'Extreme' atmospheric river triggers avalanche warnings
CNN
An "extreme" atmospheric river arrived in the Pacific Northwest Sunday night and will bring hazards such as avalanches and flooding through the early part of the week.
"A slow moving low pressure spinning over the north Pacific will result in an atmospheric river (a narrow ribbon of enhanced moisture transport) slowly shifting across the PacNW," the National Weather Service (NWS) office in Portland tweeted. "This will produce periods of moderate to heavy rain to begin the workweek."
Flood watches are in place for over five million people across Idaho, Oregon and Washington, including Seattle.
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