Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 69, NWS Fort Worth, TX

April 9, 2021Cooke County, Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 9, 2021, 8:55 PM CDT for Cooke County, Grayson County, Texas. It was in force for 65 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 9, 2021, 8:55 PM CDT (01:55 UTC)
Expired
Apr 9, 2021, 10:00 PM CDT
In force
65 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
0.88 in
Wind
65.0 mph

Counties Cooke County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 146 km from the middle of the area, began a volume at 01:56 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.

What was reported inside it

TimeReportWhereRemark
Apr 9, 9:10 PM CDTHAIL 0.754 N Denison, TXREPORT FROM MPING: DIME (0.75 IN.).
Apr 9, 9:37 PM CDTTSTM WND DMG6 Ese Denison, TXREPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 1.9 hours before the alert went out and 119 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.

081 
WUUS54 KFWD 100155
SVRFWD
TXC097-181-100300-
/O.NEW.KFWD.SV.W.0069.210410T0155Z-210410T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
855 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...
  Grayson County in north central Texas...

* Until 1000 PM CDT.

* At 854 PM CDT, severe thunderstorms were located along a line
  extending from near Wapanucka to near Thackerville, moving
  southeast at 30 mph.

  HAZARD...65 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Sherman, Denison, Whitesboro, Van Alstyne, Howe, Pottsboro,
  Whitewright, Gunter, Bells, Tom Bean, Callisburg, Knollwood,
  Dorchester, Eisenhower State Park, southern Lake Texoma, Southmayd,
  Sadler and Luella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3396 9691 3387 9688 3387 9680 3382 9676
      3384 9669 3392 9667 3390 9659 3384 9662
      3382 9653 3377 9650 3377 9642 3373 9638
      3340 9639 3340 9662 3372 9713 3382 9705
      3385 9709 3384 9703 3388 9699 3395 9699
TIME...MOT...LOC 0154Z 295DEG 25KT 3437 9637 3373 9712 

HAIL...0.88IN
WIND...65MPH
$$

12
3 follow-up statements
150 
WWUS54 KFWD 100221
SVSFWD

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

TXC097-100230-
/O.CAN.KFWD.SV.W.0069.000000T0000Z-210410T0300Z/
Cooke TX-
921 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COOKE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of 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 3389 9663 3390 9659 3385 9663 3384 9662
      3382 9658 3382 9653 3377 9650 3376 9641
      3373 9638 3340 9639 3340 9662 3361 9695
      3385 9686 3385 9684 3387 9684 3387 9680
      3382 9675 3384 9669 3392 9666
TIME...MOT...LOC 0220Z 298DEG 35KT 3421 9590 3357 9691 

$$

TXC181-100300-
/O.CON.KFWD.SV.W.0069.000000T0000Z-210410T0300Z/
Grayson TX-
921 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR GRAYSON COUNTY...

At 920 PM CDT, severe thunderstorms were located along a line 
extending from near Whitesboro to Colbert, moving southeast at 40 
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Sherman, Denison, Whitesboro, Van Alstyne, Howe, Pottsboro,
Whitewright, Gunter, Bells, Tom Bean, Knollwood, Dorchester,
Eisenhower State Park, southeastern Lake Texoma, Southmayd, Sadler
and Luella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3389 9663 3390 9659 3385 9663 3384 9662
      3382 9658 3382 9653 3377 9650 3376 9641
      3373 9638 3340 9639 3340 9662 3361 9695
      3385 9686 3385 9684 3387 9684 3387 9680
      3382 9675 3384 9669 3392 9666
TIME...MOT...LOC 0220Z 298DEG 35KT 3421 9590 3357 9691 

HAIL...0.75IN
WIND...60MPH
 
$$

Dunn
245 
WWUS54 KFWD 100238
SVSFWD

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

TXC181-100300-
/O.CON.KFWD.SV.W.0069.000000T0000Z-210410T0300Z/
Grayson TX-
938 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR GRAYSON COUNTY...

At 938 PM CDT, severe thunderstorms were located along a line
extending from near Kemp to near Gunter, moving southeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Sherman, Denison, Van Alstyne, Howe, Pottsboro, Whitewright, Gunter,
Bells, Tom Bean, Knollwood, Dorchester, Eisenhower State Park,
southeastern Lake Texoma, Southmayd and Luella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3389 9663 3390 9659 3385 9663 3384 9662
      3382 9658 3382 9653 3377 9650 3376 9641
      3373 9638 3340 9639 3340 9662 3355 9686
      3374 9671 3392 9666
TIME...MOT...LOC 0238Z 318DEG 31KT 3372 9638 3348 9671 

HAIL...<.75IN
WIND...60MPH
 
$$

Dunn
859 
WWUS54 KFWD 100253
SVSFWD

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

TXC181-100300-
/O.CON.KFWD.SV.W.0069.000000T0000Z-210410T0300Z/
Grayson TX-
953 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHEASTERN GRAYSON COUNTY...

At 953 PM CDT, severe thunderstorms were located along a line
extending from near Ravenna to near Van Alstyne, moving southeast at
30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Sherman, Van Alstyne, Howe, Whitewright, Bells, Tom Bean, Dorchester
and Luella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3376 9641 3373 9638 3340 9639 3340 9662
      3349 9675 3366 9658
TIME...MOT...LOC 0253Z 295DEG 25KT 3368 9629 3344 9662 

HAIL...<.75IN
WIND...60MPH
 
$$

Dunn

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, 7:53 PM CDTSevere Thunderstorm WarningFWDCooke, Grayson82 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.