Day 2 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0247 PM CDT Fri Jun 27 2025

Valid 281200Z - 291200Z

...Southwest Wyoming...
A surface low in South Dakota, elevated mid-level flow and a
well-mixed boundary layer will promote sustained west winds of
around 15 mph across southwest Wyoming Saturday. These winds
combined with relative humidity of 15-20 percent amid dry fuels will
bring an elevated fire weather threat to much of the Wyoming Basin.

...Snake River Plain...
A passing mid-level trough and attendant wind maxima atop a dry and
well-mixed boundary layer will support elevated surface winds across
the central/eastern portions of the Snake River Plain. Westerly
winds of 15-20 mph and relative humidity in the 15-20 percent range
will support elevated fire weather conditions Saturday afternoon
where dry fuels exist.

..Williams.. 06/27/2025

.PREV DISCUSSION... /ISSUED 0136 AM CDT Fri Jun 27 2025/

...Synopsis...
Low-amplitude mid-level troughing over the Northern Rockies will
begin to shift eastward Saturday as high pressure over the southern
US continues to build. A belt of stronger mid-level flow will remain
in place over parts of the Intermountain West, supporting dry
downslope flow ahead of a weak cold front over the Northwest.

...ID into southwest WY...
Gusty surface winds through central ID and southwest WY could
support a few hours of elevated fire-weather potential Saturday. In
the wake of the departing upper trough, continued mid-level zonal
flow will linger over central ID. Confidence is highest that 15-20
mph surface winds will occur across portions of the central and
eastern Snake River Plain Saturday afternoon. Coincident with RH
below 20%, elevated fire-weather conditions are probable amid fuels
that continue to dry.

Farther east into WY, less confidence exists in sustained surface
winds greater than 15 mph occurring on a widespread basis through
the day. However, a very warm and dry air mass will remain in place.
This could support some localized fire-weather concerns, especially
where terrain-augmented winds may occasionally gust to 15-20 mph.

...Please see www.spc.noaa.gov/fire for graphic product...