Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 421, NWS Norman, OK

July 25, 2021Alfalfa County, Major County, Woods County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 25, 2021, 5:08 PM CDT for Alfalfa County, Major County, Woods County, Oklahoma. It was in force for 52 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: Jul 25, 2021, 5:08 PM CDT (22:08 UTC)
Expired: Jul 25, 2021, 6:00 PM CDT
In force: 52 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

Counties Alfalfa County, OK, Major County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 52 km from the middle of the area, began a volume at 22:11 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

Dodge City, (KDDC), launched 12:00Z, 10.1 hours before the alert went out and 189 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: 1522 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1763 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

165 
WUUS54 KOUN 252208
SVROUN
OKC003-093-151-252300-
/O.NEW.KOUN.SV.W.0421.210725T2208Z-210725T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
508 PM CDT Sun Jul 25 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Woods County in northwestern Oklahoma...
  Southwestern Alfalfa County in northwestern Oklahoma...
  Central Major County in northwestern Oklahoma...

* Until 600 PM CDT.

* At 507 PM CDT, a severe thunderstorm was located 6 miles west of
  Aline, moving south at 15 mph.

  HAZARD...70 mph wind gusts and ping pong ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Fairview, Cleo Springs and Orienta. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3655 9866 3655 9848 3626 9838 3626 9869
TIME...MOT...LOC 2207Z 357DEG 11KT 3651 9857 

HAIL...1.50IN
WIND...70MPH
 
$$

Zwink

1 follow-up statement

328 
WWUS54 KOUN 252233
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
533 PM CDT Sun Jul 25 2021

OKC003-093-151-252300-
/O.CON.KOUN.SV.W.0421.000000T0000Z-210725T2300Z/
Woods OK-Alfalfa OK-Major OK-
533 PM CDT Sun Jul 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHEASTERN WOODS...SOUTHWESTERN ALFALFA AND CENTRAL MAJOR
COUNTIES...

At 533 PM CDT, a severe thunderstorm was located 6 miles northwest of
Orienta, moving south at 15 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...
Fairview, Cleo Springs and Orienta. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3655 9866 3655 9848 3626 9838 3626 9869
TIME...MOT...LOC 2233Z 357DEG 11KT 3643 9856 

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

Zwink

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 7:45 PM CDT	Special Weather Statement	OUN	Kay	30 min
Jul 24, 8:09 PM CDT	Special Weather Statement	OUN	Kay	36 min
Jul 24, 8:41 PM CDT	Special Weather Statement	OUN	Kay	34 min
Jul 25, 9:09 AM CDT	Special Weather Statement	OUN	Woodward	36 min
Jul 25, 9:12 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	48 min
Jul 25, 10:18 AM CDT	Special Weather Statement	OUN	Dewey	27 min
Jul 25, 1:42 PM CDT	Special Weather Statement	OUN	Canadian	33 min
Jul 25, 2:42 PM CDT	Heat Advisory	OUN	Atoka, Bryan, Carter, Cleveland, Coal, Garfield and 19 more	28 hr
Jul 25, 3:32 PM CDT	Special Weather Statement	OUN	Woods	28 min
Jul 25, 3:48 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	42 min
Jul 25, 4:57 PM CDT	Special Weather Statement	OUN	Major	33 min
Jul 25, 5:11 PM CDT	Special Weather Statement	OUN	Kingfisher	34 min
Jul 25, 5:16 PM CDT	Special Weather Statement	OUN	Garfield	29 min
Jul 25, 5:27 PM CDT	Special Weather Statement	OUN	Jackson	48 min
Jul 25, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	27 min
Jul 25, 5:53 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Major	52 min
Jul 25, 6:00 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	45 min
Jul 25, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	47 min
Jul 25, 6:45 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	45 min

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.