Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 13, NWS San Angelo, TX

April 23, 2010Callahan County, Taylor County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 23, 2010, 1:35 AM CDT for Callahan County, Taylor County, Texas. It was in force for 40 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, 2010, 1:35 AM CDT (06:35 UTC)
Expired: Apr 23, 2010, 2:15 AM CDT
In force: 40 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon

Counties Callahan County, TX, Taylor County, TX

The radar

The Dyess AFB radar (KDYX), 44 km from the middle of the area, began a volume at 06:36 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 22, 9:32 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.6 hours before the alert went out and 227 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: 804 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 462 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 290 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.8

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 12:35 AM CDT, 1 hour earlier.

Area forecast discussion, Apr 23, 12:35 AM CDT, 1 hour before

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In the hours before

Special weather statement, Apr 22, 11:28 PM CDT, 2 hours 7 minutes before

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Special weather statement, Apr 22, 11:48 PM CDT, 1 hour 47 minutes before

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Special weather statement, Apr 23, 12:07 AM CDT, 1 hour 28 minutes before

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Special weather statement, Apr 23, 12:32 AM CDT, 1 hour 3 minutes before

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Special weather statement, Apr 23, 12:45 AM CDT, 50 minutes before

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Special weather statement, Apr 23, 1:26 AM CDT, 9 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 11:33 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	42 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.