A strong clipper will track out of the Midwest and across the Carolinas before emerging off of the Mid-Atlantic coastline where all indications are that it will bomb out into a Nor’easter likely slamming New England with Blizzard Conditions.
Winter Storm Watches may be issued by the National Weather Service for parts of our area as the potential exists for 4 or more inches of snow overnight Sunday into Monday.
Let’s take a look at the latest GFS (12z) showing how this clipper may track:
Temperatures: Starting out in the middle 30s and then rapidly dropping into the middle 20s. Highs on Monday probably won’t make it above freezing for most of the region.
The latest SREF (Short Range Ensemble Forecast Models) for the three main airports (National, Dulles & BWI) currently forecast anywhere between a coating and 7″!
The latest GFS shows a band of heavy snow developing across northern Maryland just after midnight on Sunday and then sinking south into the Washington Area through the morning rush hour.
The latest guidance suggests that periods of snow showers may continue through Monday night as an upper level disturbance passes over the Region.
My biggest concern at the moment is whether or not the clipper loses most of its moisture as it crosses the mountains. Also, I have seen scenarios where the coastal storm develops and robs energy from the weakening clipper which can drastically reduce snowfall amounts. Stay tuned for updates.