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 37 more	35 hr
Nov 22, 11:29 AM CST	Winter Weather Advisory	FWD	Comanche, Cooke, Eastland, Erath, Hamilton, Hood and 9 more	23 hr

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.