Fluffy wet flakes are falling in the Merrimack Valley Tuesday morning., causing forecasters to warning morning commuters to be careful of slippery roads.

"Some roads will be snow covered/slippery for a time this morning, even in the lower elevations across northeast MA," forecasters with the National Weather Service tweeted. "Bulk of the snow accumulations occur this morning, so drive with extra caution."

The areas around Boston will see mostly rain, with little snow accumulation if it does switch over, according to forecasters.

Areas further inland and north of Boston are experiencing some accumulation Tuesday morning, but not much snow is expected. In the Merrimack Valley, traffic was moving normally as of 9 a.m., as snow began to accumulate on the ground.

Andover, North Andover, Haverhill, Methuen and Lawrence public schools are open with no delays.

A winter weather advisory is in effect across New Hampshire until 5 p.m., Tuesday, where Londonderry, Hampstead and Pelham public schools are closed. Windham and Derry public schools remain open.

Forecasters expect about three to five inches of accumulation across Rockingham County and New Hampshire.

Looking ahead to Thanksgiving, forecasters warn that temperatures will plunge into the teens on Wednesday night into Thursday morning, making for what could be one of the coldest Thanksgiving holidays on record.

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