Locations: South of Route 2 in northern MA.
Timing: Mixed precipitation.
Amounts: Up to 1 inch of additional snow accumulation, with up to one tenth inch of additional ice accretion. Icing most likely across northern CT, northern RI and southern MA into Metrowest.
Impact: Snow and ice will result in hazardous travel for the evening commute. Untreated surfaces will be slippery.
Confidence: High confidence in mixed precipitation. Moderate confidence in timing for individual precipitation types at any given location.
Locations: North of Route 2 in northern MA.
Timing: Mainly snow, with periods of sleet and freezing rain at times. Rain towards the immediate east coast of MA.
Amounts: 1 to 2 inches of additional snow/sleet. A trace to less than one tenth inch of additional ice accretion, mainly near the Mass Pike and Middlesex County.
Impact:
Snow and ice will result in hazardous travel for the evening commute. Untreated surfaces will be slippery.
Confidence: High confidence in mixed precipitation. Moderate confidence in timing for individual precipitation types at any given location.
Isolated to Scattered Snow Squalls:
Locations: All locations.
Timing: Wednesday afternoon into early evening.
Amounts: A quick coating to half an inch in less than 30 minutes.
Impact: Temporarily reduced visibility could catch drivers off guard, especially for early evening commute. Also, roads could become snow-covered quickly, resulting in slippery travel.
Confidence: Low to moderate. Areal extent of snow squalls will be limited with many locations likely remaining dry. Best chance of snow squalls will be in the interior.
Bitter Cold/Very Low Wind Chills:
Locations: All locations.
Timing: Wednesday night into Thursday morning.
Amounts: Wind chill values -5 to -20°F across the interior, and zero to -5°F across eastern MA and RI.
Impact: Coldest air of the season. Bitter cold wind chills for school bus stops.
Confidence: High. Wind Chill Advisories may be issued with later forecasts.
Potential risk of freezing spray:
Locations: Immediate coastal waters off Eastern MA and RI.
Timing: Wednesday night into early Thursday morning.
Amounts: Light to moderate freezing spray possible.
Impact: Glaze of ice possible on boats and ships traversing the waters.
Confidence: Moderate overall, highest risk across the nearshore waters.