No change in the forecast this morning. The coldest air of this outbreak is over us as we start the day, but we will see temperatures try and climb slightly over the coming few days. High pressure is already off to the east this morning, sitting over western Ohio. This means south winds will be developing through the day. We expect sunshine to dominate again today statewide, and another minor high will nose in for the overnight tonight into tomorrow. This arriving high may try and trigger some minor lake effect snows in Michigan and even into far northern Indiana. These flurries continue in lake effect areas through tomorrow, while the rest of the state sees only a slight bit of clouds mixing in with sun.
Overnight tomorrow night, a quick moving clipper wave brings some light snow to the northern half of the state. Snow totals overnight tomorrow into Friday early morning will be a coating to an inch or so from I-70 northward, and south of I-70 we see nothing. This snow is out of the state by mid-morning Friday and most of us will see some sun by midday. However, our next front is quickly approaching. Clouds will increase Friday afternoon, and by evening snow will start to move into the state. Snow continues through mid-morning Saturday, and we expect totals of a coating to 2” in most areas, and an occasional 3” total in east central and northeast Indiana. Coverage of snow will be nearly 70% of the state. Then from Saturday afternoon on through the rest of the weekend we expect strong north winds to trigger lake effect snows in northern Indiana, and clouds off and on through the rest of the state. Snows in Porter, Laporte, St. Joe and Starke counties could be significant, while lesser snows can be seen in Elkhart, Kosciusko, Lagrange, Noble and Whitley counties. Cold air will blast the entire state in this period, and we expect low wind chills thanks to the strong winds. Temperatures will be colder to finish this weekend and for New Year’s Day than what we are seeing now.
Flipping the calendar into 2018 brings more cold air. We think we can string together an entire week of temps in the single digits and below zero. Only a few flurries are expected in this brutal cold push, but it will not take much to trigger flurries, so we keep an eye out. Late in the week, a nice wave comes up from the MO valley for late Thursday night (4th) through Friday (5th). This could bring several inches of snow to all of the state, as cold air will have been in place for a good number of days leading up to the event.
In the extended window, we could be looking at another major winter storm arriving around the 7th-8th of January as a low comes up from the SW again. This system and this track implies plenty of moisture, but timing will need to be watched. Then we have another snow maker coming for the 10th and 11th. The pattern looks to get very active as we start the New Year, and cold air is the driver of this pattern.