Severe Thunderstorm Warning 433, NWS Norman, OK

Area Forecast Discussion
National Weather Service Norman OK
606 PM CDT Thu May 22 2025

...New AVIATION...

.KEY MESSAGES...
Updated at 601 PM CDT Thu May 22 2025

 - Thunderstorm chances continue into the holiday weekend with a
   chance of severe storms each day

 - Heavy rainfall and flooding may occur especially with a cold
   front Saturday night into Sunday

 - Cooler temperatures are possible behind a front early next
   week.

&&

.NEAR TERM...
(Rest of today and tonight)
Issued at 155 PM CDT Thu May 22 2025

The strongest part of our early morning convection continues to
move slowly southward into northern Texas/far southern Oklahoma.
An associated outflow boundary extends from near Binger southward
to Lawton and then southeastward into northern Texas. Ahead of the
outflow, better moisture return is occurring into the DFW area
where upper 60 to lower 70 dewpoint temperatures reside. Farther
west, surface temperatures are warmer with slightly lower dewpoint
air. As strong heating continues, it is likely that additional
severe storms will form across parts of southwest Oklahoma and
western north Texas. With the ongoing convection in southern
Oklahoma and cloud cover, additional severe convection this
afternoon should stay south of the Red River in Texas (eastern
part of the outflow boundary).

Despite some weakness in the mid level flow, good direction turning
and high instability will support the risk of very large hail and
damaging wind gusts. Any storm that can become establish and move
along the outflow boundary will have the potential to produce a
tornado or two.

Most of the convection this afternoon and early evening should be
south of our area by mid evening.  Most areas will remain dry
from the mid evening into the overnight hours, with increasing
chances of elevated storms around sunrise Friday.

&&

.SHORT TERM...
(Friday through Saturday night)
Issued at 155 PM CDT Thu May 22 2025

A much stronger low-level jet is expected to focus elevated
thunderstorms by early Friday morning (6-8 am).  Currently, it
appears north central and central Oklahoma will be the favored areas
of seeing this development.  Elevated instability is progged to be
around 1500+ J/kg, so strong to severe thunderstorms appear likely.
The mid and upper level flow will generally move storms to the east
and southeast around 30-35 mph.  It's certainly possible the
majority of the storms will move east of the area by early afternoon
with a lull in rain and storm chances through the late
afternoon/early evening.  A surface low is expected to deepen during
the day across southeast Oklahoma.  With a 10 mb gradient across the
main body of Oklahoma and mixing, breezy southerly winds can be
anticipated.

A few storms may develop across a dryline in the central/eastern
Texas Panhandle which may drift into far western Oklahoma/western
north Texas by early/mid evening.  Modest height rises are expected
across the southern/central Plains Friday night/Saturday morning
with very warm mid-level temperatures (13-15 C) overspreading the
western third of Oklahoma. Several models indicate a complex or
two of storms will develop mainly north of Oklahoma in Kansas near
the nose of a rather strong low level jet. This activity is
expected to move east and southeast during the overnight, with
some storms entering central and eastern parts of the area.

Convective trends Saturday afternoon and night will likely depend
on a possible outflow boundary from morning convection, and a cold
front located across northern and western parts of Oklahoma. A
capping inversion may limit convection and or storm coverage
across parts of western Oklahoma/western north Texas.

&&

.LONG TERM...
(Sunday through Wednesday)
Issued at 310 AM CDT Thu May 22 2025

The stormy pattern will roll on into Sunday, focused once again near
a frontal boundary as a weak upper wave begins to translate
eastward. With continued strong instability and sufficient wind
profiles, some severe weather risk is likely to remain, though
details on coverage/areas/severity are murky and will likely be
highly dependent on evolution of previous day(s) thunderstorms and
the aforementioned front.

The surface front looks likely to accelerate east of the forecast
area by early Monday, with very pleasant/unseasonably cool
high temperatures (low to mid-70s) possible on Monday and
Tuesday. A low (20-30%) chance for precipitation exists on Monday
afternoon across the southern tier of the area, though this
concern will be highly dependent on how fast the front moves/clear
during the day.

Ungar

&&

.AVIATION...
(00Z TAFS)
Issued at 601 PM CDT Thu May 22 2025

Area of storms across southern Oklahoma and north Texas will
continue to impact SPS/DUA for a few hours this evening. The
remainder of the night should be dry with increase in lower end
VFR and some MVFR ceilings. WAA will increase Friday morning and
will result in increase in shower/storm activity from mid morning
into the afternoon, which may linger at PNC/SWO through end of the
forecast period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  61  83  67  89 /  20  40  40  20
Hobart OK         60  86  67  95 /  20  20  20  10
Wichita Falls TX  62  89  71  95 /  40  20  20  10
Gage OK           57  86  62  88 /  20  20  20  10
Ponca City OK     57  76  61  77 /  20  50  70  40
Durant OK         65  86  71  91 /  20  10  20  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

NEAR TERM...06
SHORT TERM...06
LONG TERM....09
AVIATION...30

Preliminary Local Storm Report
National Weather Service Norman OK
531 PM CDT Thu May 22 2025

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

0528 PM     Hail             3 SE Velma              34.42N 97.62W
05/22/2025  E1.25 Inch       Stephens           OK   Public

&&

Bunker

Preliminary Local Storm Report
National Weather Service Norman OK
537 PM CDT Thu May 22 2025

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

0504 PM     Hail             Walters                 34.36N 98.31W
05/22/2025  E1.25 Inch       Cotton             OK   Trained Spotter

            Time estimated from radar. Report from X.

&&

Bunker

Preliminary Local Storm Report
National Weather Service Norman OK
541 PM CDT Thu May 22 2025

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

0513 PM     Hail             5 E Walters             34.35N 98.23W
05/22/2025  E1.00 Inch       Cotton             OK   Public

&&

Bunker

Preliminary Local Storm Report
National Weather Service Norman OK
543 PM CDT Thu May 22 2025

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

0420 PM     Hail             Devol                   34.19N 98.59W
05/22/2025  M2.50 Inch       Cotton             OK   Emergency Mngr

            Time estimated from radar. Report in
            NWSchat.

&&

Bunker

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