Alert archive / Texas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 257, NWS Austin/San Antonio, TX

May 27, 2006Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 27, 2006, 7:44 PM CDT for Val Verde County, Texas. It was in force for 31 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 27, 2006, 7:44 PM CDT (00:44 UTC)
Expired: May 27, 2006, 8:15 PM CDT
In force: 31 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 00:48 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 00:00Z, 0.7 hours before the alert went out and 66 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: 3938 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1705 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.6

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 27, 3:17 PM CDT, 4 hours 27 minutes earlier.

Area forecast discussion, May 27, 3:17 PM CDT, 4 hours 27 minutes before

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Hazardous weather outlook, May 27, 6:14 AM CDT, 13 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
614 AM CDT SAT MAY 27 2006

TXZ171>173-183>194-202>209-217>225-228-281115-
LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA-
GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE-
MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA-
FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT-
614 AM CDT SAT MAY 27 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS MEXICO AND
WEST TEXAS AND SOME COULD MOVE EAST INTO VAL VERDE...KINNEY AND
MAVERICK COUNTIES DURING THE EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
ISOLATED SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVERTHEH RIO GRANDE
PLAINS THROUGH MONDAY. DURING NEXT WEEK...THERE IS A SLIGHT CHANCE
FOR SHOWERS AND THUNDERSTORMS OVER MUCH OF THE AREA. SLIGHTLY
BETTER CHANCES ARE EXPECTED OVER THE EASTERN COUNTIES AND THE
COASTAL PLAIN.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 4:33 AM CDT	Severe Thunderstorm Warning	EWX	Zavala	57 min

Nearby

Severe Thunderstorm Warnings in Texas, 2006 Every severe thunderstorm warning in 2006

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.