Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 091017

Area Forecast Discussion
National Weather Service Missoula MT
317 AM MST TUE FEB 9 2016

.DISCUSSION...More of the same is anticipated across the Northern
Rockies today under persistent high pressure. Patchy fog is likely
this morning in select locations, and will vary in density
depending on where it forms. Plenty of dry air will be in place
today, however clouds may linger in the typical valleys of
northwest Montana through tonight.

Weak shortwaves will pass through the ridge of high pressure over
the region during the second half of this week. Widespread cloud
cover and low chances for rain and snow will first be possible in
the northern Clearwater Mountains of Idaho and into northwest
Montana on Thursday night.

The main trough that will bring the potential for rain changing to
snow is still on track to move into the region on Saturday. Model
guidance had previously trended weaker with this trough, but are
now trending toward a wetter and stronger cold front solution.
The rapid forecast model changes continue to lend to low
confidence in the strength of this trough, so the forecast has
only had minor changes for the weekend. Forecast issues are
similar to the weekend for the rest of the extended forecast, so
near-normal conditions remain in the forecast until confidence


.AVIATION...Patchy fog is possible at all terminals this morning,
however chances won`t be great. KBTM has already had periodic
reductions from a thin layer of fog, and should continue to see
reductions through roughly 09/1500Z. In addition, a lingering
stratus deck may be more prevalent across portions of northwest
Montana, including KGPI, though aviation reductions should be
minimal. High pressure will continue to persist over the Northern
Rockies, bringing generally fair weather and chances for fog to
develop once again tonight.



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