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 >

Pre-Duty Controller Weather Briefing

The Pre-Duty Controller Weather Briefing is designed to increase controller situational awareness. It is produced by the Center Weather Service Unit three times daily. After hours or during changing weather this briefing may not represent the latest information. This product does not replace pilot pre-flight briefings.

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DC Metro Gate Forecast website here.

.AVIATION /01Z TUESDAY THROUGH SATURDAY/... Significant improvement seen in the past hour at CHO, but some light snow flurries continue for now, resulting in slight VSBY reductions. Low-end VFR to MVFR CIGs are expected at CHO through the first half of the night. As strong high pressure builds in, winds turn light overnight, with VFR conditions expected everywhere else. VFR conditions continue for Tuesday and Wednesday. As high pressure moves off the coast, winds shift to southerly on Tuesday, picking up in intensity during the late afternoon to evening period with gusts to around 15 to 20 knots. Further upticks in wind are expected for Wednesday ahead of a fast moving clipper-like system. Gusts up to 20 to 30 knots are possible before winds shift to westerly late Wednesday behind the associated cold front. VFR conditions are expected on both Thursday and Friday. Winds will be gusty out of the northwest on Thursday, and then lighter out of the west on Friday. AVIATION...ADS/CJL/KJP Update as of: 904 PM EST Mon Dec 8 2025