This update covers the shifting high pressure system and what it means for your outdoor plans. We discuss how the jet stream shift is weakening the intense heat and bringing a higher chance of widespread showers and thunderstorms to the region. #july4th #250thanniversary #northeast #east #heatwave #hot #thunderstorms #forecast Whether you are planning July 4th events or just tracking the temperature, this breakdown helps you prepare for the changing conditions. By Sunday, the core of the heat moves off the southeast coast, bringing temperatures into the 80s and 90s across the eastern US. We analyze the incoming pattern changes so you know exactly when to expect relief from the heat wave. » Subscribe now for more videos from AccuWeather: bit.ly/2TQgT0O Download the AccuWeather app: » iOS: apple.co/3gwaSnL » Android: bit.ly/3xpmwGw » AccuWeather is the world’s most accurate source of weather. But don’t just take our word for it. Find out how we make a diffe...