Boston, Massachusetts – Another winter weather system is expected to bring a period of freezing rain late Sunday evening into early Monday morning, creating slick travel conditions in parts of eastern and central Massachusetts.
According to the National Weather Service in Boston/Norton, forecast guidance continues to show the highest confidence for freezing rain accumulation in low-lying areas north of the Massachusetts Turnpike. Ice is expected to develop Sunday night as surface temperatures fall below freezing while rain moves into the region.
Ice accumulation amounts are forecast to range from a light glaze up to around one-tenth to two-tenths of an inch, with the greatest potential across interior northern Massachusetts, including valleys and sheltered locations. Elevated roadways, bridges, and untreated surfaces may become slick quickly during the overnight hours.
Forecasters say the freezing rain threat is expected to transition to plain rain by sunrise Monday, though the exact timing depends on how quickly surface temperatures rise above freezing. Current forecast confidence is described as moderate, with temperature trends being the primary uncertainty.
The timing places the highest impact window during overnight travel and the early Monday morning commute, particularly for drivers traveling north of Boston and across interior routes away from the immediate coast.
In addition to icing concerns, the National Weather Service notes growing concern for strong post-frontal winds on Tuesday, which could follow lingering wet or icy conditions.
Residents are encouraged to use caution during overnight travel, allow extra time for the Monday morning commute, and continue monitoring updates as advisories or warnings may be issued.
