Flash Flood and Hail in Oklahoma, June 18, 2026

Name: Flash Flood and Hail in Oklahoma, June 18, 2026
Start: 2026-06-18T08:26
End: 2026-06-18T15:00
Location: Oklahoma

June 18, 2026 · NWS OUN · 8 events in 2 counties and zones

A strong and persistent warm air advection pattern atop a surface front fostered scattered thunderstorm activity for most of the morning into the afternoon on the 18th across north-central Oklahoma. Sufficient wind shear and (elevated) instability allowed for occasional large hail concern with the strongest thunderstorms.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $2,000
Crop damage: None recorded
Events: 8

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.

What happened

The episode as NWS OUN wrote it up.

What forecasters said that day

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 Jun 18, 4:59 AM CST, 3 hours 27 minutes earlier. Its key messages:

Updated at 556 AM CDT Thu Jun 18 2026
Hot again in southern Oklahoma and north Texas this afternoon.
Marginal risk for strong to severe storms this evening through Friday morning.
Heavy rain Thursday night could lead to localized flooding.

Area forecast discussion, Jun 18, 4:59 AM CST, 3 hours 27 minutes before

Area Forecast Discussion
National Weather Service Norman OK
559 AM CDT Thu Jun 18 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 556 AM CDT Thu Jun 18 2026

- Hot again in southern Oklahoma and north Texas this afternoon.

- Marginal risk for strong to severe storms this evening through
  Friday morning.

- Heavy rain Thursday night could lead to localized flooding.

&&

.NEAR TERM...
(Through Thursday)
Issued at 127 AM CDT Thu Jun 18 2026

Weather impacts today will be driven by a cold front gliding
southward through the area, yielding impactful heat across southern
Oklahoma and north Texas and thunderstorm chances / cooler
temperatures spreading from north to south with the front.

Heat: While northern Oklahoma will get relief from yesterday's heat
(highs in the 80s), southern Oklahoma and north Texas will see a
thermal ridge develop ahead of the front this afternoon. Timing of
the front will determine the northward extent of heat impacts--our
heat advisory has been updated to accord with the latest HREF
guidance. The highest heat indices will be in western north Texas.

Storms: The setup today and tonight is somewhat messy. Early in the
day there is a weak signal for isentropic showers along and north of
the front. The signal in the CAMs is fairly weak, but the
environment could support some elevated strong storms.

Toward late afternoon / early evening diurnal heating will lend its
support to storm initiation. This could result in surface based
storms (including severe risk) in southern Oklahoma and north Texas
along the front. CAMs particularly seem to favor western north Texas
for storm initiation where afternoon heating will be the strongest.

Moving into the night, additional storms are likely behind the front
as a modest low level jet increases. Elevated instability is
forecast to remain sufficient to sustain a severe risk through the
night. Single / multi-cell clusters will yield primarily a hail
threat, potentially evolving into a wind threat as storms evolve
into an MCS.

Additionally, heavy rainfall will yield a flooding threat overnight
generally near and south of I-40. HREF shows up to a 50% probability
of 3 inches in 3 hours over parts of south central / central
Oklahoma.

Day

&&

.SHORT TERM...
(Thursday night through Saturday night)
Issued at 127 AM CDT Thu Jun 18 2026

Showers and storms are likely to linger into Friday morning across
parts of southern Oklahoma and north Texas. Highs on Friday
afternoon should even out in the 80s.

Northwest to zonal flow aloft will keep us in a somewhat active
pattern into the weekend, though model agreement for rain chances is
low.

Day

&&

.LONG TERM...
(Sunday through Wednesday)
Issued at 127 AM CDT Thu Jun 18 2026

Active pattern continues into early next week. Sunday looks to bring
a return of impactful heat under mostly sunny skies. This will be
ahead of a front moving in Sunday night, which will bring with it
significant rain chances. Outside of Sunday, temperatures should
hover near normal.

Day

&&

.AVIATION...
(12Z TAFS)
Issued at 556 AM CDT Thu Jun 18 2026

Expect to continue to see an expansion of MVFR ceilings this
morning, which will likely continue through the morning hours
before ceiling lift to VFR across much of the area. Also expected
some showers and thunderstorms across the north and portions of
the west this morning with perhaps a lull this afternoon before
showers and thunderstorms become more widespread overnight into
Friday morning. South winds will shift to the east and northeast
as a front works through the area today and tonight.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  82  67  85  70 /  30  70  50  40
Hobart OK         85  65  87  69 /  30  90  40  40
Wichita Falls TX  98  69  88  71 /  20  80  50  40
Gage OK           75  62  86  67 /  40  40  30  40
Ponca City OK     73  65  84  69 /  70  40  30  40
Durant OK         94  75  87  74 /   0  70  70  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Heat Advisory from 1 PM this afternoon to 8 PM CDT this evening
     for OKZ037-039-044>048-050>052.

TX...Heat Advisory from 1 PM this afternoon to 8 PM CDT this evening
     for TXZ084>090.

&&

NEAR TERM...14
SHORT TERM...14
LONG TERM....14
AVIATION...30

In the hours before

Special weather statement, Jun 18, 5:54 AM CST, 2 hours 32 minutes before

Special Weather Statement
National Weather Service Norman OK
654 AM CDT Thu Jun 18 2026

OKZ008-181230-
Kay OK-
654 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of northeastern Kay
County through 730 AM CDT...

At 653 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles northwest of Hardy, moving east at 20 mph. Although the storm
will primarily remain in Kansas, strong winds from the storm may
affect northeastern Kay County near Hardy.

HAZARD...Wind gusts of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Hardy.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3690 9675 3694 9695 3700 9694 3700 9675
TIME...MOT...LOC 1153Z 276DEG 19KT 3702 9685

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

..speg.

Special weather statement, Jun 18, 6:41 AM CST, 1 hour 45 minutes before

Special Weather Statement
National Weather Service Norman OK
741 AM CDT Thu Jun 18 2026

OKZ007-181315-
Grant OK-
741 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of southern Grant
County through 815 AM CDT...

At 741 AM CDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Nash, moving east at 40 mph.

HAZARD...Wind gusts of 40 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...
Medford, Pond Creek, and Jefferson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3682 9756 3659 9770 3659 9771 3669 9810
      3683 9811
TIME...MOT...LOC 1241Z 280DEG 37KT 3675 9799

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

..speg.

Special weather statement, Jun 18, 7:13 AM CST, 1 hour 13 minutes before

Special Weather Statement
National Weather Service Norman OK
813 AM CDT Thu Jun 18 2026

OKZ008-013-181345-
Kay OK-Noble OK-
813 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of southwestern Kay and
north central Noble Counties through 845 AM CDT...

At 813 AM CDT, Doppler radar was tracking a strong thunderstorm near
Tonkawa, moving east at 30 mph.

HAZARD...Wind gusts of 40 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...
Tonkawa, and Marland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3669 9706 3666 9706 3664 9705 3661 9705
      3660 9704 3659 9706 3658 9701 3645 9705
      3660 9743 3673 9739
TIME...MOT...LOC 1313Z 281DEG 27KT 3663 9731

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

..speg.

Special weather statement, Jun 18, 7:14 AM CST, 1 hour 12 minutes before

Special Weather Statement
National Weather Service Norman OK
814 AM CDT Thu Jun 18 2026

OKZ007-181345-
Grant OK-
814 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of southern Grant
County through 845 AM CDT...

At 814 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles northwest of Pond Creek, moving east-southeast at 30 mph.

HAZARD...Wind gusts of 40 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...
Pond Creek and Jefferson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3675 9757 3659 9761 3659 9780 3666 9801
      3680 9799
TIME...MOT...LOC 1314Z 281DEG 27KT 3670 9787

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

..speg.

Special weather statement, Jun 18, 7:42 AM CST, 44 minutes before

Special Weather Statement
National Weather Service Norman OK
842 AM CDT Thu Jun 18 2026

OKZ008-013-181400-
Kay OK-Noble OK-
842 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of south central Kay
and northeastern Noble Counties through 900 AM CDT...

At 842 AM CDT, Doppler radar was tracking a strong thunderstorm near
Marland, moving east-southeast at 30 mph.

HAZARD...Wind gusts of 40 mph and penny 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...
Ponca City and Marland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3669 9693 3668 9693 3669 9699 3668 9705
      3666 9706 3660 9704 3659 9706 3658 9700
      3660 9691 3656 9689 3655 9690 3653 9699
      3651 9701 3650 9703 3655 9724 3670 9721
TIME...MOT...LOC 1342Z 280DEG 25KT 3660 9711

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

..speg.

Special weather statement, Jun 18, 7:44 AM CST, 42 minutes before

Special Weather Statement
National Weather Service Norman OK
844 AM CDT Thu Jun 18 2026

OKZ007-181415-
Grant OK-
844 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of southern Grant
County through 915 AM CDT...

At 844 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles northwest of Pond Creek, moving east-southeast at 30 mph.

HAZARD...Wind gusts of 40 mph and penny 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...
Pond Creek and Jefferson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3679 9758 3659 9763 3659 9787 3663 9801
      3680 9797
TIME...MOT...LOC 1344Z 280DEG 25KT 3671 9790

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

..speg.

The radar

The Vance AFB radar (KVNX), 51 km away, was scanning. The volume nearest the first event began at 14:24 UTC.

Open the radar archive at this moment

Event by event

6 hail, 1 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Hail, Grant

When: June 18, 8:26 AM CST
Where: Grant County, Lamont
Measured: 0.88 in hail
Reported by: Emergency Manager
Coordinates: 36.690, -97.560

The location is approximate.

Hail, Grant

When: June 18, 8:30 AM CST
Where: Grant County, 5.35 mi WNW of Salt Fork
Measured: 1.25 in hail
Reported by: Public
Coordinates: 36.656, -97.684

The report was relayed through mPING. The event time was adjusted based on radar observations.

Thunderstorm Wind, Grant

When: June 18, 9:00 AM CST
Where: Grant County, 1 mi S of Lamont
Measured: 52 kt (60 mph) estimated gust
Property damage: $2,000
Reported by: Emergency Manager
Coordinates: 36.676, -97.557

Power lines were blown down along U.S. Highway 60, south of Lamont. The location is approximate, and the event time is estimated based on radar observations.

Hail, Grant

When: June 18, 11:38 AM CST
Where: Grant County, 5.36 mi WNW of Salt Fork
Measured: 1 in hail
Reported by: Public
Coordinates: 36.656, -97.685

The report was relayed through mPING.

Hail, Grant

When: June 18, 11:44 AM CST
Where: Grant County, Lamont
Measured: 1 in hail
Reported by: Emergency Manager
Coordinates: 36.690, -97.560

The location is approximate.

Hail, Grant

When: June 18, 11:54 AM CST
Where: Grant County, Pond Creek
Measured: 1.25 in hail
Reported by: Emergency Manager
Coordinates: 36.670, -97.800

The location is approximate.

Flash Flood, Grant

When: June 18, 12:00 PM CST to 3:00 PM CST
Where: Grant County, 0.91 mi WSW of Salt Fork to 3.1 mi E of Salt Fork
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 36.637, -97.606

Significant roadway flooding occurred along the Oklahoma Highway 74 corridor south of Lamont and the Salt Fork River. Several roads in the area were closed. A video showing significant flooding along Comanche Road, west of Oklahoma Highway 74, was also shared. The event time is approximate.

Hail, Noble

When: June 18, 12:48 PM CST
Where: Noble County, 6.76 mi NE of Billings
Measured: 1 in hail
Reported by: Public
Coordinates: 36.592, -97.345

The report was relayed through mPING.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Oklahoma in 2026 Every state in 2026 This day in weather history Warnings in Oklahoma, June 2026

Sources

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: 1349288, 1349295, 1349294, 1349298, 1349300, 1349307, 1355780, 1349311.