Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 429, NWS Norman, OK

July 25, 20214 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 25, 2021, 8:12 PM CDT for 4 counties in Oklahoma. It was in force for 31 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, 8:12 PM CDT (01:12 UTC)
Expired: Jul 25, 2021, 8:43 PM CDT
In force: 31 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Custer County, OK, Dewey County, OK, Ellis County, OK, Roger Mills County, OK

The radar

The Vance AFB radar (KVNX), 144 km from the middle of the area, began a volume at 01:14 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 00:00Z, 1.2 hours before the alert went out and 216 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: 381 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 1534 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

979 
WUUS54 KOUN 260112
SVROUN
OKC039-043-045-129-260200-
/O.NEW.KOUN.SV.W.0429.210726T0112Z-210726T0200Z/

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

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  East central Ellis County in northwestern Oklahoma...
  Northeastern Roger Mills County in western Oklahoma...
  Northwestern Custer County in western Oklahoma...
  Western Dewey County in northwestern Oklahoma...

* Until 900 PM CDT.

* At 811 PM CDT, a severe thunderstorm was located near Moorewood,
  moving north at 25 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...
  Leedey, Camargo, Angora and Moorewood. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3570 9927 3572 9949 3616 9947 3613 9914
TIME...MOT...LOC 0111Z 188DEG 22KT 3579 9937 

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

Zwink

1 follow-up statement

491 
WWUS54 KOUN 260143
SVSOUN

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

OKC039-043-045-129-260153-
/O.CAN.KOUN.SV.W.0429.000000T0000Z-210726T0200Z/
Ellis OK-Roger Mills OK-Custer OK-Dewey OK-
843 PM CDT Sun Jul 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ELLIS...
NORTHEASTERN ROGER MILLS...NORTHWESTERN CUSTER AND WESTERN DEWEY
COUNTIES IS CANCELLED...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning has been cancelled.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3570 9927 3572 9949 3616 9947 3613 9914
TIME...MOT...LOC 0140Z 188DEG 22KT 3598 9934 

$$

Zwink

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Washita	45 min
Jul 25, 7:34 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Blaine, Caddo, Canadian, Custer, Kingfisher and 1 more	41 min
Jul 25, 7:38 PM CDT	Areal Flood Advisory	OUN	Blaine, Kingfisher	3 hr
Jul 25, 7:43 PM CDT	Special Weather Statement	OUN	Cotton	32 min
Jul 25, 8:07 PM CDT	Flash Flood Warning	OUN	Beckham, Custer, Roger Mills, Washita	3 hr
Jul 25, 8:14 PM CDT	Special Weather Statement	OUN	Canadian, Custer, Washita	46 min
Jul 25, 8:38 PM CDT	Severe Thunderstorm Warning	OUN	Washita	30 min
Jul 25, 9:08 PM CDT	Special Weather Statement	OUN	Caddo	37 min
Jul 25, 9:23 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	25 min
Jul 25, 9:46 PM CDT	Special Weather Statement	OUN	Comanche, Stephens	29 min
Jul 25, 10:30 PM CDT	Areal Flood Advisory	OUN	Grady	3 hr
Jul 25, 10:33 PM CDT	Special Weather Statement	OUN	Stephens	42 min
Jul 25, 10:44 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche	3 hr
Jul 26, 1:53 AM CDT	Special Weather Statement	OUN	Woods	37 min
Jul 26, 2:08 AM CDT	Special Weather Statement	OUN	Woodward	37 min
Jul 26, 3:49 AM CDT	Special Weather Statement	OUN	Kiowa	41 min
Jul 26, 1:58 PM CDT	Special Weather Statement	OUN	Garfield	32 min
Jul 26, 2:07 PM CDT	Special Weather Statement	OUN	Grant	23 min
Jul 26, 2:39 PM CDT	Special Weather Statement	OUN	Oklahoma	21 min
Jul 26, 2:44 PM CDT	Areal Flood Advisory	OUN	Canadian, Oklahoma	2 hr
Jul 26, 2:54 PM CDT	Special Weather Statement	OUN	Noble	21 min
Jul 26, 3:08 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Kingfisher, Logan, Noble and 1 more	52 min
Jul 26, 3:36 PM CDT	Flash Flood Warning	OUN	Oklahoma	4 hr
Jul 26, 3:58 PM CDT	Special Weather Statement	OUN	Kay, Logan, Noble, Oklahoma	32 min
Jul 26, 3:59 PM CDT	Areal Flood Advisory	OUN	Grant, Kay	3 hr
Jul 26, 4:19 PM CDT	Special Weather Statement	OUN	Cleveland	11 min
Jul 26, 4:22 PM CDT	Flash Flood Warning	OUN	Canadian, Logan, Oklahoma	3 hr
Jul 26, 4:31 PM CDT	Special Weather Statement	OUN	Kay, Logan, Noble, Oklahoma, Payne	44 min
Jul 26, 5:14 PM CDT	Areal Flood Advisory	OUN	Lincoln, Logan, Oklahoma, Pottawatomie	3 hr
Jul 26, 5:16 PM CDT	Special Weather Statement	OUN	Lincoln, Payne	44 min
Jul 26, 6:25 PM CDT	Special Weather Statement	OUN	Hughes	35 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.