The image below focuses on the current snow/rain event taking place of the northeast. This is a verification of the 3 days prior GFS runs and where they forecasted the location of the low pressure at 0, 6, and 12 Z on the 19th of March. The red shows where HPC (WPC) classified a the low pressure affecting the northeast these past 12 hours. The most recent model was 12 Z on the 18th (green) and it actually had the low pressure center lagging well behind where it was seen in the observed. The best model was the 12 Z run on the 17th that developed the low over New Jersey at 6 Z and moved it of into the Atlantic much like the observed. The main area where these models missed was in timing as they all eventually bring the low pressure into the general area of its current location.