Alert archive / Texas / Special Weather Statements in 2011

Special Weather Statement, NWS San Angelo, TX

November 21, 2011San Saba County, Texas

NWS San Angelo, TX issued this special weather statement at Nov 21, 2011, 11:49 PM CST for San Saba County, 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 outline as issued.

The facts

Issued: Nov 21, 2011, 11:49 PM CST (05:49 UTC)
Expired: Nov 22, 2011, 12:30 AM CST
In force: 41 min
Issued by: NWS San Angelo, TX

County San Saba County, TX

The radar

The San Angelo radar (KSJT), 145 km from the middle of the area, began a volume at 05:52 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

Fort Worth, TX (KFWD), launched 00:00Z, 5.8 hours before the alert went out and 249 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 391 m above ground
0-6 km bulk shear: 94 kt
0-1 km storm-relative helicity: 514 m²/s²
0-3 km storm-relative helicity: 719 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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
Nov 21, 6:46 PM CST	Dense Fog Advisory	SJT	Brown, Callahan, Coke, Coleman, Fisher, Haskell and 7 more	5 hr
Nov 21, 10:19 PM CST	Special Weather Statement	SJT	Brown	41 min
Nov 22, 12:27 AM CST	Special Weather Statement	SJT	Mason	48 min

Nearby

Special Weather Statements in Texas, 2011 Every special weather statement in 2011

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.