Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 79, NWS San Angelo, TX

April 13, 2007Brown County, San Saba County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 13, 2007, 5:36 PM CDT for Brown County, San Saba County, Texas. It was in force for 39 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 13, 2007, 5:36 PM CDT (22:36 UTC)
Expired: Apr 13, 2007, 6:15 PM CDT
In force: 39 min
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

Counties Brown County, TX, San Saba County, TX

The radar

The Dyess AFB radar (KDYX), 124 km from the middle of the area, began a volume at 22:39 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 13, 12:27 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.6 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1166 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 453 m²/s²
0-3 km storm-relative helicity: 570 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

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 13, 3:34 PM CDT, 2 hours 2 minutes earlier.

Area forecast discussion, Apr 13, 3:34 PM CDT, 2 hours 2 minutes before

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Hazardous weather outlook, Apr 13, 2:47 PM CDT, 2 hours 49 minutes before

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In the hours before

Special weather statement, Apr 13, 2:49 PM CDT, 2 hours 47 minutes before

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Local storm report, Apr 13, 3:03 PM CDT, 2 hours 33 minutes before

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Special weather statement, Apr 13, 3:41 PM CDT, 1 hour 55 minutes before

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Special weather statement, Apr 13, 4:10 PM CDT, 1 hour 26 minutes before

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Special weather statement, Apr 13, 4:10 PM CDT, 1 hour 26 minutes before

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Special weather statement, Apr 13, 5:20 PM CDT, 16 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 13, 3:16 AM CDT	Lake Wind Advisory	SJT	Coke, Concho, Nolan, Runnels, Taylor, Tom Green	17 hr
Apr 13, 3:18 AM CDT	Red Flag Warning	SJT	Coke, Crockett, Fisher, Irion, Nolan, Sterling and 1 more	17 hr
Apr 13, 1:13 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	32 min
Apr 13, 1:28 PM CDT	Tornado Warning	SJT	Haskell	32 min
Apr 13, 1:51 PM CDT	Tornado Warning	SJT	Haskell	24 min
Apr 13, 3:33 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	17 min
Apr 13, 5:26 PM CDT	Severe Thunderstorm Warning	SJT	Brown	34 min
Apr 13, 6:35 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	25 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.