Alert archive / Texas / Special Weather Statements in 2013

Special Weather Statement, NWS Austin/San Antonio, TX

February 11, 2013Karnes County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Feb 11, 2013, 4:21 AM CST for Karnes County, Texas. It was in force for 54 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: Feb 11, 2013, 4:21 AM CST (10:21 UTC)
Expired: Feb 11, 2013, 5:15 AM CST
In force: 54 min
Issued by: NWS Austin/San Antonio, TX

County Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 107 km from the middle of the area, began a volume at 10:22 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

Corpus Christi, TX (KCRP), launched 00:00Z, 10.4 hours before the alert went out and 124 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: 19 J/kg
Mixed-layer CIN: -635 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this special weather statement went out at Feb 10, 5:31 PM CST, 10 hours 50 minutes earlier.

Area forecast discussion, Feb 10, 5:31 PM CST, 10 hours 50 minutes before

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Hazardous weather outlook, Feb 10, 7:34 AM CST, 20 hours 47 minutes before

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The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 11, 1:53 AM CST	Special Weather Statement	EWX	Atascosa	67 min
Feb 11, 3:14 PM CST	Red Flag Warning	EWX	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 6 more	28 hr

Nearby

Special Weather Statements in Texas, 2013 Every special weather statement in 2013

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.