(Updated at 5 p.m.) Arlington County is under a Winter Weather Advisory for Saturday into Sunday.

The National Weather Service says wintry precipitation starting Saturday morning may lead to slippery roads, with ice accumulation up to a fifth of an inch or so.

An earlier Winter Storm Watch was downgraded to an advisory Friday afternoon.

More from NWS:

310 PM EST Fri Feb 12 2021

…WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 7 AM EST SUNDAY…

* WHAT…Freezing rain, mixed with sleet at times. Storm total ice accumulations of one tenth to two tenths of an inch.

* WHERE…The District of Columbia, and portions of central and southern Maryland and central, northern and northwest Virginia.

* WHEN…From 10 AM Saturday to 7 AM EST Sunday.

* IMPACTS…Prepare for difficult travel conditions.

* ADDITIONAL DETAILS…Even a small amount of ice on untreated surfaces can make travel treacherous.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Slow down and use caution while traveling. Prepare for possible power outages.

When venturing outside, watch your first few steps taken on steps, sidewalks, and driveways, which could be icy and slippery, increasing your risk of a fall and injury.

In a sign of what may be to come, Metro is planning to operate on a moderate snow service plan to start the day on Saturday.

It does not take much ice buildup on roadways to create very dangerous conditions. On Thursday morning, an icy highway in Fort Worth, Texas caused a massive pileup that killed six people and involved more than 100 vehicles.

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