Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 552, NWS Norman, OK

October 26, 2021Harmon County, Jackson County, Tillman County, Oklahoma; Hardeman County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Oct 26, 2021, 9:22 PM CDT for Harmon County, Jackson County, Tillman County, Oklahoma; Hardeman County, Wilbarger County, Texas. 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 26, 2021, 9:22 PM CDT (02:22 UTC)
Expired: Oct 26, 2021, 10:00 PM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

Counties Harmon County, OK, Jackson County, OK, Tillman County, OK, Hardeman County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 46 km from the middle of the area, began a volume at 02:25 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 26, 7:23 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 192 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: 791 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 277 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

537 
WUUS54 KOUN 270222
SVROUN
OKC057-065-141-TXC197-487-270300-
/O.NEW.KOUN.SV.W.0552.211027T0222Z-211027T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
922 PM CDT Tue Oct 26 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Jackson County in southwestern Oklahoma...
  Northwestern Tillman County in southwestern Oklahoma...
  Southeastern Harmon County in southwestern Oklahoma...
  Northwestern Wilbarger County in northern Texas...
  Central Hardeman County in northern Texas...

* Until 1000 PM CDT.

* At 922 PM CDT, a severe thunderstorm was located 5 miles northeast
  of Quanah, moving northeast at 55 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Altus, Quanah, Tipton, Blair, Olustee, Eldorado, Manitou, Martha,
  Elmer, Headrick, Friendship, Altus Air Force Base, Duke, Humphreys
  and Hess.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3473 9947 3472 9944 3475 9944 3479 9937
      3465 9909 3464 9910 3464 9908 3453 9887
      3425 9983 3443 9993
TIME...MOT...LOC 0222Z 238DEG 48KT 3437 9970 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Bunker

2 follow-up statements

160 
WWUS54 KOUN 270236
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
936 PM CDT Tue Oct 26 2021

OKC057-270246-
/O.CAN.KOUN.SV.W.0552.000000T0000Z-211027T0300Z/
Harmon OK-
936 PM CDT Tue Oct 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HARMON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3451 9974 3451 9967 3457 9967 3473 9948
      3472 9944 3475 9944 3479 9937 3465 9909
      3464 9910 3464 9908 3453 9887 3433 9956
      3449 9976
TIME...MOT...LOC 0236Z 238DEG 48KT 3447 9951 

$$

OKC065-141-TXC197-487-270300-
/O.CON.KOUN.SV.W.0552.000000T0000Z-211027T0300Z/
Jackson OK-Tillman OK-Wilbarger TX-Hardeman TX-
936 PM CDT Tue Oct 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR JACKSON...NORTHWESTERN TILLMAN...NORTHWESTERN WILBARGER AND EAST
CENTRAL HARDEMAN COUNTIES...

At 936 PM CDT, a severe thunderstorm was located 7 miles southwest of
Olustee, moving northeast at 55 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Altus, Tipton, Blair, Olustee, Eldorado, Manitou, Martha, Elmer,
Headrick, Friendship, Altus Air Force Base, Humphreys and Hess.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3451 9974 3451 9967 3457 9967 3473 9948
      3472 9944 3475 9944 3479 9937 3465 9909
      3464 9910 3464 9908 3453 9887 3433 9956
      3449 9976
TIME...MOT...LOC 0236Z 238DEG 48KT 3447 9951 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Bunker

678 
WWUS54 KOUN 270250
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
950 PM CDT Tue Oct 26 2021

TXC197-270259-
/O.CAN.KOUN.SV.W.0552.000000T0000Z-211027T0300Z/
Hardeman TX-
950 PM CDT Tue Oct 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HARDEMAN COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3460 9963 3473 9948 3472 9944 3475 9944
      3479 9937 3465 9909 3464 9910 3464 9908
      3453 9887 3438 9943 3448 9951
TIME...MOT...LOC 0249Z 238DEG 48KT 3457 9932 

$$

OKC065-141-TXC487-270300-
/O.CON.KOUN.SV.W.0552.000000T0000Z-211027T0300Z/
Jackson OK-Tillman OK-Wilbarger TX-
950 PM CDT Tue Oct 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR CENTRAL JACKSON...NORTHWESTERN TILLMAN AND NORTHWESTERN WILBARGER
COUNTIES...

At 949 PM CDT, a severe thunderstorm was located 4 miles west of
Humphreys, moving northeast at 55 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Altus, Tipton, Blair, Olustee, Manitou, Martha, Elmer, Headrick,
Friendship, Altus Air Force Base, Humphreys and Hess.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms.

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

&&

LAT...LON 3460 9963 3473 9948 3472 9944 3475 9944
      3479 9937 3465 9909 3464 9910 3464 9908
      3453 9887 3438 9943 3448 9951
TIME...MOT...LOC 0249Z 238DEG 48KT 3457 9932 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Bunker

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 26, 7:01 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	18 min
Oct 26, 7:06 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	39 min
Oct 26, 7:22 PM CDT	Special Weather Statement	OUN	Ellis	38 min
Oct 26, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	48 min
Oct 26, 7:55 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	35 min
Oct 26, 7:57 PM CDT	Special Weather Statement	OUN	Woodward	33 min
Oct 26, 8:05 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	40 min
Oct 26, 8:07 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	38 min
Oct 26, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	16 min
Oct 26, 8:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Custer, Dewey, Ellis, Harper, Major, Roger Mills and 2 more	49 min
Oct 26, 9:10 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OUN	Jackson, Tillman	65 min
Oct 26, 9:31 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Alfalfa, Dewey, Major, Woods, Woodward	44 min
Oct 26, 9:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Comanche, Greer, Jackson, Kiowa, Tillman	46 min
Oct 26, 10:11 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	22 min
Oct 26, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	33 min
Oct 26, 10:38 PM CDT	Special Weather Statement	OUN	Woods	37 min
Oct 26, 10:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Kiowa, Tillman, Washita	63 min
Oct 26, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	35 min
Oct 26, 11:08 PM CDT	Special Weather Statement	OUN	Alfalfa	37 min
Oct 26, 11:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Caddo, Canadian, Comanche, Garvin, Grady, McClain and 1 more	38 min
Oct 26, 11:36 PM CDT	Special Weather Statement	OUN	Blaine, Kingfisher	24 min
Oct 26, 11:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Blaine, Canadian, Cleveland, Garvin, Grady, Kingfisher and 3 more	53 min
Oct 26, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	52 min
Oct 27, 12:11 AM CDT	Special Weather Statement	OUN	Garfield	34 min
Oct 27, 12:36 AM CDT	Tornado Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	24 min
Oct 27, 12:43 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Cleveland, Garvin, Lincoln, Logan, McClain, Oklahoma and 4 more	47 min
Oct 27, 1:27 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Garvin, Hughes, Lincoln, McClain, Payne and 3 more	27 min
Oct 27, 2:28 AM CDT	Wind Advisory	OUN	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more	17 hr
Oct 27, 1:38 PM CDT	Wind Advisory	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more	31 hr
Oct 26, 8:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Foard, Hardeman, Knox	78 min
Oct 26, 10:06 PM CDT	Special Weather Statement	OUN	Baylor, Knox	24 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Severe Thunderstorm Warnings in Texas, 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.