Good afternoon, Following is an update to the briefing sent this morning regarding elevated to dangerous heat indices late this week, along with a risk for severe thunderstorms Friday. *Changes Since Last Briefing:* Heat Advisories are in effect for Friday from 11 AM - 8 PM for a large portion of Southern Connecticut. Although we still expect heat indices to become elevated tomorrow in the mid 90s, dangerous heat indices remain expected on Friday, with values in the 95 to 103 degree range with isolated values of 105+ degrees. We may also see elevated heat indices in the mid 90s along the RI and MA South Coast Friday, but southwest winds off the water may cut into the heat to an extent. Strong thunderstorms are possible on Friday as well, capable of localized straight-line wind damage as well as torrential rainfall capable of isolated instances of street flooding. Although there are still some details to iron out, a best estimate for the arrival of these storms is between 3 and 10 PM. Expect the next update to this briefing on Thursday morning. Thank You! Meteorologists: Andrew Loconto and Candice Hrencecin If you have any questions or would like more information, please don't hesitate to contact us. You can reach us via: email: box.operations@noaa.gov phone: 508.622.3280 Slack/NWSChat 2.0 <https://nwschatws.slack.com/> (for approved partners) social media: Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>