Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Fort Worth, TX

July 11, 2021Cooke County, Grayson County, Montague County, Texas

NWS Fort Worth, TX issued this special weather statement at Jul 11, 2021, 1:27 AM CDT for Cooke County, Grayson County, Montague County, Texas. It was in force for 48 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: Jul 11, 2021, 1:27 AM CDT (06:27 UTC)
Expired: Jul 11, 2021, 2:15 AM CDT
In force: 48 min
Issued by: NWS Fort Worth, TX

Counties Cooke County, TX, Grayson County, TX, Montague County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 139 km from the middle of the area, began a volume at 06:27 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 00:00Z, 6.5 hours before the alert went out and 110 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: 1457 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1695 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 Fort Worth, TX wrote its last area forecast discussion before this special weather statement went out at Jul 10, 7:41 PM CDT, 5 hours 46 minutes earlier.

Area forecast discussion, Jul 10, 7:41 PM CDT, 5 hours 46 minutes before

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</head>
<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Jul 10, 6:18 PM CDT, 7 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service Fort Worth TX
618 PM CDT Sat Jul 10 2021

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-111145-
Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin-
Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas-
Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell-
Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro-
Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone-
Leon-Milam-Robertson-
618 PM CDT Sat Jul 10 2021

This Hazardous Weather Outlook is for North and Central Texas.

.DAY ONE...Tonight.

There is a chance of thunderstorms tonight, mainly along and north of
Interstate 20. Some storms may be severe with damaging wind gusts
being the primary threat.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Thunderstorms remain possible Sunday and Monday, mainly along and
south of Interstate 20. A few storms may become severe with gusty
winds and hail.

Isolated to scattered storms can be expected across Central Texas
Tuesday through Friday.

.SPOTTER INFORMATION STATEMENT...

Formal activation is not expected, but timely reports will be greatly
appreciated.

In the hours before

Special weather statement, Jul 11, 1:10 AM CDT, 17 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
110 AM CDT Sun Jul 11 2021

TXZ093-110630-
Grayson TX-
110 AM CDT Sun Jul 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GRAYSON COUNTY UNTIL 130
AM CDT...

At 110 AM CDT, Doppler radar was tracking a strong thunderstorm over
Willis, or 11 miles south of Madill, moving southeast at 40 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

 Locations impacted include...
Sherman, Denison, Whitesboro, Pottsboro, Knollwood, Eisenhower State
Park, southern Lake Texoma, Southmayd and Sadler.

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. Seek
a safe shelter inside a building or vehicle.

&&

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
north central Texas.

LAT...LON 3387 9689 3385 9686 3387 9681 3386 9678
      3382 9676 3383 9671 3392 9666 3389 9663
      3389 9658 3385 9663 3384 9662 3382 9658
      3382 9653 3377 9650 3378 9643 3373 9638
      3367 9638 3359 9694 3393 9694 3395 9691
TIME...MOT...LOC 0610Z 318DEG 35KT 3393 9682

30

Special weather statement, Jul 11, 1:27 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
127 AM CDT Sun Jul 11 2021

TXZ091>093-110715-
Grayson TX-Cooke TX-Montague TX-
127 AM CDT Sun Jul 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR MONTAGUE...COOKE AND GRAYSON
COUNTIES UNTIL 215 AM CDT...

At 126 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Lake Texoma to near Terral. Movement was
southeast at 30 mph.

Wind gusts up to 50 mph will be possible with these storms.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with these storms.
Seek a safe shelter inside a building or vehicle.

&&

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
north central Texas.

LAT...LON 3390 9758 3392 9749 3382 9738 3392 9721
      3376 9719 3372 9711 3382 9705 3385 9709
      3385 9701 3396 9698 3382 9676 3392 9667
      3390 9659 3384 9662 3373 9638 3340 9639
      3344 9798 3389 9798 3385 9785 3399 9766
TIME...MOT...LOC 0626Z 320DEG 18KT 3385 9670 3383 9799

30

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:38 AM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	52 min
Jul 11, 1:10 AM CDT	Special Weather Statement	FWD	Grayson	20 min
Jul 11, 2:03 AM CDT	Special Weather Statement	FWD	Fannin, Lamar	57 min
Jul 11, 2:13 AM CDT	Special Weather Statement	FWD	Collin, Cooke, Denton, Grayson, Montague, Wise	47 min
Jul 11, 2:32 AM CDT	Special Weather Statement	FWD	Jack, Young	28 min
Jul 11, 2:52 AM CDT	Special Weather Statement	FWD	Collin, Denton, Wise	38 min
Jul 11, 2:56 AM CDT	Special Weather Statement	FWD	Delta, Lamar	34 min
Jul 11, 3:01 AM CDT	Special Weather Statement	FWD	Jack	29 min
Jul 11, 3:43 AM CDT	Special Weather Statement	FWD	Dallas, Tarrant	47 min
Jul 11, 3:59 AM CDT	Special Weather Statement	FWD	Stephens, Young	31 min
Jul 11, 4:24 AM CDT	Special Weather Statement	FWD	Kaufman, Rockwall	36 min
Jul 11, 4:34 AM CDT	Special Weather Statement	FWD	Stephens	56 min
Jul 11, 4:56 AM CDT	Special Weather Statement	FWD	Ellis, Henderson, Kaufman, Navarro, Van Zandt	64 min
Jul 11, 6:01 AM CDT	Areal Flood Advisory	FWD	Ellis, Kaufman	2 hr
Jul 11, 6:32 AM CDT	Special Weather Statement	FWD	Navarro	28 min
Jul 11, 6:56 AM CDT	Special Weather Statement	FWD	Navarro	34 min
Jul 11, 7:31 AM CDT	Special Weather Statement	FWD	Freestone, Limestone, Navarro	29 min
Jul 11, 6:50 PM CDT	Areal Flood Advisory	FWD	Bell, Coryell	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.