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[8:00 AM] June 30, 2021 | Oppressive Heat Continues/ Severe Thunderstorms Today

Strong to severe thunderstorms are expected today with an approaching cold front. The Storm Prediction Center (SPC) has placed much of state in the areas from Western to Eastern MA at enhanced risk for severe weather, Southeastern MA at slight risk, and the Cape and Islands at marginal risk. In terms of timing, thunderstorms are expected between the hours of 2 PM and 10 PM. The primary threat with these storms is strong to damaging wind gusts of 50- 70 mph, hail, frequent lightning, localized heavy downpours, and flooding.

For Thursday, rain showers will develop late morning with a few thunderstorms possible Thursday afternoon. Rain could be heavy at times and periods of rain will continue across the state Thursday night with thunderstorms ending Thursday evening. The chance for showers will continue through the day Friday along with the chance for an isolated thunderstorm.

Impacts/Potential Impacts


  • Prolonged period of oppressive daytime heat and humidity dangerous to those outdoors.
  • Strong to severe thunderstorms for Wednesday:
  • Damaging straight-line winds with gusts up to 50-70mph. Downed trees and powerlines, and isolated structural damage associated with the strongest storms

Forecast Overview

Heat advisories remain in effect until 8:00 PM tonight except for Cape Cod and the Islands. For the latest NWS advisories, watches and warnings in MA visit

Preparedness/Safety Information

Flood safety tips:

Stay Informed

For additional information and updated forecasts, see (National Weather Service Norton) and (National Weather Service Albany)

Utilize MEMA’s real-time power outage viewer to stay informed about current power outages in your community and region, and across the state, including information from utility companies about restoration times:

Massachusetts Emergency Management Agency
MEMA’s Facebook page
MEMA Twitter @MassEMA
Federal Emergency Management Agency
National Weather Service Boston/ Norton, MA
National Weather Service/Albany, NY
National Weather Service Weather Prediction Center

National Weather Service Storm Prediction Center
Northeast River Forecast Center

National Hurricane Center