678
ACUS01 KWNS 280110
SWODY1
SPC AC 280109

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0809 PM CDT Thu Aug 27 2026

Valid 280100Z - 281200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF
WEST-CENTRAL NE INTO NORTHWEST KS...NORTHERN MID-ATLANTIC...AND
WEST-CENTRAL MT...

...SUMMARY...
Storms capable of producing severe hail and wind remain possible
this evening across west-central Nebraska into northwest Kansas.
Localized wind damage also remains possible over parts of the
Mid-Atlantic and Northeast. Storms with localized severe gusts will
continue through the evening across west-central Montana.

...Central Plains...
Earlier supercells have congealed into a small southward-moving
cluster across northwest NE. Steep lapse rates, strong buoyancy
(MLCAPE of 2000-3000 J/kg) and effective shear of 40-50 kt (as
observed on the 00Z LBF sounding) within a northwesterly flow regime
will continue to support organized storms through the evening. The
severe-wind (potentially exceeding 75 mph) threat associated with
this small MCS is expected to spread towards parts of southwest NE
and northwest KS. Any embedded supercells or discrete cells along
the periphery of the cluster will also remain capable of producing
large hail, given the favorable thermodynamic environment and
relatively elongated hodographs. Longevity of this cluster into late
tonight is uncertain, due to increasing MLCINH and generally modest
large-scale ascent. Some severe potential could spread as far as
west-central/southwest KS before diminishing.

...Parts of the Mid-Atlantic/Northeast...
Scattered strong to locally severe storms are ongoing this evening
from the northern Mid-Atlantic into parts of the Northeast. While
substantial convective overturning has occurred, a corridor of
moderate MLCAPE remains in place from northern VA into eastern PA
and southeast NE. A short-term threat for locally damaging wind and
perhaps marginal hail may continue before storms generally weaken by
late evening. See MCD 2157 for more information.

...West-central MT...
High-based convection is ongoing early this evening across parts of
west-central MT. Weak buoyancy will continue to hamper storm
intensity, but the favorable lapse rate environment will continue to
support potential for strong to severe gusts. See MCD 2158 for more
information.

...Parts of south-central TX...
Scattered storms across south-central TX are ongoing near a
southward-moving composite outflow. These storms may be capable of
producing localized damaging gusts through dusk, before weakening
with the onset of nocturnal cooling/stabilization.

..Dean.. 08/28/2026

$$