Marcus’ 4 a.m. Monday forecast INDIANAPOLIS (WISH) — Extreme cold settles in for the extended period with several nights of overnight lows below zero. Today: The state is under an extreme cold warning for today and Tuesday, as windchills could dip to 25 below zero or lower. That can l ead to frostbite occurring on exposed skin in 15 to 30 minutes. We should see plenty of sunshine for our Monday, but it will not help temperatures as arctic air settles in over a very deep snowpack across the area. High temperatures will top out in the upper single digits and lower teens. Tonight: Temperatures will dip to below zero across the air, and there will be mainly clear skies overnight. Tuesday: Tuesday will be slightly warmer under partly cloudy skies. The one concern we do have for Tuesday is winds will start to pick up a bit, gusting up to 30 mph. Now, well, much of the snow should settle in after a couple of days. There will be the potential for some blowing and drifting with any top layer of light snow that hasn’t frozen in completely. This could lead to some drifting and some lower visibility at times through the day. Bitter cold: Unfortunately, the rest of the week looks frigid, as several Arctic air masses will continue to push into the region. Eyes will be in the mid teens for the rest of the week, and overnight lows will be at or below zero. 7 day forecast: Very limited precipitation chances in the extended forecast. There could be some isolated snow chances to start off the weekend Saturday, with a strong north flow bringing down some lake-effect snow showers across the area. ...read more read less