Area Forecast Discussion
Issued by NWS Missoula, MT
FXUS65 KMSO 092045
Area Forecast Discussion
National Weather Service Missoula MT
245 PM MDT FRI OCT 9 2015
...STRONG WINDS WITH COLD FRONT LATE SATURDAY THROUGH SUNDAY...
.DISCUSSION...Above-average temperatures will continue today and
Saturday ahead of a strong cold front set to impact the Northern
Rockies Saturday through Sunday. Saturday morning will start off
as a pleasant autumn day, with mild conditions lasting into the
early afternoon. Highs may even approach records. Winds will
begin to pick up ahead of the front in north central Idaho and
northwest Montana. Winds will strengthen with time and increase in
coverage, spreading across the remainder of central Idaho and
western Montana into the night.
The strongest winds will occur late Saturday evening and continue
through Sunday, especially over the higher terrain. A Wind
Advisory has been issued for northwest Montana where winds will be
strongest, however most locations across the region will see a
period of gusty winds Saturday evening through Sunday. Impacts
will be greatest to those traveling in high terrain for hunting or
recreation purposes, as well as those boating on area lakes.
Flathead Lake will be most susceptible, where up to 3 foot waves
could occur by Sunday. Those who plan to be on Flathead Lake
Saturday morning should still prepare for increased chop leading
up to Saturday evening when the strongest winds will occur.
Precipitation will develop as the cold front passes, with the
greatest amounts occurring in the terrain along the Continental
Divide and along the Montana/Idaho border. Valleys will be mostly
downsloped due to the strong winds, but periodic light showers
will still be possible through Sunday. Highs will be around 20
degrees colder vs Saturday. Areas above 7,000 feet may even see a
dusting of snow in the morning.
Much warmer weather is in store for the area next week, with dry
conditions for most locations. In fact, a strengthening ridge
by the latter half of the week could bring near-record
temperatures. While the afternoons will not feel very fall-like,
mornings will still be chilly in the valleys.
.AVIATION...Benign flying conditions will occur the rest of today
through the early half of Saturday (before the cold frontal
passage expected later on Saturday). Winds will increase
dramatically as a cold front crosses the region Saturday night
through Sunday evening, roughly about 12/0300Z. Upper level winds
will be very strong, with surface winds in excess of 20 kts with
gusts to 40 kts possible. Winds of this magnitude are possible at
all terminals, particularly KGPI.
MT...Wind Advisory from 6 PM Saturday to 9 PM MDT Sunday
Kootenai/Cabinet Region...Lower Clark Fork Region.
Wind Advisory from 6 PM Saturday to 9 PM MDT Sunday
Flathead/Mission Valleys...West Glacier Region.