Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

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Last Map Update: Tue, Dec 9, 2025 at 7:28:38 am AST

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National Weather Service Miami - South Florida

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[December 9th] Bring your umbrella to work! Shower interruptions across eastern Puerto Rico and the U.S. Virgin Islands will continue through the morning, while afternoon showers across northwestern Puerto Rico will increase ponding of water in roads and poorly drained areas. [9 de diciembre] ¡Lleve su sombrilla al trabajo! Aguaceros intermitentes en el este de Puerto Rico y las Islas Vírgenes Estadounidenses continuarán durante la mañana, mientras que aguaceros en la tarde en la zona noroeste de Puerto Rico aumentará acumulacion de agua en carreteras y áreas de pobre drenaje. #prwx #usviwx

Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

NWS San Juan, PR