The first "real" warm up of the year will be felt across the Ohio Valley and Great Lakes region this week, with highs reaching into the 60s for many, and even into the lower 70s for portions of Indiana, Illinois, and Ohio on Wednesday and Thursday.
This is thanks to upper level ridging pumping in warmer air from the south and supported by the warm sector of an approaching low-pressure system from the west.
This low-pressure system will soon be called "Winter Storm Ulmer" by The Weather Channel, though winter storms are not officially named. Ulmer is expected to be the strongest low-pressure system to ever develop in Kansas and will bring blizzard conditions to much of the central and northern Plains Wednesday night into Thursday morning.
Lighter snowfall is expected across the Upper Midwest and Great Lakes Thursday. Additionally, Ulmer is likely to generate some severe weather ahead of the snowfall across the Mississippi Valley and potentially into the Ohio Valley on Wednesday and Thursday.
Although much above normal temperatures will be in place mid-week across the Ohio Valley and Great Lakes regions, winter is not over yet. For around a week now, long-range model data has been suggesting a return to below-normal temperatures for the last half of March.
This period also looks to remain active, but accumulating snowfall will be more limited to overnight timing due to the strengthening sun rays and warmer average temperatures, unless snowfall rates are high, or you're in the Upper Midwest.
Beth Carpenter is a co-founder and meteorologist at Thermodynamic Solutions, based in Indianapolis. You can reach Beth at firstname.lastname@example.org.