Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Austin/San Antonio, TX

April 15, 2021Burnet County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 15, 2021, 3:21 PM CDT for Burnet County, Williamson County, Texas. It was in force for 54 min. 7 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: Apr 15, 2021, 3:21 PM CDT (20:21 UTC)
Expired: Apr 15, 2021, 4:15 PM CDT
In force: 54 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Burnet County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 59 km from the middle of the area, began a volume at 20:21 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

Time	Report	Where	Remark
Apr 15, 3:32 PM CDT	HAIL 1	Burnet, TX
Apr 15, 3:34 PM CDT	HAIL 2.5	Burnet, TX	MEASURED 2.56 INCH HAIL NEAR THE WALGREENS IN BURNET.
Apr 15, 3:40 PM CDT	HAIL 1	Bertram, TX
Apr 15, 3:52 PM CDT	HAIL 2.75	Bertram, TX
Apr 15, 4:00 PM CDT	HAIL 1.25	Liberty Hill, TX	HAIL COVERING THE GROUND.
Apr 15, 4:02 PM CDT	HAIL 1.5	4 Ese Liberty Hill, TX
Apr 15, 4:08 PM CDT	HAIL 1.5	5 Ne Leander, TX	PING PONG SIZE HAIL AT LAKE SIDE DRIVE AND LAKE SIDE COVE.

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.

Issued	Product	Office	Lasted
Apr 15, 8:36 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.4 hours before the alert went out and 236 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 629 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

652 
WUUS54 KEWX 152021
SVREWX
TXC053-491-152115-
/O.NEW.KEWX.SV.W.0046.210415T2021Z-210415T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
321 PM CDT Thu Apr 15 2021

The National Weather Service in Austin San Antonio has issued a

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

* Until 415 PM CDT.

* At 320 PM CDT, severe thunderstorms were located along a line
  extending from near Lampasas to Lake Victor to Inks Lake State
  Park, moving east at 50 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...
  Round Rock, Georgetown, Burnet, Bertram, Serenada, Buchanan Dam,
  Leander, Bartlett, Liberty Hill, Jarrell, Florence, Weir, Inks Lake
  State Park, Georgetown Dam, Watson, Lake Victor, Joppa, Andice,
  Shady Grove and Oatmeal.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3091 9783 3087 9763 3079 9741 3056 9770
      3061 9793 3063 9795 3062 9798 3071 9841
      3074 9837 3075 9840 3092 9834 3103 9822
      3103 9791
TIME...MOT...LOC 2020Z 278DEG 42KT 3106 9811 3089 9819 3072 9837 

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

KCW

4 follow-up statements

087 
WWUS54 KEWX 152030
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
330 PM CDT Thu Apr 15 2021

TXC053-491-152115-
/O.CON.KEWX.SV.W.0046.000000T0000Z-210415T2115Z/
Williamson TX-Burnet TX-
330 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHWESTERN WILLIAMSON AND NORTHEASTERN BURNET COUNTIES...

At 330 PM CDT, severe thunderstorms were located along a line
extending from near Kempner to near Joppa to near Burnet, moving east
at 50 mph.

HAZARD...Two inch 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 Rock, Georgetown, Burnet, Bertram, Serenada, Leander, Bartlett,
Liberty Hill, Jarrell, Florence, Weir, Georgetown Dam, Watson, Lake
Victor, Joppa, Andice, Shady Grove, Oatmeal, Briggs and Sun City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3091 9783 3087 9763 3079 9741 3056 9770
      3061 9793 3063 9795 3062 9798 3068 9829
      3088 9824 3103 9813 3103 9791
TIME...MOT...LOC 2030Z 278DEG 42KT 3104 9799 3087 9807 3071 9825 

HAIL...2.00IN
WIND...60MPH
 
$$

KCW

323 
WWUS54 KEWX 152036
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
336 PM CDT Thu Apr 15 2021

TXC053-491-152115-
/O.CON.KEWX.SV.W.0046.000000T0000Z-210415T2115Z/
Williamson TX-Burnet TX-
336 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHWESTERN WILLIAMSON AND NORTHEASTERN BURNET COUNTIES...

At 336 PM CDT, severe thunderstorms were located along a line
extending from near Kempner to near Joppa to near Burnet, moving east
at 50 mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts.

SOURCE...Public.

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 Rock, Georgetown, Burnet, Bertram, Serenada, Leander, Bartlett,
Liberty Hill, Jarrell, Florence, Weir, Georgetown Dam, Watson,
Oatmeal, Briggs, Sun City, Mahomet, Joppa, Andice and Shady Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

These are dangerous storms. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 3091 9783 3087 9763 3079 9741 3056 9770
      3061 9793 3063 9795 3062 9798 3067 9822
      3087 9816 3103 9806 3103 9791
TIME...MOT...LOC 2036Z 278DEG 42KT 3104 9793 3087 9801 3070 9819 

HAIL...2.50IN
WIND...60MPH
 
$$

KCW

031 
WWUS54 KEWX 152053
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
353 PM CDT Thu Apr 15 2021

TXC053-491-152115-
/O.CON.KEWX.SV.W.0046.000000T0000Z-210415T2115Z/
Williamson TX-Burnet TX-
353 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHWESTERN WILLIAMSON AND EAST CENTRAL BURNET COUNTIES...

At 353 PM CDT, severe thunderstorms were located along a line
extending from near Killeen to Florence to near Liberty Hill, moving
east at 50 mph.

These are very dangerous storms.

HAZARD...Baseball size hail moving into Liberty Hill/Northern 
         Leander and 60 mph wind gusts.

SOURCE...Public.

IMPACT...People and animals outdoors will be severely injured. 
         Expect shattered windows, extensive damage to roofs, 
         siding, and vehicles.

Locations impacted include...
Round Rock, Georgetown, Serenada, Leander, Bartlett, Liberty Hill,
Jarrell, Florence, Weir, Georgetown Dam, Sun City, Mahomet, Andice,
Theon, Walburg, Schwertner and Seward Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

These are dangerous storms. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 3091 9783 3087 9763 3079 9741 3056 9770
      3061 9793 3063 9795 3062 9798 3065 9811
      3079 9799 3085 9792
TIME...MOT...LOC 2053Z 278DEG 44KT 3102 9774 3084 9779 3064 9798 

HAIL...2.75IN
WIND...60MPH
 
$$

KCW

100 
WWUS54 KEWX 152107
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
407 PM CDT Thu Apr 15 2021

TXC053-491-152115-
/O.EXP.KEWX.SV.W.0046.000000T0000Z-210415T2115Z/
Williamson TX-Burnet TX-
407 PM CDT Thu Apr 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WILLIAMSON AND
EAST CENTRAL BURNET COUNTIES WILL EXPIRE AT 415 PM CDT...
            
The storms which prompted the warning have weakened below severe 
limits across northern portions of the warning area, and no longer 
pose an immediate threat to life or property. Therefore, the warning 
will be allowed to expire.  However hail is still possible with 
these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 500 PM CDT for
south central Texas.

Remember, a Severe Thunderstorm Warning still remains in effect for
Southern Williamson and northern TravisCounty (Warning 047)

LAT...LON 3091 9783 3087 9763 3079 9741 3056 9770
      3061 9793 3063 9795 3062 9798 3065 9811
      3079 9799 3085 9792
TIME...MOT...LOC 2105Z 278DEG 42KT 3101 9762 3083 9767 3063 9786 

$$

KCW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:34 AM CDT	Special Weather Statement	EWX	Kinney	41 min
Apr 15, 8:12 AM CDT	Special Weather Statement	EWX	Edwards	48 min
Apr 15, 8:14 AM CDT	Special Weather Statement	EWX	Kinney	46 min
Apr 15, 8:31 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	59 min
Apr 15, 8:40 AM CDT	Severe Thunderstorm Warning	EWX	Kinney	65 min
Apr 15, 8:55 AM CDT	Special Weather Statement	EWX	Edwards	50 min
Apr 15, 9:04 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	24 min
Apr 15, 9:32 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	17 min
Apr 15, 9:42 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	63 min
Apr 15, 10:42 AM CDT	Severe Thunderstorm Warning	EWX	Uvalde	45 min
Apr 15, 12:15 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	60 min
Apr 15, 1:07 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis	53 min
Apr 15, 1:52 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	36 min
Apr 15, 2:07 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	40 min
Apr 15, 2:57 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	63 min
Apr 15, 3:56 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	49 min
Apr 15, 4:11 PM CDT	Special Weather Statement	EWX	Williamson	49 min
Apr 15, 4:36 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	54 min
Apr 15, 5:22 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Fayette, Lee	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.