Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 59, NWS Austin/San Antonio, TX

May 15, 2010Burnet County, Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 15, 2010, 6:43 PM CDT for Burnet County, Llano County, Texas. It was in force for 20 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: May 15, 2010, 6:43 PM CDT (23:43 UTC)
Expired: May 15, 2010, 7:03 PM CDT
In force: 20 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Burnet County, TX, Llano County, TX

The radar

The Ft Hood radar (KGRK), 100 km from the middle of the area, began a volume at 23:43 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, 11.7 hours before the alert went out and 278 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: 584 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.7

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 15, 3:15 PM CDT, 3 hours 28 minutes earlier.

Area forecast discussion, May 15, 3:15 PM CDT, 3 hours 28 minutes before

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Hazardous weather outlook, May 15, 5:48 PM CDT, 55 minutes before

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In the hours before

Local storm report, May 15, 1:26 PM CDT, 5 hours 17 minutes before

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Special weather statement, May 15, 6:02 PM CDT, 41 minutes before

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Local storm report, May 15, 6:33 PM CDT, 10 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
May 14, 9:36 PM CDT	River Flood Warning	EWX	Frio	3 days
May 14, 11:22 PM CDT	River Flood Warning	EWX	Bexar	3 hr
May 15, 12:15 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	45 min
May 15, 1:09 AM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bexar, Blanco, Comal, Frio and 10 more	5 hr
May 15, 1:43 AM CDT	Areal Flood Advisory	EWX	Bandera, Bastrop, Bexar, Blanco, Caldwell, Comal and 10 more	107 min
May 15, 1:54 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	51 min
May 15, 2:22 AM CDT	Flash Flood Warning	EWX	Bastrop, Bexar, Caldwell, Comal, Guadalupe, Hays and 1 more	3 hr
May 15, 3:20 AM CDT	Flash Flood Warning	EWX	Bandera, Frio, Medina	3 hr
May 15, 3:30 AM CDT	Flash Flood Warning	EWX	Atascosa, Fayette, Gonzales, Wilson	3 hr
May 15, 4:55 AM CDT	Areal Flood Advisory	EWX	DeWitt, Karnes, Lavaca	2 hr
May 15, 9:48 AM CDT	River Flood Warning	EWX	Bexar	24 hr
May 15, 6:06 PM CDT	Severe Thunderstorm Warning	EWX	Llano	39 min
May 15, 6:20 PM CDT	Tornado Warning	EWX	Llano	25 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.