Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Midland/Odessa, TX

August 20, 2021Jeff Davis County, Texas

NWS Midland/Odessa, TX issued this special weather statement at Aug 20, 2021, 1:21 PM CDT for Jeff Davis County, Texas. It was in force for 39 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: Aug 20, 2021, 1:21 PM CDT (18:21 UTC)
Expired: Aug 20, 2021, 2:00 PM CDT
In force: 39 min
Issued by: NWS Midland/Odessa, TX
Hail: 0.88 in
Wind: 55

County Jeff Davis County, TX

The radar

The Midland/Odessa radar (KMAF), 223 km from the middle of the area, began a volume at 18:21 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

Midland Regional, TX (KMAF), launched 12:00Z, 6.4 hours before the alert went out and 223 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: 385 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

753 
WWUS84 KMAF 201821
SPSMAF

Special Weather Statement
National Weather Service Midland/Odessa TX
121 PM CDT Fri Aug 20 2021
 
TXZ277-201900-
Davis Mountains TX-
121 PM CDT Fri Aug 20 2021

...A strong thunderstorm will impact portions of south central Jeff
Davis County through 200 PM CDT...

At 121 PM CDT, Doppler radar was tracking a strong thunderstorm over
McDonald Observatory, or 8 miles northwest of Fort Davis, moving west
at 5 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel 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...
Fort Davis, McDonald Observatory, Davis Mountains State Park, Black
Mountain, Indian Lodge and Fort Davis National Historical Site.

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.

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.

&&

LAT...LON 3078 10393 3061 10387 3049 10405 3071 10426
TIME...MOT...LOC 1821Z 068DEG 5KT 3065 10402 

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

$$

88

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 7:05 PM CDT	Areal Flood Advisory	MAF	Pecos	3 hr
Aug 19, 7:21 PM CDT	Special Weather Statement	MAF	Brewster	24 min
Aug 19, 7:24 PM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Midland, Reagan	66 min
Aug 19, 8:26 PM CDT	Areal Flood Advisory	MAF	Brewster	5 hr
Aug 20, 1:07 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	113 min
Aug 20, 2:28 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	2 hr
Aug 20, 2:30 PM CDT	Special Weather Statement	MAF	Jeff Davis	45 min
Aug 20, 3:18 PM CDT	Areal Flood Advisory	MAF	Jeff Davis	3 hr
Aug 20, 4:25 PM CDT	Areal Flood Advisory	MAF	Pecos	3 hr
Aug 20, 4:28 PM CDT	Flash Flood Warning	MAF	Presidio	3 hr
Aug 20, 4:47 PM CDT	Flash Flood Warning	MAF	Pecos	3 hr
Aug 20, 6:00 PM CDT	Special Weather Statement	MAF	Crockett	45 min
Aug 20, 6:23 PM CDT	Special Weather Statement	MAF	Scurry	52 min
Aug 20, 6:24 PM CDT	Special Weather Statement	MAF	Andrews	36 min
Aug 20, 6:33 PM CDT	Areal Flood Advisory	MAF	Borden, Scurry	3 hr
Aug 20, 6:44 PM CDT	Areal Flood Advisory	MAF	Crane, Pecos	3 hr

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.