Alert archive / Oklahoma / Flash Flood Warnings in 2023

Flash Flood Warning 39, NWS Norman, OK

July 11, 2023Garvin County, Murray County, Pontotoc County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 11, 2023, 4:13 AM CDT for Garvin County, Murray County, Pontotoc County, Oklahoma. It was in force for 5 hr. 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, 4:13 AM CDT (09:13 UTC)
Expired: Jul 11, 2023, 9:15 AM CDT
In force: 5 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Garvin County, OK, Murray County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 09:15 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, 9.2 hours before the alert went out and 73 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 flash flood 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 flash flood warning went out at Jul 11, 3:17 AM CDT, 56 minutes earlier.

Area forecast discussion, Jul 11, 3:17 AM CDT, 56 minutes before

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Hazardous weather outlook, Jul 10, 3:06 PM CDT, 13 hours 7 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
306 PM CDT Mon Jul 10 2023

OKZ004>048-050>052-TXZ083>090-112015-
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-
306 PM CDT Mon Jul 10 2023

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

.DAY ONE...This Afternoon and Tonight...

.Thunderstorms...
Widely scattered thunderstorms are expected to move off the High
Plains and into portions of western Oklahoma and western-north
Texas late this evening. Activity will transition towards central
Oklahoma by early Tuesday morning (after 12 AM). Severe weather
chances will exist with this activity, with damaging winds and
perhaps a few instances of large hail being possible.

.Heavy Rainfall...
In addition to the severe weather potential, heavy rainfall will
be possible from western-north Texas into central Oklahoma. Flash
flooding will also be possible, especially in areas that have
received recent heavy rains.

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

.Thunderstorms...
There are chances for thunderstorms across northern Oklahoma on
Wednesday night as well as Thursday night. Additional chances
will exist over a larger area of Oklahoma and into portions of
north Texas on Friday into next weekend.

.Excessive Heat...
Dangerous heat indices will be possible during the afternoon and
evening hours on Tuesday and continue through much of the week,
especially 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, 2:28 AM CDT, 1 hour 45 minutes before

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Special weather statement, Jul 11, 2:33 AM CDT, 1 hour 40 minutes before

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Local storm report, Jul 11, 2:38 AM CDT, 1 hour 35 minutes before

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Local storm report, Jul 11, 2:48 AM CDT, 1 hour 25 minutes before

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Local storm report, Jul 11, 3:22 AM CDT, 51 minutes before

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Local storm report, Jul 11, 3:50 AM 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
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, 4:18 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, 5:14 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall, Murray	46 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

Flash Flood Warnings in Oklahoma, 2023 Every flash flood 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.