Flash Flood Warning 49, NWS Norman, OK

293 
WGUS74 KOUN 181751
FFSOUN

Flash Flood Statement
National Weather Service Norman OK
1251 PM CDT Thu Jun 18 2026

OKC053-182015-
/O.CON.KOUN.FF.W.0049.000000T0000Z-260618T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grant OK-
1251 PM CDT Thu Jun 18 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 PM CDT THIS 
AFTERNOON FOR SOUTHEASTERN GRANT COUNTY...

At 1251 PM CDT, emergency management reported earlier flooding over 
roads south of Lamont. Thunderstorms producing heavy rain are moving 
south over the warned area...and rainfall rates will decrease in the 
next hour. Between 2 and 4 inches of rain have fallen. Additional 
rainfall amounts up to 1 inch are possible in the warned area. Flash 
flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Medford, Pond Creek, Lamont, Deer Creek and Jefferson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3662 9747 3662 9775 3672 9795 3685 9788
      3694 9746

FLASH FLOOD...OBSERVED

$$

TL

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

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.

Preliminary Local Storm Report
National Weather Service Norman OK
930 AM CDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0926 AM     Hail             Lamont                  36.69N 97.56W
06/18/2026  M0.88 Inch       Grant              OK   Emergency Mngr

            Nickel sized hail reported by the Emergency
            Manager in Lamont.

&&

21

Preliminary Local Storm Report
National Weather Service Norman OK
1008 AM CDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0947 AM     Hail             6 N Hunter              36.66N 97.68W
06/18/2026  E1.25 Inch       Grant              OK   Public

            Report from mPING: Half Dollar (1.25 in.).

&&

Preliminary Local Storm Report
National Weather Service Norman OK
1027 AM CDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 AM     Tstm Wnd Dmg     1 SSW Lamont            36.68N 97.56W
06/18/2026                   Grant              OK   Emergency Mngr

            powerlines down south of Lamont on US 60.

&&

21

Special Weather Statement
National Weather Service Norman OK
1101 AM CDT Thu Jun 18 2026

OKZ007-181630-
Grant OK-
1101 AM CDT Thu Jun 18 2026

...A strong thunderstorm will impact portions of northeastern Grant
County through 1130 AM CDT...

At 1101 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles northeast of Medford, moving east at 30 mph.

HAZARD...Wind gusts up to 50 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...
Medford, Deer Creek, and Renfrow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3676 9747 3678 9778 3700 9782 3700 9746
TIME...MOT...LOC 1601Z 273DEG 26KT 3685 9769

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

..speg.

Special Weather Statement
National Weather Service Norman OK
1134 AM CDT Thu Jun 18 2026

OKZ007-008-181700-
Kay OK-Grant OK-
1134 AM CDT Thu Jun 18 2026

...Strong thunderstorms will impact portions of western Kay and
eastern Grant Counties through NOON CDT...

At 1134 AM CDT, Doppler radar was tracking strong thunderstorms 5
miles north of Nardin and 5 miles northwest of Lamont. Movement was
east at 40 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...
Blackwell, Tonkawa, Medford, Newkirk, Lamont, Braman, Deer Creek,
Renfrow, Chilocco, Nardin, Blackwell Lake, and Peckham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3664 9729 3668 9766 3683 9779 3700 9757
      3700 9690
TIME...MOT...LOC 1634Z 269DEG 33KT 3689 9746 3674 9764

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

..speg.