Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 262042

Area Forecast Discussion
National Weather Service Missoula MT
242 PM MDT Tue Sep 26 2017

.DISCUSSION...Northerly flow tonight into Wednesday morning should
help maintain some cloud cover over the region, and even a few
light showers, primarily over the higher terrain. With the low
levels of the atmosphere remaining saturated, fog may become a bit
more widespread for Wednesday morning. Remaining cloud cover
should limit it from becoming dense over large areas.

High pressure begins to fold over on western Montana and central
Idaho Wednesday into Friday. This will begin to dry things out and
bring some periods of sun across the region. Temperatures will
warm to near seasonal normals, with Thursday and Friday being the
warmest days this week.

A fall weather system will approach the region Friday night and
linger into Sunday. This will bring a transition to cooler, wet
and breezy conditions. The coldest air is expected to arrive
Saturday night into Sunday, and with precipitation still
lingering, mountain and mountain pass level snow will be a

The details become a bit more uncertain past Sunday, but the
overall consensus appears to favor continued cool and unsettled


.AVIATION...Northerly flow aloft over western Montana and central
Idaho will continue to favor a mid level cloud deck, causing
terrain to be obscured at times. With the low levels of the
atmosphere remaining fairly moist, fog and low stratus will be a
real possibility for all airfields by Wednesday morning. However,
lingering higher level cloud cover is expected to keep widespread
dense fog from developing. More sunshine with is expected
Wednesday afternoon into Thursday as high pressure strengthens
over the area.



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