Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 593, NWS Norman, OK

July 11, 20235 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 11, 2023, 5:14 AM CDT for 5 counties in 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: Jul 11, 2023, 5:14 AM CDT (10:14 UTC)
Expired: Jul 11, 2023, 6:00 AM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carter County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK

The radar

The Norman radar (KTLX), 128 km from the middle of the area, began a volume at 10:15 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, 10.2 hours before the alert went out and 118 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: 1640 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 1234 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

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 Jul 11, 3:17 AM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jul 11, 3:17 AM CDT, 1 hour 57 minutes before

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Hazardous weather outlook, Jul 11, 4:42 AM CDT, 32 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
442 AM CDT Tue Jul 11 2023

OKZ004>048-050>052-TXZ083>090-120945-
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-
442 AM CDT Tue Jul 11 2023

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

.DAY ONE...Today and Tonight...

.Thunderstorms...
Thunderstorms will be ongoing this morning across central through
southeast Oklahoma. Hail up to quarter size, damaging wind gusts,
and flooding will remain the severe hazards through sunrise, with
the severe threat decreasing afterwards.

.Excessive Heat...
Dangerous heat will be starting this afternoon into the early
evening across southern Oklahoma and western north Texas with heat
indices approaching 110 degrees.

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

.Thunderstorms...
There are chances of thunderstorms Wednesday and Thursday nights
across portions of northern Oklahoma. Some of the storms on
Wednesday night could be severe with large hail and damaging wind
gusts as the severe hazards. Thunderstorm chances continue Friday
into through Sunday night.

.Excessive Heat...
Dangerous triple digit heat indices will be possible during the
afternoon and early evening hours on Wednesday through Friday
across a more widespread part of our area, with the highest heat
indices across southern Oklahoma and western north Texas.

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, Jul 11, 4:47 AM CDT, 27 minutes before

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Special weather statement, Jul 11, 4:53 AM CDT, 21 minutes before

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Local storm report, Jul 11, 4:56 AM CDT, 18 minutes before

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Local storm report, Jul 11, 5:01 AM CDT, 13 minutes before

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Local storm report, Jul 11, 5:08 AM CDT, 6 minutes before

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Local storm report, Jul 11, 5:12 AM CDT, 2 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 10, 11:55 PM CDT	Special Weather Statement	OUN	Kingfisher	35 min
Jul 11, 12:07 AM CDT	Special Weather Statement	OUN	Roger Mills	23 min
Jul 11, 12:09 AM CDT	Special Weather Statement	OUN	Kingfisher	21 min
Jul 11, 12:31 AM CDT	Special Weather Statement	OUN	Kingfisher	14 min
Jul 11, 12:33 AM CDT	Special Weather Statement	OUN	Dewey	27 min
Jul 11, 12:58 AM CDT	Special Weather Statement	OUN	Logan	32 min
Jul 11, 12:58 AM CDT	Special Weather Statement	OUN	Washita	32 min
Jul 11, 1:01 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	44 min
Jul 11, 1:13 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	47 min
Jul 11, 1:21 AM CDT	Special Weather Statement	OUN	Murray	24 min
Jul 11, 1:23 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	52 min
Jul 11, 1:31 AM CDT	Special Weather Statement	OUN	Lincoln	29 min
Jul 11, 1:42 AM CDT	Special Weather Statement	OUN	Custer	33 min
Jul 11, 1:47 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie	23 min
Jul 11, 1:49 AM CDT	Special Weather Statement	OUN	Murray	26 min
Jul 11, 1:55 AM CDT	Flash Flood Warning	OUN	Kingfisher, Lincoln, Logan, Oklahoma	5 hr
Jul 11, 1:57 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Dewey, Washita	48 min
Jul 11, 1:58 AM CDT	Flash Flood Warning	OUN	Custer, Dewey	5 hr
Jul 11, 2:03 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	27 min
Jul 11, 2:14 AM CDT	Special Weather Statement	OUN	Kingfisher	31 min
Jul 11, 2:22 AM CDT	Flash Flood Warning	OUN	Canadian, Oklahoma	5 hr
Jul 11, 2:23 AM CDT	Special Weather Statement	OUN	Pontotoc	37 min
Jul 11, 2:25 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Grady, Kingfisher, Washita	50 min
Jul 11, 2:33 AM CDT	Special Weather Statement	OUN	Pottawatomie	27 min
Jul 11, 2:37 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie, Seminole	53 min
Jul 11, 2:42 AM CDT	Areal Flood Advisory	OUN	Lincoln, Pottawatomie, Seminole	3 hr
Jul 11, 2:46 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	23 min
Jul 11, 2:47 AM CDT	Severe Thunderstorm Warning	OUN	Johnston, Murray, Pontotoc	23 min
Jul 11, 2:52 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pontotoc, Pottawatomie	38 min
Jul 11, 2:54 AM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian, Grady, Kingfisher, McClain	3 hr
Jul 11, 2:58 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	25 min
Jul 11, 3:00 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Cleveland, Grady, McClain, Oklahoma	45 min
Jul 11, 3:05 AM CDT	Areal Flood Advisory	OUN	Blaine, Kingfisher	3 hr
Jul 11, 3:11 AM CDT	Flash Flood Warning	OUN	Cleveland, Coal, Garvin, Hughes, Johnston, McClain and 5 more	6 hr
Jul 11, 3:41 AM CDT	Flash Flood Warning Considerable damage threat	OUN	Oklahoma	3 hr
Jul 11, 3:42 AM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	33 min
Jul 11, 3:59 AM CDT	Areal Flood Advisory	OUN	Garfield	3 hr
Jul 11, 4:13 AM CDT	Flash Flood Warning Considerable damage threat	OUN	Garvin, Murray, Pontotoc	5 hr
Jul 11, 4:18 AM CDT	Flash Flood Warning	OUN	Carter, Cleveland, Garvin, Grady, McClain, Murray and 2 more	3 hr
Jul 11, 4:22 AM CDT	Severe Thunderstorm Warning	OUN	Johnston, Murray, Pontotoc	38 min
Jul 11, 4:46 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Murray	44 min
Jul 11, 4:53 AM CDT	Special Weather Statement	OUN	Grady	37 min
Jul 11, 5:02 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	58 min
Jul 11, 5:47 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	58 min
Jul 11, 6:14 AM CDT	River Flood Advisory	OUN	Pottawatomie, Seminole	3 hr
Jul 11, 6:30 AM CDT	Areal Flood Warning	OUN	Blaine, Caddo, Canadian, Custer, Dewey, Kingfisher	3 hr
Jul 11, 6:48 AM CDT	Areal Flood Warning	OUN	Logan, Oklahoma	6 hr
Jul 11, 6:53 AM CDT	River Flood Advisory	OUN	Blaine, Canadian	117 min
Jul 11, 7:28 AM CDT	Areal Flood Warning	OUN	Carter, Cleveland, Garvin, McClain, Murray, Pottawatomie and 1 more	107 min
Jul 11, 8:52 AM CDT	River Flood Warning	OUN	Blaine, Canadian	6 hr
Jul 11, 8:56 AM CDT	River Flood Advisory	OUN	Canadian, Oklahoma	30 hr
Jul 11, 8:58 AM CDT	River Flood Advisory	OUN	Oklahoma	6 hr
Jul 11, 9:00 AM CDT	River Flood Warning	OUN	Lincoln, Oklahoma, Pottawatomie	11 hr
Jul 11, 9:02 AM CDT	Areal Flood Warning	OUN	Carter, Coal, Garvin, Johnston, Murray, Pontotoc	4 hr
Jul 11, 9:03 AM CDT	River Flood Warning	OUN	Blaine, Caddo, Canadian, Custer	29 hr
Jul 11, 9:06 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	11 hr
Jul 11, 9:25 AM CDT	River Flood Advisory	OUN	Atoka	48 hr
Jul 11, 9:46 AM CDT	River Flood Warning	OUN	Payne	48 hr
Jul 11, 2:10 PM CDT	Heat Advisory	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more	13 hr
Jul 11, 2:20 PM CDT	River Flood Warning	OUN	Woodward	24 hr
Jul 11, 2:31 PM CDT	River Flood Advisory	OUN	Cleveland, McClain	19 hr
Jul 11, 2:56 PM CDT	River Flood Advisory	OUN	Kingfisher, Logan	24 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2023 Every severe thunderstorm warning in 2023

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.