Flash Flood Warning 41, NWS Norman, OK

Area Forecast Discussion
National Weather Service Norman OK
636 PM CDT Thu Jul 13 2023

...New AVIATION...

.SHORT TERM...
(Through tonight) Issued at 244 PM CDT Thu Jul 13 2023

Very hot temperatures and oppressive humidity is in place once again
this afternoon, especially for areas roughly along and east of
I-35, where we have seen fewer clouds and dewpoints are near or
over 80 degrees once again today. Clouds have been more extensive
out west, with even some light rain or sprinkles seen at times.

Model agreement is fairly poor regarding storm development and
evolution later today and tonight. In general expect that storms
will fire within upslope regime across the high plains this
afternoon, with steering flow then taking them east or southeastward
into this evening. Highest chances for storms will be across our
western Oklahoma counties this evening, with the greatest
uncertainty being whether we see storms organize into an MCS and
move further eastward tonight. Several CAMs also show storms
initiating in our area this evening, potentially related to a
strengthening (though still relatively weak) low-level jet and
warm- advection, but this is a lower probability scenario at this
time. Storms could pose a hail risk this evening across western
Oklahoma, with the threat then transitioning more towards damaging
winds if storms are able to grow upscale. Flooding could also be
a concern given recent heavy rainfall, especially if we see storms
train over the same areas.

Ware

&&

.LONG TERM...
(Friday through next Wednesday) Issued at 244 PM CDT Thu Jul 13
2023

The core of the heat is expected to shift a bit southward on Friday,
with the expectation of more clouds lingering into the afternoon,
especially across the northern half of the area. However, we still
expect heat index values near or over 100 degrees for much of the
area, with values over 105 for portions of central/southern Oklahoma
and western north Texas where a Heat Advisory is in effect Friday
afternoon.

A cold front will move southward Friday evening, with convection
expected to develop along it in Kansas and move southward into our
area. Damaging winds will be the main severe hazard with these
storms, but we could also see a risk for hail with any more discrete
convection. Storm chances will be highest across northern Oklahoma
and will drop off with south and southwest extent.

Storm chances continue into the weekend as high plains convection
once again tracks into our area during the evening and overnight
hours. The ridge will begin building back into the area for the
early to middle portion of next week, which will decrease our
storm chances and increase our temperatures.

Ware

&&

.AVIATION...
(00Z TAFS)
Issued at 626 PM CDT Thu Jul 13 2023

Showers and storms continue in southwestern Oklahoma and western
north Texas, with frequent lightning and erratic surface winds
near any strong thunderstorms. Additional showers and
thunderstorms will develop through the overnight hours, mainly impacting
north Oklahoma and north Texas. VFR ceilings are expected to
continue across the most of region, with MVFR ceilings expected
across north central Oklahoma early Friday morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  74  93  71  88 /  40  30  50  20
Hobart OK         73  99  71  90 /  40  20  30  20
Wichita Falls TX  79 103  77  99 /  20  10  20  10
Gage OK           68  93  67  86 /  40  30  40  20
Ponca City OK     72  90  68  88 /  60  50  60  10
Durant OK         79  96  76  96 /  20  10  30  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Heat Advisory until 9 PM CDT this evening for OKZ006>008-011>018-
     021-022.

     Excessive Heat Warning until 9 PM CDT this evening for OKZ019-
     020-023>048-050>052.

     Heat Advisory from noon to 9 PM CDT Friday for OKZ025-027>032-
     036>048-050>052.

TX...Excessive Heat Warning until 9 PM CDT this evening for
     TXZ083>090.

     Heat Advisory from noon to 9 PM CDT Friday for TXZ083>090.

&&

SHORT TERM...08
LONG TERM....08
AVIATION...50

Hazardous Weather Outlook
National Weather Service Norman OK
306 PM CDT Thu Jul 13 2023

OKZ004>048-050>052-TXZ083>090-142015-
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-
306 PM CDT Thu Jul 13 2023

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Through Tonight...

.Excessive Heat...
Dangerous hot conditions will return this afternoon across much of
our area. Central and all of southern Oklahoma and adjacent
western north Texas could see heat indices from 110-115 degrees as
an Excessive Heat Warning will be in effect starting in the
afternoon through 9 PM. Westcentral and northcentral Oklahoma
could see heat indices at 105-107 degrees, as a Heat Advisory will
be in effect there during the afternoon through mid-evening as
well.

.Thunderstorms...
Thunderstorms will be possible during the early evening hours
through early Friday morning. Severe storms will be possible with
up to golf ball size hail and 60-80 mph wind gusts as the two
severe hazards, as well as heavy rainfall under the stronger
storms.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Excessive Heat...
Dangerous hot conditions will be possible Friday afternoon and
possibly again on Saturday afternoon across central, southern
Oklahoma and western north Texas. Dangerous hot conditions may be
returning again next week.

.Thunderstorms...
Thunderstorms will be possible on Friday during the early evening
and into Saturday morning generally near and north of I-40. Some
of these storms could become severe, with large hail and damaging
wind gusts as the severe hazards. Flooding and/or flash flooding
will also be possible with these storms producing heavy rainfall.
Thunderstorms will again be possible across our area late Saturday
but restricted to northern Oklahoma on Sunday night.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

Special Weather Statement
National Weather Service Norman OK
846 PM CDT Thu Jul 13 2023

OKZ037-044-140215-
Tillman OK-Cotton OK-
846 PM CDT Thu Jul 13 2023

...A strong thunderstorm will impact portions of northwestern Cotton
and east central Tillman Counties through 915 PM CDT...

At 846 PM CDT, Doppler radar was tracking a strong thunderstorm 5
miles south of Chattanooga, moving east at 25 mph.

HAZARD...Wind gusts of 50 to 55 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...
Cookietown.

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.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3428 9874 3439 9873 3442 9846 3424 9845
TIME...MOT...LOC 0146Z 273DEG 23KT 3434 9866

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

03

Special Weather Statement
National Weather Service Norman OK
850 PM CDT Thu Jul 13 2023

OKZ037-140215-
Tillman OK-
850 PM CDT Thu Jul 13 2023

...A strong thunderstorm will impact portions of central Tillman
County through 915 PM CDT...

At 849 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles northwest of Hollister, 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...
Frederick, Hollister, and Loveland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3432 9900 3445 9900 3448 9875 3430 9874
TIME...MOT...LOC 0149Z 271DEG 12KT 3439 9891

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

03

Special Weather Statement
National Weather Service Norman OK
851 PM CDT Thu Jul 13 2023

OKZ023-024-140215-
Canadian OK-Caddo OK-
851 PM CDT Thu Jul 13 2023

...A strong thunderstorm will impact portions of northern Caddo and
southwestern Canadian Counties through 915 PM CDT...

At 851 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lookeba, moving southeast 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...
Hinton, Binger, and Lookeba.

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 3539 9853 3550 9842 3539 9812 3522 9827
TIME...MOT...LOC 0151Z 302DEG 20KT 3538 9836

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

03

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