A lingering convective complex from the prior evening (9th), along with modest warm ascent, fostered continued strong thunderstorm activity across portions of southern Oklahoma during the morning of the 10th. A few stronger thunderstorm cores produced reports of small hail.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OUN wrote it up.
A lingering convective complex from the prior evening (9th), along with modest warm ascent, fostered continued strong thunderstorm activity across portions of southern Oklahoma during the morning of the 10th. A few stronger thunderstorm cores produced reports of small 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 May 10, 5:29 AM CST, 2 hours 16 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Norman OK 629 AM CDT Sun May 10 2026 ...New AVIATION... .KEY MESSAGES... Updated at 559 AM CDT Sun May 10 2026 - Potential for strong-severe storms and heavy rainfall/flooding through Sunday morning. - Hot, well-above average temperatures are expected into next week. && .NEAR TERM... (Through Sunday) Issued at 127 AM CDT Sun May 10 2026 A few strong to severe storms continue across parts of central and southern Oklahoma early this morning. A weak surface low across southeast New Mexico and inverted surface trough/cold front across northwest Oklahoma will gradually shift south and east across the area overnight into Sunday morning. In addition an outflow boundary from convection has moved south of the Red River. There remains some chance of severe storms mainly across southern Oklahoma into north Texas through the morning hours. Additional elevated showers and storms are expected to develop late tonight into Sunday morning farther north across central and northern Oklahoma with the aid of strong low level jet and isentropic assent. This activity will likely continue through the morning and into the afternoon hours before gradually shifting south late in the day as upper trough axis continue to move southeast into the central and southern Plains. This additional rainfall could also result in some isolated areas of flooding, especially in urban areas. Otherwise, cloudy, breezy and cooler today with highs in the afternoon only climbing into the upper 60s and low to mid 70s across much of the area. Still may see a few 80s in our western north Texas counties. && .SHORT TERM... (Sunday night through Tuesday night) Issued at 127 AM CDT Sun May 10 2026 The aforementioned trough axis will continue to push southeast with some lingering showers and storms across southern Oklahoma and western north Texas through the first half of the night. As the trough moves through, skies will clear from northwest to southeast. Light winds and a drier airmass will allow temperatures to drop to near 40 degrees in far northwest Oklahoma with 50s along and south of I-44. Pleasant conditions expected Monday with sunny skies, light winds and temperatures climbing into the mid 70s to lower 80s. Upper heights begin to rise as upper ridge begins to build out into the Plains from the southwest bringing much warmer temperatures for Tuesday. && .LONG TERM... (Wednesday through Saturday) Issued at 127 AM CDT Sun May 10 2026 Upper ridge will remain in control through Thursday before a couple of upper shortwaves break it down. In advance of the initial wave, lee troughing will result in increasing south winds Wednesday night and Thursday. The gusty south winds will combine with hot temperatures and low afternoon humidity to result in elevated to near critical fire weather conditions across western Oklahoma Thursday afternoon. The strong, gusty south winds will continue both Friday into Saturday with only minimal rain chances and hot afternoon temperatures. Fire weather conditions will also remain elevated across far western and northwestern Oklahoma where vegetation remains in a transition phase due to lack of precipitation. A stronger longwave trough moves through the central part of the country by Saturday dragging a cold front into the area, which may bring temperatures down at least a few degrees and also bring a chance of rain. && .AVIATION... (12Z TAFS) Issued at 559 AM CDT Sun May 10 2026 Showers & thunderstorms will continue forming along to ahead of a cold front currently stretched across northern Oklahoma. Have TEMPO groups for TSRA at all of our terminals through 21Z with periods of convection and showers with lowering ceilings and reduced visibilities in rain will result in many of our terminals degrading to at least an MVFR category for some periods through the morning with a few of them lowering to an IFR category in very low stratus. Much of this convective shower activity may be along and south of the I-40 corridor where the surface boundary/cold front will be. There is a north wind shift behind the cold front although rather diffuse and weak as storm outflow may keep surface winds variable and gusty as times. Expecting rain/storm activity to be near and south of the Red River after 00Z as most of our terminals will start drying out with light northerly winds overnight. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 69 50 76 54 / 100 10 0 0 Hobart OK 72 49 80 54 / 80 10 0 0 Wichita Falls TX 78 54 80 55 / 80 30 0 0 Gage OK 68 41 79 53 / 80 0 0 0 Ponca City OK 72 46 77 52 / 60 0 0 0 Durant OK 77 59 77 55 / 90 70 10 0 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && NEAR TERM...30 SHORT TERM...30 LONG TERM....30 AVIATION...68
Special Weather Statement
National Weather Service Norman OK
629 AM CDT Sun May 10 2026
OKZ024-025-101200-
Oklahoma OK-Canadian OK-
629 AM CDT Sun May 10 2026
...A strong thunderstorm will impact portions of northwestern
Oklahoma and east central Canadian Counties through 700 AM CDT...
At 629 AM CDT, Doppler radar was tracking a strong thunderstorm over
northwestern Oklahoma City, moving east at 15 mph.
HAZARD...Half inch hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Northern Oklahoma City, Edmond, Yukon, Warr Acres, The Village,
Piedmont, Nichols Hills, and Downtown Edmond.
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 3555 9736 3554 9773 3566 9775 3573 9748
3572 9742
TIME...MOT...LOC 1129Z 248DEG 13KT 3561 9757
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<30 MPH
MahaleSpecial Weather Statement
National Weather Service Norman OK
640 AM CDT Sun May 10 2026
OKZ023-027-101215-
Grady OK-Caddo OK-
640 AM CDT Sun May 10 2026
...A strong thunderstorm will impact portions of northwestern Grady
and east central Caddo Counties through 715 AM CDT...
At 640 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles northeast of Lake Chickasha, moving east at 15 mph.
HAZARD...Nickel size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Minco, Amber, Pocasset, and Lake Chickasha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3536 9799 3535 9796 3535 9795 3537 9795
3538 9794 3536 9793 3535 9790 3516 9785
3515 9820 3526 9823
TIME...MOT...LOC 1140Z 247DEG 13KT 3520 9809
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH
MahaleSpecial Weather Statement
National Weather Service Norman OK
653 AM CDT Sun May 10 2026
OKZ041-042-047-101230-
Johnston OK-Pontotoc OK-Murray OK-
653 AM CDT Sun May 10 2026
...A strong thunderstorm will impact portions of north central
Johnston, southwestern Pontotoc and northeastern Murray Counties
through 730 AM CDT...
At 653 AM CDT, Doppler radar was tracking a strong thunderstorm near
Roff, moving east at 20 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Sulphur, Roff, Fitzhugh, Hickory, Scullin, and Fittstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3445 9665 3453 9700 3464 9696 3464 9693
3465 9690 3469 9659
TIME...MOT...LOC 1153Z 270DEG 17KT 3460 9688
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
MahaleSpecial Weather Statement
National Weather Service Norman OK
719 AM CDT Sun May 10 2026
OKZ028-029-101245-
Cleveland OK-McClain OK-
719 AM CDT Sun May 10 2026
...A strong thunderstorm will impact portions of southeastern
Cleveland and southwestern McClain Counties through 745 AM CDT...
At 719 AM CDT, Doppler radar was tracking a strong thunderstorm near
Purcell, moving east at 20 mph.
HAZARD...Wind gusts of 30 mph and half inch 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...
Purcell, Slaughterville, Lexington, Wayne, Washington, and Rosedale.
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 3486 9721 3491 9754 3507 9748 3511 9715
3486 9714
TIME...MOT...LOC 1219Z 270DEG 16KT 3497 9736
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH
MahaleSpecial Weather Statement
National Weather Service Norman OK
722 AM CDT Sun May 10 2026
OKZ041-042-101245-
Pontotoc OK-Murray OK-
722 AM CDT Sun May 10 2026
...A strong thunderstorm will impact portions of southwestern
Pontotoc and northeastern Murray Counties through 745 AM CDT...
At 722 AM CDT, Doppler radar was tracking a strong thunderstorm near
Roff, moving east at 20 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Roff, Fitzhugh, Hickory, Scullin, and Fittstown.
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 3451 9659 3451 9690 3456 9706 3462 9701
3464 9696 3464 9693 3471 9690 3473 9658
TIME...MOT...LOC 1222Z 270DEG 16KT 3461 9687
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
MahaleSpecial Weather Statement National Weather Service Norman OK 842 AM CDT Sun May 10 2026 OKZ041-046-047-101415- Carter OK-Johnston OK-Murray OK- 842 AM CDT Sun May 10 2026 ...A strong thunderstorm will impact portions of west central Johnston, southeastern Carter and southeastern Murray Counties through 915 AM CDT... At 842 AM CDT, Doppler radar was tracking a strong thunderstorm near Ardmore, moving northeast at 30 mph. HAZARD...Nickel size hail. SOURCE...Radar indicated. IMPACT...Minor damage to outdoor objects is possible. Locations impacted include... Ardmore, Dickson, Gene Autry, and northwestern Lake Murray. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. This storm may intensify, so be certain to monitor NOAA Weather Radio, local radio stations or available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3411 9714 3422 9720 3444 9691 3424 9681 TIME...MOT...LOC 1342Z 236DEG 27KT 3421 9711 MAX HAIL SIZE...0.88 IN MAX WIND GUST...<30 MPH Mahale
The Norman radar (KTLX), 128 km away, was scanning. The volume nearest the first event began at 13:46 UTC.
1 hail. Local standard time, as filed.
An image was shared on social media. The location is approximate, and the event time is estimated based on radar observations.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2026Every state in 2026This day in weather historyWarnings in Oklahoma, May 2026
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: 1342504.