Significant Weather Weekly Outlook
At this time, high heat and humidity for Tuesday and Wednesday look to be the most significant weather ahead for this week. Temperatures will likely reach between 95 and 100 degrees across most of southern New England (just a tad cooler on the immediate south coast, Cape Cod, and the Islands) with dewpoints 65 to 70 degrees for Tuesday and Wednesday. This could result in heat indices in the upper 90s to around 105 degrees and high enough to meet Heat Advisory criteria across most of southern New England. Southern New England will lie along the periphery of a very strong upper high pressure ridge with an axis from the Great Plains to the mid-Atlantic states. Monitor any statements/forecasts from the National Weather Service for the high heat expected mid-week.
A relatively robust upper trough will develop over Quebec later this week and bring cooler temperatures for Thursday onward. Pulses of energy rotating about this upper trough may produce a period or two of scattered showers/possible thunderstorms during the coming weekend.
Next Message
Unless there should be a significant increase in risk of severe weather late in the week, the next weather blog will be the significant weather weekly outlook that is scheduled for Monday July 20. Please note: There will be no weather blog messages July 21 – 27 due to the author being on travel.
About this Blog and Disclaimer
The National Weather Service monitors the weather 24/7 and updates forecasts, watches, and warnings as necessary. For most of southern New England, refer to your local Weather Forecast Office for the latest forecast/warning information at weather.gov/box. For information from other Weather Forecast Offices, go to weather.gov and click on the location of interest on the map.
The frequency of this blog will depend upon the nature of the weather threat and availability of the author. Thus, for the latest information on weather forecasts and warnings, refer to the National Weather Service, which monitors and forecasts the weather 24/7.
Blue Hill Observatory and Science Center (BHOSC)
The BHOSC maintains a continuous daily observation record that dates from February 1, 1885 without interruption and provides educational information on weather and climate to area students and the community at large. Your support of BHOSC is much appreciated and enables this nonprofit organization to maintain the long-term climate record at the Blue Hill Observatory (longest continuous record in North America) and provide valuable educational resources on weather and climate via outreach to schools, site visits/tours, webinars, and conferences. For more information on the Blue Hill Observatory and Science Center, explore bluehill.org.
Message issued July 13, 2026 by:
Bob Thompson
Retired National Weather Service Meteorologist
Blue Hill Observatory and Science Center Board member
