Significant Weather Outlook: Monday, April 27, 2026 9 AM

Significant Weather Weekly Outlook

Hazardous weather does not appear likely this week across southern New England.

A ridge of high pressure both surface and aloft sets the stage for dry weather across southern New England for the first part of this week.  Weak pressure gradients and associated light winds will allow the formation of afternoon sea breezes along the coast and cooler high temperatures there (low to mid 50s) for the first half of this week.  Well inland, afternoon temperatures should reach into the 60s to around 70 both Monday and Tuesday under sunny skies.  Dry air (low dewpoints) and light winds will favor robust radiational cooling with temperatures dropping back into the 30s and lower 40s for most of the region at night.

The first widespread significant rain in quite a while looks likely for Thursday as an occluded front and possible weak low pressure along the front moves through.  The potential exists for a half to an inch of rainfall across southern New England on Thursday.

A broad upper trough may keep the weather somewhat unsettled into the weekend with the potential for scattered showers.  The latest operational runs for the GFS and UKMET models depict a fairly robust rainy nor’easter for Sunday, but neither the ECMWF nor Canadian models show this.  Temperatures will likely run cooler than average for this time of year during the upcoming weekend.

Next Message

The next message is expected to be the significant weather weekly outlook scheduled for Monday May 4.

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 April 27, 2026 by:
Bob Thompson
Retired National Weather Service Meteorologist
Blue Hill Observatory and Science Center Board member