Details here, video here.) The first system will be followed by relatively quiet weather Friday and Saturday. Clouds will thicken Saturday night and snow could start early Sunday. The upper atmosphere could be getting pretty busy in our area, with the Polar and Subtropical jet streams hooking up to bring the potential for the heaviest snow totals of the season by Sunday night. An area of low pressure in the Ohio Valley would be supercharged by the jet stream diving southward out of Canada and phasing with the southern stream jet in this scenario. (See attached model depiction of Sunday afternoon air pressure and precipitation, via weatherbell.com. That precip over central Indiana would be heavy snow.) That snow will be followed by the coldest air of the season as an Arctic air mass invades Monday. Temps will go below zero by Monday night and are unlikely to get out of the single digits Tuesday. It will stay below freezing all week.]]>
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