264 
ACUS03 KWNS 160719
SWODY3
SPC AC 160719

Day 3 Convective Outlook CORR 1
NWS Storm Prediction Center Norman OK
0219 AM CDT Sun Aug 16 2026

Valid 181200Z - 191200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL PLAINS TO THE MID-MISSISSIPPI VALLEY...

CORRECTED FOR MISSPELLING

...SUMMARY...
Severe thunderstorms capable of large hail and damaging wind gusts
are expected on Tuesday afternoon/evening across parts of the
central Plains to the Mid-Mississippi Valley.

...Central Plains to Mid-MS Valley vicinity...

Height falls are expected across the region during the afternoon
into Tuesday night as an upper trough continues to dig across the
Great Lakes. This will result in increasing northwesterly flow
aloft, and a deepening surface low over KS. Rich boundary layer
moisture will be in place ahead of a south/southeast-advancing cold
front. Moderate to strong instability is expected to develop by
afternoon. Forecast soundings show steep midlevel lapse rates, with
vertically veering wind profiles supporting 40+ kt effective shear.
Elongated/straight hodographs are also present in forecast
soundings. Initial supercells could pose a risk for large hail and
severe gusts. With time, sufficient clustering could occur ahead of
the front as a low-level jet increases during the evening, and MCS
development may occur.

..Leitman.. 08/16/2026

$$


File: /home/ldm/var/data/BY_SOURCE/KWNS/ACUS03/20260816T0719.txt



248 
ACUS03 KWNS 160644
SWODY3
SPC AC 160643

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0143 AM CDT Sun Aug 16 2026

Valid 181200Z - 191200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL PLAINS TO THE MID-MISSISSIPPI VALLEY...

...SUMMARY...
Severe thunderstorms capable of large hail and damaging wind gusts
are expected on Tuesday afternoon/evening across parts of the
central Plains to the Mid-Mississippi Valley.

...Central Plains to Mid-MS Valley vicinity...

Height falls are expected across the region during the afternoon
into Tuesday night as an upper trough continues to dig across the
Great Lakes. This will result in increasing northwesterly flow
aloft, and a deepening surface low over KS. Rich boundary layer
moisture will be in place ahead of a south/southeast-advancing cold
front. Moderate to strong instability is expected to develop by
afternoon. Forecast soundings show steep midlevel lapse rates, with
vertically veering wind profiles supporting 40+ kt effective shear.
Elongated/straight hodographs are also present in forecast
soundings. Initial supercells could pose a risk for large hail and
severe gusts. With time, sufficient clustering could occur ahead of
the front as a low-level just increases during the evening, and MCS
development may occur.

..Leitman.. 08/16/2026

$$


File: /home/ldm/var/data/BY_SOURCE/KWNS/ACUS03/20260816T0644.txt



663 
ACUS03 KWNS 151931
SWODY3
SPC AC 151930

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0230 PM CDT Sat Aug 15 2026

Valid 171200Z - 181200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF THE
NORTHERN PLAINS...

...SUMMARY...
Strong to severe thunderstorms are possible Monday afternoon and
evening across portions of the northern and central Plains, and
parts of the southern Appalachians/Carolinas.

...Central to Northern Plains...
As an upper low moves into northern Ontario, gradual height falls
will occur into the northern Plains on Monday. Midlevel
northwesterlies of 40-50 kt will be common over the Dakotas and MN,
with 30 kt flow southward toward I-80. A cold front will move across
the Dakotas and into MN, with the front stalling over NE. Dewpoints
in the 60s, strong heating and steep lapse rates will favor areas of
moderate instability ahead of the front, with storms developing late
afternoon. Scattered cells may produce large hail along this
boundary, with an additional threat of damaging winds and possibly
evening MCS over NE.

...Southern Appalachians into the Carolinas...
Mid to high level winds of 20-30 kt will remain over the region on
Monday, with relatively warm temperatures aloft. Still, substantial
moisture will remain in place, with areas of moderate instability
developing as the surface trough deepens. An uncapped air mass and
convergence along the wind shift will support scattered afternoon
storms, and some may produce locally damaging gusts as they travel
southeastward through the evening.

..Jewell.. 08/15/2026

$$


File: /home/ldm/var/data/BY_SOURCE/KWNS/ACUS03/20260815T1931.txt