Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Norman, OK

January 25, 20217 counties in Oklahoma; Clay County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Jan 25, 2021, 1:01 AM CST for 7 counties in Oklahoma; Clay County, Texas. It was in force for 44 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: Jan 25, 2021, 1:01 AM CST (07:01 UTC)
Expired: Jan 25, 2021, 1:45 AM CST
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Stephens County, OK, Clay County, TX

The radar

The Altus AFB radar (KFDR), 88 km from the middle of the area, began a volume at 07:04 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

Norman, OK (KOUN), launched 00:00Z, 7.0 hours before the alert went out and 118 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: 612 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 395 m²/s²
0-3 km storm-relative helicity: 763 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted.

002 
WUUS54 KOUN 250701
SVROUN
OKC019-031-033-049-051-067-137-TXC077-250745-
/O.NEW.KOUN.SV.W.0004.210125T0701Z-210125T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
101 AM CST Mon Jan 25 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Comanche County in southwestern Oklahoma...
  Northern Jefferson County in southern Oklahoma...
  Southwestern Garvin County in southern Oklahoma...
  Southeastern Grady County in central Oklahoma...
  Stephens County in southern Oklahoma...
  Cotton County in southwestern Oklahoma...
  Northwestern Carter County in southern Oklahoma...
  Northwestern Clay County in northern Texas...

* Until 145 AM CST.

* At 101 AM CST, severe thunderstorms were located along a line
  extending from 4 miles southwest of Geronimo to 4 miles southeast
  of Temple to 3 miles southwest of Petrolia, moving northeast at 65
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Duncan, Marlow, Walters, Waurika, Healdton, Comanche, Geronimo,
  Bray, Ringling, Temple, Petrolia, Velma, Byers, Dean, Foster,
  Tatums, Hastings, Loco, Ratliff City and Addington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3392 9835 3416 9836 3440 9857 3486 9766
      3456 9739 3421 9747
TIME...MOT...LOC 0701Z 241DEG 55KT 3443 9841 3422 9820 3397 9827 

HAIL...1.00IN
WIND...60MPH
 
$$

Mahale

2 follow-up statements

274 
WWUS54 KOUN 250716
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
116 AM CST Mon Jan 25 2021

TXC077-250725-
/O.CAN.KOUN.SV.W.0004.000000T0000Z-210125T0745Z/
Clay TX-
116 AM CST Mon Jan 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLAY COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3403 9810 3404 9808 3405 9810 3410 9811
      3413 9809 3413 9810 3415 9810 3416 9812
      3432 9816 3451 9836 3486 9766 3456 9739
      3421 9747 3401 9808
TIME...MOT...LOC 0715Z 268DEG 58KT 3457 9817 3432 9792 3407 9799 

$$

OKC019-031-033-049-051-067-137-250745-
/O.CON.KOUN.SV.W.0004.000000T0000Z-210125T0745Z/
Comanche OK-Jefferson OK-Garvin OK-Grady OK-Stephens OK-Cotton OK-
Carter OK-
116 AM CST Mon Jan 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CST
FOR SOUTHEASTERN COMANCHE...NORTHERN JEFFERSON...SOUTHWESTERN
GARVIN...SOUTHEASTERN GRADY...STEPHENS...NORTHEASTERN COTTON AND
NORTHWESTERN CARTER COUNTIES...

At 115 AM CST, severe thunderstorms were located along a line
extending from 11 miles west of Duncan to 4 miles southeast of
Comanche to near Sugden, moving east at 65 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Duncan, Marlow, Waurika, Healdton, Comanche, Bray, Ringling, Velma,
Foster, Tatums, Hastings, Loco, Ratliff City, Addington, Sugden,
Waurika Lake, Corum, Central High, Empire City and Cornish.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3403 9810 3404 9808 3405 9810 3410 9811
      3413 9809 3413 9810 3415 9810 3416 9812
      3432 9816 3451 9836 3486 9766 3456 9739
      3421 9747 3401 9808
TIME...MOT...LOC 0715Z 268DEG 58KT 3457 9817 3432 9792 3407 9799 

HAIL...1.00IN
WIND...60MPH
 
$$

Mahale

791 
WWUS54 KOUN 250730
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
130 AM CST Mon Jan 25 2021

OKC031-033-250739-
/O.CAN.KOUN.SV.W.0004.000000T0000Z-210125T0745Z/
Comanche OK-Cotton OK-
130 AM CST Mon Jan 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COMANCHE AND
NORTHEASTERN COTTON COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3408 9785 3417 9791 3438 9784 3465 9808
      3486 9766 3456 9739 3421 9747
TIME...MOT...LOC 0729Z 240DEG 57KT 3468 9792 3443 9767 3418 9774 

$$

OKC019-049-051-067-137-250745-
/O.CON.KOUN.SV.W.0004.000000T0000Z-210125T0745Z/
Jefferson OK-Garvin OK-Grady OK-Stephens OK-Carter OK-
130 AM CST Mon Jan 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CST
FOR NORTHEASTERN JEFFERSON...SOUTHWESTERN GARVIN...SOUTHEASTERN
GRADY...STEPHENS AND NORTHWESTERN CARTER COUNTIES...

At 129 AM CST, severe thunderstorms were located along a line
extending from 3 miles northeast of Marlow to near Velma to 8 miles
west of Ringling, moving northeast at 65 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Duncan, Marlow, Healdton, Bray, Ringling, Velma, Foster, Tatums,
Loco, Ratliff City, Central High, Cornish, Fox, Pernell and Cox City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3408 9785 3417 9791 3438 9784 3465 9808
      3486 9766 3456 9739 3421 9747
TIME...MOT...LOC 0729Z 240DEG 57KT 3468 9792 3443 9767 3418 9774 

HAIL...1.00IN
WIND...60MPH
 
$$

Mahale

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 24, 10:10 PM CST	Special Weather Statement	OUN	Washita	35 min
Jan 24, 10:28 PM CST	Special Weather Statement	OUN	Blaine	32 min
Jan 24, 10:56 PM CST	Special Weather Statement	OUN	Blaine	34 min
Jan 24, 11:41 PM CST	Special Weather Statement	OUN	Washita	34 min
Jan 25, 12:09 AM CST	Severe Thunderstorm Warning	OUN	Tillman	51 min
Jan 25, 12:31 AM CST	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	44 min
Jan 25, 12:38 AM CST	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	37 min
Jan 25, 1:43 AM CST	Special Weather Statement	OUN	Carter, Garvin, Murray	32 min
Jan 25, 2:26 AM CST	Special Weather Statement	OUN	Hughes, Murray, Pontotoc, Seminole	49 min
Jan 25, 3:39 AM CST	Special Weather Statement	OUN	Coal, Johnston, Marshall	51 min
Jan 25, 4:51 AM CST	Special Weather Statement	OUN	Atoka, Bryan	39 min
Jan 25, 4:58 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Bryan	47 min
Jan 24, 11:13 PM CST	Special Weather Statement	OUN	Knox	32 min
Jan 24, 11:38 PM CST	Special Weather Statement	OUN	Knox	37 min
Jan 24, 11:55 PM CST	Special Weather Statement	OUN	Baylor	35 min
Jan 25, 1:38 AM CST	Special Weather Statement	OUN	Wilbarger	37 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.