SPC Aug 19, 2026 0730 UTC Day 3 Severe Thunderstorm Outlook
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Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0237 AM CDT Wed Aug 19 2026
Valid 211200Z - 221200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER NEBRASKA...
...SUMMARY...
Scattered storms, some with severe wind gusts, are possible Friday
afternoon over parts of the Carolinas. Isolated to scattered
damaging hail and wind may occur over parts of the central Plains.
...Central Plains...
Northwest winds aloft will increase across the central and northern
Plains on Friday as a shortwave trough glances the area, and an
upper ridge builds to the west. Temperatures aloft will also cool
across this region, with -10 C at 500 mb pushing south to I-70 by
Saturday morning.
Strong and heating and a surface trough will develop during the
afternoon across the northern to central High Plains, with southeast
surface winds across the Plains. Sufficient moisture should remain
in place for moderate instability to develop across much of NE and
surrounding areas.
While storm coverage is a bit uncertain, the conditional threat of
large hail is high with elongated hodographs and deep-layer shear
over 50 kt. Storms should form near the surface trough over
southwest SD into northwest NE, and proceed southeastward. Swaths of
damaging hail and wind are forecast.
...Carolinas...
A weak upper trough will affect the northeastern quarter of the
CONUS, with 20 kt midlevel winds extending south into the Carolinas.
A front is forecast to move south across NC, with low pressure into
SC an GA. A very moist air mass will remain ahead of this front,
with mid 70s F dewpoints. Daytime heating will yield strong
instability, with a strong signal for convection along this
boundary. Numerous storms may occur, with strong to severe outflow
winds.
..Jewell.. 08/19/2026