Temperatures across the Northeast will be riding a roller coaster as numerous types of fronts move through the region. The upper-level pattern will be favorable for intense heat across the region through Friday, but what happens at the surface will determine the actual air temperatures.
A backdoor cold front will then move into New England and northern portions of the Mid-Atlantic on Wednesday. This cold front will usher in a cooler and drier air mass. Despite this cooler feel outside, temperatures will still be above average for many with widespread high temperatures in the 80s once again. Coastal sections and parts of the Mid-Atlantic may be a touch below average temperature-wise. The lakefront of Lake Superior may be the Northeast hotspot with highs approaching 90 degrees, which may break the daily record high for a location or two.
A new warm front will push through much of the Northeast on Thursday, but it will sort of do the opposite of what you would expect. Now while it will bring in a more moist air mass, temperatures won’t really warm up. The only area where temperatures will rise will be in northern New England where the warm front will not have reached yet. Highs in this region will be in the 80s, which is up to 25 degrees above normal. Meanwhile the region as a whole will experience seasonable temperatures, generally in the 70s and 80s. Some coastal towns will be even cooler, staying down into the 60s.
By Friday, it will warm back up for many thanks to an increase in the southerly flow. This flow from the south will allow for many thermometers in the Northeast to measure a high temperature in the 80s. A few areas in the Mid-Atlantic may even touch 90 degrees while eastern New England becomes cooler with highs generally in the 70s. These temperatures will mainly be 5 to 10 degrees above average.
Cooler, more seasonable weather will then return for the weekend as showers and storms continue thanks in part of the remnants of Subtropical Storm Alberto and a weak, develop, coastal low pressure.