Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 282006

Area Forecast Discussion
National Weather Service Missoula MT
206 PM MDT Thu May 28 2020

.DISCUSSION...Today and each subsequent day through Saturday will
be warmer than the previous. By Saturday we are expecting
temperatures to be 15 to 20 degrees warmer than normal. For
western Montana, that means temperatures from the upper 80s to
lower 90s, and central Idaho the lowest valleys will be near

Early Friday an area of showers is expected through central Idaho
to southwest Montana. Other than a couple showers or cracks of
thunder, no impacts are expected.

Friday afternoon, the atmosphere will become more destabilized and
central Idaho through southwest Montana will have the chance for
showers and thunderstorms. With dew point depressions near 30 to
40 degrees, strong winds are possible from these showers.

Saturday will not only be the warmest day but abnormally moist air
will move into the Northern Rockies, making the day unstable and
humid. All but parts of central Idaho and northwest Montana will
be mostly cloudy in the afternoon. This may decrease the
probability of stronger thunderstorms without the mechanical
lifting of a weather system. The current track of a low pressure
trough on Saturday will bring it through north Clearwater County
Saturday evening and northwest Montana overnight into Sunday
morning. These two locations are the most likely areas for
stronger storms, these storms if they develop will be capable of
heavy rain, strong winds, and small hail.

At least through the middle of next week, expect to stay in
southwest flow. What does that mean? Temperatures slightly above
normal and afternoon showers with the possibility of a
thunderstorm or two.


.AVIATION...High pressure will continue for the Northern Rockies
at least through Saturday. Early morning Friday, the possibility
of showers from central Idaho to southwest Montana is possible but
at this time no terminals should be affected.



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