Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 6, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Feb 28, 2021, 10:02 AM CST for Bryan County, Marshall County, Oklahoma. It was in force for 43 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, 10:02 AM CST (16:02 UTC)
- Expired
- Feb 28, 2021, 10:45 AM CST
- In force
- 43 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bryan County, OK, Marshall County, OK
The radar
The Dallas/Ft Worth radar (KFWS), 162 km from the middle of the area, began a volume at 16:04 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 12:00Z, 4.0 hours before the alert went out and 136 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.
876
WUUS54 KOUN 281602
SVROUN
OKC013-095-281645-
/O.NEW.KOUN.SV.W.0006.210228T1602Z-210228T1645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
1002 AM CST Sun Feb 28 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Bryan County in southeastern Oklahoma...
Southeastern Marshall County in southeastern Oklahoma...
* Until 1045 AM CST.
* At 1001 AM CST, a severe thunderstorm was located over southeastern
Lake Texoma, moving northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Durant, Colbert, Caddo, Bokchito, Achille, Kemp, Armstrong,
Hendrix, Cartwright, Blue, Utica, Albany, eastern Lake Texoma,
Calera and Wade.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
If on or near eastern Lake Texoma, get away from the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
15 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 3384 9614 3375 9641 3378 9644 3377 9650
3382 9653 3382 9658 3385 9667 3383 9672
3386 9674 3389 9668 3387 9668 3385 9663
3389 9659 3390 9663 3391 9665 3416 9624
3389 9596
TIME...MOT...LOC 1601Z 243DEG 43KT 3383 9660
HAIL...1.00IN
WIND...60MPH
$$
033 follow-up statements
334
WWUS54 KOUN 281616
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1016 AM CST Sun Feb 28 2021
OKC013-095-281645-
/O.CON.KOUN.SV.W.0006.000000T0000Z-210228T1645Z/
Bryan OK-Marshall OK-
1016 AM CST Sun Feb 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CST
FOR BRYAN AND SOUTHEASTERN MARSHALL COUNTIES...
At 1014 AM CST, a severe thunderstorm was located 4 miles northeast
of Achille, moving northeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Durant, Colbert, Caddo, Bokchito, Achille, Kemp, Armstrong, Hendrix,
Cartwright, Blue, Utica, Albany, eastern Lake Texoma, Calera and
Wade.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3384 9614 3375 9641 3378 9644 3377 9650
3382 9653 3382 9658 3385 9667 3383 9672
3386 9674 3389 9668 3387 9668 3385 9663
3389 9659 3390 9663 3391 9665 3416 9624
3389 9596
TIME...MOT...LOC 1614Z 239DEG 41KT 3388 9633
HAIL...1.00IN
WIND...60MPH
$$
03295
WWUS54 KOUN 281631
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1031 AM CST Sun Feb 28 2021
OKC095-281641-
/O.CAN.KOUN.SV.W.0006.000000T0000Z-210228T1645Z/
Marshall OK-
1031 AM CST Sun Feb 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARSHALL COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3384 9614 3390 9634 3401 9632 3409 9616
3389 9596
TIME...MOT...LOC 1631Z 249DEG 51KT 3396 9603
$$
OKC013-281645-
/O.CON.KOUN.SV.W.0006.000000T0000Z-210228T1645Z/
Bryan OK-
1031 AM CST Sun Feb 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CST
FOR CENTRAL BRYAN COUNTY...
At 1031 AM CST, a severe thunderstorm was located near Bennington,
moving northeast at 55 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Bokchito, Utica, Blue, Albany and Wade.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3384 9614 3390 9634 3401 9632 3409 9616
3389 9596
TIME...MOT...LOC 1631Z 249DEG 51KT 3396 9603
HAIL...1.50IN
WIND...60MPH
$$
03547
WWUS54 KOUN 281641
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1041 AM CST Sun Feb 28 2021
OKC013-281650-
/O.EXP.KOUN.SV.W.0006.000000T0000Z-210228T1645Z/
Bryan OK-
1041 AM CST Sun Feb 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BRYAN COUNTY WILL
EXPIRE AT 1045 AM CST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
Remember, a Severe Thunderstorm Warning still remains in effect for
extreme eastern Bryan County.
LAT...LON 3384 9614 3390 9634 3401 9632 3409 9616
3389 9596
TIME...MOT...LOC 1640Z 243DEG 43KT 3400 9592
$$
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 9:08 PM CST | Dense Fog Advisory | OUN | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 22 more | 8 hr |
| Feb 28, 9:49 AM CST | Special Weather Statement | OUN | Bryan | 41 min |
| Feb 28, 10:29 AM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan | 26 min |
| Feb 28, 10:53 AM CST | Special Weather Statement | OUN | Bryan | 52 min |
| Feb 28, 11:25 AM CST | Special Weather Statement | OUN | Bryan | 20 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.