Alert archive / Texas / Winter Storm Warnings in 2007

Winter Storm Warning 4, NWS San Angelo, TX

April 7, 200719 counties in Texas

NWS San Angelo, TX issued this winter storm warning at Apr 7, 2007, 12:10 PM CDT for 19 counties in Texas. It was in force for 12 hr. 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 7, 2007, 12:10 PM CDT (17:10 UTC)
Expired: Apr 8, 2007, 12:00 AM CDT
In force: 12 hr
Issued by: NWS San Angelo, TX

Counties Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Irion County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 45 km from the middle of the area, began a volume at 17:13 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

Del Rio, TX (KDRT), launched 12:00Z, 5.2 hours before the alert went out and 239 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: 608 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 483 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at Apr 7, 7:48 AM CDT, 4 hours 22 minutes earlier.

Area forecast discussion, Apr 7, 7:48 AM CDT, 4 hours 22 minutes before

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Hazardous weather outlook, Apr 7, 5:31 AM CDT, 6 hours 39 minutes before

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In the hours before

Local storm report, Apr 7, 11:50 AM CDT, 20 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 7, 8:11 AM CDT	Winter Weather Advisory	SJT	Brown, Callahan, Coke, Coleman, Concho, Crockett and 18 more	13 hr

Nearby

Winter Storm Warnings in Texas, 2007 Every winter storm 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.