WEATHER SUMMARY THROUGH NEXT 72 HOURS


There is nothing more aggravating to this meteorologist than seeing one of those "mixed bag" types of storms. Yet that is what is present now over the Northeast, as a marine later and IcA intrusion fight for control as a compact, strong low center roams just south of LI NY. The low will get kicked toward the Grand Banks as a new impulse (the last in the CA "deluge maker" series) rolls through the Upper Midwest and Great Lakes. But before the disturbance pulls out to sea, a good chunk of the Northeast away from the coast will be plastered with heavy snow and ice, with coastal flooding and wind gusts an issue along the shoreline of New England and LI NY. Then partly cloudy and cool, not cold, conditions will settle into the eastern Seaboard behind the departing cyclone.

Incredibly, the feature which brought tremendous rain yesterday to CA will be relatively dry as it slides rapidly eastward over the next 48 to 72 hours, washing out over NY with little fanfare. What is important about this system is its linkage with colder air, tapping a building reserve of cA values in central and eastern Canada. With a PNA-styled ridge taking shape from BC into the Desert Regions (and keeping heavy rain limited to coastal communities from CA into Vancouver Island), a 500MB mean trough will begin to take shape from ON into the Southeast. Energy moving through the base of the trough should initiate surface cyclogenesis in SE GA late Thursday, and that new low center will be watched for the possibility of spreading important frozen precipitation over the Mid-Atlantic and New England states as we head toward the weekend.