I also live on the east side of Methuen. West Methuen especially towards Dracut and Pelham is better for snow and pack retention. I have lived in the area my entire life. I have noticed that the route 213 exit off of 93 is often a transition zone. There have been many times when I have have seen it snowing/mix at that merge only to have the snow or mix becomes more of a rain/mix the further I drove down 213 east.
Salem even in the area of the mall is better than the east side of Methuen. I was in Londonderry, Sandown and Pelham on Saturday to look at homes and it was clear that they had received less snow from the Feb 1 storm than Methuen but those areas are better for the marginal events and pack retention. In our area there are going to be tradeoffs.