828
ACUS01 KWNS 110102
SWODY1
SPC AC 110100

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0800 PM CDT Wed Sep 10 2025

Valid 110100Z - 111200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER FAR WESTERN
NEBRASKA INTO A SMALL PART OF NORTHEAST COLORADO...

...SUMMARY...
Isolated severe storms remain possible over far western Nebraska and
perhaps extreme northeastern Colorado early this evening. A few
storms storms will also affect parts of western Idaho into eastern
Oregon during the early evening.

...Discussion...
A small cluster of severe storms likely producing hail is currently
affecting far western NE. These storms are within a small area of
uncapped air mass, and will likely remain tied to the immediate area
and perhaps affect a small portion of northeast CO before
diminishing. Strong southeast surface winds/inflow will likely
support the ongoing cluster for a couple hours before CIN becomes
too large. For more information, see mesoscale discussion 2059.

Elsewhere, a band of thunderstorms continues to move northward
across southwest ID and southeast OR ahead of the upper vorticity
max. The 00Z BOI sounding shows steep midlevel lapse rates and
marginal overall shear, and this may support gusty winds or small
hail. However, the overall risk for severe storms appears low after
sunset with limited instability.

..Jewell.. 09/11/2025

$$