Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 131533

Area Forecast Discussion
National Weather Service Missoula MT
833 AM MST Wed Dec 13 2017

.UPDATE...Update for winter weather advisory for
Missoula/Bitterroot valleys, Drummond, Deerlodge, Georgetown
Lake, Philipsburg, Anaconda to Butte for today.


.DISCUSSION...An area of light snow will move across west central
and southwest Montana through mid morning into afternoon. The
road surfaces are cold and will hold snow many areas. In addition,
the character of the snow is expected to be more granular in
nature at times and also hold to many road surfaces with
relatively low accumulations. The snow will end in the Missoula
and Bitterroot valleys by early afternoon. Further in southwest
Montana, the snow will end by late afternoon, but many roads will
remain slick well into the evening. Over northwest Montana, areas
of light snow (lighter than what is expected in southwest Montana)
are occurring this morning with local slick roads.


.AVIATION...Fairly widespread light snow will impact west-central
Montana and north-central Idaho mid-morning through mid-afternoon
leading to a period of reduced visibility and lower ceilings,
impacting KMSO, KBTM, and KSMN. Abundant stratus is present across
Northwest Montana and is expected to remain an issue throughout
much of today with an occasional light snow flurry. Precipitation
will quickly end late this afternoon with the potential for low
stratus and areas of freezing fog to return again tonight into
Friday morning for most valleys.


MT...Winter Weather Advisory until 1 PM MST this afternoon
     Missoula/Bitterroot Valleys.

     Winter Weather Advisory until 8 PM MST this evening
     Butte/Blackfoot Region.

ID...Winter Weather Advisory until 8 AM PST this morning Lower Hells
     Canyon/Salmon River Region...Orofino/Grangeville Region.


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