National Weather Service United States Department of Commerce

Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Latest Aviation Forecast Discussion
.AVIATION /07Z MONDAY THROUGH FRIDAY/...
Through 06Z Tuesday...VFR/light winds to undergo transition
after 12Z with approach/passage of a cold front later this
afternoon/evening. Ahead of the boundary, winds trend
south/southwesterly and gusty into the 20-35 kt range today,
highest at KMSS. Some southwesterly LLWS to 40 kt also likely 
at KSLK/KMSS this morning in advance of the gustier flow 
arriving at the surface. Rain showers, with visibility 
restrictions generally in the 3-6sm range to affect all 
terminals in the 19-02Z time frame west to east as the front 
swings through, after which winds veer to west/southwesterly and
abate slightly with cigs generally trending toward MVFR. 

Outlook...

Tuesday: VFR. Chance RA.
Tuesday Night: VFR. NO SIG WX.
Wednesday: Mainly VFR, with local MVFR possible. Likely RA.
Wednesday Night: Mainly MVFR, with local IFR possible. Definite
RA, Chance FZRA, Slight chance SN.
Thursday: VFR/MVFR conditions possible. Chance RA, Chance SN.
Thursday Night: VFR. NO SIG WX.
Friday: VFR. Chance RA.

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4-hr TCF

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SPC Day 1 Convective Outlook

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06-09 hr Visibility AIRMETs

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9-12 hr Visibility AIRMETs