I think one element I have largely neglected that needs to become a point of focus is the WPO. That is what killed me last year and this year when I was pretty accurate with everything else. It used to be the AO/NAO, but I have been decent there past few years.
No, I would never advise snow removal companies to disengage in March at this latitude if doing this professionally.
As far as the T-shirt, getting one ready....."Eastern Mass Weather....wipe well with our forecasts"-
There were some silimilarities to seasons that did just that, but it didn't work out. Just have to own it and try to learn from it. December and February were awful, but I think January and March will have been decent calls when all is said and done.
Looking at some stuff, I think the next 3 seasons will be an uphill climb....try to get near climo snowfall and if you are lucky enough to do so, then take it and run. However, I think the late 2020's will have a pretty epic flip.
Gotta know when to fold 'em. Wasting that mid Februay pattern that was about 10 days shorter than advertised was it for me.
Remember when there was talk of it lasing though March?