Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 8, NWS Austin/San Antonio, TX

March 22, 20215 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 22, 2021, 10:11 PM CDT for 5 counties in Texas. It was in force for 64 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
Mar 22, 2021, 10:11 PM CDT (03:11 UTC)
Expired
Mar 22, 2021, 11:15 PM CDT
In force
64 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Blanco County, TX, Burnet County, TX, Gillespie County, TX, Hays County, TX, Travis County, TX

The radar

The Austin/San Antonio radar (KEWX), 80 km from the middle of the area, began a volume at 03:13 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.

IssuedProductOfficeLasted
Mar 22, 6:05 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 3.2 hours before the alert went out and 259 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2021-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1091 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2021-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 204 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
1091 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1422 m above ground
0-6 km bulk shear
86 kt
0-1 km storm-relative helicity
204 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

187 
WUUS54 KEWX 230311
SVREWX
TXC031-053-171-209-453-230415-
/O.NEW.KEWX.SV.W.0008.210323T0311Z-210323T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
1011 PM CDT Mon Mar 22 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Hays County in south central Texas...
  West central Travis County in south central Texas...
  Blanco County in south central Texas...
  Eastern Gillespie County in south central Texas...
  South central Burnet County in south central Texas...

* Until 1115 PM CDT.

* At 1011 PM CDT, a severe thunderstorm was located near Stonewall,
  or 10 miles east of Fredericksburg, moving east at 35 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Round Mountain, Lago Vista, Johnson City, Stonewall, Spicewood,
  Blowout, Sandy, Willow City, LBJ State Park, Rocky Creek, Hye,
  Cypress Mill, Blumenthal, Henly, Pedernales Falls State Park,
  Albert, Briarcliff and LBJ National Historical Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3048 9800 3010 9821 3019 9878 3035 9881
      3050 9862
TIME...MOT...LOC 0311Z 278DEG 30KT 3030 9870 

HAIL...1.50IN
WIND...60MPH
 
$$

EW
2 follow-up statements
496 
WWUS54 KEWX 230332
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1032 PM CDT Mon Mar 22 2021

TXC171-230341-
/O.CAN.KEWX.SV.W.0008.000000T0000Z-210323T0415Z/
Gillespie TX-
1032 PM CDT Mon Mar 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN GILLESPIE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
south central Texas.

LAT...LON 3048 9800 3010 9821 3016 9859 3019 9859
      3035 9853 3049 9837
TIME...MOT...LOC 0331Z 278DEG 30KT 3028 9850 

$$

TXC031-053-209-453-230415-
/O.CON.KEWX.SV.W.0008.000000T0000Z-210323T0415Z/
Hays TX-Travis TX-Blanco TX-Burnet TX-
1032 PM CDT Mon Mar 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR NORTHWESTERN HAYS...WEST CENTRAL TRAVIS...BLANCO AND SOUTH
CENTRAL BURNET COUNTIES...

At 1031 PM CDT, a severe thunderstorm was located over Rocky Creek,
or 13 miles north of Blanco, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Round Mountain, Lago Vista, Johnson City, Rocky Creek, Spicewood,
Hye, Cypress Mill, Henly, Sandy, Pedernales Falls State Park and
Briarcliff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3048 9800 3010 9821 3016 9859 3019 9859
      3035 9853 3049 9837
TIME...MOT...LOC 0331Z 278DEG 30KT 3028 9850 

HAIL...1.00IN
WIND...60MPH
 
$$

EW
514 
WWUS54 KEWX 230408
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1108 PM CDT Mon Mar 22 2021

TXC031-053-209-453-230417-
/O.EXP.KEWX.SV.W.0008.000000T0000Z-210323T0415Z/
Hays TX-Travis TX-Blanco TX-Burnet TX-
1108 PM CDT Mon Mar 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HAYS...WEST
CENTRAL TRAVIS...BLANCO AND SOUTH CENTRAL BURNET COUNTIES WILL EXPIRE
AT 1115 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central Texas.

LAT...LON 3048 9800 3010 9821 3016 9859 3019 9859
      3035 9853 3049 9837
TIME...MOT...LOC 0407Z 278DEG 30KT 3024 9817 

$$

EW

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 22, 8:32 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano58 min
Mar 22, 9:02 PM CDTSpecial Weather StatementEWXBlanco, Gillespie, Llano43 min
Mar 22, 9:14 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano, Williamson61 min
Mar 22, 9:16 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Gillespie, Llano59 min
Mar 22, 9:58 PM CDTSevere Thunderstorm WarningEWXBurnet, Williamson62 min
Mar 22, 10:05 PM CDTSevere Thunderstorm WarningEWXBandera, Blanco, Comal, Kendall, Kerr55 min
Mar 22, 10:26 PM CDTTornado WarningEWXWilliamson27 min
Mar 22, 10:34 PM CDTSpecial Weather StatementEWXGillespie41 min
Mar 22, 10:56 PM CDTSevere Thunderstorm WarningEWXWilliamson41 min
Mar 22, 10:57 PM CDTSpecial Weather StatementEWXComal, Hays, Kendall48 min
Mar 22, 11:02 PM CDTSpecial Weather StatementEWXTravis58 min
Mar 22, 11:31 PM CDTSevere Thunderstorm WarningEWXBandera, Edwards, Medina, Real, Uvalde59 min
Mar 22, 11:34 PM CDTSpecial Weather StatementEWXBandera, Kendall, Kerr41 min
Mar 22, 11:44 PM CDTSevere Thunderstorm WarningEWXBandera, Gillespie, Kendall, Kerr, Medina61 min
Mar 22, 11:55 PM CDTSpecial Weather StatementEWXBastrop65 min
Mar 23, 12:25 AM CDTSpecial Weather StatementEWXLee65 min
Mar 23, 12:25 AM CDTSevere Thunderstorm WarningEWXBandera, Medina, Uvalde65 min
Mar 23, 12:35 AM CDTSevere Thunderstorm WarningEWXBandera, Bexar, Blanco, Comal, Hays, Kendall and 1 more55 min
Mar 23, 1:06 AM CDTTornado WarningEWXComal, Guadalupe, Hays24 min
Mar 23, 1:13 AM CDTSevere Thunderstorm WarningEWXBandera, Bexar, Comal, Guadalupe, Kendall, Medina and 1 more62 min
Mar 23, 1:19 AM CDTSpecial Weather StatementEWXMedina41 min
Mar 23, 1:26 AM CDTSevere Thunderstorm WarningEWXBastrop, Caldwell, Comal, Gonzales, Guadalupe, Hays and 1 more64 min
Mar 23, 1:48 AM CDTSevere Thunderstorm WarningEWXAtascosa, Bexar, Frio, Medina34 min
Mar 23, 1:58 AM CDTSevere Thunderstorm WarningEWXGonzales, Guadalupe32 min
Mar 23, 2:13 AM CDTSevere Thunderstorm WarningEWXBexar, Gonzales, Guadalupe, Karnes, Wilson26 min
Mar 23, 2:16 AM CDTSevere Thunderstorm WarningEWXBastrop, Caldwell, Fayette, Gonzales, Guadalupe, Lavaca and 1 more59 min
Mar 23, 3:03 AM CDTSevere Thunderstorm WarningEWXFayette, Lavaca33 min
Mar 23, 3:43 AM CDTSpecial Weather StatementEWXDeWitt, Lavaca47 min
Mar 23, 4:07 AM CDTSevere Thunderstorm WarningEWXLavaca38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021

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.