Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Fort Worth, TX
NWS Fort Worth, TX issued this severe thunderstorm warning at Feb 28, 2021, 11:18 AM CST for 4 counties in Texas. It was in force for 57 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
- Feb 28, 2021, 11:18 AM CST (17:18 UTC)
- Expired
- Feb 28, 2021, 12:15 PM CST
- In force
- 57 min
- Issued by
- NWS Fort Worth, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Collin County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 90 km from the middle of the area, began a volume at 17:18 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 28, 10:43 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 5.3 hours before the alert went out and 63 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.
- Mixed-layer CAPE
- 1316 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 3.6
The text
As transmitted.
717
WUUS54 KFWD 281718
SVRFWD
TXC085-097-121-181-281815-
/O.NEW.KFWD.SV.W.0009.210228T1718Z-210228T1815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
1118 AM CST Sun Feb 28 2021
The National Weather Service in Fort Worth has issued a
* Severe Thunderstorm Warning for...
Northwestern Denton County in north central Texas...
Northwestern Collin County in north central Texas...
Southeastern Cooke County in north central Texas...
Southwestern Grayson County in north central Texas...
* Until 1215 PM CST.
* At 1117 AM CST, a severe thunderstorm was located near Krum, or
near Denton, moving northeast at 40 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is possible.
* Locations impacted include...
Denton, Sanger, Whitesboro, Celina, Krum, Pilot Point, Argyle,
Justin, Van Alstyne, Howe, Aubrey, Northlake, Krugerville,
Collinsville, Cross Roads, Gunter, Dorchester, Corral City, Ray
Roberts Park Isle Du Bois and Lake Kiowa.
This includes the following highways...
Interstate 35 between mile markers 468 and 486.
Interstate 35W between mile markers 77 and 85.
Interstate 35E between mile markers 461 and 466.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection get inside a sturdy structure and stay away from
windows.
&&
LAT...LON 3343 9652 3306 9731 3316 9740 3329 9739
3371 9692
TIME...MOT...LOC 1717Z 236DEG 36KT 3321 9724
HAIL...1.00IN
WIND...<50MPH
$$
123 follow-up statements
863
WWUS54 KFWD 281733
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
1133 AM CST Sun Feb 28 2021
TXC085-097-121-181-281815-
/O.CON.KFWD.SV.W.0009.000000T0000Z-210228T1815Z/
Denton TX-Collin TX-Cooke TX-Grayson TX-
1133 AM CST Sun Feb 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CST
FOR NORTHEASTERN DENTON...NORTHWESTERN COLLIN...SOUTHEASTERN COOKE
AND SOUTHWESTERN GRAYSON COUNTIES...
At 1132 AM CST, a severe thunderstorm was located near Aubrey, or 8
miles east of Sanger, moving northeast at 50 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is possible.
Locations impacted include...
Denton, Sanger, Whitesboro, Celina, Pilot Point, Van Alstyne, Howe,
Aubrey, Krugerville, Collinsville, Cross Roads, Gunter, Dorchester,
Ray Roberts Park Isle Du Bois, Ray Roberts Park Johnson Branch, Lake
Kiowa, Tioga and Lincoln Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection stay inside a sturdy structure and keep away from
windows.
&&
LAT...LON 3346 9657 3319 9703 3318 9705 3337 9721
3369 9689 3365 9684
TIME...MOT...LOC 1732Z 236DEG 44KT 3332 9705
HAIL...1.00IN
WIND...<50MPH
$$
12792
WWUS54 KFWD 281758
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
1158 AM CST Sun Feb 28 2021
TXC085-097-121-281807-
/O.CAN.KFWD.SV.W.0009.000000T0000Z-210228T1815Z/
Denton TX-Collin TX-Cooke TX-
1158 AM CST Sun Feb 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DENTON...
NORTHWESTERN COLLIN AND SOUTHEASTERN COOKE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 600 PM CST for
north central Texas.
LAT...LON 3340 9667 3342 9683 3360 9677 3346 9657
TIME...MOT...LOC 1757Z 240DEG 54KT 3346 9668
$$
TXC181-281815-
/O.CON.KFWD.SV.W.0009.000000T0000Z-210228T1815Z/
Grayson TX-
1158 AM CST Sun Feb 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CST
FOR SOUTH CENTRAL GRAYSON COUNTY...
At 1157 AM CST, a severe thunderstorm was located near Gunter, or 11
miles south of Sherman, moving northeast at 60 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is possible.
Locations impacted include...
Van Alstyne, Howe, Gunter and Dorchester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection stay inside a sturdy structure and keep away from
windows.
&&
LAT...LON 3340 9667 3342 9683 3360 9677 3346 9657
TIME...MOT...LOC 1757Z 240DEG 54KT 3346 9668
HAIL...1.00IN
WIND...<50MPH
$$
12035
WWUS54 KFWD 281806
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
1206 PM CST Sun Feb 28 2021
TXC181-281816-
/O.EXP.KFWD.SV.W.0009.000000T0000Z-210228T1815Z/
Grayson TX-
1206 PM CST Sun Feb 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL GRAYSON COUNTY
WILL EXPIRE AT 1215 PM CST...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 600 PM CST for
north central Texas.
LAT...LON 3340 9667 3342 9683 3360 9677 3346 9657
TIME...MOT...LOC 1806Z 236DEG 36KT 3350 9661
$$
12The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 9:11 AM CST | Special Weather Statement | FWD | Cooke | 34 min |
| Feb 28, 9:28 AM CST | Special Weather Statement | FWD | Grayson | 47 min |
| Feb 28, 9:51 AM CST | Severe Thunderstorm Warning | FWD | Grayson | 30 min |
| Feb 28, 11:06 AM CST | Special Weather Statement | FWD | Denton | 24 min |
| Feb 28, 4:34 PM CST | Special Weather Statement | FWD | Hopkins | 26 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.