There has been this sort of unwritten rule the the weather on Mothers Day must be beautiful. I don't quite know where it comes from but we can say based on what we are seeing that this definitely WILL NOT be the case this Mothers Day. The blocking pattern that has been impacting the weather across the Eastern United States is about to break down as the pattern shifts. It is usually at these moments that the atmosphere gets a bit of a headache that it has to relieve. It seems to want to do it in the form of a coastal low and a mid May noreaster to come right over the weekend.
All the major weather models would point to a 2 to 4 inch rainfall across much of the interior Middle Atlantic states up to Southern New England. The late afternoon model run has shifted slightly northwestward but the general idea is that we are in the bowling alley here for a heavy rain. It is often that when blocks break down it creates tension in the atmosphere which needs to be relieved somehow. The disappearing block opens the door for low pressure...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2017/05/09/mothers-day-weekend-looking-like-a-washout/