Area Forecast Discussion
Issued by NWS Missoula, MT
FXUS65 KMSO 072050
Area Forecast Discussion
National Weather Service Missoula MT
250 PM MDT WED OCT 7 2015
.DISCUSSION...Rain showers will continue to increase in coverage
today across the northern Rockies as moisture streams in from the
west. Temperatures may warm a few more degrees, but most places
are already near their high temperature for the day. Precipitation
will be most widespread this evening and overnight. Lemhi County,
Idaho and areas farther south should miss out on shower activity
as the best moisture feed stay farther north. The Bitterroots and
Mission ranges are expected to see over a quarter inch of rain
total over the next 24 hours, but valleys such as the Bitterroot,
Missoula, and Flathead will be somewhat shadowed and may see
closer to tenth or two.
On Thursday, showers will taper off during the morning, and a
ridge of high pressure begins to build back into the area.
Temperatures will be about 5 degrees warmer than Wednesday. By
Friday, clearing skies will allow temperatures to warm further
into the 70s for many valleys, which would be approaching record
values for this time of year.
The next weather system will approach Saturday which will result
in windy conditions, especially for mountain ridges, and allow
cloud cover to start spreading from northwest to southeast. The
wind and sunnier skies generally south of I-90 on Saturday will
allow for warmer temperatures to be felt during the day.
Precipitation will begin for northwest Montana mid-day Saturday
and spread southward for much of western Montana and portions of
north-central Idaho by late Saturday night/Sunday morning. As the
system passes, cooler air with cloudy conditions will keep Sunday
at more seasonable temperatures. The breezy to windy conditions
will continue into Sunday morning and through Sunday evening
before decreasing Sunday night.
High pressure will quickly rebuild Sunday night/Monday, though
some showers may continue to track across northwest Montana Monday
and Tuesday. Elsewhere, expect a warming and drying trend for next
.AVIATION...Showers and mid-level cloud decks will continue to affect
terminals today and tonight. Shower coverage will generally
increase overnight, with KGPI, KMSO, and KBTM all having chances
for rain. Other than some afternoon breezes, winds will be light.
Smoke from fires may cause locally hazy skies and slight
reductions in visibility, especially for KGPI and KMSO.