After a springlike start to the week in Boston, a sharp change to frigid weather will come for Thursday.
A strengthening winter storm initially spread rain across the city on Wednesday which changed over to snow before the end of Wednesday night.
Subfreezing air will quickly freeze up any wet or slushy roadways and sidewalks.
"Car doors and locks may freeze up as the frigid weather moves in," said Senior Meteorologist Dave Dombek.
Several inches of snow will pile up on top of the icy freeze-up through Thursday afternoon. The ice and snow will lead to slow travel on roadways and flight delays on Thursday.
AccuWeather RealFeel® temperatures will be in the single digits throughout the day Thursday with occasional snow.
"The next few days will be like a winter sandwich," said AccuWeather.com Chief Meteorologist Elliot Abrams.
A frigid Thursday will be saddled between a pair relatively mild days. Highs will be near 40 degrees on Friday before approaching 50 degrees by Saturday.
The potential for locally dangerous and disruptive thunderstorms will exist over the Midwest into Wednesday evening.
Areas from Central America to southeastern Mexico, western Cuba and southern Florida will be on alert into next week as a tropical system may form.
Warmth will build and evolve into a heat wave across a significant part of the western United States this week.
Rounds of heavy thunderstorms will raise the risk of flooding across the south-central United States into Friday.
Temperatures and humidity levels will throttle back as dry air expands southward in the northeastern United States through the middle of the week.
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