Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 20, NWS Lubbock, TX

April 23, 2008Castro County, Parmer County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Apr 23, 2008, 4:46 PM CDT for Castro County, Parmer County, Texas. It was in force for 29 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 23, 2008, 4:46 PM CDT (21:46 UTC)
Expired: Apr 23, 2008, 5:15 PM CDT
In force: 29 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon

Counties Castro County, TX, Parmer County, TX

The radar

The Cannon AFB radar (KFDX), 101 km from the middle of the area, began a volume at 21:47 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 23, 3:52 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.8 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: 1133 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 7.4

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 23, 4:13 PM CDT, 33 minutes earlier.

Area forecast discussion, Apr 23, 4:13 PM CDT, 33 minutes before

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In the hours before

Special weather statement, Apr 23, 2:39 PM CDT, 2 hours 7 minutes before

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Special weather statement, Apr 23, 3:27 PM CDT, 1 hour 19 minutes before

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Special weather statement, Apr 23, 3:41 PM CDT, 1 hour 5 minutes before

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Special weather statement, Apr 23, 4:11 PM CDT, 35 minutes before

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Local storm report, Apr 23, 4:24 PM CDT, 22 minutes before

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Special weather statement, Apr 23, 4:46 PM CDT, 0 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 23, 10:11 AM CDT	Severe Thunderstorm Warning	LUB	Lamb	34 min
Apr 23, 10:37 AM CDT	Severe Thunderstorm Warning	LUB	Hockley, Lamb	38 min
Apr 23, 11:16 AM CDT	Severe Thunderstorm Warning	LUB	Hockley, Lamb	29 min
Apr 23, 12:25 PM CDT	Severe Thunderstorm Warning	LUB	Briscoe, Hall	40 min
Apr 23, 3:06 PM CDT	Severe Thunderstorm Warning	LUB	Stonewall	39 min
Apr 23, 3:45 PM CDT	Severe Thunderstorm Warning	LUB	Parmer	30 min
Apr 23, 4:16 PM CDT	Severe Thunderstorm Warning	LUB	Parmer	29 min
Apr 23, 5:16 PM CDT	Severe Thunderstorm Warning	LUB	Castro, Swisher	26 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.