Hot and humid conditions are expected to envelop Massachusetts on Friday, with temperatures climbing above 90 and heat index values, or “feels like” temperatures, likely to clear 100.
The warmest temperatures are expected in the valleys and the Boston metropolitan area, while some onshore winds will help keep the South Shore slightly cooler. Temperatures in Boston, Worcester and Springfield are expected to reach 95 on Friday, with intense humidity making it feel closer to 102.
National Weather Service forecasters have set down a Heat Advisory covering nearly the entire state, except for the Berkshires, Cape Cod and South Coast, warning that the heat and humidity could be dangerous if no precautions are taken.
“Make sure you have a location to stay cool, stay hydrated, take frequent breaks if working outside, and avoid strenuous exercise outdoors during the afternoon,” forecasters wrote.
There is also a chance for showers and thunderstorms on Friday.
The conditions are such that Massachusetts could see a “handful” of strong to severe storms.
“Main threat will be damaging winds followed by localized heavy rainfall,” forecasters wrote. “A few storms may be capable of causing localized flash flood impacts to areas, especially flood-prone ones.
“Additionally, winds aloft should keep storms moving, which will prevent a storm from sitting over an area dropping heavy rain,” forecasters added.
Any storms that do form are expected to move through the state between roughly 2 p.m. and 10 p.m., with storms developing from Western Massachusetts to the southeast part of the state.
Temperatures will fall to the mid to high 60s by Friday night. The heat will have dissipated by Saturday, with temperatures reaching the low to mid-80s. A drier airmass should be in place following Friday’s storms.
More storms are possible on Sunday, with higher amounts of moisture in the air.
“Timing and location of best chances are still lower confidence,” forecasters wrote. “Chances will be higher for the afternoon-early evening timeframe.”
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