Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 508, NWS Norman, OK

August 10, 2018Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 2018, 4:57 PM CDT for Woodward County, Oklahoma. It was in force for 48 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 10, 2018, 4:57 PM CDT (21:57 UTC)
Expired: Aug 10, 2018, 5:45 PM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Woodward County, OK

The radar

The Vance AFB radar (KVNX), 108 km from the middle of the area, began a volume at 21:59 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 12:00Z, 10.0 hours before the alert went out and 215 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: 1864 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1104 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 18 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 10, 3:47 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 10, 3:47 PM CDT, 1 hour 10 minutes before

Area Forecast Discussion
National Weather Service Norman OK
347 PM CDT Fri Aug 10 2018

.DISCUSSION...
Scattered showers and storms are expected over the next few days
as a cutoff upper low waddles over west Texas through the weekend
before the models finally show enough it wandering far enough
north to get nudged out by the weak northern stream by mid-week
next week. The most widespread precipitation chances currently
look to be Sunday through Tuesday. With precipitable water values
approaching or exceeding two inches (especially in the southeast
half of the area) and weak flow, there could be some localized
heavy rain potential, especially Sunday/Monday. With the exit of
this system dependent on the subtle movement of the cutoff low
center and the weak flow in the pattern, do not have a lot of
confidence in the later time periods, although the models
currently are relatively consistent with this scenario.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  71  91  69  83 /  20  30  30  60
Hobart OK         70  91  70  85 /  30  40  30  60
Wichita Falls TX  71  92  72  85 /  30  30  40  60
Gage OK           65  90  67  85 /  20  10  20  40
Ponca City OK     68  93  70  87 /  20  20  20  50
Durant OK         71  89  71  86 /  20  30  40  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

Hazardous weather outlook, Aug 10, 4:06 PM CDT, 51 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
406 PM CDT Fri Aug 10 2018

OKZ004>048-050>052-TXZ083>090-112115-
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-
406 PM CDT Fri Aug 10 2018

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

.DAY ONE...Through Tonight...

.Thunderstorms...
Isolated to scattered thunderstorms will continue to develop and
move across portions of the area through tonight. Brief strong
wind gusts, heavy rain, and lightning are the main concerns with
any storms that occur.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

.Thunderstorms...
Thunderstorms will be possible through the middle of next week
with the greatest coverage of storms occurring Sunday through
Tuesday. Severe storms are unlikely. Some storms may produce heavy
rainfall amounts.

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 10, 3:58 PM CDT, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
358 PM CDT FRI AUG 10 2018

OKZ005-006-102130-
Alfalfa OK-Woods OK-
358 PM CDT FRI AUG 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Alfalfa and
northeastern Woods Counties Until 430 PM CDT....

AT 352 PM CDT, a strong thunderstorm was located near Capron, moving
east at 10 MPH.

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

LAT...LON 3689 9876 3700 9868 3700 9841 3689 9841
      3680 9853
TIME...MOT...LOC 2052Z 287DEG 10KT 3692 9854

MAD

Special weather statement, Aug 10, 4:07 PM CDT, 50 minutes before

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Local storm report, Aug 10, 4:13 PM CDT, 44 minutes before

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Special weather statement, Aug 10, 4:30 PM CDT, 27 minutes before

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Special weather statement, Aug 10, 4:54 PM CDT, 3 minutes before

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Special weather statement, Aug 10, 4:56 PM CDT, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:30 PM CDT	Special Weather Statement	OUN	Garfield	30 min
Aug 10, 1:30 PM CDT	Special Weather Statement	OUN	Garfield	30 min
Aug 10, 1:53 PM CDT	Special Weather Statement	OUN	Caddo	37 min
Aug 10, 1:56 PM CDT	Special Weather Statement	OUN	Custer	34 min
Aug 10, 2:19 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	26 min
Aug 10, 2:25 PM CDT	Special Weather Statement	OUN	Noble	35 min
Aug 10, 2:31 PM CDT	Special Weather Statement	OUN	Greer	29 min
Aug 10, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Custer	50 min
Aug 10, 3:08 PM CDT	Special Weather Statement	OUN	Woods	52 min
Aug 10, 3:21 PM CDT	Special Weather Statement	OUN	Payne	24 min
Aug 10, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Payne	32 min
Aug 10, 3:30 PM CDT	Special Weather Statement	OUN	Custer	30 min
Aug 10, 3:35 PM CDT	Special Weather Statement	OUN	Beckham	25 min
Aug 10, 3:47 PM CDT	Special Weather Statement	OUN	Kay	28 min
Aug 10, 3:52 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer	38 min
Aug 10, 3:56 PM CDT	Special Weather Statement	OUN	Beckham	34 min
Aug 10, 3:58 PM CDT	Special Weather Statement	OUN	Alfalfa	32 min
Aug 10, 4:00 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Washita	30 min
Aug 10, 4:07 PM CDT	Special Weather Statement	OUN	Woods	23 min
Aug 10, 4:16 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	44 min
Aug 10, 4:30 PM CDT	Special Weather Statement	OUN	Logan	30 min
Aug 10, 4:54 PM CDT	Special Weather Statement	OUN	Logan	36 min
Aug 10, 4:56 PM CDT	Special Weather Statement	OUN	Woodward	34 min
Aug 10, 5:24 PM CDT	Special Weather Statement	OUN	Greer	36 min
Aug 10, 5:30 PM CDT	Special Weather Statement	OUN	Logan	30 min
Aug 10, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	39 min
Aug 10, 6:13 PM CDT	Special Weather Statement	OUN	Oklahoma	32 min
Aug 10, 6:21 PM CDT	Special Weather Statement	OUN	Canadian	24 min
Aug 10, 6:36 PM CDT	Special Weather Statement	OUN	Canadian	24 min
Aug 10, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Oklahoma	50 min
Aug 10, 2:47 PM CDT	Special Weather Statement	OUN	Knox	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.