DAN , Iwas born and raised just north of GLACIER NATONAL PIECE PARK,And know all to well what the wind can do.Blowing semi's off the road
is just a breeze.If you don't have to stand at a 45 degree angle into the wind your good to gooo.WALT
The Montana DOT has a weather station on a little tower on I90, near the top of the first hill west of the Yellowstone Bridge at Livingston. Its a bad spot for wind.
Wind blew over a semi there about 3 years ago. They put the gate down at the exits to run traffic through town since it was not safe there or on the east hill either I suspect. Some eastern trucker did not want to be bothered so he drives around the gate. HIS truck blows over on TWO new SUVs belonging to the Sheriffs Dept, the deputys were out working the accident but still had to do some dodging.
The little weather station registered a gust or two at 150 mph gust and then the wind speed gizmo broke...
I don't know what they charged the trucker with but the list was pretty long as I recall.
Dan