Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 52, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 10:33 PM CDT for Crawford County, Franklin County, Sebastian County, Arkansas; LeFlore County, Sequoyah County, Oklahoma. It was in force for 42 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, 10:33 PM CDT (03:33 UTC)
- Expired
- Apr 9, 2021, 11:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR, LeFlore County, OK, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 25 km from the middle of the area, began a volume at 03:35 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 |
|---|---|---|---|
| Apr 9, 8:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 9, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 3.6 hours before the alert went out and 199 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
- 9 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1268 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
153
WUUS54 KTSA 100333
SVRTSA
ARC033-047-131-OKC079-135-100415-
/O.NEW.KTSA.SV.W.0052.210410T0333Z-210410T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1033 PM CDT Fri Apr 9 2021
The National Weather Service in Tulsa has issued a
* Severe Thunderstorm Warning for...
Southern Franklin County in west central Arkansas...
Southwestern Crawford County in northwestern Arkansas...
Sebastian County in west central Arkansas...
Southeastern Sequoyah County in east central Oklahoma...
Eastern Le Flore County in southeastern Oklahoma...
* Until 1115 PM CDT.
* At 1033 PM CDT, severe thunderstorms were located along a line
extending from 3 miles northeast of Spiro to 7 miles south of
Bokoshe to 7 miles southeast of Heavener, moving east at 40 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 in or near the path include...
Fort Smith... Poteau...
Charleston... Greenwood...
Barling... Pocola...
Muldrow... Heavener...
Roland... Lavaca...
Spiro... Arkoma...
Panama... Wister...
Hackett... Howe...
Hartford... Huntington...
Bonanza... Bokoshe...
This includes the following highways,
Interstate 40 in Oklahoma between mile markers 319 and 324.
Interstate 540 between mile markers 6 and 14.
LAT...LON 3537 9374 3537 9381 3531 9381 3532 9392
3523 9392 3523 9403 3514 9403 3514 9414
3510 9414 3507 9425 3506 9423 3497 9424
3495 9434 3496 9437 3493 9445 3467 9446
3470 9472 3508 9488 3542 9459 3538 9371
TIME...MOT...LOC 0333Z 278DEG 37KT 3528 9457 3507 9481 3479 9455
HAIL...1.00IN
WIND...60MPH
$$2 follow-up statements
831
WWUS54 KTSA 100349
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
1049 PM CDT Fri Apr 9 2021
OKC135-100358-
/O.CAN.KTSA.SV.W.0052.000000T0000Z-210410T0415Z/
Sequoyah OK-
1049 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SEQUOYAH COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area therefore the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southeastern and east central Oklahoma. A Severe Thunderstorm Watch
also remains in effect until 200 AM CDT for northwestern and west
central Arkansas.
LAT...LON 3537 9374 3537 9381 3531 9381 3532 9392
3523 9392 3523 9403 3514 9403 3514 9414
3510 9414 3507 9425 3506 9423 3497 9424
3495 9434 3496 9437 3493 9445 3483 9445
3494 9465 3510 9473 3541 9436 3538 9371
TIME...MOT...LOC 0348Z 269DEG 36KT 3525 9420 3508 9464 3493 9447
$$
ARC033-047-131-OKC079-100415-
/O.CON.KTSA.SV.W.0052.000000T0000Z-210410T0415Z/
Franklin AR-Crawford AR-Sebastian AR-Le Flore OK-
1049 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR SOUTHERN FRANKLIN...SOUTH CENTRAL CRAWFORD...SEBASTIAN AND
NORTHEASTERN LE FLORE COUNTIES...
At 1048 PM CDT, severe thunderstorms were located along a line
extending from 3 miles northeast of Greenwood to 2 miles northwest of
Poteau to 6 miles east of Heavener Runestone State Park, moving east
at 40 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 in or near the path include...
Fort Smith... Van Buren...
Poteau... Charleston...
Greenwood... Barling...
Pocola... Lavaca...
Arkoma... Hackett...
Howe... Hartford...
Huntington... Bonanza...
Branch... Midland...
Cameron... Excelsior...
Fort Smith Regional Airport... Bloomer...
This includes Interstate 540 between mile markers 6 and 14.
LAT...LON 3537 9374 3537 9381 3531 9381 3532 9392
3523 9392 3523 9403 3514 9403 3514 9414
3510 9414 3507 9425 3506 9423 3497 9424
3495 9434 3496 9437 3493 9445 3483 9445
3494 9465 3510 9473 3541 9436 3538 9371
TIME...MOT...LOC 0348Z 269DEG 36KT 3525 9420 3508 9464 3493 9447
HAIL...1.00IN
WIND...60MPH
$$633
WWUS54 KTSA 100415
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
1115 PM CDT Fri Apr 9 2021
ARC033-047-131-OKC079-100425-
/O.EXP.KTSA.SV.W.0052.000000T0000Z-210410T0415Z/
Franklin AR-Crawford AR-Sebastian AR-Le Flore OK-
1115 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FRANKLIN...SOUTH
CENTRAL CRAWFORD...SEBASTIAN AND NORTHEASTERN LE FLORE COUNTIES HAS
EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore the warning has been allowed to expire. However gusty
winds are still possible across far southeast Sebastian county with
these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
northwestern and west central Arkansas.
LAT...LON 3537 9374 3537 9381 3531 9381 3532 9392
3523 9392 3523 9403 3514 9403 3514 9414
3510 9414 3507 9425 3506 9423 3497 9424
3495 9434 3496 9437 3493 9445 3483 9445
3494 9465 3510 9473 3541 9436 3538 9371
TIME...MOT...LOC 0415Z 277DEG 30KT 3521 9390 3502 9424 3489 9417
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 8:02 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 29 min |
| Apr 9, 9:00 PM CDT | Special Weather Statement | TSA | Benton, Washington | 30 min |
| Apr 9, 9:27 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Washington | 48 min |
| Apr 9, 10:07 PM CDT | Severe Thunderstorm Warning | TSA | Carroll, Madison | 23 min |
| Apr 9, 10:12 PM CDT | Special Weather Statement | TSA | Crawford, Franklin, Sebastian | 33 min |
| Apr 9, 7:02 PM CDT | Special Weather Statement | TSA | Rogers | 28 min |
| Apr 9, 7:09 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 51 min |
| Apr 9, 7:12 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 48 min |
| Apr 9, 7:24 PM CDT | Special Weather Statement | TSA | Tulsa | 36 min |
| Apr 9, 7:29 PM CDT | Special Weather Statement | TSA | Ottawa | 31 min |
| Apr 9, 7:38 PM CDT | Special Weather Statement | TSA | Craig, Nowata | 37 min |
| Apr 9, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Muskogee, Okmulgee, Rogers, Tulsa, Wagoner | 52 min |
| Apr 9, 7:41 PM CDT | Tornado Warning | TSA | Creek, Tulsa | 20 min |
| Apr 9, 7:52 PM CDT | Special Weather Statement | TSA | Cherokee, Mayes | 23 min |
| Apr 9, 7:56 PM CDT | Special Weather Statement | TSA | Okfuskee | 34 min |
| Apr 9, 8:28 PM CDT | Special Weather Statement | TSA | Cherokee, Mayes | 32 min |
| Apr 9, 8:29 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 46 min |
| Apr 9, 8:49 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 41 min |
| Apr 9, 8:59 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 50 min |
| Apr 9, 9:03 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, McIntosh, Muskogee, Sequoyah | 42 min |
| Apr 9, 9:24 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 66 min |
| Apr 9, 9:30 PM CDT | Special Weather Statement | TSA | Muskogee | 30 min |
| Apr 9, 9:35 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 55 min |
| Apr 9, 9:37 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Muskogee, Sequoyah | 38 min |
| Apr 9, 9:58 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, LeFlore, Pushmataha | 47 min |
| Apr 9, 10:24 PM CDT | Special Weather Statement | TSA | LeFlore | 36 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2021Severe 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.