Massachusetts faces renewed snow and freezing rain Tuesday, with evening commute expected to turn hazardous

Wintry mix forecast to spread across the state late Tuesday

A fast-moving weather system is expected to bring a period of snow, sleet and freezing rain to Massachusetts on Tuesday, March 3, raising the risk of icy roads and difficult travel, particularly during the evening commute. Forecast maps indicate the highest concern will be in areas where surface temperatures hover near or below freezing while warmer air moves in aloft, creating conditions favorable for ice accumulation.

The setup follows a sharp early-week cold spell that left much of New England well below typical early-March temperatures. That cold air near the ground increases the likelihood that precipitation arriving later Tuesday will freeze on contact in inland locations, even as temperatures begin trending upward.

Timing and impacts: roads may deteriorate quickly after snow begins

Forecast guidance points to precipitation reaching southern New England Tuesday afternoon or evening, beginning as snow in many communities before transitioning to a mix that may include sleet and freezing rain. Even when total precipitation is not heavy, a thin glaze of ice can significantly reduce traction on untreated roads, sidewalks, bridges and overpasses.

Conditions are expected to improve as the system pushes east and temperatures rise, with precipitation changing to plain rain in many areas later Tuesday night into Wednesday. The transition line, however, may fluctuate by tens of miles, affecting which communities see mainly snow versus a prolonged icy mix.

• Greatest travel risk: late Tuesday afternoon through Tuesday night, when freezing rain or sleet is most likely in colder inland areas.
• Most vulnerable surfaces: elevated roadways, ramps, overpasses and secondary streets that cool faster than main routes.
• Potential disruptions: slower commutes, scattered school schedule changes Wednesday morning, and localized issues where ice persists longest.

What to watch: small temperature shifts can change precipitation type

Forecasters are closely monitoring the near-surface temperature profile. When the ground layer remains below 32°F while a warmer layer moves in above it, raindrops can become supercooled and freeze on contact. In a slightly different profile, sleet can dominate instead, reducing ice glazing but still creating slippery travel.

Around-freezing surface temperatures are often the determining factor for whether a storm produces mainly wet roads or a widespread sheet of ice.

Preparedness: transportation agencies urge caution during icy periods

State transportation resources typically prioritize interstates and major routes, but travel conditions can vary block to block during mixed-precipitation events. Drivers are advised to allow extra time, reduce speed, and increase following distance. Pedestrians should also anticipate slick sidewalks and refreezing where temperatures remain near freezing after precipitation ends.

The system is expected to be followed by a broader warming trend later this week, which would reduce the risk of lingering ice but may contribute to slush and runoff where snow accumulates before changing over to rain.