Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Fort Worth, TX

April 9, 2021Cooke County, Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 9, 2021, 7:53 PM CDT for Cooke County, Grayson County, Texas. It was in force for 82 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
Apr 9, 2021, 7:53 PM CDT (00:53 UTC)
Expired
Apr 9, 2021, 9:15 PM CDT
In force
82 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
2.0 in
Wind
60.0 mph

Counties Cooke County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 150 km from the middle of the area, began a volume at 00:53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 9, 4:27 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.9 hours before the alert went out and 123 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-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2021-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3129 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2021-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3129 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1600 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.7
Supercell composite
11.7

Open this sounding in Storm Lab

The text

As transmitted.

106 
WUUS54 KFWD 100053
SVRFWD
TXC097-181-100215-
/O.NEW.KFWD.SV.W.0064.210410T0053Z-210410T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
753 PM CDT Fri Apr 9 2021

The National Weather Service in Fort Worth has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cooke County in north central Texas...
  Northwestern Grayson County in north central Texas...

* Until 915 PM CDT.

* At 752 PM CDT, a severe thunderstorm was located near Lake Murray,
  or 7 miles northeast of Marietta, moving southeast at 15 mph.

  HAZARD...Two inch hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Whitesboro, Pottsboro, Eisenhower State Park, southern Lake Texoma
  and Sadler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection get inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3387 9689 3385 9685 3387 9683 3387 9680
      3382 9675 3384 9669 3392 9667 3389 9663
      3389 9658 3385 9663 3383 9660 3369 9668
      3364 9694 3384 9703 3389 9698 3395 9700
      3395 9699 3394 9697 3396 9691
TIME...MOT...LOC 0052Z 318DEG 13KT 3401 9703 

HAIL...2.00IN
WIND...60MPH
$$

12
1 follow-up statement
572 
WWUS54 KFWD 100127
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
827 PM CDT Fri Apr 9 2021

TXC097-100136-
/O.CAN.KFWD.SV.W.0064.000000T0000Z-210410T0215Z/
Cooke TX-
827 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COOKE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved away 
from the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central Texas.

LAT...LON 3387 9689 3385 9686 3385 9684 3387 9683
      3387 9680 3383 9677 3382 9675 3384 9669
      3392 9667 3389 9663 3389 9658 3385 9663
      3382 9660 3369 9668 3383 9694 3395 9694
      3396 9691
TIME...MOT...LOC 0126Z 292DEG 13KT 3393 9690 

$$

TXC181-100215-
/O.CON.KFWD.SV.W.0064.000000T0000Z-210410T0215Z/
Grayson TX-
827 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN GRAYSON COUNTY...

At 826 PM CDT, a severe thunderstorm was located over southwestern
Lake Texoma, or 12 miles east of Marietta, moving east at 15 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Pottsboro, Eisenhower State Park and southern Lake Texoma. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection stay inside a sturdy structure and keep away from
windows.

&&

LAT...LON 3387 9689 3385 9686 3385 9684 3387 9683
      3387 9680 3383 9677 3382 9675 3384 9669
      3392 9667 3389 9663 3389 9658 3385 9663
      3382 9660 3369 9668 3383 9694 3395 9694
      3396 9691
TIME...MOT...LOC 0126Z 292DEG 13KT 3393 9690 

HAIL...1.25IN
WIND...60MPH
 
$$

12

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 7:01 PM CDTSevere Thunderstorm WarningFWDDallas44 min
Apr 9, 7:27 PM CDTSevere Thunderstorm WarningFWDEllis, Hill, Navarro63 min
Apr 9, 7:41 PM CDTSevere Thunderstorm WarningFWDDallas, Hunt, Kaufman, Rockwall49 min
Apr 9, 7:59 PM CDTSevere Thunderstorm WarningFWDDallas49 min
Apr 9, 8:08 PM CDTSevere Thunderstorm WarningFWDNavarro82 min
Apr 9, 8:31 PM CDTSevere Thunderstorm WarningFWDDallas, Kaufman, Rockwall30 min
Apr 9, 8:36 PM CDTSevere Thunderstorm WarningFWDAnderson, Henderson, Van Zandt54 min
Apr 9, 8:55 PM CDTSevere Thunderstorm WarningFWDCooke, Grayson65 min
Apr 9, 9:04 PM CDTSevere Thunderstorm WarningFWDAnderson71 min
Apr 9, 9:42 PM CDTSevere Thunderstorm WarningFWDFannin, Lamar78 min
Apr 9, 10:00 PM CDTSevere Thunderstorm WarningFWDAnderson, Freestone, Leon75 min
Apr 9, 10:33 PM CDTSpecial Weather StatementFWDDelta, Hopkins, Hunt42 min
Apr 9, 10:43 PM CDTSevere Thunderstorm WarningFWDDelta, Hopkins, Hunt46 min
Apr 9, 11:24 PM CDTSevere Thunderstorm WarningFWDRains, Van Zandt47 min
Apr 9, 11:40 PM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman, Van Zandt63 min
Apr 10, 12:22 AM CDTSpecial Weather StatementFWDAnderson53 min
Apr 10, 1:15 AM CDTSpecial Weather StatementFWDLeon45 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning 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.