Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Austin/San Antonio, TX

May 10, 2021Bandera County, Kerr County, Real County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 10, 2021, 4:21 PM CDT for Bandera County, Kerr County, Real County, Texas. It was in force for 37 min. 2 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: May 10, 2021, 4:21 PM CDT (21:21 UTC)
Expired: May 10, 2021, 4:58 PM CDT
In force: 37 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Bandera County, TX, Kerr County, TX, Real County, TX

The radar

The Laughlin AFB radar (KDFX), 85 km from the middle of the area, began a volume at 21:22 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
May 10, 4:47 PM CDT	HAIL 0.7	8 N Leakey, TX
May 10, 4:52 PM CDT	HAIL 1.5	6 Wnw Lost Maples State, TX	TIME ESTIMATED BY RADAR.

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
May 10, 1:48 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 9.4 hours before the alert went out and 123 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: 2989 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

567 
WUUS54 KEWX 102121
SVREWX
TXC019-265-385-102215-
/O.NEW.KEWX.SV.W.0110.210510T2121Z-210510T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
421 PM CDT Mon May 10 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Bandera County in south central Texas...
  West central Kerr County in south central Texas...
  Central Real County in south central Texas...

* Until 515 PM CDT.

* At 420 PM CDT, a severe thunderstorm was located 8 miles north of
  Tuff, or 11 miles north of Leakey, moving east at 30 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Vanderpool, Lost Maples State Natural Area, Tuff and Prade Ranch. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2981 9995 3001 9991 2995 9928 2965 9939
TIME...MOT...LOC 2120Z 279DEG 25KT 2989 9980 

HAIL...1.25IN
WIND...<50MPH
 
$$

KCW

2 follow-up statements

146 
WWUS54 KEWX 102136
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
436 PM CDT Mon May 10 2021

TXC265-102145-
/O.CAN.KEWX.SV.W.0110.000000T0000Z-210510T2215Z/
Kerr TX-
436 PM CDT Mon May 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL KERR 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 1000 PM CDT for
south central Texas.

LAT...LON 2994 9969 2991 9969 2991 9947 2988 9931
      2965 9939 2978 9984 2996 9979
TIME...MOT...LOC 2135Z 286DEG 21KT 2985 9974 

$$

TXC019-385-102215-
/O.CON.KEWX.SV.W.0110.000000T0000Z-210510T2215Z/
Bandera TX-Real TX-
436 PM CDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN BANDERA AND EAST CENTRAL REAL COUNTIES...

At 435 PM CDT, a severe thunderstorm was located near Tuff, or 8
miles north of Leakey, moving east at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Vanderpool, Lost Maples State Natural Area, Tuff and Prade Ranch. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2994 9969 2991 9969 2991 9947 2988 9931
      2965 9939 2978 9984 2996 9979
TIME...MOT...LOC 2135Z 286DEG 21KT 2985 9974 

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

KCW

215 
WWUS54 KEWX 102158
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
458 PM CDT Mon May 10 2021

TXC019-385-102208-
/O.CAN.KEWX.SV.W.0110.000000T0000Z-210510T2215Z/
Bandera TX-Real TX-
458 PM CDT Mon May 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BANDERA AND EAST
CENTRAL REAL COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail is
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Texas.

LAT...LON 2994 9969 2991 9969 2991 9947 2988 9931
      2965 9939 2978 9984 2996 9979
TIME...MOT...LOC 2156Z 279DEG 25KT 2982 9956 

$$

KCW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:08 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Gillespie, Llano	67 min
May 9, 7:47 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Gillespie, Kendall	58 min
May 9, 9:53 PM CDT	Special Weather Statement	EWX	Gillespie	52 min
May 10, 3:19 PM CDT	Special Weather Statement	EWX	Real	41 min
May 10, 3:44 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	46 min
May 10, 5:56 PM CDT	Special Weather Statement	EWX	Edwards	49 min
May 10, 6:00 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	60 min
May 10, 6:17 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	58 min
May 10, 6:49 PM CDT	Special Weather Statement	EWX	Dimmit, Maverick	41 min
May 10, 6:59 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	61 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.