Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS San Angelo, TX

October 13, 2021Callahan County, Texas

NWS San Angelo, TX issued this special weather statement at Oct 13, 2021, 2:20 PM CDT for Callahan County, Texas. It was in force for 40 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: Oct 13, 2021, 2:20 PM CDT (19:20 UTC)
Expired: Oct 13, 2021, 3:00 PM CDT
In force: 40 min
Issued by: NWS San Angelo, TX
Hail: 0.25 in
Wind: 40

County Callahan County, TX

The radar

The Dyess AFB radar (KDYX), 33 km from the middle of the area, began a volume at 19:19 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.3 hours before the alert went out and 205 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: 756 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 377 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this special weather statement went out at Oct 13, 12:37 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, Oct 13, 12:37 PM CDT, 1 hour 43 minutes before

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Hazardous weather outlook, Oct 13, 4:03 AM CDT, 10 hours 17 minutes before

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In the hours before

Special weather statement, Oct 13, 11:16 AM CDT, 3 hours 4 minutes before

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Special weather statement, Oct 13, 2:20 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service San Angelo TX
220 PM CDT Wed Oct 13 2021

TXZ128-132000-
Callahan TX-
220 PM CDT Wed Oct 13 2021

...A strong thunderstorm will impact portions of Callahan County
through 300 PM CDT...

At 219 PM CDT, Doppler radar was tracking a strong thunderstorm near
Dudley, moving northeast at 40 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Baird, Putnam, Rowden, Admiral and Us-283 Near The Callahan-
Shackelford County Line.

This includes Interstate 20 between Mile Markers 303 and 322.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3208 9935 3208 9940 3219 9963 3222 9963
      3252 9937 3251 9911 3240 9911
TIME...MOT...LOC 1919Z 217DEG 35KT 3222 9951

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 13, 11:16 AM CDT	Special Weather Statement	SJT	Crockett	44 min
Oct 13, 11:44 AM CDT	Areal Flood Advisory	SJT	Crockett	3 hr
Oct 13, 1:26 PM CDT	Areal Flood Advisory	SJT	Coke, Irion, Sterling, Tom Green	3 hr
Oct 13, 1:39 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Tom Green	3 hr
Oct 13, 2:07 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Coke, Runnels, Taylor	113 min
Oct 13, 2:32 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Crockett	3 hr
Oct 13, 3:18 PM CDT	Areal Flood Advisory	SJT	Callahan, Coleman	3 hr
Oct 13, 3:26 PM CDT	Areal Flood Advisory	SJT	Schleicher, Sutton	3 hr
Oct 13, 4:08 PM CDT	Areal Flood Advisory	SJT	Concho, Runnels, Tom Green	3 hr
Oct 13, 4:32 PM CDT	Areal Flood Advisory	SJT	Kimble, Menard, Schleicher, Sutton	3 hr
Oct 13, 4:44 PM CDT	Areal Flood Advisory	SJT	Coleman, McCulloch	3 hr
Oct 13, 5:22 PM CDT	Areal Flood Advisory	SJT	Brown	3 hr
Oct 13, 5:55 PM CDT	Special Weather Statement	SJT	Mason	65 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.