LAKESIDE, Mont. -

High winds mean choppy waters, and boaters are braced for waves that could top five feet. Our cameras caught calm waters earlier on the east side of Flathead Lake, but the western shores were getting hit a bit harder.

It could stay this way or get worse - a wind advisory from the National Weather Service says portions of the Flathead Valley, from Polebridge to Polson, could see 40 mile per hour gusts.

Boaters know too well how dangerous it can be to boat in these circumstances and are urging people to stay on land.

"Anytime the weather gets windy like this you have an opportunity for capsizing from not controlling a boat properly," said Mike Phillips of The Docks, a Lakeside Marina restaurant. "The wind can kind of catch you off guard and push you from where you want to be. So you always want to try and stay into the wind but if you see big curls coming up like this get to shore!"

The wind advisory has been issued until 9PM.