Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 170, NWS Tulsa, OK

October 13, 2021Adair County, Cherokee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Oct 13, 2021, 9:39 AM CDT for Adair County, Cherokee County, Oklahoma. It was in force for 13 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, 9:39 AM CDT (14:39 UTC)
Expired: Oct 13, 2021, 9:52 AM CDT
In force: 13 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Adair County, OK, Cherokee County, OK

The radar

The Western Arkansas radar (KSRX), 72 km from the middle of the area, began a volume at 14:41 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, 2.7 hours before the alert went out and 162 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.

943 
WUUS54 KTSA 131439
SVRTSA
OKC001-021-131515-
/O.NEW.KTSA.SV.W.0170.211013T1439Z-211013T1515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
939 AM CDT Wed Oct 13 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Adair County in northeastern Oklahoma...
  Southeastern Cherokee County in east central Oklahoma...

* Until 1015 AM CDT.

* At 939 AM CDT, a severe thunderstorm was located 5 miles west of
  Cookson, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations in or near the path include...
  Cookson...                        Cherokee Landing State Park...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3566 9508 3581 9508 3594 9466 3571 9469
TIME...MOT...LOC 1439Z 248DEG 38KT 3574 9501 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lacy

1 follow-up statement

499 
WWUS54 KTSA 131452
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
952 AM CDT Wed Oct 13 2021

OKC001-021-131502-
/O.CAN.KTSA.SV.W.0170.000000T0000Z-211013T1515Z/
Adair OK-Cherokee OK-
952 AM CDT Wed Oct 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ADAIR AND
SOUTHEASTERN CHEROKEE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3566 9508 3581 9508 3594 9466 3571 9469
TIME...MOT...LOC 1450Z 248DEG 38KT 3579 9485 

$$

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, 9:46 AM CDT	Special Weather Statement	TSA	Adair	44 min
Oct 13, 9:49 AM CDT	Special Weather Statement	TSA	Haskell, Sequoyah	41 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

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every 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.