Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 5, NWS Austin/San Antonio, TX

March 22, 20214 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 22, 2021, 9:16 PM CDT for 4 counties in Texas. It was in force for 59 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, 9:16 PM CDT (02:16 UTC)
Expired
Mar 22, 2021, 10:15 PM CDT
In force
59 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, Llano County, TX

The radar

The Austin/San Antonio radar (KEWX), 115 km from the middle of the area, began a volume at 02:15 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, 2.3 hours before the alert went out and 227 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.

404 
WUUS54 KEWX 230216
SVREWX
TXC031-053-171-299-230315-
/O.NEW.KEWX.SV.W.0005.210323T0216Z-210323T0315Z/

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

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Blanco County in south central Texas...
  Gillespie County in south central Texas...
  Southern Llano County in south central Texas...
  Southwestern Burnet County in south central Texas...

* Until 1015 PM CDT.

* At 916 PM CDT, a severe thunderstorm was located near Cherry
  Spring, or 12 miles northwest of Fredericksburg, moving east at 45
  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...
  Fredericksburg, Marble Falls, Round Mountain, Granite Shoals,
  Horseshoe Bay, Johnson City, Meadowlakes, Stonewall, Highland
  Haven, Blowout, Tivydale, Rocky Creek, Crabapple, Cherry Spring,
  Enchanted Rock State Natural Area, Sandy, Doss, Willow City, Eckert
  and Hye.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3068 9830 3025 9824 3023 9909 3032 9925
      3044 9920 3049 9910 3050 9905 3050 9897
      3052 9896
TIME...MOT...LOC 0216Z 265DEG 39KT 3042 9899 

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

EW
2 follow-up statements
411 
WWUS54 KEWX 230236
SVSEWX

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

TXC031-053-171-299-230315-
/O.CON.KEWX.SV.W.0005.000000T0000Z-210323T0315Z/
Blanco TX-Gillespie TX-Llano TX-Burnet TX-
936 PM CDT Mon Mar 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR NORTHWESTERN BLANCO...CENTRAL GILLESPIE...SOUTHEASTERN LLANO AND
SOUTHWESTERN BURNET COUNTIES...

At 936 PM CDT, a severe thunderstorm was located over Eckert, or 14
miles northeast of Fredericksburg, moving east at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Fredericksburg, Marble Falls, Kingsland, Round Mountain, Granite
Shoals, Horseshoe Bay, Johnson City, Meadowlakes, Stonewall, Highland
Haven, Blowout, Enchanted Rock State Natural Area, Tivydale, Sandy,
Willow City, Rocky Creek, Eckert, Crabapple, Hye and Pedernales Falls
State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3068 9830 3025 9824 3023 9909 3030 9921
      3037 9914 3041 9904 3044 9897 3047 9888
      3056 9881
TIME...MOT...LOC 0236Z 265DEG 39KT 3044 9874 

HAIL...1.25IN
WIND...60MPH
 
$$

EW
235 
WWUS54 KEWX 230246
SVSEWX

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

TXC031-053-171-299-230315-
/O.CON.KEWX.SV.W.0005.000000T0000Z-210323T0315Z/
Blanco TX-Gillespie TX-Llano TX-Burnet TX-
946 PM CDT Mon Mar 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR NORTHWESTERN BLANCO...NORTHEASTERN GILLESPIE...SOUTHEASTERN LLANO
AND SOUTHWESTERN BURNET COUNTIES...

At 946 PM CDT, a severe thunderstorm was located over Blowout, or 14
miles west of Round Mountain, moving east at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Fredericksburg, Marble Falls, Round Mountain, Granite Shoals,
Horseshoe Bay, Johnson City, Meadowlakes, Stonewall, Highland Haven,
Blowout, Sandy, Willow City, Rocky Creek, Hye, Eckert, Crabapple, LBJ
State Park, Pedernales Falls State Park, Cottonwood Shores and
Sunrise Beach Village.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3068 9830 3025 9824 3023 9899 3031 9903
      3042 9893 3049 9875
TIME...MOT...LOC 0246Z 265DEG 39KT 3045 9861 

HAIL...1.25IN
WIND...60MPH
 
$$

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, 9:58 PM CDTSevere Thunderstorm WarningEWXBurnet, Williamson62 min
Mar 22, 10:05 PM CDTSevere Thunderstorm WarningEWXBandera, Blanco, Comal, Kendall, Kerr55 min
Mar 22, 10:11 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Gillespie, Hays, Travis64 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.