Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 56, NWS Norman, OK

March 22, 20214 counties in Oklahoma; Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Mar 22, 2021, 3:20 PM CDT for 4 counties in Oklahoma; Hardeman County, Texas. 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: Mar 22, 2021, 3:20 PM CDT (20:20 UTC)
Expired: Mar 22, 2021, 4:00 PM CDT
In force: 40 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 92 km from the middle of the area, began a volume at 20:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 22, 2:31 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.3 hours before the alert went out and 177 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: 1493 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

600 
WUUS54 KOUN 222020
SVROUN
OKC009-055-057-065-TXC197-222100-
/O.NEW.KOUN.SV.W.0056.210322T2020Z-210322T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
320 PM CDT Mon Mar 22 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southwestern Jackson County in southwestern Oklahoma...
  Harmon County in southwestern Oklahoma...
  Western Greer County in southwestern Oklahoma...
  Southwestern Beckham County in western Oklahoma...
  Northwestern Hardeman County in northern Texas...

* Until 400 PM CDT.

* At 320 PM CDT, severe thunderstorms were located along a line
  extending from 11 miles southwest of Dodson to 6 miles northeast of
  Kirkland to 9 miles north of Swearingen, moving northeast at 45
  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...
  Quanah, Hollis, Erick, Eldorado, Gould, Texola, Vinson, Duke,
  Goodlett, Madge, McQueen, Lazare and McKnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3523 10000 3525 9981 3500 9952 3447 9952
      3418 9993 3422 10000
TIME...MOT...LOC 2020Z 218DEG 41KT 3464 10017 3448 10002 3428 10009 

HAIL...1.00IN
WIND...70MPH
 
$$

..speg.

2 follow-up statements

439 
WWUS54 KOUN 222043
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
343 PM CDT Mon Mar 22 2021

OKC009-055-057-065-TXC197-222100-
/O.CON.KOUN.SV.W.0056.000000T0000Z-210322T2100Z/
Jackson OK-Harmon OK-Greer OK-Beckham OK-Hardeman TX-
343 PM CDT Mon Mar 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR SOUTHWESTERN JACKSON...HARMON...WESTERN GREER...SOUTHWESTERN
BECKHAM AND NORTHWESTERN HARDEMAN COUNTIES...

At 341 PM CDT, severe thunderstorms were located along a line 
extending from the Texas state line near Dodson Texas to 4 miles 
southeast of Hollis to 8 miles northeast of Swearingen Texas, moving 
northeast at 45 mph. Hail to the size of quarters will be possible 
in the Hollis and Gould areas, while the potential for 60 to 70 mph 
winds extend across Harmon and Hardeman Counties moving towards 
Jackson, Greer and potentially southern Beckham Counties.

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...
Quanah, Hollis, Erick, Eldorado, Gould, Texola, Vinson, Duke,
Goodlett, Madge, McQueen, Lazare and McKnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3522 10000 3525 9981 3500 9952 3447 9952
      3418 9993 3422 10000
TIME...MOT...LOC 2041Z 218DEG 37KT 3480 10002 3464 9986 3423 10002 

HAIL...1.00IN
WIND...70MPH
 
$$

..speg.

632 
WWUS54 KOUN 222057
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
357 PM CDT Mon Mar 22 2021

OKC009-055-057-065-TXC197-222106-
/O.EXP.KOUN.SV.W.0056.000000T0000Z-210322T2100Z/
Jackson OK-Harmon OK-Greer OK-Beckham OK-Hardeman TX-
357 PM CDT Mon Mar 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JACKSON...
HARMON...WESTERN GREER...SOUTHWESTERN BECKHAM AND NORTHWESTERN
HARDEMAN COUNTIES WILL EXPIRE AT 400 PM CDT...
             
The storms which prompted the warning have weakened below severe
limits, therefore the warning will be allowed to expire.  However
gusty winds are still possible with these thunderstorms.

LAT...LON 3522 10000 3525 9981 3500 9952 3447 9952
      3418 9993 3422 10000
TIME...MOT...LOC 2056Z 218DEG 41KT 3491 9991 3475 9975 3434 9991 

$$

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 22, 11:53 AM CDT	Special Weather Statement	OUN	Comanche, Cotton, Grady, Stephens	37 min
Mar 22, 2:18 PM CDT	River Flood Advisory	OUN	Major, Woods, Woodward	19 hr
Mar 22, 4:10 PM CDT	Special Weather Statement	OUN	Jackson	35 min
Mar 22, 4:40 PM CDT	Special Weather Statement	OUN	Caddo, Comanche	35 min
Mar 22, 4:43 PM CDT	Special Weather Statement	OUN	Kiowa	32 min
Mar 22, 4:53 PM CDT	Special Weather Statement	OUN	Kiowa	37 min
Mar 22, 5:09 PM CDT	Special Weather Statement	OUN	Kiowa, Tillman	36 min
Mar 22, 6:31 PM CDT	Special Weather Statement	OUN	Jefferson	29 min
Mar 22, 12:00 PM CDT	Special Weather Statement	OUN	Clay	45 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.