Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Fort Worth, TX

August 14, 2021Henderson County, Texas

NWS Fort Worth, TX issued this special weather statement at Aug 14, 2021, 2:52 PM CDT for Henderson County, Texas. It was in force for 23 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 14, 2021, 2:52 PM CDT (19:52 UTC)
Expired: Aug 14, 2021, 3:15 PM CDT
In force: 23 min
Issued by: NWS Fort Worth, TX
Hail: 0.50 in
Wind: 40

County Henderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 145 km from the middle of the area, began a volume at 19:52 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

Shreveport, LA (KSHV), launched 12:00Z, 7.9 hours before the alert went out and 196 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: 1160 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Fort Worth, TX wrote its last area forecast discussion before this special weather statement went out at Aug 14, 2:37 PM CDT, 15 minutes earlier.

Area forecast discussion, Aug 14, 2:37 PM CDT, 15 minutes before

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Hazardous weather outlook, Aug 14, 2:39 PM CDT, 13 minutes before

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In the hours before

Special weather statement, Aug 14, 12:05 PM CDT, 2 hours 47 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
1205 PM CDT Sat Aug 14 2021

TXZ103-104-119-141745-
Collin TX-Denton TX-Dallas TX-
1205 PM CDT Sat Aug 14 2021

...A strong thunderstorm will impact portions of southeastern Denton,
southwestern Collin and Dallas Counties through 1245 PM CDT...

At 1203 PM CDT, Doppler radar was tracking a strong thunderstorm and
strong thunderstorm outflow winds near an Irving to Frisco line,
moving southeast at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Dallas, Plano, Garland, Irving, Grand Prairie, Mesquite, Carrollton,
Frisco, Richardson, Lewisville, Allen, Rowlett, Desoto, Grapevine,
Cedar Hill, Wylie, Coppell, Duncanville, Lancaster and The Colony.

This includes the following highways...
 Interstate 35E between mile markers 418 and 447.
 Interstate 20 between mile markers 454 and 467.
 Interstate 30 between mile markers 32 and 60.
 Interstate 45 between mile markers 277 and 284.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

Thunderstorm outflow may also extend ahead of the parent showers or
thunderstorms. Gusty and erratic winds may appear suddenly without
lightning, thunder or rain. Get off the water if on Mountain Creek,
White Rock or Joe Pool lakes as strong outflow winds can result in
hazardous boating conditions.

&&

LAT...LON 3298 9652 3271 9662 3256 9704 3298 9703
      3314 9674
TIME...MOT...LOC 1703Z 295DEG 17KT 3282 9692

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

Bain

Special weather statement, Aug 14, 12:45 PM CDT, 2 hours 7 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
1245 PM CDT Sat Aug 14 2021

TXZ119>121-134-141830-
Ellis TX-Kaufman TX-Rockwall TX-Dallas TX-
1245 PM CDT Sat Aug 14 2021

...Significant Weather Advisory for southern Rockwall, northwestern
Kaufman, north central Ellis and Dallas Counties through 130 PM
CDT...

At 1243 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Garland to Hutchins to Cedar Hill.
Movement was east at 25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Dallas, Garland, Grand Prairie, Mesquite, Richardson, Rowlett,
Desoto, Cedar Hill, Duncanville, Rockwall, Lancaster, Waxahachie,
Balch Springs, University Park, Midlothian, Seagoville, Forney, Glenn
Heights, Red Oak and Highland Park.

This includes the following highways...
 Interstate 35E between mile markers 407 and 433.
 Interstate 20 between mile markers 458 and 494.
 Interstate 30 between mile markers 40 and 72.
 Interstate 45 between mile markers 262 and 284.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to minor flooding. Do not drive your vehicle through flooded
roadways.

If on or near Lake Ray Hubbard, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 3258 9638 3245 9672 3255 9704 3293 9681
      3293 9633
TIME...MOT...LOC 1743Z 286DEG 23KT 3286 9666 3265 9670 3257 9697

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Bain

Special weather statement, Aug 14, 1:46 PM CDT, 1 hour 6 minutes before

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Special weather statement, Aug 14, 2:52 PM CDT, 0 minutes before

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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 14, 12:05 PM CDT	Special Weather Statement	FWD	Dallas	40 min
Aug 14, 12:45 PM CDT	Special Weather Statement	FWD	Dallas, Rockwall	45 min
Aug 14, 1:00 PM CDT	Areal Flood Advisory	FWD	Collin, Dallas, Denton, Tarrant	3 hr
Aug 14, 1:33 PM CDT	River Flood Warning	FWD	Dallas	7 hr
Aug 14, 1:46 PM CDT	Special Weather Statement	FWD	Ellis	29 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.