Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 022108

Area Forecast Discussion
National Weather Service Missoula MT
308 PM MDT THU JUL 2 2015

.DISCUSSION...Thursday will be another warm, sunny day with
temperatures 10 to 15 degrees above normal. Precipitation is not
expected for our region, but a few cumulus can be expected in the
mountains. The Camas Prairie and deep canyons of north central
Idaho will be the hottest place in our forecast area today, and
heat advisories are currently in place for both today and

Friday will be a few degrees warmer than today, with continued dry
conditions. Winds will be breezy from the west for western
Montana, with gusts of 20 mph during the afternoon. Winds will be
even stronger on Independence Day, gusting in the 30 mph range,
and dry conditions will continue through Saturday evening.

Overnight Saturday into Sunday, a back door cold front will push
west over the Continental Divide causing a wind shift and windy
conditions for wind prone canyons and valleys, including
Clearwater Junction, Hellgate Canyon, and Bad Rock Canyon. Despite
the air being cooler, temperatures will only fall to near average
values, since we have been well above normal prior to the front`s
arrival. Up to a quarter inch of rain will be possible over
Glacier National Park, and along northern portions of the
Continental Divide. Idaho will be spared from most of these
impacts as the front will weaken before pushing into the
Clearwater Mountains.

Early next week, the ridge begins to build back and temperatures
slowly rise, but by mid-week another back door cold front looks
possible, bringing similar conditions to Sunday.


.AVIATION...Mostly clear skies and light winds will prevail today.
Precipitation is not expected, with only a few cumulus expected over
terrain. KBTM could again see somewhat reduced visibilities due to
smoke from Canadian fires. Density altitudes will be high today
and Friday afternoon as temperatures rise a few degrees.


ID...HEAT ADVISORY until 8 PM PDT Friday Lower Hells Canyon/Salmon
     River Region...Orofino/Grangeville Region.


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