平安夜早上，从弗吉尼亚州到缅因州的九个州都处于降雪警报中，因为一股降雪穿过东北部，带来了危险的驾驶条件。
白色圣诞节?
如果圣诞节早上7点地面上有1英寸或更多的雪，国家气象局认为这是一个白色圣诞节。
纽约市可能会迎来15年来的第一个白色圣诞节。平安夜中央公园早上下了一英寸厚的雪，但是还不清楚圣诞节前雪是否会融化。
其他有机会过白色圣诞节的城市有:明尼阿波利斯;威斯康星州格林湾;波士顿;纽约布法罗;还有佛蒙特州的伯灵顿。
平安夜天气预报
在平安夜早晨，最大的雪袭击了纽约州北部和新英格兰北部，当地积雪可能超过1英尺。
周二早上，从华盛顿特区到波士顿的95号州际公路走廊可能会有1英寸厚的积雪。
由于冰面和潜在的积雪的危险结合，DC和费城发布了冬季天气预报。
到周二下午，雪将结束，太阳将从东北方出来，迎来干燥的平安夜之夜和圣诞节的早晨。
与此同时，太平洋上一个强大的风暴系统产生极端的波浪每隔几年才能在西海岸看到。
在加利福尼亚北部和俄勒冈州南部，海浪可能达到60英尺，在加利福尼亚南部，海浪可能达到25英尺。
这场风暴给包括旧金山湾区在内的北加州带来了狂风、暴雨和雷暴。
一些雨水可能会在晚上到达南加州，包括洛杉矶。
圣诞节天气预报
圣诞节当天，纽约市的气温将达到35度，芝加哥为39度，北卡罗来纳州的罗利为53度，田纳西州的孟菲斯为59度。
气温将略有下降低于正常值东北部和中西部略高于正常水平。
从得克萨斯州到密西西比州到田纳西州，天气预报显示圣诞节将有阵雨和雷雨。
从新墨西哥州的陶斯到蒙大拿州的大天空，洛矶山脉海拔较高的地方预计会有6到12英寸的降雪。
俄勒冈州和华盛顿州将会是一个多雨的圣诞节下午，喀斯喀特山脉会有雪。
White Christmas forecast: Where snow, ice is expected
Nine states from Virginia to Maine are under snow alerts on Christmas Eve morning as a band of snow moves through the Northeast, bringing treacherous driving conditions.
A white Christmas?
The National Weather Service considers it a white Christmas if there's 1 inch or more of snow on the ground at 7 a.m. on Christmas morning.
New York City could see its first white Christmas in 15 years. One inch of snow fell in Central Park on Christmas Eve morning, but it’s not clear if it’ll melt before Christmas Day.
Other cities that have a good chance for a white Christmas are: Minneapolis; Green Bay, Wisconsin; Boston; Buffalo, New York; and Burlington, Vermont.
Christmas Eve forecast
On Christmas Eve morning, the heaviest snow is hitting upstate New York and northern New England where locally more than 1 foot of snow is possible.
A coating to 1 inch of snow is possible along Interstate 95 corridor from Washington, D.C., to Boston on Tuesday morning.
A winter weather advisory has been issued for DC and Philadelphia due to the dangerous combination of a glaze of ice with a potential coating of snow.
By Tuesday afternoon, the snow will end and the sun will come out in the Northeast, ushering in a dry Christmas Eve night and Christmas Day morning.
Meanwhile, a powerful storm system in the Pacific Ocean isproducing extreme wavesthat are only seen every few years on the West Coast.
Waves could reach 60 feet in Northern California and southern Oregon and could reach 25 feet in Southern California on Tuesday morning.
This storm is bringing gusty winds, heavy rain and thunderstorms with lightning to Northern California, including the San Francisco Bay area.
Some of the rain could reach Southern California, including Los Angeles, by the evening.
Christmas Day forecast
On Christmas Day, temperatures will reach 35 degrees in New York City, 39 degrees in Chicago, 53 in Raleigh, North Carolina, and 59 in Memphis, Tennessee.
Temperatures will be slightlybelow normalin the Northeast and slightly above normal in the Midwest.
Showers and thunderstorms are in the forecast for Christmas Day from Texas to Mississippi to Tennessee.
Six to 12 inches of snow is forecast for the higher elevations in the Rocky Mountains, from Taos, New Mexico, to Big Sky, Montana.
It'll be a rainy Christmas afternoon in Oregon and Washington, with snow in the Cascade mountain range.
