华盛顿州至少有四条河流现在处于主要洪水阶段-最高水位-预计未来一两天内其他11条河流将达到相同的水位，因为一条大气河流在太平洋西北部带来暴雨
从华盛顿到俄勒冈持续多日的洪水使得河流水位接近历史最高水平。
据预测，这一事件将给华盛顿部分地区带来高达7英寸的降雨量。
华盛顿喀斯喀特山脉海拔3600英尺的Stampede Pass在周一记录了超过7英寸的降雨量。通常，这将是雪，但由于高于平均水平的气温困扰着西部，到目前为止都是雨。
西雅图-塔科马国际机场降雨量超过1英寸，俄勒冈州波特兰国际机场降雨量超过1.5英寸。
一些河流可能会打破记录。周二晚上，华盛顿纳塞勒附近的纳塞勒河已经从正常的5英尺深涨到近20英尺深，在12小时内增长了10英尺，距离历史记录不到1英尺。
虽然华盛顿在周一受到最严重的打击，但大气河在周二略有南移，并将对俄勒冈州造成最严重的影响。
预计这条大气河流将在周二晚上和周三再次向北撤退，并给华盛顿州带来更多降雨。
周四和周五雨还会继续，但是华盛顿西部和俄勒冈州的雨会小很多。
整个事件的总降雨量在高海拔地区预计将超过1英尺，在一些最低海拔地区将达到3英寸或更多。
中西部冬季风暴
在接下来的几天里，中西部地区将会看到严寒的间歇，直到下一股北极空气在周五前涌入中西部，并在整个周末持续。它将在周日早上到达东北部。
一个强低压系统正在穿越中西部北部，并在周二造成危险的风雪天气。
从蒙大拿州到明尼苏达州再到科罗拉多州，大范围的破坏性风力已经导致至少七个州发出大风警报，预计周二阵风将达到每小时65英里。科罗拉多山区海拔较高的地方，阵风可达每小时90英里。
这可能会移动地面上坚硬的积雪，造成地面暴风雪的情况。
任何在这些地区开车的人都应该非常小心。像semis这样的高顶车在这种情况下可能会翻车。停电也是有可能的。另外，吹雪时能见度会很低。
同时，一些地区也会下雪。
从北达科他州的部分地区到明尼苏达州和威斯康星州的部分地区，可能会有2到7英寸的降雪。
周二下午和夜间，明尼阿波利斯可能会有2到4英寸的降雪，阵风可达每小时35英里。
南达科他州、明尼苏达州南部和爱荷华州中部的部分地区已经发布了冬季风暴警告，因为周二晚上和周三高达60英里/小时的阵风可能会导致暴风雪天气，因为它会刮走地面上的积雪，并堆积少量新雪。
周三，这场风暴将给东北部带来雨雪天气。
Atmospheric river delivers days of heavy rain to Pacific Northwest
At least four rivers in Washington state are now at major flood stage -- the highest level -- and 11 others are forecast to reach the same level in the next day or two as an atmospheric river delivers heavy rain in the Pacific Northwest
The multiday event from Washington to Oregon is swelling rivers to near-record levels.
The event is forecast to bring up to 7 inches of rainfall in parts of Washington.
Stampede Pass, at an elevation of 3,600 feet in Washington's Cascade Mountains, recorded more than 7 inches of rain on Monday. Usually, this would be snow, but due to the well-above-average temperatures plaguing the West, it's been all rain so far.
More than 1 inch of rain has fallen at Seattle–Tacoma International Airport and more than 1.5 inches was recorded at Portland International Airport in Oregon.
Some rivers may break records. Already, overnight into Tuesday, the Naselle River near Naselle, Washington, has gone from its normal 5 foot depth to nearly 20 feet deep, growing by 10 feet in 12 hours and coming within less than 1 foot of the historical record.
While Washington was the hardest hit on Monday, the atmospheric river has shifted slightly south on Tuesday and will hit Oregon the hardest.
The atmospheric river is expected to retreat north again Tuesday night and into Wednesday and deliver more rain to Washington state.
The rain will continue Thursday and Friday, but it will be much lighter for western Washington and Oregon.
Total rainfall accumulation through the event is still expected to reach over a foot of rain at high elevations and 3 inches or more at some of the lowest elevations.
Midwest winter storm
The Midwest will see a break in the brutal cold over the next couple days until the next shot of Arctic air plunges into the Midwest by Friday and digs in through the weekend. It will reach the Northeast by Sunday morning.
A strong low pressure system is moving through the Upper Midwest and creating dangerous wind and snow conditions on Tuesday.
A widespread area of damaging wind has led to high wind warnings across at least seven states from Montana to Minnesota to Colorado where gusts up to 65 mph are generally expected Tuesday. Higher elevations in the mountains of Colorado could have gusts up to 90 mph.
This could dislodge even hardened snow on the ground and create ground blizzard conditions.
Anyone driving in these areas should use extreme caution. High-top vehicles like semis can be overturned in these conditions. Power outages are also possible. Plus, there will be low visibility with any blowing snow.
Meanwhile, some areas will see falling snow, too.
A winter storm warning is in place with 2 to 7 inches of snow possible from parts of North Dakota through parts of Minnesota and Wisconsin.
Minneapolis could see 2 to 4 inches of snow and gusts up to 35 mph Tuesday afternoon and overnight.
A winter storm warning is in place for parts of South Dakota, southern Minnesota and central Iowa because gusts up to 60 mph Tuesday night and Wednesday could lead to blizzard conditions by dislodging snow already on the ground, along with minor new snow accumulations.
On Wednesday, this storm will bring rain and snow to the Northeast.
