Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 37, NWS Tulsa, OK

October 11, 2021Adair County, Cherokee County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Oct 11, 2021, 12:07 AM CDT for Adair County, Cherokee County, Oklahoma. It was in force for 38 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 11, 2021, 12:07 AM CDT (05:07 UTC)
Expired: Oct 11, 2021, 12:45 AM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Adair County, OK, Cherokee County, OK

The radar

The Western Arkansas radar (KSRX), 79 km from the middle of the area, began a volume at 05:09 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
Oct 10, 9:24 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.1 hours before the alert went out and 132 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2067 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

428 
WFUS54 KTSA 110507
TORTSA
OKC001-021-110545-
/O.NEW.KTSA.TO.W.0037.211011T0507Z-211011T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
1207 AM CDT Mon Oct 11 2021

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Central Adair County in northeastern Oklahoma...
  Southeastern Cherokee County in east central Oklahoma...

* Until 1245 AM CDT.
    
* At 1207 AM CDT, a severe thunderstorm capable of producing a
  tornado was located over Cherokee Landing State Park, moving
  northeast at 50 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations in or near the path include...
  Westville...                      Watts...
  Eldon...                          Proctor...
  Christie...                       Cherokee Landing State Park...
  Baron...                          Maryetta...
  Ballard...                        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3593 9452 3570 9489 3581 9502 3616 9457
      3616 9456
TIME...MOT...LOC 0507Z 226DEG 42KT 3578 9489 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

3 follow-up statements

859 
WWUS54 KTSA 110520
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1220 AM CDT Mon Oct 11 2021

OKC001-021-110545-
/O.CON.KTSA.TO.W.0037.000000T0000Z-211011T0545Z/
Adair OK-Cherokee OK-
1220 AM CDT Mon Oct 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR NORTHERN
ADAIR AND EAST CENTRAL CHEROKEE COUNTIES...
    
At 1220 AM CDT, a severe thunderstorm capable of producing a tornado
was located 4 miles southeast of Eldon, moving northeast at 45 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations in or near the path include...
Westville...                      Watts...
Eldon...                          Proctor...
Christie...                       Baron...
Ballard...                        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3595 9452 3580 9485 3589 9492 3616 9457
      3616 9456
TIME...MOT...LOC 0520Z 219DEG 39KT 3587 9480 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

836 
WWUS54 KTSA 110531
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1231 AM CDT Mon Oct 11 2021

OKC021-110541-
/O.CAN.KTSA.TO.W.0037.000000T0000Z-211011T0545Z/
Cherokee OK-
1231 AM CDT Mon Oct 11 2021

...THE TORNADO WARNING FOR EAST CENTRAL CHEROKEE COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 200 AM CDT for northwestern
Arkansas...and northeastern and east central Oklahoma.

LAT...LON 3598 9453 3587 9479 3598 9480 3616 9457
      3616 9456
TIME...MOT...LOC 0531Z 215DEG 35KT 3596 9474 

$$

OKC001-110545-
/O.CON.KTSA.TO.W.0037.000000T0000Z-211011T0545Z/
Adair OK-
1231 AM CDT Mon Oct 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR NORTHERN
ADAIR COUNTY...
    
At 1231 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Proctor, moving northeast at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations in or near the path include...
Westville...                      Watts...
Proctor...                        Christie...
Ballard...                        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3598 9453 3587 9479 3598 9480 3616 9457
      3616 9456
TIME...MOT...LOC 0531Z 215DEG 35KT 3596 9474 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

804 
WWUS54 KTSA 110538
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1238 AM CDT Mon Oct 11 2021

OKC001-110548-
/O.EXP.KTSA.TO.W.0037.000000T0000Z-211011T0545Z/
Adair OK-
1238 AM CDT Mon Oct 11 2021

...THE TORNADO WARNING FOR NORTHERN ADAIR COUNTY WILL EXPIRE AT 1245
AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds to 50 mph are still possible with this thunderstorm.

A Tornado Watch remains in effect until 200 AM CDT for northwestern
Arkansas...and northeastern and east central Oklahoma.

LAT...LON 3598 9453 3587 9479 3598 9480 3616 9457
      3616 9456
TIME...MOT...LOC 0538Z 226DEG 42KT 3601 9467 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 10, 8:04 PM CDT	Flash Flood Warning	TSA	Osage, Pawnee	4 hr
Oct 10, 8:05 PM CDT	Special Weather Statement	TSA	Pawnee	55 min
Oct 10, 8:21 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	54 min
Oct 10, 8:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	Creek, Okfuskee	64 min
Oct 10, 9:17 PM CDT	Special Weather Statement	TSA	Osage	58 min
Oct 10, 9:28 PM CDT	Tornado Warning	TSA	Creek, Okfuskee	24 min
Oct 10, 9:36 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	Creek, McIntosh, Okfuskee, Okmulgee, Tulsa	54 min
Oct 10, 9:55 PM CDT	Special Weather Statement	TSA	Osage	50 min
Oct 10, 10:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	McIntosh, Pittsburg	59 min
Oct 10, 10:05 PM CDT	Tornado Warning	TSA	Okmulgee, Tulsa, Wagoner	25 min
Oct 10, 10:09 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Tulsa, Washington	36 min
Oct 10, 10:19 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	McIntosh, Muskogee, Okmulgee, Rogers, Tulsa, Wagoner	56 min
Oct 10, 10:21 PM CDT	Tornado Warning	TSA	McIntosh, Pittsburg	39 min
Oct 10, 10:29 PM CDT	Tornado Warning	TSA	Tulsa, Wagoner	46 min
Oct 10, 10:41 PM CDT	Areal Flood Advisory	TSA	Cherokee, Haskell, McIntosh, Muskogee, Okfuskee, Okmulgee and 3 more	3 hr
Oct 10, 10:41 PM CDT	Tornado Warning	TSA	McIntosh, Muskogee, Okmulgee	34 min
Oct 10, 10:43 PM CDT	Tornado Warning	TSA	Wagoner	32 min
Oct 10, 10:53 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Latimer, Pittsburg, Pushmataha	67 min
Oct 10, 10:56 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	Cherokee, Delaware, McIntosh, Mayes, Muskogee, Rogers and 1 more	64 min
Oct 10, 10:58 PM CDT	Tornado Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg	47 min
Oct 10, 11:05 PM CDT	Tornado Warning	TSA	Mayes, Rogers, Wagoner	40 min
Oct 10, 11:33 PM CDT	Tornado Warning	TSA	Cherokee, Muskogee, Sequoyah	42 min
Oct 10, 11:43 PM CDT	Areal Flood Advisory	TSA	Latimer, LeFlore, Pushmataha	70 min
Oct 10, 11:48 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Delaware, Mayes	110 min
Oct 10, 11:55 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Ottawa	50 min
Oct 11, 12:09 AM CDT	Tornado Warning	TSA	Delaware	39 min
Oct 11, 1:18 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	42 min
Oct 11, 1:26 AM CDT	Special Weather Statement	TSA	Creek, Tulsa	49 min
Oct 11, 1:34 AM CDT	Areal Flood Advisory	TSA	Creek, Osage, Pawnee	116 min
Oct 11, 1:37 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	33 min
Oct 11, 2:02 AM CDT	Special Weather Statement	TSA	Rogers, Tulsa, Wagoner, Washington	43 min
Oct 11, 2:09 AM CDT	Special Weather Statement	TSA	Washington	51 min
Oct 11, 2:34 AM CDT	Special Weather Statement	TSA	Craig, Delaware, Mayes, Nowata, Ottawa	56 min
Oct 11, 3:27 AM CDT	Special Weather Statement	TSA	Ottawa	48 min

Nearby

Tornado Warnings in Oklahoma, 2021 Every tornado warning in 2021 Tornadoes 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.