Scattered afternoon and evening thunderstorms developed along a cold front across western and northern Oklahoma on the 17th. A meandering upper-level low over the north-central United States increased wind shear near to the Oklahoma-Kansas state line during the evening.
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The episode as NWS OUN wrote it up.
Scattered afternoon and evening thunderstorms developed along a cold front across western and northern Oklahoma on the 17th. A meandering upper-level low over the north-central United States increased wind shear near to the Oklahoma-Kansas state line during the evening. This created conditions that supported a briefly organized thunderstorm, which resulted in reports of large hail.
The local office's own words before the first event, 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 the first event at Sep 17, 11:39 AM CST, 5 hours 29 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Norman OK 1239 PM CDT Wed Sep 17 2025 ...New NEAR TERM, SHORT TERM... .KEY MESSAGES... Updated at 1236 PM CDT Wed Sep 17 2025 - Periods of rain and thunderstorms are expected today in northern and western Oklahoma, with chances moving southward tomorrow and Friday. - Temperatures will cool down briefly late this week and again early next week. && .NEAR TERM... (Rest of today and tonight) Issued at 1236 PM CDT Wed Sep 17 2025 Key Point: Storms are likely along and north of a boundary across northwest Oklahoma this afternoon. Meteorological Discussion: With rain moving through the area, surface analysis is rather messy showing multiple weak boundaries across northern Oklahoma / Kansas / the panhandles. The upper low will be a driving mechanism for scattered showers and storms this afternoon and evening, focusing the highest PoPs in northwest Oklahoma. Most CAMs don't start this back up until after 3pm. HREF suggest around 1500 joules of CAPE and no more than about 30 knots of effective bulk shear, allowing for the possibility of a few brief strong to severe storms (with wind as the primary threat). Instability will wane quickly in the evening, but additional showers will be possible overnight into tomorrow morning. Day && .SHORT TERM... (Thursday through Friday night) Issued at 1236 PM CDT Wed Sep 17 2025 Key Points: Scattered storm chances continue on Thursday with a cooldown into Friday. Meteorological Discussion: Scattered showers and storms will continue across northern Oklahoma through Thursday as the upper low shifts eastward. This will keep temperatures cooler (upper 70s / lower 80s) across this area. Additional outflow will provide some support for showers into southern Oklahoma Thursday night into early Friday. Temperatures will be a bit more uniform across the area on Friday (mid 80s to lower 90s) behind these boundaries. Day && .LONG TERM... (Saturday through Tuesday) Issued at 1239 AM CDT Wed Sep 17 2025 Key Points: Daily rain chances continue into early next week, when another cooldown is likely to occur. Meteorological Discussion: Although the initial trough across the Plains is expected to lift out of the reach of our area, full ridging is not likely to return. This is because the subtropical ridge will redevelop further west across the northern Mexican highlands, leaving us in a northwest flow zone on its northeast periphery. Because of that, at least low (20-40) percent chances of rain are expected on both days this weekend, especially along and southeast of I-44. Temperatures are likely to warm up some and settle back in above normal. A pattern flip is likely beginning on Monday as one of the first true fall troughs of the year translates eastward across the northern Plains. Though most of the troughing will miss us to the north, global guidance shows a cutoff low developing at its base. That will help cool off our temperatures on Monday and Tuesday and bring in more rain chances. We might finally begin to dry out on Wednesday as the cutoff low starts to wander east. Meister && .AVIATION... (18Z TAFS) Issued at 1221 PM CDT Wed Sep 17 2025 Predominately VFR category is expected at all terminals through the period. Isolated to scattered coverage of showers and thunderstorms is expected across northwestern Oklahoma this afternoon and evening (after ~19-20 UTC). This activity may impact KWWR (at least for a time), offering potential for lowered vis and gusty and erratic winds. There is some potential this activity spreads as far southward as KCSM near sunset, though uncertainty is high enough to preclude highlights. Scattered rain/storms will continue to spread slowly south and east early on Thursday morning, with low probability potential for terminal impact after daybreak at KPNC/KSWO. A weak surface front, likely enhanced by convection this evening, will move southward across the area on Thursday morning as well. This will offer a more sustained north/northwesterly wind shift at northern and central Oklahoma terminals. Safe travels! Ungar && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 68 86 64 86 / 10 30 50 20 Hobart OK 66 89 62 90 / 20 30 40 10 Wichita Falls TX 69 91 66 91 / 0 20 30 20 Gage OK 60 76 57 84 / 60 50 20 10 Ponca City OK 66 84 62 86 / 30 40 50 10 Durant OK 69 93 68 89 / 0 20 50 40 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && NEAR TERM...14 SHORT TERM...14 LONG TERM....04 AVIATION...09
Special Weather Statement
National Weather Service Norman OK
451 PM CDT Wed Sep 17 2025
OKZ009-172215-
Ellis OK-
451 PM CDT Wed Sep 17 2025
...A strong thunderstorm will impact portions of northwestern Ellis
County through 515 PM CDT...
At 450 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles east of Follett, moving northeast at 35 mph.
HAZARD...Wind gusts up to 50 mph and pea 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...
Catesby.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3658 10000 3660 9998 3659 9965 3654 9960
3650 9961 3635 10000 3655 10001
TIME...MOT...LOC 2150Z 236DEG 29KT 3645 10002
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
MahaleSpecial Weather Statement
National Weather Service Norman OK
603 PM CDT Wed Sep 17 2025
OKZ004-172330-
Harper OK-
603 PM CDT Wed Sep 17 2025
...A strong thunderstorm will impact portions of northwestern Harper
County through 630 PM CDT...
At 603 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Rosston, moving northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Buffalo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3700 9958 3681 9958 3675 9987 3692 9996
3700 9976
TIME...MOT...LOC 2303Z 246DEG 18KT 3687 9983
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
..speg.The Dodge City radar (KDDC), 95 km away, was scanning. The volume nearest the first event began at 23:09 UTC.
1 hail. Local standard time, as filed.
The Comanche County, Kansas Emergency Management Agency relayed a report of hailfall along the Oklahoma-Kansas border.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2025Every state in 2025This day in weather historyWarnings in Oklahoma, September 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1290046.