Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 620, NWS Norman, OK

July 14, 2023Ellis County, Harper County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 14, 2023, 6:29 PM CDT for Ellis County, Harper County, Woodward 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
Jul 14, 2023, 6:29 PM CDT (23:29 UTC)
Expired
Jul 14, 2023, 7:15 PM CDT
In force
46 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Ellis County, OK, Harper County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 131 km from the middle of the area, began a volume at 23:33 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.

IssuedProductOfficeLasted
Jul 14, 4:58 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 11.5 hours before the alert went out and 147 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-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2023-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3096 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2023-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3096 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
812 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.2

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 14, 3:39 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jul 14, 3:39 PM CDT, 2 hours 50 minutes before
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Hazardous weather outlook, Jul 14, 3:59 PM CDT, 2 hours 30 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
359 PM CDT Fri Jul 14 2023

OKZ004>048-050>052-TXZ083>090-152100-
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-
359 PM CDT Fri Jul 14 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...
There is an enhanced risk of severe thunderstorms late this
afternoon through late this evening across portions of northern
Oklahoma, with a slight risk of severe thunderstorms further south
late tonight into early Saturday morning near and south of the
I-40 corridor. Large hail up to the size of golf balls will be
possible before sunset across northern OK, but the main hazard
will be damaging wind gusts up to 70 to 80 mph through tonight.

.Heat...
Triple digit heat index values are expected through the early
evening across central and southern Oklahoma, and north Texas.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

.Thunderstorms...
Thunderstorms will be possible on Saturday and Sunday, but the
risk of severe weather currently looks to be low.

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, Jul 14, 5:17 PM CDT, 1 hour 12 minutes before
Special Weather Statement
National Weather Service Norman OK
517 PM CDT Fri Jul 14 2023

OKZ004-142245-
Harper OK-
517 PM CDT Fri Jul 14 2023

...A strong thunderstorm will impact portions of central Harper
County through 545 PM CDT...

At 517 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Laverne, moving east at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Buffalo and Selman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3664 9981 3681 9986 3693 9945 3667 9937
TIME...MOT...LOC 2217Z 257DEG 21KT 3675 9975

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

03
Special weather statement, Jul 14, 5:49 PM CDT, 40 minutes before
Special Weather Statement
National Weather Service Norman OK
549 PM CDT Fri Jul 14 2023

OKZ004-142330-
Harper OK-
549 PM CDT Fri Jul 14 2023

...A strong thunderstorm will impact portions of southwestern Harper
County through 630 PM CDT...

At 549 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles east of Laverne, moving east at 15 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Laverne, Buffalo, and May.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3661 9991 3679 9992 3685 9962 3660 9960
TIME...MOT...LOC 2249Z 266DEG 12KT 3671 9982

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

03

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 7:06 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton39 min
Jul 13, 7:40 PM CDTSpecial Weather StatementOUNJefferson35 min
Jul 13, 8:04 PM CDTSpecial Weather StatementOUNCotton41 min
Jul 13, 8:40 PM CDTSpecial Weather StatementOUNCotton35 min
Jul 13, 8:46 PM CDTSpecial Weather StatementOUNCotton29 min
Jul 13, 8:50 PM CDTSpecial Weather StatementOUNTillman25 min
Jul 13, 8:51 PM CDTSpecial Weather StatementOUNCaddo24 min
Jul 13, 8:59 PM CDTSevere Thunderstorm WarningOUNTillman31 min
Jul 13, 9:02 PM CDTSpecial Weather StatementOUNCanadian28 min
Jul 13, 9:22 PM CDTSevere Thunderstorm WarningOUNCanadian38 min
Jul 13, 9:30 PM CDTSpecial Weather StatementOUNCanadian30 min
Jul 13, 9:32 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman43 min
Jul 13, 9:37 PM CDTAreal Flood AdvisoryOUNComanche, Cotton, Jefferson, Stephens, Tillman3 hr
Jul 13, 9:50 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher40 min
Jul 13, 9:52 PM CDTAreal Flood AdvisoryOUNCaddo, Canadian, Oklahoma4 hr
Jul 13, 10:03 PM CDTSevere Thunderstorm WarningOUNCanadian, Logan, Oklahoma42 min
Jul 13, 10:07 PM CDTSpecial Weather StatementOUNCotton38 min
Jul 13, 10:13 PM CDTFlash Flood WarningOUNCanadian, Oklahoma3 hr
Jul 13, 10:14 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNComanche, Cotton, Tillman46 min
Jul 13, 10:25 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher, Logan, Oklahoma30 min
Jul 13, 10:30 PM CDTAreal Flood AdvisoryOUNOklahoma3 hr
Jul 13, 10:32 PM CDTSpecial Weather StatementOUNTillman43 min
Jul 13, 10:38 PM CDTSpecial Weather StatementOUNComanche52 min
Jul 13, 10:39 PM CDTSpecial Weather StatementOUNLincoln36 min
Jul 13, 11:11 PM CDTSpecial Weather StatementOUNComanche, Cotton, Tillman34 min
Jul 13, 11:13 PM CDTSpecial Weather StatementOUNLincoln47 min
Jul 13, 11:29 PM CDTSpecial Weather StatementOUNTillman46 min
Jul 13, 11:37 PM CDTSpecial Weather StatementOUNStephens38 min
Jul 13, 11:45 PM CDTSpecial Weather StatementOUNComanche45 min
Jul 14, 12:05 AM CDTAreal Flood AdvisoryOUNCleveland, Lincoln, Oklahoma, Pottawatomie, Seminole3 hr
Jul 14, 12:25 AM CDTSpecial Weather StatementOUNSeminole35 min
Jul 14, 12:25 AM CDTSpecial Weather StatementOUNKay35 min
Jul 14, 12:41 AM CDTSevere Thunderstorm WarningOUNHarmon, Jackson64 min
Jul 14, 1:30 AM CDTSpecial Weather StatementOUNJackson60 min
Jul 14, 1:59 AM CDTSpecial Weather StatementOUNComanche, Tillman61 min
Jul 14, 3:13 AM CDTExcessive Heat WarningOUNAtoka, Bryan, Carter, Coal, Jefferson, Johnston and 3 more18 hr
Jul 14, 8:09 AM CDTRiver Flood WarningOUNWoodward5 days
Jul 14, 12:04 PM CDTFlood WatchOUNBlaine, Canadian, Cleveland, Hughes, Kingfisher, Lincoln and 6 more16 hr
Jul 14, 2:06 PM CDTRiver Flood AdvisoryOUNDewey, Major, Woodward7 days
Jul 14, 2:07 PM CDTRiver Flood AdvisoryOUNPottawatomie, Seminole21 hr
Jul 14, 5:16 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNAlfalfa, Grant, Kay59 min
Jul 14, 5:17 PM CDTSpecial Weather StatementOUNHarper28 min
Jul 14, 5:45 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward45 min
Jul 14, 5:49 PM CDTSpecial Weather StatementOUNHarper41 min
Jul 14, 5:56 PM CDTSevere Thunderstorm WarningOUNHarper49 min
Jul 14, 6:11 PM CDTSevere Thunderstorm WarningOUNGrant, Kay, Noble49 min
Jul 14, 6:17 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNWoods43 min
Jul 14, 6:35 PM CDTSpecial Weather StatementOUNWoodward40 min
Jul 14, 6:49 PM CDTSevere Thunderstorm WarningOUNKay, Noble, Payne41 min
Jul 14, 6:55 PM CDTSpecial Weather StatementOUNWoods50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2023Every 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.