Alert archive / Texas / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 141, NWS Austin/San Antonio, TX

July 11, 2022Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 11, 2022, 4:15 PM CDT for Williamson County, Texas. It was in force for 45 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: Jul 11, 2022, 4:15 PM CDT (21:15 UTC)
Expired: Jul 11, 2022, 5:00 PM CDT
In force: 45 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Williamson County, TX

The radar

The Ft Hood radar (KGRK), 22 km from the middle of the area, began a volume at 21:17 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 12:00Z, 9.3 hours before the alert went out and 325 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: 243 J/kg
Mixed-layer CIN: -299 J/kg
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 11, 2:35 PM CDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 11, 2:35 PM CDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jul 11, 6:08 AM CDT, 10 hours 7 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
608 AM CDT Mon Jul 11 2022

TXZ171>173-183>194-202>209-217>225-228-121115-
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-
608 AM CDT Mon Jul 11 2022

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

An Excessive Heat Warning is in effect through 7 PM Tuesday
evening for areas along and east of Interstate 35. A Heat
Advisory is in effect through 7 PM Tuesday evening for the Hill
Country and Rio Grande Plains. Highs today are expected to soar
to 103 to 110, with heat indices up to 112. Heat related
illnesses are possible, especially with extended periods of time
outdoors during peak heating hours.

Isolated thunderstorms are possible over our area this afternoon
into early evening. Strong wind gusts are the main threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

An Excessive Heat Warning is in effect through 7 PM Tuesday
evening for areas along and east of Interstate 35. A Heat
Advisory is in effect through 7 PM Tuesday evening for the Hill
Country and Rio Grande Plains. Highs on Tuesday are expected to
soar to 103 to 108, with heat indices up to 112. Heat related
illnesses are possible, especially with extended periods of time
outdoors during peak heating hours.

Above normal temperatures will continue Wednesday through Sunday.
There remains a potential for additional Heat Advisories.

Isolated thunderstorms are possible over parts of our area each
afternoon into early evening. Strong wind gusts are the main
threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, Jul 11, 2:53 PM CDT, 1 hour 22 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
253 PM CDT Mon Jul 11 2022

TXZ191>193-208-112045-
Caldwell TX-Bastrop TX-Hays TX-Travis TX-
253 PM CDT Mon Jul 11 2022

...A strong thunderstorm will impact portions of north central
Caldwell, northeastern Hays, south central Travis and west central
Bastrop Counties through 345 PM CDT...

At 253 PM CDT, Doppler radar was tracking a strong thunderstorm near
Barton Creek, or near Tanglewood Forest, moving southeast at 20 mph.

HAZARD...Winds in excess of 40 mph and up to half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Austin, Buda, Lockhart, Dripping Springs, Tanglewood Forest, Austin
Bergstrom Int Airport, West Lake Hills, Rollingwood, Mustang Ridge,
Niederwald, Bear Creek, Barton Creek, Shady Hollow, Onion Creek,
Cedar Creek, Manchaca, Sunset Valley, San Leanna, Hays and Creedmoor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3022 9800 3035 9785 3009 9747 2990 9769
TIME...MOT...LOC 1953Z 314DEG 20KT 3024 9787

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:04 PM CDT	Special Weather Statement	EWX	Guadalupe	26 min
Jul 10, 8:06 PM CDT	Special Weather Statement	EWX	Val Verde	24 min
Jul 11, 2:53 PM CDT	Special Weather Statement	EWX	Travis	52 min
Jul 11, 4:21 PM CDT	Special Weather Statement	EWX	Gillespie	39 min
Jul 11, 4:22 PM CDT	Special Weather Statement	EWX	Comal	38 min
Jul 11, 4:40 PM CDT	Special Weather Statement	EWX	Kendall	50 min
Jul 11, 5:10 PM CDT	Special Weather Statement	EWX	Real	50 min
Jul 11, 5:15 PM CDT	Special Weather Statement	EWX	Lee	45 min
Jul 11, 6:39 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 2022 Every severe thunderstorm warning in 2022

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.