Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 627, NWS Norman, OK

August 5, 2020Blaine County, Kingfisher County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 5, 2020, 2:15 AM CDT for Blaine County, Kingfisher County, Oklahoma. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 5, 2020, 2:15 AM CDT (07:15 UTC)
Expired: Aug 5, 2020, 3:00 AM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Blaine County, OK, Kingfisher County, OK

The radar

The Vance AFB radar (KVNX), 93 km from the middle of the area, began a volume at 07:15 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

Norman, OK (KOUN), launched 00:00Z, 7.3 hours before the alert went out and 105 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: 1583 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 5, 2:03 AM CDT, 12 minutes earlier.

Area forecast discussion, Aug 5, 2:03 AM CDT, 12 minutes before

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Hazardous weather outlook, Aug 5, 2:14 AM CDT, 1 minute before

Hazardous Weather Outlook
National Weather Service Norman OK
214 AM CDT Wed Aug 5 2020

OKZ004>048-050>052-TXZ083>090-060715-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
214 AM CDT Wed Aug 5 2020

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Tonight...

Showers and thunderstorms are expected to continue through
northwestern and central Oklahoma and continue to move southeast
across much of the area overnight. A few strong to marginally
severe storms will be possible. Strong wind gusts will be the
main threat, along with heavy rains, frequent lightning, and also
the possibility for marginally severe hail as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
Thunderstorms will be ongoing early Wednesday across parts of the
area. Severe weather is not expected with this activity.
Thunderstorms chances will continue Wednesday night into Thursday
mainly across central into eastern Oklahoma. Storm chances
continue into the weekend, mainly across northern and western
Oklahoma. Although a strong to severe storm may be possible,
organized, widespread severe weather is not anticipated.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Special weather statement, Aug 5, 1:26 AM CDT, 49 minutes before

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Special weather statement, Aug 5, 1:42 AM CDT, 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
142 AM CDT Wed Aug 5 2020

OKZ011-050715-
Major OK-
142 AM CDT Wed Aug 5 2020

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Major County Until
215 AM CDT...

AT 137 AM CDT, a strong thunderstorm was located near Isabella,
moving east at 20 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...

Locations impacted include...
Ames and Isabella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3617 9811 3617 9825 3623 9842 3634 9840
      3635 9811
TIME...MOT...LOC 0637Z 280DEG 16KT 3627 9830

BRB

Special weather statement, Aug 5, 1:59 AM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
159 AM CDT Wed Aug 5 2020

OKZ005-006-050730-
Alfalfa OK-Woods OK-
159 AM CDT Wed Aug 5 2020

...SIGNIFICANT WEATHER ADVISORY FOR Alfalfa and eastern Woods
Counties Until 230 AM CDT...

AT 156 AM CDT, strong thunderstorms were along a line extending from
7 miles west of Hardtner to near Waynoka, moving east at 35 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Frequent cloud to ground lightning...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3646 9827 3646 9853 3645 9854 3655 9896
      3660 9896 3661 9898 3700 9884 3700 9812
TIME...MOT...LOC 0656Z 269DEG 30KT 3698 9878 3658 9889

BRB

Special weather statement, Aug 5, 2:00 AM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
200 AM CDT Wed Aug 5 2020

OKZ017-023-024-050730-
Canadian OK-Caddo OK-Blaine OK-
200 AM CDT Wed Aug 5 2020

...SIGNIFICANT WEATHER ADVISORY FOR southwestern Canadian...
northeastern Caddo and south central Blaine Counties Until 230 AM
CDT...

AT 156 AM CDT, a strong thunderstorm was located near Bridgeport,
moving southeast at 20 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...

Locations impacted include...
El Reno, Hinton, Geary, Calumet, Bridgeport and Cedar Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3551 9844 3567 9834 3557 9799 3533 9815
TIME...MOT...LOC 0656Z 298DEG 15KT 3556 9832

BRB

Special weather statement, Aug 5, 2:05 AM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
205 AM CDT Wed Aug 5 2020

OKZ004-005-010-050730-
Woodward OK-Harper OK-Woods OK-
205 AM CDT Wed Aug 5 2020

...SIGNIFICANT WEATHER ADVISORY FOR northern Woodward...eastern
Harper and northwestern Woods Counties Until 230 AM CDT...

AT 201 AM CDT, strong thunderstorms were along a line extending from
10 miles south of Buttermilk to 5 miles north of Fort Supply, moving
east at 30 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3700 9882 3649 9901 3663 9972 3700 9965
TIME...MOT...LOC 0701Z 273DEG 26KT 3696 9932 3665 9958

BRB

Special weather statement, Aug 5, 2:09 AM CDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
209 AM CDT Wed Aug 5 2020

OKZ018-019-050745-
Kingfisher OK-Logan OK-
209 AM CDT Wed Aug 5 2020

...SIGNIFICANT WEATHER ADVISORY FOR east central Kingfisher and
southwestern Logan Counties Until 245 AM CDT...

AT 206 AM CDT, a strong thunderstorm was located 4 miles west of
Cimarron City, moving southeast at 30 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

Locations impacted include...
Northwestern Edmond, Guthrie, Crescent, Cashion, Cedar Valley,
Cimarron City, Navina and Seward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3588 9735 3572 9746 3572 9750 3588 9779
      3599 9775
TIME...MOT...LOC 0706Z 297DEG 24KT 3590 9769

BRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 11:29 PM CDT	Special Weather Statement	OUN	Major	31 min
Aug 4, 11:44 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	46 min
Aug 5, 12:29 AM CDT	Special Weather Statement	OUN	Blaine	31 min
Aug 5, 12:43 AM CDT	Special Weather Statement	OUN	Major	32 min
Aug 5, 12:55 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Major	35 min
Aug 5, 1:24 AM CDT	Special Weather Statement	OUN	Canadian	36 min
Aug 5, 1:25 AM CDT	Special Weather Statement	OUN	Kingfisher	35 min
Aug 5, 1:26 AM CDT	Special Weather Statement	OUN	Alfalfa	34 min
Aug 5, 1:28 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher, Major	47 min
Aug 5, 1:42 AM CDT	Special Weather Statement	OUN	Major	33 min
Aug 5, 1:59 AM CDT	Special Weather Statement	OUN	Alfalfa, Woods	31 min
Aug 5, 2:00 AM CDT	Special Weather Statement	OUN	Canadian	30 min
Aug 5, 2:05 AM CDT	Special Weather Statement	OUN	Harper	25 min
Aug 5, 2:09 AM CDT	Special Weather Statement	OUN	Logan	36 min
Aug 5, 2:30 AM CDT	Special Weather Statement	OUN	Alfalfa, Woods	30 min
Aug 5, 2:32 AM CDT	Areal Flood Advisory	OUN	Harper, Woods, Woodward	118 min
Aug 5, 2:34 AM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian	116 min
Aug 5, 2:53 AM CDT	Flash Flood Warning	OUN	Blaine	3 hr
Aug 5, 3:04 AM CDT	Special Weather Statement	OUN	Garfield, Major	41 min
Aug 5, 3:36 AM CDT	Areal Flood Advisory	OUN	Kingfisher	114 min
Aug 5, 4:36 AM CDT	Special Weather Statement	OUN	Hughes	24 min
Aug 5, 4:42 AM CDT	Special Weather Statement	OUN	Grady	33 min
Aug 5, 5:02 AM CDT	Areal Flood Advisory	OUN	Canadian	118 min
Aug 5, 5:14 AM CDT	Special Weather Statement	OUN	McClain	31 min
Aug 5, 5:45 AM CDT	Areal Flood Warning	OUN	Blaine, Kingfisher	3 hr
Aug 5, 5:49 AM CDT	Special Weather Statement	OUN	Coal	26 min
Aug 5, 7:21 AM CDT	Areal Flood Advisory	OUN	Coal, Pontotoc	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning in 2020

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.