Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Austin/San Antonio, TX

March 22, 2021Burnet County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 22, 2021, 9:58 PM CDT for Burnet County, Williamson County, Texas. It was in force for 62 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 22, 2021, 9:58 PM CDT (02:58 UTC)
Expired
Mar 22, 2021, 11:00 PM CDT
In force
62 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Tornado
Possible
Hail
1.75 in
Wind
60.0 mph

Counties Burnet County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 30 km from the middle of the area, began a volume at 02:58 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.

What was reported inside it

TimeReportWhereRemark
Mar 22, 9:58 PM CDTTSTM WND DMGBertram, TXREPORTS OF MULTIPLE POWER LINES DOWN AND TWO BUILDINGS WITH DAMAGE. PARTS OF SH 29 ARE BLOCKED DUE TO DEBRIS. TIME ESTIMATED VIA RADAR.
Mar 22, 9:58 PM CDTTSTM WND DMGBertram, TXREPORTS OF MULTIPLE POWER LINES DOWN. DAMAGE TO TWO BUILDINGS AND DEBRIS BLOCKING THE ROAD ON SH 29. TIME ESTIMATED VIA RADAR.
Mar 22, 10:05 PM CDTHAIL 1.75Bertram, TXGOLF BALL HAIL BROKE THROUGH A SKYLIGHT. REPORT FORWARDED VIA MEDIA OUTLET SOCIAL MEDIA.
Mar 22, 10:30 PM CDTTSTM WND DMG4 Ssw Andice, TXAPPROXIMATELY 200 FEET OF FENCE KNOCKED DOWN. COINCIDES WITH A FUNNEL CLOUD REPORT.
Mar 22, 10:50 PM CDTTSTM WND DMG5 N Weir, TXQUARTER HAIL REPORTED IN WALBURG.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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

Fort Worth, TX (KFWD), launched 00:00Z, 3.0 hours before the alert went out and 234 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, Fort Worth, TX at 00:00Z on 2021-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2021-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 404 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
404 m²/s²
0-3 km storm-relative helicity
672 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

796 
WUUS54 KEWX 230258
SVREWX
TXC053-491-230400-
/O.NEW.KEWX.SV.W.0006.210323T0258Z-210323T0400Z/

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

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Central Williamson County in south central Texas...
  East central Burnet County in south central Texas...

* Until 1100 PM CDT.

* At 957 PM CDT, a severe thunderstorm was located near Bertram,
  moving east at 65 mph.

  HAZARD...Golf 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...
  Georgetown, Taylor, Granger, Bertram, Serenada, Leander, Bartlett,
  Liberty Hill, Jarrell, Florence, Thrall, Weir, Georgetown Dam,
  Granger Dam, Joppa, Andice, Oatmeal, Sun City, Mahomet and
  Laneport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3085 9757 3074 9727 3058 9720 3063 9808
      3074 9812 3087 9804
TIME...MOT...LOC 0257Z 272DEG 55KT 3074 9798 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

EW
1 follow-up statement
138 
WWUS54 KEWX 230318
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1018 PM CDT Mon Mar 22 2021

TXC053-230327-
/O.CAN.KEWX.SV.W.0006.000000T0000Z-210323T0400Z/
Burnet TX-
1018 PM CDT Mon Mar 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BURNET 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 3085 9757 3074 9727 3058 9721 3060 9766
      3068 9802 3069 9802 3079 9796 3086 9788
TIME...MOT...LOC 0317Z 277DEG 34KT 3072 9786 

$$

TXC491-230400-
/O.CON.KEWX.SV.W.0006.000000T0000Z-210323T0400Z/
Williamson TX-
1018 PM CDT Mon Mar 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR CENTRAL WILLIAMSON COUNTY...

At 1017 PM CDT, a severe thunderstorm was located near Liberty Hill,
or 10 miles west of Serenada, moving east at 40 mph.

HAZARD...Golf 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...
Georgetown, Taylor, Granger, Serenada, Bartlett, Liberty Hill,
Jarrell, Florence, Thrall, Weir, Georgetown Dam, Sun City, Granger
Dam, Andice, Theon, Laneport, Hoxie, Waterloo, Hare and Walburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3085 9757 3074 9727 3058 9721 3060 9766
      3068 9802 3069 9802 3079 9796 3086 9788
TIME...MOT...LOC 0317Z 277DEG 34KT 3072 9786 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

RUNYEN

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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.