Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Austin/San Antonio, TX

March 22, 2021Blanco County, Gillespie County, Llano County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Mar 22, 2021, 9:02 PM CDT for Blanco County, Gillespie County, Llano County, Texas. It was in force for 43 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: Mar 22, 2021, 9:02 PM CDT (02:02 UTC)
Expired: Mar 22, 2021, 9:45 PM CDT
In force: 43 min
Issued by: NWS Austin/San Antonio, TX

Counties Blanco County, TX, Gillespie County, TX, Llano County, TX

The radar

The Austin/San Antonio radar (KEWX), 121 km from the middle of the area, began a volume at 02:05 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 nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.0 hours before the alert went out and 241 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: 1091 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 1422 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

492 
WWUS84 KEWX 230202
SPSEWX

Special Weather Statement
National Weather Service Austin/San Antonio TX
902 PM CDT Mon Mar 22 2021
 
TXZ171-172-188-190-230245-
Blanco TX-Gillespie TX-Llano TX-Burnet TX-
902 PM CDT Mon Mar 22 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BLANCO...
GILLESPIE...LLANO AND SOUTHWESTERN BURNET COUNTIES UNTIL 945 PM
CDT...

At 902 PM CDT, Doppler radar was tracking a strong thunderstorm near
Doss, or 17 miles south of Mason, moving east at 65 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Fredericksburg, Burnet, Marble Falls, Kingsland, Llano, Round
Mountain, Buchanan Dam, Gainesville, Granite Shoals, Horseshoe Bay,
Johnson City, Meadowlakes, Stonewall, Highland Haven, Castell, Inks
Lake State Park, Blowout, Rocky Creek, Hye and Crabapple.

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

LAT...LON 3077 9810 3022 9837 3026 9930 3046 9930
      3050 9925 3050 9897 3070 9896 3075 9890
      3074 9866 3076 9856
TIME...MOT...LOC 0202Z 262DEG 57KT 3050 9914 

$$

EW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 22, 8:32 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	58 min
Mar 22, 9:14 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano, Williamson	61 min
Mar 22, 9:16 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie, Llano	59 min
Mar 22, 9:58 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	62 min
Mar 22, 10:05 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Blanco, Comal, Kendall, Kerr	55 min
Mar 22, 10:11 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Gillespie, Hays, Travis	64 min
Mar 22, 10:26 PM CDT	Tornado Warning	EWX	Williamson	27 min
Mar 22, 10:34 PM CDT	Special Weather Statement	EWX	Gillespie	41 min
Mar 22, 10:56 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	41 min
Mar 22, 10:57 PM CDT	Special Weather Statement	EWX	Comal, Hays, Kendall	48 min
Mar 22, 11:02 PM CDT	Special Weather Statement	EWX	Travis	58 min
Mar 22, 11:31 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Medina, Real, Uvalde	59 min
Mar 22, 11:34 PM CDT	Special Weather Statement	EWX	Bandera, Kendall, Kerr	41 min
Mar 22, 11:44 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kendall, Kerr, Medina	61 min
Mar 22, 11:55 PM CDT	Special Weather Statement	EWX	Bastrop	65 min
Mar 23, 12:25 AM CDT	Special Weather Statement	EWX	Lee	65 min
Mar 23, 12:25 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Uvalde	65 min
Mar 23, 12:35 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Blanco, Comal, Hays, Kendall and 1 more	55 min
Mar 23, 1:06 AM CDT	Tornado Warning	EWX	Comal, Guadalupe, Hays	24 min
Mar 23, 1:13 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Comal, Guadalupe, Kendall, Medina and 1 more	62 min
Mar 23, 1:19 AM CDT	Special Weather Statement	EWX	Medina	41 min
Mar 23, 1:26 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Comal, Gonzales, Guadalupe, Hays and 1 more	64 min
Mar 23, 1:48 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Medina	34 min
Mar 23, 1:58 AM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Guadalupe	32 min
Mar 23, 2:13 AM CDT	Severe Thunderstorm Warning	EWX	Bexar, Gonzales, Guadalupe, Karnes, Wilson	26 min
Mar 23, 2:16 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Fayette, Gonzales, Guadalupe, Lavaca and 1 more	59 min
Mar 23, 3:03 AM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lavaca	33 min
Mar 23, 3:43 AM CDT	Special Weather Statement	EWX	DeWitt, Lavaca	47 min
Mar 23, 4:07 AM CDT	Severe Thunderstorm Warning	EWX	Lavaca	38 min

Nearby

Special Weather Statements in Texas, 2021 Every special weather statement 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.