Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Austin/San Antonio, TX

April 23, 2021Maverick County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Apr 23, 2021, 4:15 PM CDT for Maverick County, Texas. It was in force for 30 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: Apr 23, 2021, 4:15 PM CDT (21:15 UTC)
Expired: Apr 23, 2021, 4:45 PM CDT
In force: 30 min
Issued by: NWS Austin/San Antonio, TX

County Maverick County, TX

The radar

The Laughlin AFB radar (KDFX), 52 km from the middle of the area, began a volume at 21:16 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 12:00Z, 9.3 hours before the alert went out and 62 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: 618 J/kg
Mixed-layer CIN: -183 J/kg
Mixed-layer LCL: 561 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

104 
WWUS84 KEWX 232115
SPSEWX

Special Weather Statement
National Weather Service Austin/San Antonio TX
415 PM CDT Fri Apr 23 2021
 
TXZ217-232145-
Maverick TX-
415 PM CDT Fri Apr 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MAVERICK COUNTY
UNTIL 445 PM CDT...

At 415 PM CDT, Doppler radar was tracking a strong thunderstorm near
Normandy, or near Quemado, moving east at 40 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Quemado, Paloma, Radar Base, Normandy, Darling, Siesta Acres, Elm
Creek, Fabrica and Seco Mines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent 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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2876 10053 2882 10055 2883 10058 2885 10057
      2888 10060 2889 10059 2891 10062 2890 10063
      2892 10063 2894 10065 2897 10065 2905 10033
      2870 10032
TIME...MOT...LOC 2115Z 273DEG 34KT 2886 10067 

$$

BRADY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 12:19 PM CDT	Special Weather Statement	EWX	Comal	41 min
Apr 23, 12:59 PM CDT	Special Weather Statement	EWX	Hays	31 min
Apr 23, 1:17 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Guadalupe	23 min
Apr 23, 1:31 PM CDT	Areal Flood Advisory	EWX	Caldwell, Guadalupe	3 hr
Apr 23, 1:43 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Travis	25 min
Apr 23, 2:03 PM CDT	Areal Flood Advisory	EWX	Bastrop, Travis	3 hr
Apr 23, 3:29 PM CDT	Areal Flood Advisory	EWX	Bastrop, Lee	3 hr
Apr 23, 4:39 PM CDT	Severe Thunderstorm Warning	EWX	Maverick, Zavala	51 min
Apr 23, 5:25 PM CDT	Special Weather Statement	EWX	Zavala	50 min
Apr 23, 6:05 PM CDT	Special Weather Statement	EWX	Frio	55 min
Apr 23, 6:29 PM CDT	Special Weather Statement	EWX	Bexar	61 min
Apr 23, 6:45 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe	45 min
Apr 23, 6:52 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Frio	53 min
Apr 23, 6:59 PM CDT	Special Weather Statement	EWX	Atascosa	61 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.