Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 140, NWS Austin/San Antonio, TX

May 28, 2021Burnet County, Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 28, 2021, 5:15 PM CDT for Burnet County, Llano County, Texas. It was in force for 60 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 28, 2021, 5:15 PM CDT (22:15 UTC)
Expired: May 28, 2021, 6:15 PM CDT
In force: 60 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 2.0 in
Wind: 50.0 mph

Counties Burnet County, TX, Llano County, TX

The radar

The Ft Hood radar (KGRK), 86 km from the middle of the area, began a volume at 22:17 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 28, 12:14 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.3 hours before the alert went out and 257 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: 313 J/kg
Mixed-layer CIN: -386 J/kg
Mixed-layer LCL: 694 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

As transmitted.

090 
WUUS54 KEWX 282215
SVREWX
TXC053-299-282315-
/O.NEW.KEWX.SV.W.0140.210528T2215Z-210528T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
515 PM CDT Fri May 28 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northeastern Llano County in south central Texas...
  Southwestern Burnet County in south central Texas...

* Until 615 PM CDT.

* At 514 PM CDT, a severe thunderstorm was located over Stolz, or
  near Buchanan Dam, moving east at 25 mph.

  HAZARD...Two inch hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Burnet, Marble Falls, Kingsland, Buchanan Dam, Gainesville, Granite
  Shoals, Meadowlakes, Highland Haven, Inks Lake State Park, Lone
  Grove, Oatmeal, Stolz, Longhorn Cavern State Park, Smithwick,
  Cottonwood Shores and Sunrise Beach Village.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3069 9802 3049 9812 3067 9863 3083 9860
TIME...MOT...LOC 2214Z 281DEG 24KT 3078 9852 

HAIL...2.00IN
WIND...<50MPH
 
$$

CP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:15 PM CDT	Special Weather Statement	EWX	Val Verde	45 min
May 27, 8:15 PM CDT	Special Weather Statement	EWX	Val Verde	45 min
May 27, 8:48 PM CDT	Special Weather Statement	EWX	Val Verde	42 min
May 28, 4:38 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	52 min
May 28, 5:07 PM CDT	Special Weather Statement	EWX	Llano	38 min
May 28, 5:28 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	62 min
May 28, 5:33 PM CDT	Special Weather Statement	EWX	Llano	42 min
May 28, 5:50 PM CDT	Severe Thunderstorm Warning	EWX	Llano	40 min
May 28, 6:06 PM CDT	Areal Flood Advisory	EWX	Burnet, Llano	3 hr
May 28, 6:12 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Travis, Williamson	63 min
May 28, 6:26 PM CDT	Special Weather Statement	EWX	Burnet	34 min
May 28, 6:39 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Gillespie	66 min
May 28, 6:46 PM CDT	Areal Flood Advisory	EWX	Travis, Williamson	3 hr

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.