Area Forecast Discussion
Issued by NWS Missoula, MT
FXUS65 KMSO 021018
Area Forecast Discussion
National Weather Service Missoula MT
418 AM MDT THU JUL 2 2015
...Hot Today and Friday...
...Gusty winds Saturday...
.DISCUSSION...Easterly winds in western Montana have kept
temperatures quite warm in many locations. This winds will
decrease through the morning and afternoon highs are again going
to be very warm. Western portions of north central Idaho,
including Orofino, Slate Creek, and Riggins will see triple digit
temperatures both Thursday and Friday, and a heat advisory is in
effect this afternoon through Friday. A weak shortwave will pass
through the region today with a few showers possible along the
High temperatures on Friday will again approach record values with
afternoon breezes likely.
The next weather system is on track to move into the region on
Saturday. Ahead of the weather system, increased westerly winds
are expected, particularly in western Montana. Confidence is
increasing for showers and thunderstorms to move through Glacier
National Park late in the day as the shortwave passes. Easterly
winds will develop overnight Saturday night as surface high
pressure develops on the east side of the divide. These winds
could be gusty Saturday night through Sunday morning in favored
locations including, Columbia Falls, Kalispell Airport,
Helmville, Hellgate Canyon, and the east side of Flathead Lake.
Sunday will have cooler temperatures and chances for showers as
the shortwave continues through Idaho and western Montana. Though
high temperatures are going to be cooler, they will still be
slightly above average in most places.
High pressure will return for Monday, but it now looks like a more
active weather pattern will develop by the middle of next week.
This more active weather pattern will keep temperatures a little
cooler than what we have been seeing lately (low to mid 80s) and
bring increased chances for showers and thunderstorms.
.AVIATION...An easterly pressure gradient has developed over
western Montana and is causing a slight increase in winds
particularly at KGPI and KMSO. The gradient is forecast to
decrease through the morning and high temperatures will again be
quite warm this afternoon. A weak shortwave will pass through
western Montana this afternoon so showers and thunderstorms are
possible along the divide through sunset.
ID...HEAT ADVISORY from 2 PM this afternoon to 8 PM PDT Friday Lower
Hells Canyon/Salmon River Region...Orofino/Grangeville