Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 83, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 9, 2021, 9:15 PM CDT for Atoka County, Bryan County, Marshall County, Oklahoma. It was in force for 60 min. 1 report 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, 9:15 PM CDT (02:15 UTC)
- Expired
- Apr 9, 2021, 10:15 PM CDT
- In force
- 60 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Atoka County, OK, Bryan County, OK, Marshall County, OK
The radar
The Norman radar (KTLX), 179 km from the middle of the area, began a volume at 02:18 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 9, 9:29 PM CDT | HAIL 1 | Durant, OK |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 9, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 2.3 hours before the alert went out and 176 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
- 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
The text
As transmitted.
262
WUUS54 KOUN 100215
SVROUN
OKC005-013-095-100315-
/O.NEW.KOUN.SV.W.0083.210410T0215Z-210410T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
915 PM CDT Fri Apr 9 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...
Eastern Atoka County in southeastern Oklahoma...
* Until 1015 PM CDT.
* At 915 PM CDT, severe thunderstorms were located along a line
extending from 7 miles northwest of Daisy to near Caney to 6 miles
west of Pottsboro, moving southeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Durant, Colbert, Caddo, Bokchito, Achille, Bennington, Kemp,
Armstrong, Hendrix, Cartwright, Blue, Lane, Utica, Daisy, Albany,
eastern Lake Texoma, Calera, Wade, Bentley and McGee Creek Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3451 9567 3451 9578 3416 9578 3416 9598
3394 9594 3385 9576 3383 9584 3389 9593
3384 9614 3376 9618 3377 9629 3369 9635
3378 9643 3385 9663 3389 9659 3390 9664
3391 9662 3423 9612 3460 9579 3459 9567
TIME...MOT...LOC 0215Z 300DEG 31KT 3459 9586 3425 9617 3380 9677
HAIL...0.75IN
WIND...60MPH
$$
Mahale4 follow-up statements
938
WWUS54 KOUN 100228
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
928 PM CDT Fri Apr 9 2021
OKC095-100237-
/O.CAN.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Marshall OK-
928 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARSHALL COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3451 9567 3451 9578 3416 9578 3416 9598
3394 9594 3385 9576 3386 9581 3383 9584
3389 9593 3384 9614 3376 9618 3377 9629
3369 9635 3378 9643 3385 9663 3388 9659
3392 9656 3423 9612 3459 9577 3459 9567
TIME...MOT...LOC 0227Z 299DEG 31KT 3454 9576 3420 9607 3380 9659
$$
OKC005-013-100315-
/O.CON.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Bryan OK-Atoka OK-
928 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR BRYAN AND SOUTHEASTERN ATOKA COUNTIES...
At 927 PM CDT, severe thunderstorms were located along a line
extending from near Daisy to 8 miles southwest of Lane to near
Eisenhower State Park, moving southeast at 35 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, Bennington, Kemp,
Armstrong, Hendrix, Cartwright, Blue, Lane, Utica, Daisy, Albany,
eastern Lake Texoma, Calera, Wade, Bentley and McGee Creek Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3451 9567 3451 9578 3416 9578 3416 9598
3394 9594 3385 9576 3386 9581 3383 9584
3389 9593 3384 9614 3376 9618 3377 9629
3369 9635 3378 9643 3385 9663 3388 9659
3392 9656 3423 9612 3459 9577 3459 9567
TIME...MOT...LOC 0227Z 299DEG 31KT 3454 9576 3420 9607 3380 9659
HAIL...1.00IN
WIND...60MPH
$$
Mahale924
WWUS54 KOUN 100245
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
945 PM CDT Fri Apr 9 2021
OKC005-013-100315-
/O.CON.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Bryan OK-Atoka OK-
945 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR CENTRAL BRYAN AND SOUTHEASTERN ATOKA COUNTIES...
At 945 PM CDT, severe thunderstorms were located along a line
extending from near Moyers to near Boswell to near Bells, moving
southeast at 30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Achille, Bennington, Kemp, Hendrix, Utica, Albany, Wade, Darwin and
southeastern McGee Creek Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3416 9578 3416 9598 3394 9594 3385 9576
3386 9581 3383 9584 3389 9593 3384 9614
3376 9618 3377 9629 3369 9635 3378 9643
3380 9649 3386 9647 3403 9610 3417 9603
3434 9586 3435 9578
TIME...MOT...LOC 0245Z 315DEG 27KT 3430 9562 3400 9590 3360 9642
HAIL...1.00IN
WIND...70MPH
$$
Mahale315
WWUS54 KOUN 100259
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
959 PM CDT Fri Apr 9 2021
OKC005-100308-
/O.CAN.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Atoka OK-
959 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ATOKA COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3370 9634 3373 9639 3374 9640 3393 9609
3403 9596 3394 9594 3391 9589 3390 9589
3386 9582 3386 9581 3383 9584 3389 9593
3384 9614 3376 9618 3377 9629
TIME...MOT...LOC 0258Z 318DEG 24KT 3395 9589 3384 9605 3371 9627
$$
OKC013-100315-
/O.CON.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Bryan OK-
959 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR CENTRAL BRYAN COUNTY...
At 958 PM CDT, severe thunderstorms were located along a line
extending from 5 miles south of Boswell to 7 miles east of Albany to
3 miles northwest of Ravenna, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Kemp, Albany and Wade.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3370 9634 3373 9639 3374 9640 3393 9609
3403 9596 3394 9594 3391 9589 3390 9589
3386 9582 3386 9581 3383 9584 3389 9593
3384 9614 3376 9618 3377 9629
TIME...MOT...LOC 0258Z 318DEG 24KT 3395 9589 3384 9605 3371 9627
HAIL...0.75IN
WIND...60MPH
$$
Mahale251
WWUS54 KOUN 100305
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1005 PM CDT Fri Apr 9 2021
OKC013-100315-
/O.EXP.KOUN.SV.W.0083.000000T0000Z-210410T0315Z/
Bryan OK-
1005 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BRYAN COUNTY WILL
EXPIRE AT 1015 PM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3370 9634 3373 9639 3374 9640 3393 9609
3403 9596 3394 9594 3391 9589 3390 9589
3386 9582 3386 9581 3383 9584 3389 9593
3384 9614 3376 9618 3377 9629
TIME...MOT...LOC 0305Z 300DEG 31KT 3392 9583 3381 9599 3368 9621
$$
MahaleThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:08 PM CDT | Severe Thunderstorm Warning | OUN | McClain, Pontotoc, Pottawatomie, Seminole | 52 min |
| Apr 9, 7:27 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain, Pontotoc, Pottawatomie, Seminole | 33 min |
| Apr 9, 7:35 PM CDT | Special Weather Statement | OUN | Marshall | 25 min |
| Apr 9, 7:36 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Love, Marshall | 39 min |
| Apr 9, 7:39 PM CDT | Severe Thunderstorm Warning | OUN | Hughes, Seminole | 51 min |
| Apr 9, 7:51 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes, Johnston, Murray, Pontotoc, Seminole | 54 min |
| Apr 9, 8:07 PM CDT | Severe Thunderstorm Warning | OUN | Love, Marshall | 53 min |
| Apr 9, 8:11 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Coal, Johnston, Marshall, Murray, Pontotoc | 34 min |
| Apr 9, 8:38 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Coal, Hughes, Johnston, Marshall | 67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.