Good afternoon, The Heat Advisory remains in effect until this evening. On Friday, we are expecting just enough drier air to keep Heat Indices between 90 and 95 degrees, just shy of Heat Advisory Criteria. However, very oppressive heat and humidity will return this weekend in a big way. Heat Indices could reach 100 degrees on Saturday. On Sunday, actual temperatures might even approach 100 degrees, with Heat Index values nearing 105 or higher. Heat Advisories or Excessive Heat Watches/Warnings will likely be issued for this weekend. Attached are two graphics highlighting these expected conditions. -- Glenn Field, Warning Coordination Meteorologist If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>