Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 490, NWS Norman, OK

July 30, 2018Payne County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 30, 2018, 3:22 PM CDT for Payne County, Oklahoma. It was in force for 53 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: Jul 30, 2018, 3:22 PM CDT (20:22 UTC)
Expired: Jul 30, 2018, 4:15 PM CDT
In force: 53 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Payne County, OK

The radar

The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 103 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: 1525 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 89 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 Jul 30, 3:04 PM CDT, 18 minutes earlier.

Area forecast discussion, Jul 30, 3:04 PM CDT, 18 minutes before

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Hazardous weather outlook, Jul 30, 11:57 AM CDT, 3 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1157 AM CDT Mon Jul 30 2018

OKZ004>048-050>052-TXZ083>090-311700-
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-
1157 AM CDT Mon Jul 30 2018

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

.DAY ONE...Through Tonight...

.Thunderstorms...
There is a Marginal Risk for severe thunderstorms across portions
of north central and central Oklahoma. Isolated to scattered
thunderstorms will be possible through early this evening. The
stronger storms may produce gusty winds and hail.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

.Thunderstorms...
There is a slight chance of thunderstorms over western Oklahoma
and adjacent parts of Texas Wednesday night and Thursday night.

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

Mahale

In the hours before

Special weather statement, Jul 30, 2:18 PM CDT, 1 hour 4 minutes before

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Local storm report, Jul 30, 2:37 PM CDT, 45 minutes before

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Local storm report, Jul 30, 2:47 PM CDT, 35 minutes before

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Local storm report, Jul 30, 2:51 PM CDT, 31 minutes before

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Special weather statement, Jul 30, 2:58 PM CDT, 24 minutes before

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Special weather statement, Jul 30, 3:16 PM CDT, 6 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
Jul 29, 11:10 PM CDT	Special Weather Statement	OUN	Woods	20 min
Jul 29, 11:30 PM CDT	Special Weather Statement	OUN	Woods	30 min
Jul 29, 11:32 PM CDT	Special Weather Statement	OUN	Harper	28 min
Jul 30, 12:00 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	45 min
Jul 30, 12:05 AM CDT	Special Weather Statement	OUN	Ellis, Woodward	25 min
Jul 30, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	45 min
Jul 30, 12:23 AM CDT	Special Weather Statement	OUN	Major	22 min
Jul 30, 12:29 AM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	46 min
Jul 30, 12:43 AM CDT	Severe Thunderstorm Warning	OUN	Major	47 min
Jul 30, 1:07 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Garfield, Kingfisher	53 min
Jul 30, 1:12 AM CDT	Special Weather Statement	OUN	Dewey	33 min
Jul 30, 1:23 AM CDT	Special Weather Statement	OUN	Garfield	22 min
Jul 30, 1:46 AM CDT	Special Weather Statement	OUN	Custer, Dewey	29 min
Jul 30, 1:57 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Kingfisher	48 min
Jul 30, 2:13 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	47 min
Jul 30, 2:15 AM CDT	Special Weather Statement	OUN	Beckham, Custer, Roger Mills, Washita	30 min
Jul 30, 2:26 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, Kingfisher, Logan, McClain and 1 more	79 min
Jul 30, 2:53 AM CDT	Special Weather Statement	OUN	Caddo, Comanche, Grady, Kiowa	37 min
Jul 30, 3:04 AM CDT	Areal Flood Advisory	OUN	Oklahoma	116 min
Jul 30, 3:09 AM CDT	Special Weather Statement	OUN	Johnston	21 min
Jul 30, 3:22 AM CDT	Special Weather Statement	OUN	Coal	23 min
Jul 30, 3:28 AM CDT	Special Weather Statement	OUN	Comanche, Grady	32 min
Jul 30, 3:43 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	62 min
Jul 30, 3:46 AM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma	44 min
Jul 30, 4:00 AM CDT	Special Weather Statement	OUN	Comanche, Garvin, McClain, Stephens	30 min
Jul 30, 4:14 AM CDT	Special Weather Statement	OUN	Tillman	31 min
Jul 30, 4:33 AM CDT	Special Weather Statement	OUN	Murray, Pontotoc, Seminole	27 min
Jul 30, 4:37 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	38 min
Jul 30, 4:41 AM CDT	Special Weather Statement	OUN	Cotton, Jefferson, Stephens	34 min
Jul 30, 4:46 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Pottawatomie, Seminole	44 min
Jul 30, 5:16 AM CDT	Special Weather Statement	OUN	Carter, Johnston, Love, Marshall, Murray	29 min
Jul 30, 5:18 AM CDT	Special Weather Statement	OUN	Jefferson	27 min
Jul 30, 5:29 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Johnston, Pontotoc, Seminole	46 min
Jul 30, 5:50 AM CDT	Special Weather Statement	OUN	Johnston, Love, Marshall	25 min
Jul 30, 6:10 AM CDT	Special Weather Statement	OUN	Atoka, Bryan	35 min
Jul 30, 6:45 AM CDT	Special Weather Statement	OUN	Bryan	45 min
Jul 30, 1:43 PM CDT	Special Weather Statement	OUN	Kay	47 min
Jul 30, 1:52 PM CDT	Severe Thunderstorm Warning	OUN	Kay	53 min
Jul 30, 1:59 PM CDT	Tornado Warning	OUN	Kay	16 min
Jul 30, 2:18 PM CDT	Special Weather Statement	OUN	Grant	42 min
Jul 30, 2:58 PM CDT	Special Weather Statement	OUN	Garfield, Noble	47 min
Jul 30, 3:16 PM CDT	Special Weather Statement	OUN	Payne	29 min
Jul 30, 3:59 PM CDT	Special Weather Statement	OUN	Lincoln	31 min
Jul 30, 5:05 AM CDT	Special Weather Statement	OUN	Clay, Wichita	25 min
Jul 30, 5:20 AM CDT	Special Weather Statement	OUN	Baylor	25 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.