Northwest Indiana saw heavy snow and power outages in a lake effect snowstorm that began Sunday and continued into Monday.

O'Hare International Airport was closed overnight Sunday into Monday as a serious early-season winter storm pounded the area.

A winter storm watch and warning are in effect near the Great Lakes where heavy lake effect snow and strong winds are expected through Monday. Some areas could see up to a foot of snow, creating “dangerous to impossible travel conditions,” according to the National Weather Service (NWS).

Just as the Mammoth Mountain Ski Area prepares for the 2025/2026 season opener tentatively planned for Friday, Nov. 14, a significant weather change will bring a snowstorm to the Eastern Sierras.

The National Weather Service has issued a Winter Storm Watch for Cook County, parts of Will County, and northwest Indiana counties for the potential of high-impact lake effect snow from late Sunday into Monday. Chief Meteorologist Albert Ramon gives a timeline of what to expect.

The Great Lakes’ water is usually much warmer than the air temperature in early November. That is one factor that feeds a storm system as it travels over the Great Lakes. The warm water acts as an energy source, and causes a storm system to reach peak strength over Lake Superior, Lake Michigan or Lake Huron.

On Monday at 2:06 p.m. the NWS Reno NV released a winter storm watch valid from Thursday 1 a.m. until Friday 4 a.m. for Lassen-Eastern Plumas-Eastern Sierra counties.

There are school closings and delays in the Chicago area Monday morning after an early-season snowstorm blew in overnight.

For today’s MLive Michigan Weather Forecast, watch the video below or click here to watch on YouTube and join the chat and comment. Today’s forecast: Localized heavy snow will still continue today. I’ll show you how much additional snow is expected. We also have warmer air on the way for later in the week. So it won’t be a totally winter forecast.

Chief Meteorologist Lisa Teachman says the wind will switch out of the south and enable a warming trend for all starting Tuesday. Rain chances will finally return for many this weekend.