Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Austin/San Antonio, TX

March 23, 2021DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Mar 23, 2021, 3:43 AM CDT for DeWitt County, Lavaca County, Texas. It was in force for 47 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 23, 2021, 3:43 AM CDT (08:43 UTC)
Expired: Mar 23, 2021, 4:30 AM CDT
In force: 47 min
Issued by: NWS Austin/San Antonio, TX

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 114 km from the middle of the area, began a volume at 08:42 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

Corpus Christi, TX (KCRP), launched 00:00Z, 8.7 hours before the alert went out and 169 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: 59 J/kg
Mixed-layer CIN: -468 J/kg
Mixed-layer LCL: 699 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 235 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

934 
WWUS84 KEWX 230843
SPSEWX

Special Weather Statement
National Weather Service Austin/San Antonio TX
343 AM CDT Tue Mar 23 2021
 
TXZ224-225-230930-
Lavaca TX-De Witt TX-
343 AM CDT Tue Mar 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DEWITT AND LAVACA
COUNTIES UNTIL 430 AM CDT...

At 342 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Hallettsville to near Cuero. Movement was east
at 40 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Cuero, Yoakum, Hallettsville, Shiner, Ezzell, Sublime, Speaks,
Komensky, Worthing, Koerth, Edgar, Terryville, Breslau, Mont, Sweet
Home, Witting, Vsetin, Mount Olive, Vienna and Wied.

LAT...LON 2906 9694 2910 9698 2902 9710 2902 9748
      2958 9709 2958 9679 2934 9656
TIME...MOT...LOC 0842Z 266DEG 36KT 2944 9696 2909 9733 

$$

RUNYEN

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, 9:02 PM CDT	Special Weather Statement	EWX	Blanco, Gillespie, Llano	43 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, 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.