Fathers from Raleigh to Portland rejoice. A fully pleasant weekend is finally in the works after up to eight straight weekends of rain, cool temperatures, or both.
High pressure at the surface will emerge from Ontario Friday and slide southeast through Saturday before parking itself off the coast of Virginia. Its presence over the Northeast and along the coast will keep most of the region dry through Sunday. Further, winds will change direction from the northwest to the southwest as the high makes its way to the coast, directing warm air towards the Northeast. Each day through Monday will be warmer than the last, with temperatures becoming unseasonably warm by Sunday.
This initial surface high pressure is associated with the last of a series of upper-level low pressure systems that have brought consistently below-average temperatures to the Northeast. This is also the same high pressure system that tailed the cold front responsible for Wednesday’s severe weather outbreak, which resulted in a tornado that ravaged Wilkes-Barre, Pennsylvania. Its parent upper-level trough is being pushed eastward by an expanding ridge of high pressure aloft.
Saturday temperatures will warm to about normal across the Northeast, from the low and mid 80s in the northern Mid-Atlantic and southern New England to mid and upper 70s in the higher elevations of New York, Pennsylvania and New England. With the system of high pressure passing overhead, skies will be mostly clear. Some high cirrus may develop, but otherwise it will be sunny throughout the region.
Sunday temperatures warm further as the upper-level ridge approaches, with temperatures reaching the upper 80s to around 90 south and east of the Appalachians and the low to mid 80s elsewhere. With the surface high further offshore, there will be more clouds Sunday than Saturday, but most of the Northeast should remain dry. Exceptions include parts of western New York and Central Pennsylvania, where scattered thunderstorms may develop in the afternoon and evening.
Showers and thunderstorms will approach the North Country of New York and Northern New England Sunday night and Monday ahead of a cold front associated with a shortwave and cyclone in Quebec. Temperatures will remain average to slightly above average, but these areas will escape the record-testing heat set to face the Northeast Monday ahead of this cold front.