Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS Austin/San Antonio, TX

May 3, 20215 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 3, 2021, 8:58 PM CDT for 5 counties in Texas. It was in force for 62 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: May 3, 2021, 8:58 PM CDT (01:58 UTC)
Expired: May 3, 2021, 10:00 PM CDT
In force: 62 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blanco County, TX, Burnet County, TX, Llano County, TX, Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 65 km from the middle of the area, began a volume at 01:58 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.

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 3, 7:01 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.0 hours before the alert went out and 238 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: 3299 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 13.9

Open this sounding in Storm Lab

The text

As transmitted.

091 
WUUS54 KEWX 040158
SVREWX
TXC031-053-299-453-491-040300-
/O.NEW.KEWX.SV.W.0098.210504T0158Z-210504T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
858 PM CDT Mon May 3 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Williamson County in south central Texas...
  Northwestern Travis County in south central Texas...
  Northeastern Blanco County in south central Texas...
  Southeastern Llano County in south central Texas...
  Burnet County in south central Texas...

* Until 1000 PM CDT.

* At 856 PM CDT, a severe thunderstorm was located over Round 
  Mountain, moving northeast at 35 mph. Another severe thunderstorm 
  was located 10 miles northwest of Burnet, moving northeast at 20 
  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...
  Burnet, Marble Falls, Kingsland, Bertram, Round Mountain, Buchanan
  Dam, Granite Shoals, Horseshoe Bay, Meadowlakes, Highland Haven,
  Inks Lake State Park, Spicewood, Watson, Lake Victor, Cypress Mill,
  Joppa, Shady Grove, Oatmeal, Briggs and Mahomet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail, damaging winds, and continuous cloud to ground lightning 
are occurring with these storms. 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.

Torrential rainfall is occurring with these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3091 9783 3090 9781 3033 9819 3044 9854
      3103 9832 3103 9791
TIME...MOT...LOC 0156Z 204DEG 30KT 3046 9839 

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

BRADY

2 follow-up statements

718 
WWUS54 KEWX 040220
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
920 PM CDT Mon May 3 2021

TXC031-040230-
/O.CAN.KEWX.SV.W.0098.000000T0000Z-210504T0300Z/
Blanco TX-
920 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BLANCO 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 1100 PM CDT for
south central Texas.

LAT...LON 3049 9808 3058 9849 3103 9832 3103 9791
      3091 9783 3090 9781
TIME...MOT...LOC 0220Z 248DEG 32KT 3077 9834 

$$

TXC053-299-453-491-040300-
/O.CON.KEWX.SV.W.0098.000000T0000Z-210504T0300Z/
Williamson TX-Travis TX-Llano TX-Burnet TX-
920 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHWESTERN WILLIAMSON...NORTHWESTERN TRAVIS...EAST CENTRAL
LLANO AND BURNET COUNTIES...

At 920 PM CDT, a severe thunderstorm was located near Inks Lake State
Park, or near Buchanan Dam, 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...
Burnet, Marble Falls, Kingsland, Bertram, Buchanan Dam, Granite
Shoals, Horseshoe Bay, Meadowlakes, Highland Haven, Inks Lake State
Park, Watson, Oatmeal, Briggs, Lake Victor, Mahomet, Sunnylane,
Longhorn Cavern State Park, Joppa, Smithwick and Shady Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

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.

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

&&

LAT...LON 3049 9808 3058 9849 3103 9832 3103 9791
      3091 9783 3090 9781
TIME...MOT...LOC 0220Z 248DEG 32KT 3077 9834 

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

BRADY

238 
WWUS54 KEWX 040256
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
956 PM CDT Mon May 3 2021

TXC053-299-453-491-040306-
/O.EXP.KEWX.SV.W.0098.000000T0000Z-210504T0300Z/
Williamson TX-Travis TX-Llano TX-Burnet TX-
956 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WILLIAMSON...
NORTHWESTERN TRAVIS...EAST CENTRAL LLANO AND BURNET COUNTIES WILL
EXPIRE AT 1000 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 1100 PM CDT for
south central Texas.

LAT...LON 3049 9808 3058 9849 3103 9832 3103 9791
      3091 9783 3090 9781
TIME...MOT...LOC 0256Z 204DEG 30KT 3102 9821 

$$

BRADY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:10 PM CDT	Special Weather Statement	EWX	Kendall	50 min
May 3, 7:12 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Medina	63 min
May 3, 7:14 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Blanco, Gillespie, Kendall, Kerr and 1 more	61 min
May 3, 7:30 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Comal, Kendall, Medina	3 hr
May 3, 7:49 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe	56 min
May 3, 8:12 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie, Kendall, Llano	48 min
May 3, 8:19 PM CDT	Areal Flood Advisory	EWX	Bexar, Guadalupe, Wilson	3 hr
May 3, 8:23 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Guadalupe, Wilson	22 min
May 3, 8:43 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Gonzales, Guadalupe, Wilson	62 min
May 3, 8:53 PM CDT	Special Weather Statement	EWX	Burnet	52 min
May 3, 9:16 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano, Travis, Williamson	41 min
May 3, 10:08 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	30 min
May 4, 6:33 AM CDT	Special Weather Statement	EWX	Caldwell	42 min
May 4, 6:41 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	64 min
May 4, 7:25 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Travis	50 min
May 4, 7:37 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Fayette, Lee	53 min
May 4, 8:05 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	13 min
May 4, 8:20 AM CDT	Special Weather Statement	EWX	Hays, Travis	40 min
May 4, 8:22 AM CDT	Special Weather Statement	EWX	Lee	38 min
May 4, 8:22 AM CDT	Special Weather Statement	EWX	Lee	38 min
May 4, 8:25 AM CDT	Special Weather Statement	EWX	Lee	35 min
May 4, 8:59 AM CDT	Special Weather Statement	EWX	Hays, Travis	46 min
May 4, 9:27 AM CDT	Special Weather Statement	EWX	Guadalupe	33 min
May 4, 9:48 AM CDT	Special Weather Statement	EWX	Bastrop	27 min
May 4, 9:58 AM CDT	Special Weather Statement	EWX	Caldwell	47 min
May 4, 10:04 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette	41 min
May 4, 10:38 AM CDT	Special Weather Statement	EWX	Bastrop	37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every 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.