Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 375, NWS Norman, OK

June 23, 2018Cleveland County, McClain County, Pottawatomie County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 23, 2018, 11:12 PM CDT for Cleveland County, McClain County, Pottawatomie 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: Jun 23, 2018, 11:12 PM CDT (04:12 UTC)
Expired: Jun 24, 2018, 12:00 AM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Cleveland County, OK, McClain County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 22 km from the middle of the area, began a volume at 04:12 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, 4.2 hours before the alert went out and 17 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: 3256 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1229 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.8

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 Jun 23, 10:00 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jun 23, 10:00 PM CDT, 1 hour 12 minutes before

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Hazardous weather outlook, Jun 23, 8:40 PM CDT, 2 hours 32 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
840 PM CDT Sat Jun 23 2018

OKZ004>048-050>052-TXZ083>090-241700-
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-
840 PM CDT Sat Jun 23 2018

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

.DAY ONE...Tonight...

.Thunderstorms...
There is an enhanced risk for severe thunderstorms later tonight for
northwestern Oklahoma. A slight risk exists across other parts of
Oklahoma and northern Texas.

Location...
The enhanced risk is west of Medford, Enid, and Kingfisher and
north of I-40. The slight risk covers areas outside
of the enhanced risk.

Timing... Through 5 AM.

Impacts...
Hail up to the size of golfballs.
Damaging wind gusts between 60 to 80 mph.
Heavy rainfall that may cause localized flooding.

Discussion...
A complex of thunderstorms is expected to move into
northwestern Oklahoma from southwestern Kansas tonight. It is
expected to produce damaging winds along its leading edge as it
moves toward central Oklahoma by sunrise. In the slight risk area
isolated severe thunderstorms are possible as the low-level jet
increases in an environment of moderate instability.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across the
risk area should prepare for severe weather operations.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

.Thunderstorms...
There is a Moderate Risk for severe thunderstorms across a small
part of northwestern Oklahoma for Sunday evening into early Monday
morning. Damaging wind gusts will be the primary hazard. Large hail
up to the size of baseballs will be possible as well. A slight risk
covers the northwestern third of Oklahoma outside of the moderate
and enhanced risk areas.

There will be a continued chance for thunderstorms Monday into
early Tuesday. A few strong thunderstorms are possible Monday
across north central Oklahoma.

.Heat...
Heat index values from 100 to 105 degrees are forecast through
much of this week. If you will be outdoors, limit strenuous
activities and take frequent breaks.

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

In the hours before

Local storm report, Jun 23, 9:50 PM CDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
950 PM CDT SAT JUN 23 2018

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

0820 PM     HAIL             3 E TIPTON              34.51N 99.08W
06/23/2018  E2.00 INCH       TILLMAN            OK   STORM CHASER

&&

PW

Local storm report, Jun 23, 10:02 PM CDT, 1 hour 10 minutes before

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Special weather statement, Jun 23, 10:14 PM CDT, 58 minutes before

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Special weather statement, Jun 23, 10:27 PM CDT, 45 minutes before

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Special weather statement, Jun 23, 10:34 PM CDT, 38 minutes before

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Special weather statement, Jun 23, 10:49 PM CDT, 23 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
Jun 23, 7:13 PM CDT	Special Weather Statement	OUN	Greer	32 min
Jun 23, 7:18 PM CDT	Special Weather Statement	OUN	Jackson	27 min
Jun 23, 7:57 PM CDT	Special Weather Statement	OUN	Tillman	33 min
Jun 23, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	27 min
Jun 23, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Tillman	49 min
Jun 23, 8:37 PM CDT	Special Weather Statement	OUN	Coal	38 min
Jun 23, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	51 min
Jun 23, 9:43 PM CDT	Special Weather Statement	OUN	Lincoln	32 min
Jun 23, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	31 min
Jun 23, 10:14 PM CDT	Special Weather Statement	OUN	Lincoln	31 min
Jun 23, 10:27 PM CDT	Special Weather Statement	OUN	McClain	33 min
Jun 23, 10:34 PM CDT	Special Weather Statement	OUN	Lincoln	26 min
Jun 23, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	39 min
Jun 23, 10:47 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	28 min
Jun 23, 10:49 PM CDT	Special Weather Statement	OUN	McClain	26 min
Jun 23, 11:10 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Jun 23, 11:31 PM CDT	Special Weather Statement	OUN	Harper	44 min
Jun 23, 11:34 PM CDT	Areal Flood Advisory	OUN	Lincoln	3 hr
Jun 23, 11:47 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	28 min
Jun 24, 12:03 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	42 min
Jun 24, 12:06 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	39 min
Jun 24, 12:12 AM CDT	Special Weather Statement	OUN	Harper	33 min
Jun 24, 12:28 AM CDT	Areal Flood Warning	OUN	Lincoln	3 hr
Jun 24, 12:42 AM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	48 min
Jun 24, 12:47 AM CDT	Special Weather Statement	OUN	Noble	28 min
Jun 24, 12:58 AM CDT	Special Weather Statement	OUN	Hughes	32 min
Jun 24, 1:13 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods, Woodward	47 min
Jun 24, 1:17 AM CDT	Special Weather Statement	OUN	Noble	28 min
Jun 24, 1:22 AM CDT	Severe Thunderstorm Warning	OUN	Noble	38 min
Jun 24, 1:29 AM CDT	Special Weather Statement	OUN	Woodward	46 min
Jun 24, 1:32 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	28 min
Jun 24, 1:49 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major, Woods	41 min
Jun 24, 2:01 AM CDT	Special Weather Statement	OUN	Payne	29 min
Jun 24, 2:09 AM CDT	Special Weather Statement	OUN	Kay	36 min
Jun 24, 2:24 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Kay, Major, Noble	51 min
Jun 24, 2:32 AM CDT	Special Weather Statement	OUN	Dewey, Major	28 min
Jun 24, 2:42 AM CDT	Areal Flood Advisory	OUN	Payne	3 hr
Jun 24, 2:50 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Major	40 min
Jun 24, 3:06 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Kingfisher, Logan, Noble and 1 more	54 min
Jun 24, 3:29 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher, Logan	26 min
Jun 24, 3:52 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	38 min
Jun 24, 3:54 AM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	36 min
Jun 24, 4:09 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Lincoln, Logan, Oklahoma, Pottawatomie	51 min
Jun 24, 4:23 AM CDT	Special Weather Statement	OUN	Washita	37 min
Jun 24, 4:26 AM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	22 min
Jun 24, 4:33 AM CDT	Special Weather Statement	OUN	Hughes	27 min
Jun 24, 4:35 AM CDT	Severe Thunderstorm Warning	OUN	Hughes	29 min
Jun 24, 4:57 AM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	33 min
Jun 24, 5:06 AM CDT	Special Weather Statement	OUN	Pottawatomie	24 min
Jun 24, 5:27 AM CDT	Special Weather Statement	OUN	Hughes, Pontotoc, Pottawatomie, Seminole	48 min
Jun 24, 5:31 AM CDT	Special Weather Statement	OUN	Dewey	29 min
Jun 24, 5:34 AM CDT	Special Weather Statement	OUN	Dewey	26 min
Jun 24, 5:43 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major, Woodward	47 min
Jun 24, 5:47 AM CDT	Special Weather Statement	OUN	Coal, Hughes, Pontotoc, Seminole	28 min
Jun 24, 6:01 AM CDT	Special Weather Statement	OUN	Woodward	29 min
Jun 24, 6:14 AM CDT	Special Weather Statement	OUN	Canadian	31 min
Jun 24, 6:19 AM CDT	Special Weather Statement	OUN	Woods	26 min
Jun 24, 6:22 AM CDT	Areal Flood Advisory	OUN	Lincoln	3 hr
Jun 24, 6:26 AM CDT	Special Weather Statement	OUN	Blaine, Major, Woods	34 min
Jun 24, 6:33 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	42 min
Jun 24, 6:36 AM CDT	Special Weather Statement	OUN	Oklahoma	24 min
Jun 24, 6:47 AM CDT	Special Weather Statement	OUN	Woods	28 min
Jun 24, 7:09 AM CDT	Special Weather Statement	OUN	Lincoln	36 min
Jun 24, 7:13 AM CDT	Special Weather Statement	OUN	Blaine, Major	32 min
Jun 24, 7:27 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	29 min
Jun 24, 7:34 AM CDT	Areal Flood Advisory	OUN	Blaine, Dewey, Major	3 hr
Jun 24, 7:43 AM CDT	Special Weather Statement	OUN	Major	32 min
Jun 24, 7:47 AM CDT	Severe Thunderstorm Warning	OUN	Major	43 min
Jun 24, 7:53 AM CDT	Special Weather Statement	OUN	Major	37 min
Jun 24, 8:23 AM CDT	Areal Flood Advisory	OUN	Alfalfa, Major, Woods, Woodward	3 hr
Jun 24, 8:27 AM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	48 min
Jun 24, 8:52 AM CDT	Flash Flood Warning	OUN	Major	6 hr
Jun 24, 9:53 AM CDT	Special Weather Statement	OUN	Major	52 min
Jun 24, 11:28 AM CDT	Special Weather Statement	OUN	Kingfisher	47 min
Jun 24, 11:44 AM CDT	Areal Flood Advisory	OUN	Blaine, Garfield, Kingfisher, Major	3 hr
Jun 24, 12:04 PM CDT	Special Weather Statement	OUN	Blaine, Custer, Kingfisher, Logan, Washita	41 min
Jun 24, 12:19 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	21 min
Jun 24, 12:43 PM CDT	Special Weather Statement	OUN	Caddo, Canadian, Greer, Kingfisher, Kiowa, Logan and 1 more	32 min
Jun 24, 1:18 PM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian, Cleveland, Comanche, Custer and 9 more	3 hr
Jun 24, 1:32 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	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.