Euro AI is consistent with the idea of coastal development on Sunday. Definitely the solution PHL-BOS is rooting for. Don’t know how much snow for our area. Probably 1-3”ish?
With potentially another Xmas torch staring us in the face, I decided to make a plot to see if it’s been as real as it feels or has been for years. So this plot is BWI above normal and much above normal (>=10F) occurrences from 2005-2024. Thicker lines are the year by year counts for each calendar day and thin lines are smoothed by 7 days. Short answer is yes…and the week after Xmas before new years has been the most torch prone.
The warm pool moving eastward would be a good thing for us. Basically puts the background conditions to support the strongest convection (essentially the MJO) in a more favorable position for eastern troughing.
Last Friday's storm almost disappeared for DC-north within 36 hours? So I don't expect much consistency on a weak vort in fast flow until like 0z Thursday.
The torch/SE ridge progs have stayed firmly beyond D10 for weeks now. Maybe this one is different but I want to see it inside of D7 first before I buy it. Persistent MJO phase 8 argue against it.
Big divergence in ensembles toward Xmas. GEFS keeps an eastern trough although the western ridge pushes the trough axis over us and even offshore for a time. EPS goes full SE ridge with a deep western trough developing. Geps somewhat in between but leaning more toward EPS.