Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 282136

Area Forecast Discussion
National Weather Service Missoula MT
236 PM MST SAT NOV 28 2015

.DISCUSSION...Surface high pressure will continue to be the
dominant feature over the Northern Rockies through at least mid
next week. Valley inversions continue to strengthen each day which
will keep pollutants trapped creating hazy conditions in all
valleys. While low stratus/fog will persist over much of
northwest Montana and portions of north central Idaho. The stratus
deck is anticipated to expand tonight, especially into the
Missoula and Seeley Lake valleys. Areas under the stratus clouds
will experience small diurnal temperatures changes with the
the occasional flurry. While areas that are clear should still
experience very cold nights with high valley locations dropping
below zero each night.

Valley inversions are likely to continue through most of next
week. A weak disturbance will approach on Wednesday, which may
bring light precipitation to northwest Montana and central Idaho.
A stronger disturbance is expected late Thursday into Friday. This
disturbance should help erode the valley inversions allowing
temperatures to warm up into the upper 30s to low 40s for many
valleys by Friday. Precipitation with this system looks to be a
mixture of rain and snow. More details to follow.


.AVIATION...A persistent low stratus deck will remain fixed in
place at KGPI into the foreseeable future. At KMSO, the stratus
deck and patchy fog is expected to develop by Sunday morning and
linger throughout much of the day.  KBTM will continue to battle
drifting fog and stratus during the morning hours with conditions
improving by the afternoon. And at KSMN some fog is expected to
develop by the morning, but dissipate by late morning/early



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