Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 26, NWS Norman, OK

October 10, 2021Cleveland County, McClain County, Oklahoma

NWS Norman, OK issued this tornado warning at Oct 10, 2021, 7:43 PM CDT for Cleveland County, McClain County, Oklahoma. It was in force for 47 min. 8 reports 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: Oct 10, 2021, 7:43 PM CDT (00:43 UTC)
Expired: Oct 10, 2021, 8:30 PM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

Counties Cleveland County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 17 km from the middle of the area, began a volume at 00:43 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
Oct 10, 7:48 PM CDT	HAIL 1	Newcastle, OK	AT US-62 AND FOX LANE.
Oct 10, 7:51 PM CDT	HAIL 1	Goldsby, OK
Oct 10, 7:57 PM CDT	HAIL 1	1 Nne Noble, OK
Oct 10, 7:57 PM CDT	HAIL 1.75	3 Se Goldsby, OK
Oct 10, 8:02 PM CDT	HAIL 1.5	2 E Noble, OK
Oct 10, 8:04 PM CDT	HAIL 3	2 E Norman, OK
Oct 10, 8:05 PM CDT	HAIL 2	2 Nw Norman, OK
Oct 10, 8:06 PM CDT	HAIL 2.75	5 Ne Norman, 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
Oct 10, 3:22 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 2 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: 1436 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1199 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

As transmitted.

792 
WFUS54 KOUN 110043
TOROUN
OKC027-087-110130-
/O.NEW.KOUN.TO.W.0026.211011T0043Z-211011T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
743 PM CDT Sun Oct 10 2021

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Northern Cleveland County in central Oklahoma...
  West central McClain County in central Oklahoma...

* Until 830 PM CDT.
    
* At 742 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Blanchard, moving east-northeast at 35 mph.

  HAZARD...Tornado and tennis ball size hail.

  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 impacted include...
  Far southeastern Oklahoma City, Norman, southeastern Moore, 
  Newcastle, Blanchard, Noble, Goldsby, Cole, Etowah, Stella, Lake 
  Thunderbird and Little Axe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room 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 3510 9767 3523 9767 3538 9719 3537 9715
      3513 9714 3513 9723
TIME...MOT...LOC 0042Z 255DEG 30KT 3517 9762 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.50 IN

$$

..speg.

3 follow-up statements

979 
WWUS54 KOUN 110056
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
756 PM CDT Sun Oct 10 2021

OKC027-087-110130-
/O.CON.KOUN.TO.W.0026.000000T0000Z-211011T0130Z/
Cleveland OK-McClain OK-
756 PM CDT Sun Oct 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHERN
CLEVELAND AND WEST CENTRAL MCCLAIN COUNTIES...
    
At 755 PM CDT, a severe thunderstorm capable of producing a tornado 
was located 4 miles northwest of Goldsby, moving east-northeast at 
25 mph.

HAZARD...Tornado and tennis ball size hail.

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 impacted include...
Far Southeastern Oklahoma City, Norman, southeastern Moore, 
Newcastle, northern Noble, Goldsby, Stella, Lake Thunderbird and 
Little Axe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room, 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 3515 9756 3522 9759 3531 9743 3538 9719
      3537 9715 3515 9714
TIME...MOT...LOC 0055Z 252DEG 22KT 3520 9752 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.50 IN

$$

..speg.

322 
WWUS54 KOUN 110111
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
811 PM CDT Sun Oct 10 2021

OKC087-110117-
/O.CAN.KOUN.TO.W.0026.000000T0000Z-211011T0130Z/
McClain OK-
811 PM CDT Sun Oct 10 2021

...THE TORNADO WARNING FOR WEST CENTRAL MCCLAIN COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved into 
Cleveland County. Therefore, the tornado warning has been cancelled 
for McClain County.

LAT...LON 3518 9741 3525 9742 3531 9735 3536 9719
      3537 9715 3518 9714
TIME...MOT...LOC 0107Z 247DEG 36KT 3523 9734 

$$

OKC027-110130-
/O.CON.KOUN.TO.W.0026.000000T0000Z-211011T0130Z/
Cleveland OK-
811 PM CDT Sun Oct 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHEASTERN CLEVELAND COUNTY...
    
At 807 PM CDT, a severe thunderstorm capable of producing a tornado
was located over southeastern Norman, or 4 miles west of Lake 
Thunderbird, moving east-northeast at 40 mph. Power flashes have 
been reported with this storm indicating this storm is producing a 
tornado or damaging winds in east Norman and approaching Lake 
Thunderbird.

HAZARD...Tornado and tennis ball size hail.

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 impacted include...
Far southeastern Oklahoma City, eastern Norman, Stella, Lake 
Thunderbird and Little Axe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room, 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 3518 9741 3525 9742 3531 9735 3536 9719
      3537 9715 3518 9714
TIME...MOT...LOC 0107Z 247DEG 36KT 3523 9734 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.50 IN

$$

..speg.

146 
WWUS54 KOUN 110126
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
826 PM CDT Sun Oct 10 2021

OKC027-110134-
/O.EXP.KOUN.TO.W.0026.000000T0000Z-211011T0130Z/
Cleveland OK-
826 PM CDT Sun Oct 10 2021

...THE TORNADO WARNING FOR NORTHEASTERN CLEVELAND COUNTY WILL EXPIRE
AT 830 PM CDT...
                
The rotation which prompted the warning has weakened, and no longer 
appears capable of producing a tornado. Therefore, the Tornado 
Warning will be allowed to expire. However, a Severe Thunderstorm 
Warning still remains in effect for the area.

LAT...LON 3518 9741 3525 9742 3531 9735 3536 9719
      3537 9715 3518 9714
TIME...MOT...LOC 0124Z 255DEG 30KT 3526 9719 

$$

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 10, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady	43 min
Oct 10, 7:05 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	40 min
Oct 10, 7:18 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble, Payne	42 min
Oct 10, 7:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	51 min
Oct 10, 7:25 PM CDT	Flash Flood Warning	OUN	Caddo, Canadian, Cleveland, Grady, McClain, Oklahoma	107 min
Oct 10, 7:33 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Cotton, Garvin, Jefferson, Stephens	42 min
Oct 10, 7:47 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love	28 min
Oct 10, 8:14 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	46 min
Oct 10, 8:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie, Seminole	59 min
Oct 10, 8:17 PM CDT	Areal Flood Advisory	OUN	Kay, Noble	3 hr
Oct 10, 8:22 PM CDT	Tornado Warning	OUN	Lincoln, Oklahoma	23 min
Oct 10, 8:43 PM CDT	Tornado Warning	OUN	Lincoln	25 min
Oct 10, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Carter, Johnston, Love, Marshall	52 min
Oct 10, 8:56 PM CDT	Tornado Warning Tornado observed	OUN	Lincoln, Pottawatomie, Seminole	34 min
Oct 10, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Coal, Garvin, Johnston, Murray, Pontotoc and 1 more	46 min
Oct 10, 9:03 PM CDT	Areal Flood Advisory	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole	3 hr
Oct 10, 9:17 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Lincoln, Payne, Pontotoc, Pottawatomie, Seminole	43 min
Oct 10, 9:43 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	47 min
Oct 10, 9:45 PM CDT	Areal Flood Advisory	OUN	Cleveland, Lincoln, Logan, McClain, Oklahoma, Pottawatomie	3 hr
Oct 10, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	45 min
Oct 10, 10:20 PM CDT	Tornado Warning	OUN	Hughes	25 min
Oct 10, 10:30 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal	45 min
Oct 10, 11:02 PM CDT	Special Weather Statement	OUN	Caddo	28 min
Oct 10, 11:25 PM CDT	Special Weather Statement	OUN	Grady	35 min
Oct 11, 12:14 AM CDT	Special Weather Statement	OUN	Cleveland, Logan, Oklahoma	31 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.