Summer Like Heat and 80s to Low 90s Return to Pennsylvania New York and Mid-Atlantic States This Weekend as High Pressure Heat Dome Builds Over the East Coast Into Early Next Week
PENNSYLVANIA — A strong high pressure heat dome is set to build over the East Coast this weekend and into the first half of next week, driving a dramatic return of summer-like warmth across Pennsylvania, New York, and the broader Mid-Atlantic with highs expected in the 80s and some aggressive model guidance pushing temperatures into the low 90s, effectively skipping spring and delivering a full summer weather pattern across the region.
Heat Dome Building Over East Coast This Weekend
A strong high pressure system will pump warm southerly air northward into the Northeast and Mid-Atlantic corridor beginning this weekend. The ECMWF model clearly depicts the heat dome centered southeast of Pennsylvania with well above average temperature returns spreading across the entire region as the high pressure builds through late weekend and into the opening days of next week.
The pattern represents a dramatic shift from the cooler conditions earlier this week to a full summer-like warmth regime within just a few days.
Highs in the 80s With Low 90s Possible
Temperatures across Pennsylvania and the Mid-Atlantic are forecast to climb into the 80s during the peak of the heat dome’s influence this weekend and early next week. More aggressive model runs suggest isolated readings into the low 90s cannot be ruled out, particularly across interior Pennsylvania where urban heat and southerly flow combine to push afternoon highs to their highest levels of the spring season so far.
These readings are well above average for mid-May and will feel dramatically different from the cooler pattern residents have experienced throughout much of the month.
Above Average Temperatures Expected Through Second Half of May
While the most intense heat is not expected to persist long-term, the broader pattern signals that the second half of May will feature above average temperatures across Pennsylvania, New York, and surrounding Mid-Atlantic states. Residents should prepare for a sustained period of warmer than normal conditions through the remainder of the month as the summer-like pattern takes hold across the region.
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