Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Austin/San Antonio, TX

March 25, 2021Travis County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Mar 25, 2021, 3:49 AM CDT for Travis County, Texas. It was in force for 41 min. 14 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: Mar 25, 2021, 3:49 AM CDT (08:49 UTC)
Expired: Mar 25, 2021, 4:30 AM CDT
In force: 41 min
Issued by: NWS Austin/San Antonio, TX

County Travis County, TX

What was reported inside it

Time	Report	Where	Remark
Mar 25, 4:08 AM CDT	HAIL 0.75	Tanglewood Forest, TX
Mar 25, 4:11 AM CDT	HAIL 1	2 Ese Sunset Valley, TX
Mar 25, 4:12 AM CDT	HAIL 0.7	West Lake Hills, TX
Mar 25, 4:15 AM CDT	HAIL 0.25	3 Ne West Lake Hills, TX	QUARTER INCH HAIL OCCURRED AT KATT AUSTIN CAMP MABRY FOR APPROXIMATELY 5 MINUTES FROM 415 TO 420 AM.
Mar 25, 4:15 AM CDT	HAIL 0.75	1 Ssw Austin, TX	PENNY SIZE HAIL TO THE SOUTH OF AUSTIN. TIME ESTIMATED BY RADAR.
Mar 25, 4:17 AM CDT	HAIL 1	1 N Austin, TX	1 INCH DIAMETER HAIL FALLING NEAR THE KXAN STUDIO.
Mar 25, 4:17 AM CDT	HAIL 1.25	1 N Austin, TX	SOCIAL MEDIA PICTURE OF 1.25 INCH DIAMETER HAIL AT INTERSECTION OF SPEEDWAY AND 31ST STREET.
Mar 25, 4:20 AM CDT	HAIL 0.88	2 Nnw Austin, TX	NICKEL SIZE HAIL FALLING ON THE NNW SIDE OF AUSTIN.
Mar 25, 4:21 AM CDT	HAIL 2	4 Ne Austin, TX	2 INCH HAIL STONE MEASURED IN NE AUSTIN VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
Mar 25, 4:21 AM CDT	HAIL 2	6 W Manor, TX	COCORAHS OBSERVER MEASURED HAIL RANGING FROM 1.5 TO 2 INCHES IN DIAMETER.
Mar 25, 4:23 AM CDT	HAIL 1.25	3 Ne Austin, TX	TRAINED SPOTTER MEASURED HAIL OF 1.25 INCH IN DIAMETER.
Mar 25, 4:27 AM CDT	HAIL 1.5	6 Wsw Manor, TX	PHOTO OF PING PONG SIZE HAIL VIA SOCIAL MEDIA.
Mar 25, 4:28 AM CDT	HAIL 2	5 S Pflugerville, TX	PICTURES OF SEVERAL 2 INCH HAIL STONES AT INTERSECTION OF SAMSUNG BLVD AND PARMER LANE. TIME ESTIMATED BY RADAR.
Mar 25, 4:32 AM CDT	HAIL 1.75	5 Nne Austin, TX	GOLF BALL SIZE HAIL NEAR THE INTERSECTION OF I-35 AND HWY 183 IN THE ST. JOHNS AREA VIA SOCIAL MEDIA PICTURE.

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

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 8.8 hours before the alert went out and 297 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: 963 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 808 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: -36 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -2.8

Open this sounding in Storm Lab

The text

As transmitted.

045 
WWUS84 KEWX 250849
SPSEWX

Special Weather Statement
National Weather Service Austin/San Antonio TX
349 AM CDT Thu Mar 25 2021
 
TXZ192-250930-
Travis TX-
349 AM CDT Thu Mar 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL TRAVIS COUNTY UNTIL 430
AM CDT...

At 349 AM CDT, Doppler radar was tracking a strong thunderstorm over
Dripping Springs, moving northeast at 50 mph.

Half inch hail will be possible with this storm.

Locations impacted include...
Austin, Round Rock, Pflugerville, Tanglewood Forest, Windemere,
Anderson Mill, Austin Bergstrom Int Airport, Lakeway, Manor, Bee
Cave, West Lake Hills, Hudson Bend, The Hills, Rollingwood, Bear
Creek, Barton Creek, Shady Hollow, Mansfield Dam, Hornsby Bend and
Sunset Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
Occasional cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3029 9745 3014 9787 3028 9807 3030 9808
      3046 9783 3045 9781 3043 9776 3045 9774
      3046 9769 3048 9768 3048 9764
TIME...MOT...LOC 0849Z 242DEG 42KT 3016 9809 

$$

RUNYEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 8:24 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	47 min
Mar 24, 10:19 PM CDT	Special Weather Statement	EWX	Edwards	41 min
Mar 24, 10:29 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	61 min
Mar 24, 11:06 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real, Val Verde	54 min
Mar 24, 11:27 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	63 min
Mar 24, 11:51 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	54 min
Mar 24, 11:59 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	46 min
Mar 25, 12:44 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kinney, Real, Uvalde	61 min
Mar 25, 1:44 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kendall, Kerr, Medina, Real, Uvalde	61 min
Mar 25, 2:44 AM CDT	Special Weather Statement	EWX	Kendall	46 min
Mar 25, 3:24 AM CDT	Special Weather Statement	EWX	Blanco	36 min
Mar 25, 4:17 AM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.