Cold High Pressure is expected to position itself over New England. Arctic air in this situation builds a wedge east of the Appalachians while moisture from a Low approaching west of those mountains overruns the cold air. At the surface snow quickly changes to sleet and freezing rain. A secondary low tends to form near the east coast and take over as a primary storm as it moves northward.
Therefore a scenario that is believable and common in NC and VA classic ice storms appears to be very likely between the 26-28th.
|Miller-B storm approaches west of the Appalachians setting off a classic Cold Air Damming |
Scenario. Diagram by Dean Grubbs.