In the gray shaded area, expect to see some snow in the air, but it will likely not stick. Just a sign of things to come. There could be a few snowflakes flying all the way down in Chicago later this week, Wednesday. That storm will funnel in our cold air for late week. There may actually be some snow in the Berkshires and Green Mountains on Friday morning. We are not talking about a snowstorm, but there could be some Snow Showers out there with a possible coating of snow in the high elevations and mountains.
The 80 of today is long gone. Highs will stay in the 60's through Thursday and Friday morning and then with the passage of the cold front associated with the massive midwest snowstorm, temperatures will nosedive Friday afternoon through the 50's and probably hover in the upper 40's all afternoon. Highs in the lower 50's are likely Saturday and Sunday with a HARD KILLING FREEZE likely both nights. No escaping it this time, except if you live in the city of Boston.
Lows Sunday morning will likely be in the 20's throughout much of the suburbs, and up in the cold spot of New England, Berlin, NH, lows could bottom out in the mid teens with great radiational cooling. I'll be in New York this weekend...so I'll be posting for the rest of the week and then probably take the weekend off.