Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 2, NWS Lubbock, TX

April 20, 20104 counties in Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Apr 20, 2010, 9:04 PM CDT for 4 counties in Texas. It was in force for 41 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, 2010, 9:04 PM CDT (02:04 UTC)
Expired: Apr 20, 2010, 9:45 PM CDT
In force: 41 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon

Counties Castro County, TX, Hale County, TX, Lamb County, TX, Swisher County, TX

The radar

The Lubbock radar (KLBB), 75 km from the middle of the area, began a volume at 02:05 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.1 hours before the alert went out and 108 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: 972 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 884 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 328 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.5

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 Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 6:27 PM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Apr 20, 6:27 PM CDT, 2 hours 37 minutes before

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Hazardous weather outlook, Apr 20, 11:45 AM CDT, 9 hours 19 minutes before

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In the hours before

Special weather statement, Apr 20, 6:44 PM CDT, 2 hours 20 minutes before

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Special weather statement, Apr 20, 7:25 PM CDT, 1 hour 39 minutes before

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Special weather statement, Apr 20, 7:58 PM CDT, 1 hour 6 minutes before

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Special weather statement, Apr 20, 8:54 PM CDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 8:32 PM CDT	Severe Thunderstorm Warning	LUB	Castro, Swisher	43 min
Apr 21, 5:15 PM CDT	Severe Thunderstorm Warning	LUB	Hale	45 min
Apr 21, 5:59 PM CDT	Severe Thunderstorm Warning	LUB	Floyd, Hale	46 min
Apr 21, 6:07 PM CDT	Severe Thunderstorm Warning	LUB	Floyd, Motley	23 min
Apr 21, 6:30 PM CDT	Severe Thunderstorm Warning	LUB	Floyd, Motley	45 min
Apr 21, 6:50 PM CDT	Severe Thunderstorm Warning	LUB	Dickens, Kent	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010 Every severe thunderstorm warning in 2010

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.