Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Austin/San Antonio, TX

April 15, 20214 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 15, 2021, 4:36 PM CDT for 4 counties in Texas. It was in force for 54 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: Apr 15, 2021, 4:36 PM CDT (21:36 UTC)
Expired: Apr 15, 2021, 5:30 PM CDT
In force: 54 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 2.5 in
Wind: 60.0 mph

Counties Bastrop County, TX, Lee County, TX, Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 45 km from the middle of the area, began a volume at 21:39 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
Apr 15, 4:36 PM CDT	HAIL 2	4 Ene Pflugerville, TX
Apr 15, 4:55 PM CDT	HAIL 1	Elgin, TX
Apr 15, 4:55 PM CDT	HAIL 1.5	1 Sse Elgin, TX
Apr 15, 5:00 PM CDT	HAIL 1.75	1 E Elgin, TX
Apr 15, 5:10 PM CDT	HAIL 0.7	2 Ene Mcdade, TX

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, 9.6 hours before the alert went out and 279 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.

265 
WUUS54 KEWX 152136
SVREWX
TXC021-287-453-491-152230-
/O.NEW.KEWX.SV.W.0048.210415T2136Z-210415T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
436 PM CDT Thu Apr 15 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Southeastern Williamson County in south central Texas...
  Northeastern Travis County in south central Texas...
  Northeastern Bastrop County in south central Texas...
  Central Lee County in south central Texas...

* Until 530 PM CDT.

* At 435 PM CDT, a severe thunderstorm was located near Pflugerville,
  moving southeast at 45 mph.

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

  SOURCE...Trained weather spotters.

  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...
  Austin, Pflugerville, Elgin, Giddings, Hutto, Manor, Fedor, Paige,
  Circle D-KC Estates, Camp Swift, Coupland, Knobb Springs, Serbin,
  Rices Crossing, Blue, McDade, Cedar Hills, Loebau, Hills and
  Lincoln.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Large hail and continuous cloud to ground lightning are 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 3036 9764 3056 9752 3030 9682 3002 9706
TIME...MOT...LOC 2135Z 299DEG 37KT 3043 9750 

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

KCW

3 follow-up statements

334 
WWUS54 KEWX 152146
SVSEWX

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

TXC021-287-453-491-152230-
/O.CON.KEWX.SV.W.0048.000000T0000Z-210415T2230Z/
Williamson TX-Travis TX-Bastrop TX-Lee TX-
446 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHEASTERN WILLIAMSON...EAST CENTRAL TRAVIS...NORTHEASTERN
BASTROP AND CENTRAL LEE COUNTIES...

At 445 PM CDT, a severe thunderstorm was located just northwest of 
Elgin, moving southeast at 40 mph.

HAZARD...Tennis ball size hail.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Elgin, Giddings, Manor, Fedor, Paige, Circle D-KC Estates, Camp
Swift, Coupland, Knobb Springs, Serbin, Rices Crossing, Blue, McDade,
Cedar Hills, Loebau, Hills, Lincoln, Butler, Manheim and Bastrop
State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a dangerous storm. 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 3032 9757 3053 9744 3030 9682 3002 9706
TIME...MOT...LOC 2145Z 299DEG 35KT 3038 9742 

HAIL...2.50IN
WIND...<50MPH
 
$$

KCW

469 
WWUS54 KEWX 152202
SVSEWX

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

TXC453-491-152212-
/O.CAN.KEWX.SV.W.0048.000000T0000Z-210415T2230Z/
Williamson TX-Travis TX-
502 PM CDT Thu Apr 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILLIAMSON AND
EAST CENTRAL TRAVIS COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3002 9706 3024 9743 3041 9731 3044 9721
      3030 9682
TIME...MOT...LOC 2202Z 298DEG 36KT 3030 9726 

$$

TXC021-287-152230-
/O.CON.KEWX.SV.W.0048.000000T0000Z-210415T2230Z/
Bastrop TX-Lee TX-
502 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHEASTERN BASTROP AND CENTRAL LEE COUNTIES...

At 502 PM CDT, a severe thunderstorm was located 8 miles north of
Camp Swift, or 8 miles southeast of Elgin, moving southeast at 40
mph.

HAZARD...Ping pong ball size hail.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Giddings, Fedor, Paige, Circle D-KC Estates, Camp Swift, Knobb
Springs, Serbin, Blue, McDade, Cedar Hills, Loebau, Hills, Lincoln,
Butler, Manheim and Bastrop State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3002 9706 3024 9743 3041 9731 3044 9721
      3030 9682
TIME...MOT...LOC 2202Z 298DEG 36KT 3030 9726 

HAIL...1.50IN
WIND...<50MPH
 
$$

KCW

129 
WWUS54 KEWX 152220
SVSEWX

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

TXC021-287-152230-
/O.CON.KEWX.SV.W.0048.000000T0000Z-210415T2230Z/
Bastrop TX-Lee TX-
520 PM CDT Thu Apr 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHEASTERN BASTROP AND CENTRAL LEE COUNTIES...

At 520 PM CDT, a severe thunderstorm was located over Paige, or 11
miles west of Giddings, moving southeast at 35 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Giddings, Fedor, Paige, Circle D-KC Estates, Serbin, Hills, Lincoln,
Manheim and Loebau.

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 3002 9706 3023 9726 3040 9709 3030 9682
TIME...MOT...LOC 2220Z 300DEG 32KT 3022 9712 

HAIL...1.00IN
WIND...<50MPH
 
$$

HAMPSHIRE

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, 3:21 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	54 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, 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.