A White Christmas is a guarantee in the Rockies and near the Great Lakes, but hopes for snow in the central and eastern U.S. will hinge on a storm moving through just before the holidays.

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More heavy rain is expected through late week as saturated ground and swollen rivers raise the threat of widespread flooding.

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As the weather flips from cold to warm and back this week, a storm may hinder early Christmas travel in the eastern United States with areas of rain, fog, ice and perhaps more snow. Experts with AAA say car travel will dominate through New Year’s, driven by lower gas prices compared to last holiday season. For the first time in four years, the national average price per gallon dropped below $3 just in time for peak Christmas travel.

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Following a very wet pattern last week, AccuWeather forecasters warn that additional rain is on the way for the Northwest this week that will heighten the risk for widespread flooding.

Also, the dramatically cold weather and dangerous conditions gripping the Central and Eastern states will ease up this upcoming week. How long will the reprieve last, and will it hurt chances for a white Christmas?

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Under perfect conditions, up to 120 meteors per hour could shoot across the night sky this Saturday and Sunday when the Geminids reach their peak.

Also, veterinarian Dr. Jennifer Coates writes for The Spruce Pets that not all dogs need winter jackets, but many do. Dogs that benefit the most include small breeds, puppies, senior dogs, and pets with health conditions. Short-haired breeds or any dog in the miniature category may also need an extra layer when temperatures drop.

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For the second time in two years, one of the driest places on Earth has a lake following the wettest November since record-keeping began in 1911.

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While the Rockies are behind, parts of the Midwest and New England are seeing a blockbuster snow season.

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Chicago, Detroit, Des Moines, Iowa, and even Richmond, Virginia, have picked up accumulating snow so far this year--but when will it be New York City's, Philadelphia's and Boston's turn? The clock may be ticking down.

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A pair of atmospheric rivers will unleash many inches of rain and trigger major flooding in parts of western Washington and Oregon through the middle of this week. More storms will follow past the middle of December.

Also, more Arctic air is building over northern Canada and will be directed into the United States, courtesy of the polar vortex. How long will the cold waves last? Will it stay cold through Christmas?

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Successive storms early this week and beyond will trigger flooding, landslides and high winds in the mountains, with impacts that may cascade into regional air and highway travel through the busy holiday period.

More Arctic air is building over northern Canada and will be directed into the United States, courtesy of the polar vortex. How long will the cold waves last? Will it stay cold through Christmas?

AccuWeather RealFeel® Temperatures plunged to 73 below zero atop New Hampshire’s tallest mountain Thursday night as a storm roared through the Northeast.

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