While Mass. sees heat wave reach its peak, thunderstorms could make a soaking return
A hot and humid day in Massachusetts could beget another on Tuesday, as the heat is expected to peak that day with heat indices likely leaving conditions feeling hotter.
Combined with minimal cloud cover, heat indices should leave much of the state feeling 5 degrees hotter or more, according to the National Weather Service.
Heat indices could leave Worcester and Springfield feeling like it's between 100 and 105 degrees, the weather service said in a post on X. Boston's could be lower, feeling like between 95 and 100 degrees. Around the Cape, heat indices could feel like the 90s.
During this time, an ongoing Heat Advisory will be in effect covering most of Massachusetts except for the Cape and Islands and Berkshire County. In effect since 11 a.m. Monday, it's expected to last until 8 p.m. on Wednesday.
"Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors," forecasters wrote. "Take extra precautions when outside. Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke."
While the high heat and humidity should wane on Wednesday, some unsettled weather that day could bring thunderstorms back to the region, forecasters said. But before this happens, daytime highs could see heat indices leave temperatures feeling like the mid- to high 90s instead of the 100s during the day.
The timing for Wednesday and Thursday's potentially stormy weather remains unclear to forecasters. The arrival of a cold front toward northern/Central Massachusetts could produce widespread showers and thunderstorms south of the Massachusetts Turnpike. Precipitable water levels could be between 1.6 to 2 inches, roughly between 150 and 160% above normal.
"While the exact timing and location of storm formation is still up in the air, confidence is increasing in seeing high rainfall totals Thursday," forecasters wrote. "Once the showers move out Friday morning, [we're] expecting a much cooler (and drier) airmass to push into southern New England, allowing for a break in the high heat and humidity."
By Friday, conditions could reach cooler levels with highs in the 70s during the day, forecasters said.
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