Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 326, NWS Norman, OK

May 17, 2017Cleveland County, Lincoln County, Pottawatomie County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 17, 2017, 1:14 AM CDT for Cleveland County, Lincoln County, Pottawatomie County, Oklahoma. It was in force for 46 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: May 17, 2017, 1:14 AM CDT (06:14 UTC)
Expired: May 17, 2017, 2:00 AM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Cleveland County, OK, Lincoln County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 21 km from the middle of the area, began a volume at 06:16 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
May 16, 10:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.2 hours before the alert went out and 36 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: 768 J/kg
Mixed-layer CIN: -307 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 308 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 May 17, 12:53 AM CDT, 21 minutes earlier.

Area forecast discussion, May 17, 12:53 AM CDT, 21 minutes before

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Hazardous weather outlook, May 16, 9:45 PM CDT, 3 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
945 PM CDT Tue May 16 2017

OKZ004>048-050>052-TXZ083>090-171715-
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-
945 PM CDT Tue May 16 2017

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

.DAY ONE...Tonight...

.Thunderstorms...
There is a enhanced risk for severe thunderstorms for portions of
western Oklahoma and western sections of north Texas overnight.
There is also a slight risk over central sections of Oklahoma and
parts of western north Texas.

Location... The enhance risk is west of a line from Cherokee to
Watonga to Fort Cobb to Cache and Granfield Oklahoma to Archer City
Texas.

East of the enhanced risk area, there are slight risk of severe
weather west of a line from Chandler to Pauls Valley to Marietta.

There is a marginal risk of severe storms across southeast
Oklahoma.

Timing...
The most likely time for severe weather is through sunrise
Wednesday morning.

Impacts...
Hail up the size of tennis balls and thunderstorm wind gusts over
70 mph will be the primary threats. Tornadoes will also be
possible, especially across the enhanced risk area of western
Oklahoma and western north Texas.

Discussion...
A broken line of severe thunderstorms will move across much of
Oklahoma and western north Texas overnight. This line of storms will
be capable of producing damaging winds and large hail. A few brief,
weak tornadoes will be possible with this activity.

Spotter and Emergency Management Statement...
Storm spotter groups and emergency management personnel across
western and central Oklahoma and adjacent parts of north Texas
should prepare for severe weather operations overnight.

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

.Thunderstorms...
Thunderstorms may linger across parts of southeast Oklahoma into the
morning hours Wednesday before moving out of the area.

Storm chances return on Thursday and will persist at times through
the weekend and into Monday. Severe weather will be possible
Thursday and Friday.

.Heavy Rainfall...
There is a potential for high rain totals late Thursday through
Friday night, mainly over south-central and southeast Oklahoma. If
you live in an area that is prone to flash flooding, pay close
attention to the forecasts and warnings later this week.

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, May 16, 11:34 PM CDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1134 PM CDT TUE MAY 16 2017

OKZ005-006-010-011-170500-
Major OK-Woodward OK-Alfalfa OK-Woods OK-
1134 PM CDT TUE MAY 16 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Major...east central
Woodward...west central Alfalfa and southeastern Woods Counties Until
midnight CDT...

AT 1133 PM CDT, a strong thunderstorm was located 6 miles south of
Waynoka, moving northeast at 35 MPH.

HAZARDS INCLUDE...
Wind gusts over 50 MPH...

Locations impacted include...
Waynoka, Dacoma, Avard, Bouse Junction and Hopeton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3639 9888 3650 9901 3676 9872 3672 9853
      3663 9843
TIME...MOT...LOC 0433Z 235DEG 32KT 3649 9888

MAHALE

Local storm report, May 16, 11:35 PM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1135 PM CDT TUE MAY 16 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 PM     FLASH FLOOD      6 N CHEYENNE            35.70N 99.68W
05/16/2017                   ROGER MILLS        OK   TRAINED SPOTTER

            DEBRIS FILLED FLOOD WATERS RUNNING OVER HIGHWAY 283.

&&

TLINDLEY

Special weather statement, May 17, 12:03 AM CDT, 1 hour 11 minutes before

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Local storm report, May 17, 12:07 AM CDT, 1 hour 7 minutes before

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Local storm report, May 17, 12:45 AM CDT, 29 minutes before

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Local storm report, May 17, 1:00 AM CDT, 14 minutes 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
May 16, 7:08 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	OUN	Beckham, Washita	37 min
May 16, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	37 min
May 16, 7:25 PM CDT	Tornado Warning	OUN	Custer, Washita	35 min
May 16, 7:26 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	49 min
May 16, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major, Woods, Woodward	48 min
May 16, 7:55 PM CDT	Tornado Warning	OUN	Custer	35 min
May 16, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	48 min
May 16, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	42 min
May 16, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	47 min
May 16, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	42 min
May 16, 8:33 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	42 min
May 16, 8:33 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	42 min
May 16, 8:44 PM CDT	Special Weather Statement	OUN	Blaine	31 min
May 16, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major, Woodward	52 min
May 16, 9:03 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	42 min
May 16, 9:36 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	39 min
May 16, 9:39 PM CDT	Severe Thunderstorm Warning	OUN	Major	51 min
May 16, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	44 min
May 16, 9:51 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Ellis, Roger Mills	39 min
May 16, 9:53 PM CDT	Areal Flood Advisory	OUN	Dewey, Major, Roger Mills	3 hr
May 16, 9:57 PM CDT	Areal Flood Advisory	OUN	Roger Mills	3 hr
May 16, 10:02 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	28 min
May 16, 10:07 PM CDT	Special Weather Statement	OUN	Kiowa	38 min
May 16, 10:17 PM CDT	Flash Flood Warning	OUN	Roger Mills	3 hr
May 16, 10:22 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	53 min
May 16, 10:27 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Ellis, Roger Mills, Woodward	48 min
May 16, 11:04 PM CDT	Special Weather Statement	OUN	Comanche	26 min
May 16, 11:14 PM CDT	Flash Flood Warning	OUN	Dewey, Woodward	2 hr
May 16, 11:16 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	44 min
May 16, 11:19 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	41 min
May 16, 11:26 PM CDT	Areal Flood Advisory	OUN	Custer, Roger Mills	3 hr
May 16, 11:34 PM CDT	Special Weather Statement	OUN	Woods	26 min
May 16, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Stephens	49 min
May 16, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	49 min
May 17, 12:03 AM CDT	Special Weather Statement	OUN	Cotton, Tillman	27 min
May 17, 12:17 AM CDT	Wind Advisory	OUN	Blaine, Caddo, Canadian, Cleveland, Comanche, Custer and 11 more	103 min
May 17, 12:32 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	43 min
May 17, 12:46 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, Stephens	29 min
May 17, 1:02 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	28 min
May 17, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	33 min
May 17, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Comanche, Garvin, Grady, Jefferson, McClain and 2 more	31 min
May 17, 1:31 AM CDT	Special Weather Statement	OUN	Payne	29 min
May 17, 1:43 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Cleveland, Garvin, McClain, Murray, Pontotoc and 2 more	47 min
May 17, 2:54 AM CDT	Special Weather Statement	OUN	Love	36 min
May 17, 6:28 AM CDT	River Flood Warning	OUN	Dewey, Major, Woodward	25 hr
May 17, 10:04 AM CDT	Wind Advisory	OUN	Alfalfa, Blaine, Canadian, Custer, Dewey, Ellis and 14 more	6 hr
May 16, 7:46 PM CDT	Special Weather Statement	OUN	Knox	29 min
May 16, 8:10 PM CDT	Special Weather Statement	OUN	Foard, Knox	35 min
May 16, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	39 min
May 16, 9:24 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	51 min
May 16, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	48 min
May 16, 10:32 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	43 min
May 16, 10:38 PM CDT	Severe Thunderstorm Warning	OUN	Knox	52 min
May 16, 10:58 PM CDT	Areal Flood Advisory	OUN	Foard, Knox, Wilbarger	3 hr
May 16, 11:22 PM CDT	Special Weather Statement	OUN	Wilbarger	23 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.