Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 466, NWS Norman, OK

August 21, 2021Dewey County, Major County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 21, 2021, 5:05 PM CDT for Dewey County, Major County, Woodward County, Oklahoma. It was in force for 40 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: Aug 21, 2021, 5:05 PM CDT (22:05 UTC)
Expired: Aug 21, 2021, 5:45 PM CDT
In force: 40 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

Counties Dewey County, OK, Major County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 99 km from the middle of the area, began a volume at 22:09 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 nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 10.1 hours before the alert went out and 204 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: 1831 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

415 
WUUS54 KOUN 212205
SVROUN
OKC043-093-153-212245-
/O.NEW.KOUN.SV.W.0466.210821T2205Z-210821T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
505 PM CDT Sat Aug 21 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  North central Dewey County in northwestern Oklahoma...
  Southwestern Major County in northwestern Oklahoma...
  Southeastern Woodward County in northwestern Oklahoma...

* Until 545 PM CDT.

* At 505 PM CDT, a severe thunderstorm was located near Taloga,
  moving northeast at 20 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...
  Taloga, Seiling and Chester. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3601 9892 3607 9906 3629 9894 3618 9871
TIME...MOT...LOC 2205Z 210DEG 18KT 3609 9895 

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

$$

JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 1:00 AM CDT	Special Weather Statement	OUN	Grant	30 min
Aug 21, 2:36 AM CDT	Heat Advisory	OUN	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 18 more	17 hr
Aug 21, 1:38 PM CDT	Heat Advisory	OUN	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 22 more	30 hr
Aug 21, 3:32 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Aug 21, 3:40 PM CDT	Special Weather Statement	OUN	Ellis	35 min
Aug 21, 3:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Ellis	38 min
Aug 21, 4:01 PM CDT	Special Weather Statement	OUN	Dewey	29 min
Aug 21, 4:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Dewey	49 min
Aug 21, 4:32 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Ellis, Woodward	43 min
Aug 21, 5:19 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	41 min
Aug 21, 5:22 PM CDT	Special Weather Statement	OUN	Kingfisher	23 min
Aug 21, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	46 min
Aug 21, 5:31 PM CDT	Special Weather Statement	OUN	Roger Mills	29 min
Aug 21, 5:35 PM CDT	Areal Flood Advisory	OUN	Dewey	3 hr
Aug 21, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woodward	47 min
Aug 21, 6:03 PM CDT	Special Weather Statement	OUN	Custer	27 min
Aug 21, 6:10 PM CDT	Special Weather Statement	OUN	Blaine	35 min
Aug 21, 6:14 PM CDT	Special Weather Statement	OUN	Dewey	31 min
Aug 21, 6:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Kingfisher	23 min
Aug 21, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	39 min
Aug 21, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Aug 21, 6:33 PM CDT	Areal Flood Advisory	OUN	Dewey, Ellis, Roger Mills	3 hr
Aug 21, 6:56 PM CDT	Special Weather Statement	OUN	Kingfisher	34 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.