Although there's been plenty of sunshine to start our workweek, clouds and snow are on the way. The storm system, which will bring the wintry weather, is currently in the middle of the Ohio Valley headed east. You can see the spinning low pressure area in the middle of the satellite image above. This will redevelop a new storm south of New England on Tuesday, which will head out to sea Tuesday night and Wednesday.
Snow should arrive in greater Boston around midnight, but will be falling earlier by a few hours across the Berkshires. When you get up Tuesday morning snow will be falling at a moderate clip and I expect it to continue to accumulate. The map below shows current estimates for snowfall totals.
The snow will be heavier and wet right along the coastline, therefore it will not accumulate as efficiently and it is likely to mix with or even change to rain for a time south of Boston. A later change or mix will allow for slightly higher totals in the city, but if it changes to a mixed bag earlier the lower estimates will result.
Either way, all areas are likely to be plowing and shoveling. I expect widespread school cancellations and some delays at Logan airport as well as cancellations of smaller flights.
The winter severity index below is an estimate of how impactful these types of storms can be. Notice we are at the lower end of impact meaning while things will be slow Tuesday, it's certainly not a day in which you won't be able to get out and about.
The precipitation will wind down on Tuesday night and we should see a return to some sunshine for Wednesday with melting temperatures in the lower 40s. It turns somewhat wet Wednesday night and Thursday with rain showers. Another storm arrives for Friday or Saturday, with snow and rain depending on the exact track of that particular storm.
