The Missoulian website just reported that “the westbound lanes of Interstate 90 are closed from St. Regis to Lookout Pass because of an avalanche”, and there is currently no set time that the road will reopen. From St. Regis to Lookout Pass is approximately 33 miles.
Please be cautious while driving anywhere in Montana, and report any incidents to the authorities.
(Information via the missoulian.com)