Weather Service Report

FXUS65 KMSO 271029

Area Forecast Discussion
National Weather Service Missoula MT
429 AM MDT Tue Sep 27 2016


Following patchy valley fog across the Northern Rockies this
morning, anticipate another very warm late September afternoon.
Skies today will be mostly clear and winds light.

Today's conditions will be mostly repeated on Wednesday; however,
cool air will push west over the Continental Divide and increase
east and northeast winds across northwest Montana. The influx of
cool air will moderate temperatures only by a handful of degrees.

Southwesterly flow over the Northern Rockies on Thursday will
bring shower and thunderstorm activity to region. Heavy valley rain
should be minimal, and much of the activity will be concentrated
over the high terrain. Afternoon temperatures will remain quite
warm during this time.

Friday will bring another chance for afternoon thunderstorms in
unstable southwesterly flow, and this will be the last day in the
near future to feature above average temperatures. In fact, the
temperature drop from Friday to Saturday highs will be notable, 10
to 15 degrees for most locations.

Many places will see showers over the weekend as a trough of low
pressure pushes in. Currently, the heaviest rain looks to be
concentrated over the Continental Divide Saturday, but there is
considerable model uncertainty, leading to low confidence in
forecast details. A reinforcing shot of cool, moist air early next
week could bring even better chances for rain, with chilly high
temperatures in the 50s for most valleys.



Following patches of valley fog this morning across the Northern
Rockies, light winds and clear skies will be present during the
next 24 hours. KGPI will be the only airfield affected by
occasional fog, restricting visibility at times through 27/1400Z.




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