Also, the model probably wouldn’t be able to pick up on where localized bands of particularly heavy snow might set up. This event scored a 2 in this region for moderate snow accumulation and intensity, and for coinciding with the Wednesday morning commute. 5:55 p.m. updateModels have presented a real dilemma this afternoon with respect to whether to increase the snow forecast for Wednesday. What other factors could limit snow accumulation? They now have a strong upper-level disturbance that takes an ideal track to place the D.C. area in a band of heavy snow Wednesday morning.

Source: Washington Post March 20, 2018 17:06 UTC