Winds will increase out of the west-southwest on Monday as a ridge of high pressure begins to flatten ahead of an approaching low pressure system. Expect wind speeds of 10-15 mph across western Montana and central Idaho, with gusts to about 20 mph. Mountain ridgetops will see gusts of 30-40 mph, especially over the Continental Divide in Glacier Park, as well as the Mission, Cabinet, and Bitterroot ranges.
Little to no rain is expected with this system, unless you are right along the spine of the Divide. That being said, a cooldown in temperatures is likely for just about everywhere.
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