Significant Weather Outlook: Monday, December 8, 2025 10 AM
Significant Weather Outlook for the Coming Week
There is no identifiable significant weather threat foreseeable at this time for this first week in December.
The large-scale weather pattern features fairly zonal west to east flow with a broad large-scale upper trough anchored over eastern North America. Several pulses of energy embedded in that upper flow with clipper low pressure centers at the surface may bring light precipitation episodes to New England over the coming week to ten days.
The various computer models (both operational and ensemble runs) are consistent with a fast-moving clipper low pressure system moving across far northern New England on Wednesday. This will most likely result in scattered light rain or snow showers for southern New England and perhaps several inches of snow across the mountains of northern New England.
After Wednesday, the operational and ensemble model runs lack consistency from run to run and among the various models. Although the overall theme looks to be fast moving clipper systems passing north of southern New England, confidence in precipitation outcomes is low. One such clipper system may pass across northern New England sometime this weekend, although there’s considerable uncertainty in timing and track. If one of these energy pulses should evolve into a deeper and sharper transient trough (i.e., more amplified “short wave” trough), then we might witness a surface clipper low pressure system passing south of New England with the potential for moderate snowfall across much of southern New England. Although not out of the realm of possibility, this does not appear likely at this time.
Temperatures are likely to average below normal this week. There will be a modest warming in temperatures on Wednesday as winds turn southerly with the clipper system passing to our north followed by another influx of arctic air on Thursday accompanied by brisk northwest winds.
Will continue to monitor weather developments for southern New England this week and begin message blogs should conditions become more favorable for a significant winter storm. Will plan to issue another weekly outlook next Monday December 15.
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.
A blog is issued when there is a potential risk of hazardous weather to southern New England and serves to provide background information regarding the significant weather with somewhat of an educational slant. In the case of hurricanes, the author will attempt to issue a message when any portion of the United States coastline may be seriously impacted. It’s intended to complement and not serve as an alternative to official forecasts issued by the National Weather Service. Readers are urged to check National Weather Service forecasts and warnings for the most timely and updated weather information. This weather message is solely produced by the listed author and does not constitute an official product of the Blue Hill Observatory and Science Center (BHOSC).
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 December 8, 2025 by:
Bob Thompson
Retired National Weather Service Meteorologist
Blue Hill Observatory and Science Center Board member
