Manchester, New Hampshire – St. Patrick’s Day celebrations across New Hampshire could arrive with a blast of lingering winter as colder air descending from Canada raises the potential for late-season snow during the week leading into the first day of spring.
According to the NOAA Climate Prediction Center’s 8–14 day outlook, the period from March 15 through March 21 shows above-normal precipitation probabilities across New England, while temperatures across much of the Northeast trend below seasonal averages. The setup forms as a broad cold front stretches from Maine across the Great Lakes and south toward Georgia and parts of Florida, allowing colder Canadian air to spill across the eastern United States.
That combination could place Manchester, Concord, Nashua, and Laconia in a zone where colder air and incoming storm systems overlap, creating the potential for late-season snow or mixed precipitation during St. Patrick’s Day week. Even a modest coastal system could bring accumulating snow if colder air holds across the region.
Drivers along Interstate 93, Interstate 89, and the Everett Turnpike should watch for changing conditions if storms develop during the period. Late-season snow can quickly reduce visibility and produce slick travel during early morning and evening commutes.
The timing is notable as daylight saving time begins this weekend, yet winterlike conditions may linger across the Northeast even as the first day of spring arrives later that week.
Forecasters expect additional updates as the mid-March pattern becomes clearer, and new advisories could be issued if storm tracks begin to align with the colder air mass.
