IRON MOUNTAIN — Power outages and tree damage may occur as a winter weather advisory is in effect from 7 a.m. today to 7 p.m. Sunday, the National Weather Service said.

The forecast for Iron, Dickinson and Menominee counties calls for ice accumulations up a quarter-inch today and tonight. Additional ice and snow accumulations are possible Saturday night and Sunday.

Wet snowfall up to 2 inches is possible Saturday night through Sunday, forecasters said.

“Travel could be very difficult,” NWS said.

Freezing rain this morning was expected to be followed by rain. Temperatures may climb to about 35 degrees. Rain was expected to turn to freezing rain overnight with a low around 29.

On Saturday, a wintry mix of rain, snow and freezing rain is expected. The predicted high is 38 degrees with a low around 27.

The Sunday forecast again calls for mixed precipitation with a high near 35 and a low around 21. There is also a chance of snow Monday morning with a high near 36.

For the Iron Mountain area, AccuWeather predicts a trace of ice accumulation early Saturday, then a quarter-inch to an inch of snow and ice from 8 p.m. Saturday through 5 a.m. Monday.

To the south, NWS predicts a chance of thunderstorms with possible hail late this afternoon through tonight in northeast Wisconsin. The region should also expect snow and ice accumulations Saturday night and Sunday.

Widespread precipitation could lead to fast flows and minor flooding along shorelines of area rivers and streams early next week, NWS said.

Across the U.S., AccuWeather predicts at least 100 million people will be at risk for severe weather from Saturday to Monday. The threat on Saturday — including hail, high winds and some tornadoes — extends from eastern Oklahoma, eastern Kansas and southeastern Nebraska to western Missouri, northwestern Arkansas and southwestern Iowa, meteorologist Alex Sosnowski said.

On Sunday, the zone for severe thunderstorms moves into the Ohio, Tennessee and Mississippi valleys. On Monday, the risk will shift eastward into Pennsylvania and New Jersey, along with northern Florida and southeastern Louisiana, according to AccuWeather.