Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 430, NWS Norman, OK

July 25, 2021Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 25, 2021, 8:38 PM CDT for Washita County, Oklahoma. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 25, 2021, 8:38 PM CDT (01:38 UTC)
Expired: Jul 25, 2021, 9:08 PM CDT
In force: 30 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Washita County, OK

The radar

The Altus AFB radar (KFDR), 107 km from the middle of the area, began a volume at 01:42 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.

What was reported inside it

Time	Report	Where	Remark
Jul 25, 8:45 PM CDT	TSTM WND GST 59	4 Wnw Bessie, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.6 hours before the alert went out and 236 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: 752 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 2129 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

306 
WUUS54 KOUN 260138
SVROUN
OKC149-260230-
/O.NEW.KOUN.SV.W.0430.210726T0138Z-210726T0230Z/

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

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Western Washita County in western Oklahoma...

* Until 930 PM CDT.

* At 838 PM CDT, a severe thunderstorm was located near Burns Flat,
  moving southeast at 20 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...
  Cordell, Burns Flat, Sentinel, Dill City and Rocky. 

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 3547 9913 3547 9909 3523 9885 3512 9908
      3512 9915 3538 9929
TIME...MOT...LOC 0138Z 327DEG 17KT 3537 9916 

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

Zwink

1 follow-up statement

267 
WWUS54 KOUN 260208
SVSOUN

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

OKC149-260218-
/O.CAN.KOUN.SV.W.0430.000000T0000Z-210726T0230Z/
Washita OK-
908 PM CDT Sun Jul 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WASHITA COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3547 9913 3547 9909 3523 9885 3512 9908
      3512 9915 3538 9929
TIME...MOT...LOC 0208Z 327DEG 17KT 3525 9906 

$$

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, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills	31 min
Jul 25, 8:14 PM CDT	Special Weather Statement	OUN	Canadian, Custer, Washita	46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.