So the US has been blistering hot this past week. While not a record, Westfield, MA had 98 degrees F yesterday afternoon for a high! Add to that high humidity and it is pretty uncomfortable.
So today, we are expected a cold front to pass through the area. Notice the station model data from this report from the AMS Datastreme Project.
You can see winds are coming from the south for New England whereas in Canada, the winds are coming from the west since the cold front has already passed the area.
Cooler air (from the west and northwest) are coming to New England!