Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 620, NWS Norman, OK
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 14, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 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.
- 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
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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</html>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
03Special 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
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:06 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton | 39 min |
| Jul 13, 7:40 PM CDT | Special Weather Statement | OUN | Jefferson | 35 min |
| Jul 13, 8:04 PM CDT | Special Weather Statement | OUN | Cotton | 41 min |
| Jul 13, 8:40 PM CDT | Special Weather Statement | OUN | Cotton | 35 min |
| Jul 13, 8:46 PM CDT | Special Weather Statement | OUN | Cotton | 29 min |
| Jul 13, 8:50 PM CDT | Special Weather Statement | OUN | Tillman | 25 min |
| Jul 13, 8:51 PM CDT | Special Weather Statement | OUN | Caddo | 24 min |
| Jul 13, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 31 min |
| Jul 13, 9:02 PM CDT | Special Weather Statement | OUN | Canadian | 28 min |
| Jul 13, 9:22 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 38 min |
| Jul 13, 9:30 PM CDT | Special Weather Statement | OUN | Canadian | 30 min |
| Jul 13, 9:32 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 43 min |
| Jul 13, 9:37 PM CDT | Areal Flood Advisory | OUN | Comanche, Cotton, Jefferson, Stephens, Tillman | 3 hr |
| Jul 13, 9:50 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher | 40 min |
| Jul 13, 9:52 PM CDT | Areal Flood Advisory | OUN | Caddo, Canadian, Oklahoma | 4 hr |
| Jul 13, 10:03 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Logan, Oklahoma | 42 min |
| Jul 13, 10:07 PM CDT | Special Weather Statement | OUN | Cotton | 38 min |
| Jul 13, 10:13 PM CDT | Flash Flood Warning | OUN | Canadian, Oklahoma | 3 hr |
| Jul 13, 10:14 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 46 min |
| Jul 13, 10:25 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher, Logan, Oklahoma | 30 min |
| Jul 13, 10:30 PM CDT | Areal Flood Advisory | OUN | Oklahoma | 3 hr |
| Jul 13, 10:32 PM CDT | Special Weather Statement | OUN | Tillman | 43 min |
| Jul 13, 10:38 PM CDT | Special Weather Statement | OUN | Comanche | 52 min |
| Jul 13, 10:39 PM CDT | Special Weather Statement | OUN | Lincoln | 36 min |
| Jul 13, 11:11 PM CDT | Special Weather Statement | OUN | Comanche, Cotton, Tillman | 34 min |
| Jul 13, 11:13 PM CDT | Special Weather Statement | OUN | Lincoln | 47 min |
| Jul 13, 11:29 PM CDT | Special Weather Statement | OUN | Tillman | 46 min |
| Jul 13, 11:37 PM CDT | Special Weather Statement | OUN | Stephens | 38 min |
| Jul 13, 11:45 PM CDT | Special Weather Statement | OUN | Comanche | 45 min |
| Jul 14, 12:05 AM CDT | Areal Flood Advisory | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole | 3 hr |
| Jul 14, 12:25 AM CDT | Special Weather Statement | OUN | Seminole | 35 min |
| Jul 14, 12:25 AM CDT | Special Weather Statement | OUN | Kay | 35 min |
| Jul 14, 12:41 AM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 64 min |
| Jul 14, 1:30 AM CDT | Special Weather Statement | OUN | Jackson | 60 min |
| Jul 14, 1:59 AM CDT | Special Weather Statement | OUN | Comanche, Tillman | 61 min |
| Jul 14, 3:13 AM CDT | Excessive Heat Warning | OUN | Atoka, Bryan, Carter, Coal, Jefferson, Johnston and 3 more | 18 hr |
| Jul 14, 8:09 AM CDT | River Flood Warning | OUN | Woodward | 5 days |
| Jul 14, 12:04 PM CDT | Flood Watch | OUN | Blaine, Canadian, Cleveland, Hughes, Kingfisher, Lincoln and 6 more | 16 hr |
| Jul 14, 2:06 PM CDT | River Flood Advisory | OUN | Dewey, Major, Woodward | 7 days |
| Jul 14, 2:07 PM CDT | River Flood Advisory | OUN | Pottawatomie, Seminole | 21 hr |
| Jul 14, 5:16 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant, Kay | 59 min |
| Jul 14, 5:17 PM CDT | Special Weather Statement | OUN | Harper | 28 min |
| Jul 14, 5:45 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 45 min |
| Jul 14, 5:49 PM CDT | Special Weather Statement | OUN | Harper | 41 min |
| Jul 14, 5:56 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 49 min |
| Jul 14, 6:11 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay, Noble | 49 min |
| Jul 14, 6:17 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 43 min |
| Jul 14, 6:35 PM CDT | Special Weather Statement | OUN | Woodward | 40 min |
| Jul 14, 6:49 PM CDT | Severe Thunderstorm Warning | OUN | Kay, Noble, Payne | 41 min |
| Jul 14, 6:55 PM CDT | Special Weather Statement | OUN | Woods | 50 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.