Significant Weather Outlook: Monday, April 20, 2026 12 PM

Significant Weather Weekly Outlook

Hazardous weather does not appear likely this week.

Cold pool of air associated with an upper trough and radiational cooling enhanced by clear skies and light winds will result in unseasonably cold temperatures tonight dropping into the 20s away from the coast.

The rest of the week should see some moderation in temperatures but likely remaining near or a little below average given what looks to be a persistent upper trough over the Canadian Maritimes.  This is despite an upper-level ridge of high pressure that will likely bring warm temperatures to much of the Midwest and Ohio Valley.  There may be one or two opportunities for some showers, but no heavy rain appears likely at this time for the rest of this week into next weekend.

Next Message

The next message will likely be the significant weather weekly outlook scheduled for Monday April 27.

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 20, 2026 by:
Bob Thompson
Retired National Weather Service Meteorologist
Blue Hill Observatory and Science Center Board member