* WHAT...For the first High Wind Warning, southwest winds 25 to 35 mph with gusts up to 70 mph. For the second High Wind Warning, west winds 35 to 45 mph with gusts up to 80 mph expected. * WHERE...East Glacier Park Region Zone, and Eastern Glacier, Western Toole, and Central Pondera, Northern High Plains, and Southern High Plains. * WHEN...For the first High Wind Warning, until 9 AM MST Saturday. For the second High Wind Warning, from 9 AM to 8 PM MST Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.