Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS Norman, OK

March 17, 20214 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 17, 2021, 2:55 AM CDT for 4 counties in Oklahoma. It was in force for 65 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 17, 2021, 2:55 AM CDT (07:55 UTC)
Expired: Mar 17, 2021, 4:00 AM CDT
In force: 65 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Garfield County, OK, Grant County, OK, Kay County, OK, Noble County, OK

The radar

The Vance AFB radar (KVNX), 94 km from the middle of the area, began a volume at 07:58 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 16, 7:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.9 hours before the alert went out and 149 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: 626 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1825 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

941 
WUUS54 KOUN 170755
SVROUN
OKC047-053-071-103-170900-
/O.NEW.KOUN.SV.W.0052.210317T0755Z-210317T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
255 AM CDT Wed Mar 17 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southwestern Kay County in northern Oklahoma...
  Noble County in northern Oklahoma...
  Southeastern Grant County in northern Oklahoma...
  Eastern Garfield County in northern Oklahoma...

* Until 400 AM CDT.

* At 255 AM CDT, severe thunderstorms were located along a line
  extending from near Hunter to 6 miles southeast of Garber to 4
  miles east of Douglas, moving northeast at 40 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...
  Ponca City, Perry, Tonkawa, Garber, Morrison, Covington, Billings,
  Red Rock, Breckenridge, Marland, Hunter, Douglas, Lucien, Sooner
  Lake, Ceres and Hayward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3677 9695 3669 9693 3670 9704 3668 9706
      3666 9706 3660 9704 3659 9706 3658 9700
      3660 9691 3656 9689 3653 9699 3651 9703
      3633 9703 3633 9692 3627 9692 3619 9768
      3636 9769 3656 9781
TIME...MOT...LOC 0755Z 241DEG 34KT 3659 9763 3637 9750 3623 9758 

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

Mahale

2 follow-up statements

242 
WWUS54 KOUN 170806
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
306 AM CDT Wed Mar 17 2021

OKC047-053-071-103-170900-
/O.CON.KOUN.SV.W.0052.000000T0000Z-210317T0900Z/
Kay OK-Noble OK-Grant OK-Garfield OK-
306 AM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM CDT
FOR SOUTHWESTERN KAY...NOBLE...SOUTHEASTERN GRANT AND EASTERN
GARFIELD COUNTIES...

At 306 AM CDT, severe thunderstorms were located along a line
extending from 4 miles northwest of Billings to 10 miles northwest of
Perry to near Lucien, moving northeast at 40 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...
Ponca City, Perry, Tonkawa, Garber, Morrison, Covington, Billings,
Red Rock, Marland, Douglas, Lucien, Sooner Lake, Ceres and Hayward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3677 9695 3669 9693 3670 9704 3668 9706
      3666 9706 3660 9704 3659 9706 3658 9700
      3660 9691 3656 9689 3653 9699 3651 9703
      3633 9703 3633 9692 3627 9692 3619 9768
      3630 9768 3640 9760 3660 9766
TIME...MOT...LOC 0806Z 240DEG 34KT 3658 9750 3642 9739 3628 9747 

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

Mahale

479 
WWUS54 KOUN 170815
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
315 AM CDT Wed Mar 17 2021

OKC053-170825-
/O.CAN.KOUN.SV.W.0052.000000T0000Z-210317T0900Z/
Grant OK-
315 AM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GRANT COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3677 9695 3669 9693 3670 9704 3668 9706
      3666 9706 3660 9704 3659 9706 3658 9700
      3660 9691 3656 9689 3651 9703 3633 9703
      3633 9692 3627 9693 3619 9768 3630 9768
      3647 9753 3659 9746 3665 9745
TIME...MOT...LOC 0815Z 240DEG 34KT 3663 9739 3646 9731 3624 9744 

$$

OKC047-071-103-170900-
/O.CON.KOUN.SV.W.0052.000000T0000Z-210317T0900Z/
Kay OK-Noble OK-Garfield OK-
315 AM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM CDT
FOR SOUTHWESTERN KAY...NOBLE AND SOUTHEASTERN GARFIELD COUNTIES...

At 315 AM CDT, severe thunderstorms were located along a line
extending from 6 miles southwest of Tonkawa to 7 miles west of Red
Rock to near Lucien, moving northeast at 40 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...
Ponca City, Perry, Tonkawa, Morrison, Covington, Billings, Red Rock,
Marland, Douglas, Lucien, Sooner Lake, Ceres and Hayward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3677 9695 3669 9693 3670 9704 3668 9706
      3666 9706 3660 9704 3659 9706 3658 9700
      3660 9691 3656 9689 3651 9703 3633 9703
      3633 9692 3627 9693 3619 9768 3630 9768
      3647 9753 3659 9746 3665 9745
TIME...MOT...LOC 0815Z 240DEG 34KT 3663 9739 3646 9731 3624 9744 

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

Mahale

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 8:19 PM CDT	Severe Thunderstorm Warning	OUN	Beckham	26 min
Mar 16, 8:22 PM CDT	Special Weather Statement	OUN	Harmon	23 min
Mar 16, 8:42 PM CDT	Special Weather Statement	OUN	Harmon	33 min
Mar 16, 8:45 PM CDT	Special Weather Statement	OUN	Beckham	30 min
Mar 16, 8:47 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	43 min
Mar 16, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	46 min
Mar 16, 9:33 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	42 min
Mar 16, 9:44 PM CDT	Special Weather Statement	OUN	Harper	31 min
Mar 16, 9:55 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	35 min
Mar 16, 10:06 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	39 min
Mar 16, 10:11 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	64 min
Mar 16, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	48 min
Mar 16, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	47 min
Mar 16, 10:45 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Woodward	60 min
Mar 16, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	49 min
Mar 16, 11:17 PM CDT	Tornado Warning	OUN	Caddo, Kiowa, Washita	43 min
Mar 16, 11:32 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods, Woodward	58 min
Mar 16, 11:40 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	50 min
Mar 16, 11:47 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Roger Mills, Woodward	58 min
Mar 16, 11:50 PM CDT	Special Weather Statement	OUN	Harmon	25 min
Mar 16, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	52 min
Mar 16, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	49 min
Mar 17, 12:04 AM CDT	Special Weather Statement	OUN	Dewey	26 min
Mar 17, 12:09 AM CDT	Special Weather Statement	OUN	Blaine, Kingfisher	36 min
Mar 17, 12:09 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	51 min
Mar 17, 12:18 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	42 min
Mar 17, 12:20 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	40 min
Mar 17, 12:32 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	43 min
Mar 17, 12:34 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major, Woodward	56 min
Mar 17, 12:42 AM CDT	Special Weather Statement	OUN	Ellis	33 min
Mar 17, 12:42 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian	31 min
Mar 17, 12:44 AM CDT	Tornado Warning	OUN	Dewey	21 min
Mar 17, 12:54 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian	51 min
Mar 17, 12:59 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Major	46 min
Mar 17, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa, Washita	33 min
Mar 17, 1:26 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Kingfisher, Major	49 min
Mar 17, 1:27 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	48 min
Mar 17, 1:30 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	45 min
Mar 17, 1:39 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher, Major	37 min
Mar 17, 1:42 AM CDT	Severe Thunderstorm Warning	OUN	Garfield	16 min
Mar 17, 1:54 AM CDT	Areal Flood Advisory	OUN	Blaine, Canadian, Custer, Kingfisher	111 min
Mar 17, 1:57 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	33 min
Mar 17, 2:11 AM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	49 min
Mar 17, 2:13 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	47 min
Mar 17, 2:42 AM CDT	Flash Flood Warning	OUN	Blaine, Kingfisher	3 hr
Mar 17, 2:57 AM CDT	Special Weather Statement	OUN	Kingfisher, Logan	33 min
Mar 17, 3:19 AM CDT	Winter Weather Advisory	OUN	Dewey, Ellis, Harper, Major, Roger Mills, Woodward	16 hr
Mar 17, 3:29 AM CDT	Special Weather Statement	OUN	Logan, Payne	46 min
Mar 17, 3:32 AM CDT	Areal Flood Advisory	OUN	Garfield, Kingfisher	3 hr
Mar 17, 3:46 AM CDT	Areal Flood Advisory	OUN	Garfield, Kay, Logan, Noble	3 hr
Mar 17, 4:01 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	27 min
Mar 17, 5:40 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	35 min
Mar 17, 6:11 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	34 min
Mar 17, 8:45 AM CDT	River Flood Advisory	OUN	Major, Woods, Woodward	11 hr
Mar 17, 8:55 AM CDT	River Flood Advisory	OUN	Blaine, Canadian	28 hr
Mar 17, 8:58 AM CDT	River Flood Advisory	OUN	Kingfisher, Logan	64 hr
Mar 17, 9:01 AM CDT	River Flood Advisory	OUN	Blaine, Caddo, Canadian, Custer	11 hr
Mar 17, 12:57 PM CDT	River Flood Advisory	OUN	Kingfisher	18 hr
Mar 17, 3:21 PM CDT	Special Weather Statement	OUN	Pottawatomie	24 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.