Weather woes leave many holiday travel plans up in the air

Updated 9:43 PM EST, Fri February 14, 2014

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NEW: More than 160,000 customers are still without power

NEW: Some 1,700 flights within, into or out of the United States are canceled Friday

New storm system is predicted to drop more snow on Northeast after leaving Midwest

At least 21 people have been killed in weather-related incidents, authorities said

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(CNN) —  

A long weekend bookended by two holidays – Valentine’s Day and Presidents Day – would typically be a big one for travelers – two reasons to take a break from routine and see a bit of the world.

But even before the weekend officially began, many were seeing little more than the inside of airport terminals.