UPDATED: Jan. 21, 2015 9:46 p.m.

LANHAM, Md. (WNEW) — The National Weather Service has extended a Winter Weather Advisory until 8 a.m. Thursday for most of the D.C. and Baltimore metro areas due to freezing drizzle and scattered snow showers.

NWS is warning drivers that periods of freezing drizzle and freezing fog will cause slippery road conditions and limited visibility Wednesday night.

Temperatures will drop below freezing across parts of D.C., Maryland and Virginia. Icy spots are expected, according to the NWS.

A period of light snow may impact roadways late Wednesday night into early Thursday morning, officials say.

Queen Annes’ Co. Public Schools announced it is opening 90 minutes late Thursday and will not have morning Pre-K.

The National Weather Service issued a Winter Weather Advisory from 6 a.m. to 6 p.m. Wednesday for parts of Maryland, D.C. and Virginia. It expired around 5 p.m.

The Maryland State Highway Administration (SHA) says crews are continuing storm response activities.

WUSA-9 meteorologist Topper Shutt says he is concerned with re-freezing during the evening commute and overnight. He advises motorists to be aware of black ice and some slick spots.

One to three inches of snow was predicted to fall in northern Virginia, D.C. and areas in Maryland including Frederick, Carroll and Prince George’s County on Wednesday.

“For the third consecutive week, forecasters call for precipitation during a weekday commute and we cannot stress enough that a difference of only one or two degrees is the difference between wet roads and treacherous slippery roads,” said MDSHA Administrator Melinda B. Peters.

Loudoun County Public Schools closed for the day.

Baltimore County and Carroll County Public Schools closed one hour early. Anne Arundel County Public Schools closed two hours early. All have canceled evening activities.

Alexandria City, Baltimore City, Fairfax, Frederick, Montgomery, Prince George’s and Prince William County Public Schools have canceled all afternoon and evening activities.

Arlington County Public Schools have canceled all after-school activities. Evening activities held as scheduled.

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