We are slowly working through a snowy week, and are making a few minor changes to our upcoming forecast. Snow will be exiting the state by midday day today, and we still look for the biggest accumulations in southern Indiana, either side of a line from Princeton to Cincinnati. In that area we can see 3-5 inch snow totals. In general, southern Indiana will see storm total snows in the 1-5” range, while northern Indiana will be 1-3” at best, and mostly in the lower end of the range.
High pressure settles in over Indiana overnight tonight and will park in Southeast Indiana by tomorrow morning. This brings colder air back, and we do expect some spotty subzero temps tomorrow morning, mostly in NW and north central Indiana.
Our next snow event for Friday looks be farther north now, and may end up missing most of the state. We will keep snow in the forecast for Friday north of US 30, but will see temps reach to freezing or above for daytime highs from US 30 southward. Moisture leads to 1-3 inches of snow in the northern most row of counties in Indiana Friday, and a coating to an inch down to US 30, but that it all. The rest of the state sees a mixture of clouds and sun.
However, we do not escape the snows. What Mother Nature takes out for Friday, she puts in for Saturday night and Sunday. We now see a much stronger secondary wave coming for that period, and it can bring 3-6 inch snows to the northern half of the state, and 1-3 inches south. This is a new wrinkle. Previously, we had been looking at most moisture coming out in a warm front scenario. This change moves the best precipitation to the cold front passage for the last half of the weekend. It also can lead to a larger coverage area for snow.
Bitter cold air is in for Monday. We expect subzero temps over most of the northern half of the state Monday morning. A slow moderation in temps comes for Tuesday, although temps stay chilly. Then Wednesday we see normal to above normal temps statewide, with most of the state above freezing for highs. Clouds are in for next Thursday, and we can’t rule out scattered light snow showers for next Thursday night (the 15th) into Friday, although the best chances for snow may be limited to the northern half to third of the state.
The extended forecast is unchanged, with only 1 threat of precipitation coming for the 19th into the 20th. The system still looks strong, and we think we can see up to 1.5” of liquid equivalent precipitation.