Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 89, NWS San Angelo, TX

May 11, 2011Callahan County, Coleman County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 11, 2011, 11:32 AM CDT for Callahan County, Coleman County, Texas. It was in force for 43 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 11, 2011, 11:32 AM CDT (16:32 UTC)
Expired: May 11, 2011, 12:15 PM CDT
In force: 43 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon

Counties Callahan County, TX, Coleman County, TX

The radar

The Dyess AFB radar (KDYX), 58 km from the middle of the area, began a volume at 16:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 11, 10:21 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 4.5 hours before the alert went out and 218 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: 1949 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.8

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 11, 10:38 AM CDT, 54 minutes earlier.

Area forecast discussion, May 11, 10:38 AM CDT, 54 minutes before

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Hazardous weather outlook, May 11, 4:35 AM CDT, 6 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
435 AM CDT WED MAY 11 2011

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-120945-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
435 AM CDT WED MAY 11 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE TODAY AS AN UPPER
LEVEL TROUGH APPROACHES FROM THE WEST. THERE IS A SLIGHT RISK OF
SEVERE THUNDERSTORMS IN THE AFTERNOON...MAINLY EAST OF THE DRYLINE
EXTENDING FROM FROM THROCKMORTON TO BAIRD TO BRADY TO JUNCTION.
THE MAIN THREATS WILL BE LARGE HAIL...DAMAGING WINDS AND ISOLATED
TORNADOES.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY AFTERNOON
ALONG AND EAST OF A DRYLINE THAT WILL EXTEND FROM NEAR BROWNWOOD
TO JUNCTION. THE MAIN THREATS WILL BE LARGE HAIL AND DAMAGING
WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON INTO EARLY
EVENING.

In the hours before

Local storm report, May 11, 10:15 AM CDT, 1 hour 17 minutes before

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Special weather statement, May 11, 10:31 AM CDT, 1 hour 1 minute before

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Local storm report, May 11, 10:40 AM CDT, 52 minutes before

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Special weather statement, May 11, 10:42 AM CDT, 50 minutes before

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Special weather statement, May 11, 11:00 AM CDT, 32 minutes before

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Local storm report, May 11, 11:14 AM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1114 AM CDT WED MAY 11 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 AM     HAIL             WALL                    31.37N 100.31W
05/11/2011  E0.88 INCH       TOM GREEN          TX   PUBLIC

            PEA TO NICKEL SIZE HAIL WAS COVERING GROUND. RELAYED
            THROUGH KLST

&&

EVENT NUMBER SJT1100173

JOHNSON

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 8:59 AM CDT	Severe Thunderstorm Warning	SJT	Fisher, Nolan	46 min
May 11, 9:36 AM CDT	Severe Thunderstorm Warning	SJT	Coleman, Concho, Runnels, Tom Green	39 min
May 11, 9:51 AM CDT	Severe Thunderstorm Warning	SJT	Callahan, Coleman, Runnels, Taylor	39 min
May 11, 10:16 AM CDT	Areal Flood Advisory	SJT	Runnels	119 min
May 11, 10:17 AM CDT	Severe Thunderstorm Warning	SJT	Coleman, Runnels	43 min
May 11, 10:52 AM CDT	Areal Flood Advisory	SJT	Tom Green	113 min
May 11, 11:16 AM CDT	Areal Flood Advisory	SJT	Callahan, Coleman	119 min
May 11, 11:37 AM CDT	Areal Flood Advisory	SJT	Concho	113 min
May 11, 12:03 PM CDT	Areal Flood Advisory	SJT	Brown	117 min
May 11, 1:04 PM CDT	Flash Flood Warning	SJT	Brown	116 min
May 11, 1:04 PM CDT	Severe Thunderstorm Warning	SJT	Brown	41 min
May 11, 1:31 PM CDT	Areal Flood Advisory	SJT	San Saba	119 min
May 11, 2:05 PM CDT	Severe Thunderstorm Warning	SJT	Mason	40 min
May 11, 3:09 PM CDT	Areal Flood Advisory	SJT	Brown	111 min
May 11, 4:22 PM CDT	Severe Thunderstorm Warning	SJT	Mason	53 min
May 11, 5:17 PM CDT	Severe Thunderstorm Warning	SJT	Mason	43 min
May 11, 6:01 PM CDT	Severe Thunderstorm Warning	SJT	Mason	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning 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.