An ice skater glides along a pond in Butte, Mont., but the weather to the east is not so calm. Much of the Midwest and Great Lakes region received an early jolt of wintry weather Monday as snowfalls of up to 10 inches closed schools, toppled power lines and snarled travel. A blizzard warning was posted in parts of Wisconsin. In hard-hit Iowa, Iowa State and Drake universities were among scores of schools and businesses that closed their doors or delayed opening as high winds and heavy snows brought much of Iowa to a standstill. The Dubuque Regional Airport was closed, with snowdrifts of 2 to 3 feet.