Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 174, NWS Austin/San Antonio, TX

June 21, 2021Blanco County, Burnet County, Travis County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jun 21, 2021, 10:35 PM CDT for Blanco County, Burnet County, Travis County, Texas. It was in force for 55 min. 1 report 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: Jun 21, 2021, 10:35 PM CDT (03:35 UTC)
Expired: Jun 21, 2021, 11:30 PM CDT
In force: 55 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, Travis County, TX

The radar

The Ft Hood radar (KGRK), 68 km from the middle of the area, began a volume at 03:36 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
Jun 21, 10:50 PM CDT	TSTM WND DMG	4 Se Marble Falls, TX	THERE WAS WIDESPREAD WIND DAMAGE TO MAINLY TREES REPORTED IN SOUTHERN BURNET COUNTY. A NWS DAMAGE SURVEY HAS CONCLUDED THAT A LARGE SWATH OF SEVERE THUNDERSTORM MICROBURST WINDS MOVED SOUTH TO SOUTHWEST ACROSS THE AREA FROM LAKE MARBLE FALLS TO ACROSS EAST FM

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 3.6 hours before the alert went out and 265 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: 105 J/kg
Mixed-layer CIN: -401 J/kg
Mixed-layer LCL: 999 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

413 
WUUS54 KEWX 220335
SVREWX
TXC031-053-453-220430-
/O.NEW.KEWX.SV.W.0174.210622T0335Z-210622T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
1035 PM CDT Mon Jun 21 2021

The National Weather Service in Austin San Antonio has issued a

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

* Until 1130 PM CDT.

* At 1035 PM CDT, a severe thunderstorm was located near Smithwick,
  or 11 miles south of Bertram, moving south at 25 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...
  Lakeway, Lago Vista, Hudson Bend, The Hills, Spicewood, Cypress
  Mill, Smithwick, Jonestown, Briarcliff and Point Venture.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3067 9802 3063 9805 3061 9804 3062 9801
      3063 9801 3061 9800 3063 9796 3062 9795
      3032 9791 3034 9815 3036 9817 3034 9818
      3035 9830 3072 9817
TIME...MOT...LOC 0335Z 004DEG 20KT 3058 9806 

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

YB

1 follow-up statement

028 
WWUS54 KEWX 220400
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
1100 PM CDT Mon Jun 21 2021

TXC031-053-453-220430-
/O.CON.KEWX.SV.W.0174.000000T0000Z-210622T0430Z/
Travis TX-Blanco TX-Burnet TX-
1100 PM CDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHWESTERN TRAVIS...NORTHEASTERN BLANCO AND SOUTH CENTRAL
BURNET COUNTIES...

At 1059 PM CDT, a severe thunderstorm was located near Lago Vista, or
14 miles southeast of Marble Falls, moving south at 25 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...
Lakeway, Lago Vista, The Hills, Spicewood, Cypress Mill, Smithwick,
Briarcliff and Point Venture.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3061 9809 3058 9800 3057 9799 3034 9796
      3034 9815 3036 9817 3034 9818 3035 9830
      3060 9821
TIME...MOT...LOC 0359Z 004DEG 20KT 3044 9807 

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

YB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 9:12 PM CDT	Special Weather Statement	EWX	Val Verde	48 min
Jun 21, 9:25 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	65 min
Jun 21, 9:43 PM CDT	Special Weather Statement	EWX	Williamson	47 min
Jun 21, 10:25 PM CDT	Special Weather Statement	EWX	Burnet, Llano, Williamson	50 min
Jun 21, 10:51 PM CDT	Tornado Warning	EWX	Blanco, Burnet, Hays	24 min
Jun 21, 10:52 PM CDT	Areal Flood Advisory	EWX	Burnet, Williamson	3 hr
Jun 21, 11:08 PM CDT	Areal Flood Advisory	EWX	Val Verde	3 hr
Jun 21, 11:13 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie, Hays, Llano	62 min
Jun 21, 11:31 PM CDT	Areal Flood Advisory	EWX	Burnet, Travis, Williamson	3 hr
Jun 21, 11:53 PM CDT	Special Weather Statement	EWX	Gillespie	52 min
Jun 22, 12:00 AM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Llano	3 hr
Jun 22, 12:09 AM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr	39 min
Jun 22, 12:19 AM CDT	Special Weather Statement	EWX	Travis	41 min
Jun 22, 12:24 AM CDT	Special Weather Statement	EWX	Edwards	51 min
Jun 22, 12:30 AM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
Jun 22, 12:47 AM CDT	Special Weather Statement	EWX	Bandera	43 min
Jun 22, 1:16 AM CDT	Special Weather Statement	EWX	Bandera, Medina, Real, Uvalde	44 min
Jun 22, 1:54 AM CDT	Special Weather Statement	EWX	Kinney	51 min
Jun 22, 2:08 AM CDT	Areal Flood Advisory	EWX	Edwards, Real	5 hr
Jun 22, 2:23 AM CDT	Special Weather Statement	EWX	Fayette	52 min
Jun 22, 2:52 AM CDT	Areal Flood Advisory	EWX	Edwards, Kinney, Uvalde, Val Verde	4 hr
Jun 22, 3:01 AM CDT	Special Weather Statement	EWX	Kinney	44 min
Jun 22, 3:13 AM CDT	Special Weather Statement	EWX	Fayette	47 min
Jun 22, 4:00 AM CDT	Special Weather Statement	EWX	Gonzales	45 min
Jun 22, 4:33 AM CDT	Special Weather Statement	EWX	DeWitt, Gonzales	42 min
Jun 22, 5:22 AM CDT	Areal Flood Advisory	EWX	Bexar	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.