SOUTH BEND – Winter weather has arrived in the area. A heavy band of lake-effect snow coincides with strong winds. Although the temperature was 21 degrees on Thursday morning, it felt like 6 degrees below 0 outside.

Winter storm warning in effect

The National Weather Service has declared a winter storm warning for the area until 1 a.m. Friday.

What it means: Heavy lake snow accumulating between 2 and 7 inches today. Wind gusts up to 45 miles per hour.

Who is affected? The warning is in effect throughout northern Indiana and southwestern Michigan. Counties listed include St. Joseph counties in Indiana and Michigan, as well as Elkhart and Berrien counties.

Effects: Travel could be difficult as both morning and evening commutes could be affected. Gusts of wind could knock down branches.

How to stay safe: “If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency,” advises the NWS.

“Individuals are encouraged to remain indoors until conditions improve,” the advisory continued. “If you must go outside, dress in layers. Multiple layers of clothing will keep you warmer than a single thick coat. Cover exposed skin to reduce the risk of frostbite or hypothermia.”

As always, U.S. 20/31 Beltway is among the first roads in the area to become slippery and dangerous.

According to The Tribune’s news affiliate WNDU, wind chills could drop even further Thursday, possibly as low as -15.

Be prepared for surprises: Lake effect conditions can create very different situations within just a few kilometers. Visibility can vary greatly depending on time and location. “Be prepared for rapid changes in weather, visibility and road conditions,” NWS urges.

How long do we need protection?

The National Weather Service forecasts rising temperatures and decreasing winds starting Friday.

By Sunday, temperatures are expected to rise to almost 47 degrees with sunny skies.

This article originally appeared on the South Bend Tribune: Winter storm hits South Bend. 6 things you need to know to stay safe.