Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

October 13, 2021Haskell County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Oct 13, 2021, 9:49 AM CDT for Haskell County, Sequoyah County, Oklahoma. It was in force for 41 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: Oct 13, 2021, 9:49 AM CDT (14:49 UTC)
Expired: Oct 13, 2021, 10:30 AM CDT
In force: 41 min
Issued by: NWS Tulsa, OK
Hail: 0.00 in
Wind: 40

Counties Haskell County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 42 km from the middle of the area, began a volume at 14:53 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

Springfield, MO (KSGF), launched 12:00Z, 2.8 hours before the alert went out and 193 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 722 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 440 m²/s²
0-3 km storm-relative helicity: 590 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

729 
WWUS84 KTSA 131449
SPSTSA

Special Weather Statement
National Weather Service Tulsa OK
949 AM CDT Wed Oct 13 2021
 
OKZ068>070-072-074-076-131530-
Haskell OK-Adair OK-Muskogee OK-Sequoyah OK-Cherokee OK-Le Flore OK-
949 AM CDT Wed Oct 13 2021

...Strong thunderstorms will impact portions of Haskell, Sequoyah,
southern Adair, northwestern Le Flore, southeastern Cherokee and
southeastern Muskogee Counties through 1030 AM CDT...

At 949 AM CDT, Doppler radar indicated strong thunderstorms along a
line extending from 4 miles southwest of Cookson to 3 miles north of
Lequire. Movement was east at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations in or near the path include...
Sallisaw...                       Stigler...
Muldrow...                        Spiro...
Vian...                           Panama...
Gore...                           Webbers Falls...
Keota...                          Mccurtain...
Bokoshe...                        Whitefield...
Gans...                           Kinta...
Marble City...                    Tamaha...
Brushy...                         Mc Curtain...
Brushy Lake State Park...         Bunch...

This includes Interstate 40 in Oklahoma between mile markers 286 and
320.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3516 9461 3511 9529 3565 9508 3577 9450
TIME...MOT...LOC 1449Z 250DEG 28KT 3566 9495 3515 9512 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Lacy

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 13, 4:48 AM CDT	Special Weather Statement	TSA	Osage	42 min
Oct 13, 5:27 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	48 min
Oct 13, 6:03 AM CDT	Special Weather Statement	TSA	Creek, Osage, Washington	42 min
Oct 13, 6:39 AM CDT	Special Weather Statement	TSA	Creek, Nowata, Tulsa, Washington	66 min
Oct 13, 6:48 AM CDT	Special Weather Statement	TSA	Okfuskee	57 min
Oct 13, 7:29 AM CDT	Special Weather Statement	TSA	Craig	46 min
Oct 13, 7:34 AM CDT	Special Weather Statement	TSA	Okmulgee, Rogers, Tulsa	41 min
Oct 13, 8:08 AM CDT	Special Weather Statement	TSA	Mayes, Rogers	52 min
Oct 13, 8:15 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	45 min
Oct 13, 8:18 AM CDT	Special Weather Statement	TSA	Craig, Ottawa	42 min
Oct 13, 8:42 AM CDT	Special Weather Statement	TSA	Muskogee, Wagoner	48 min
Oct 13, 8:48 AM CDT	Special Weather Statement	TSA	Mayes	42 min
Oct 13, 8:52 AM CDT	Special Weather Statement	TSA	McIntosh	23 min
Oct 13, 9:10 AM CDT	Special Weather Statement	TSA	Haskell	50 min
Oct 13, 9:17 AM CDT	Special Weather Statement	TSA	Cherokee	28 min
Oct 13, 9:21 AM CDT	Special Weather Statement	TSA	Cherokee, Delaware	24 min
Oct 13, 9:39 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	13 min
Oct 13, 9:46 AM CDT	Special Weather Statement	TSA	Adair	44 min
Oct 13, 10:22 AM CDT	Special Weather Statement	TSA	Sequoyah	38 min
Oct 13, 3:39 PM CDT	Special Weather Statement	TSA	Choctaw, Pushmataha	66 min
Oct 13, 4:19 PM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, LeFlore, Pushmataha	3 hr
Oct 13, 4:22 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	32 min
Oct 13, 4:51 PM CDT	Special Weather Statement	TSA	Latimer, LeFlore	39 min
Oct 13, 4:57 PM CDT	Special Weather Statement	TSA	Pushmataha	63 min
Oct 13, 5:45 PM CDT	Areal Flood Advisory	TSA	Haskell, LeFlore, Sequoyah	3 hr
Oct 13, 5:24 PM CDT	Special Weather Statement	TSA	Sebastian	51 min
Oct 13, 6:01 PM CDT	Tornado Warning	TSA	Franklin, Sebastian	44 min

Nearby

Special Weather Statements in Oklahoma, 2021 Every special weather statement 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.