NWS Climate Prediction Center

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@NWSCPC

Official X account for the National Weather Service Climate Prediction Center. Details: weather.gov/nws_x

College Park, MD cpc.ncep.noaa.gov Joined June 2012

380 Following 68K Followers 6.2K Posts

Latest posts 5

NWS Climate Prediction Center @NWSCPC 1d

Potential atmospheric river activity could impact parts of the West Coast including heavy rain, high elevation snow, and high winds. Plain text version of the infographic at cpc.ncep.noaa.gov/cpc_key_messag…

Potential atmospheric river activity could bring enhanced moisture to much of the West Coast during mid-November. Strong surface low pressure just north of the region could also likely drive high winds along the immediate coastline. A fair amount of uncertainty continues regarding the exact timing and magnitude of rainfall and winds. Moderate risk (40 to 60%) of heavy precipitation shown for Nov 14 to 15 across parts of southwestern OR and northern/central CA, while a slight risk (20 to 40%) extends to Nov 17 across the West Coast into the Southwest, Great Basin, and Southern Rockies. A moderate risk of high winds shown for the immediate West Coast Nov 14 to 15 and broader slight risk across the West until Nov 17. Moderate risk of heavy snow for higher elevations of the Klamath and Sierra Nevada Nov 14 to 15. Slight risks of heavy snow to Nov 17 for high elevations of the Cascades, Klamath, and Sierra Nevada, Northern Intermountain, Great Basin, and Central and Northern Rockies.

NWS Climate Prediction Center @NWSCPC 2d

Potential atmospheric river activity could bring enhanced moisture to much of the West Coast during mid-November. There is increased uncertainty regarding the potential for heavy precipitation. Strong surface low pressure north of the region will also likely drive high winds along the immediate coastline. Moderate risk (40 to 60%) of heavy precipitation shown for Nov 13 to 15 across parts of the Pacific Northwest and northern/central California, with slight risk (20 to 40%) extends to Nov 17 across the West Coast into the Desert Southwest, Great Basin, and Southern Rockies. High winds are possible across much of the West, including a moderate risk along the immediate West Coast Nov 13 to 15 and broader slight risk to Nov 17. Moderate risk of heavy snow across the higher elevations of the Klamath and Sierra Nevada Nov 13 to 15. Slight risks of heavy snow extend to Nov 17 for these areas as well as the Northern Intermountain, Great Basin, and Central and Northern Rockies.

NWS Climate Prediction Center @NWSCPC 5d

Atmospheric River Expected to Affect the West Coast states

Heavy Precipitation, High Wind, and Flooding risks for the western United States, valid November 10-16. There is a high risk (over 60 percent) of heavy precipitation across the West Coast states from northern California through the Northwest November 10-12, accompanied by the potential for flooding in lower elevations. A moderate risk (40 to 60 percent) extends through November 14 and includes central California. A moderate risk (40 to 60 percent) of high winds extends along coastal portions of the West Coast November 10-14. Slight risks of heavy precipitation and high winds cover large parts of the West through November 16. Heavy Snowfall risks for the western United States, valid November 10-16. A high risk (over 60 percent) of heavy snow is indicated across the Washington Cascades 10-12, with a moderate risk (40 to 60 percent) extending farther south to include the southern Cascades, Klamath, and Sierra Nevada ranges through November 14. A slight risk continues through November 16

NWS Climate Prediction Center @NWSCPC Oct 26

Periods of heavy precipitation and high elevation snow are possible across parts of Northern California and the Pacific Northwest next week due to an approaching mid-level low pressure system. Coastal high winds and localized flooding are also possible within the risk areas.

The Climate Prediction Center 8-14 Day Hazards Outlook released October 26, 2026 for the period of November 3 to 9, 2026 indicates a moderate risk (40 to 60 percent chance) of heavy precipitation for portions of southwestern Oregon and northwestern California November 6 to 8, and a moderate risk of heavy snow for portions of the northern Sierra Nevada and southern Cascades Nov 6 to 8. Slight risk (20 to 40 percent chance) of heavy precipitation is posted for portions of the Pacific Northwest and Northern California Nov 5 to 9, along with slight risks of heavy snow for the Cascades, Klamath and northern Sierra Nevada ranges Nov 5 to 9.

NWS Climate Prediction Center @NWSCPC Oct 22

Much of the U.S. is leaning toward a wet end to October into the beginning of November! Above-normal precipitation is broadly favored, with the strongest probabilities focused over parts of coastal southern California and the Southwest, and lower chances elsewhere.

The 8 to 14 Day Precipitation Outlook Issued October 22, 2026 valid October 30 to November 5, 2026 depicts broad chances of above-normal precipitation over much of the U.S. 60 to 70 percent chances of above-normal precipitation are indicated over coastal southern California, southeastern Arizona, southern New Mexico, and southwestern Texas. 50 to 60 percent chances of above-normal precipitation cover much of California, stretching through the southern half of Nevada and Utah, into Oklahoma and most of Texas. Broader 40 to 50 percent chances and 33 to 40 percent chances of above-normal precipitation cover much of the U.S., with the exception of Washington, northern Idaho, Montana, North Dakota, northern Minnesota, and New England, where near-normal precipitation is favored.