Early November Snow Risk for Western US Mountains
• NOAA's Climate Prediction Center has issued an early-November outlook highlighting elevated snow risks for mountainous regions in the western United States. From November 1-7, heavy snow is possible in two key zones: the Cascade Range, spanning from the Canadian border through Washington, Oregon, and into California's Sierra Nevada, and the Colorado Rockies, including areas near Denver's Front Range. This forecast coincides with a strong El Niño pattern, which is expected to persist through early
• While these regions face potential snow, the northern two-thirds of the U.S. are projected to experience above-average temperatures for November, with drier-than-average conditions in the northern Intermountain West and Northern Plains. Meanwhile, wetter-than-average conditions are anticipated across the southern U.S. and parts of the East Coast.
Impact & Risks
Travelers in the Cascade Range, Sierra Nevada, and Colorado Rockies should prepare for potential snow-related disruptions, including road closures and chain requirements, particularly at higher elevations. Early-season storms could create hazardous driving conditions, especially in mountain passes. The northern Intermountain West, including parts of Montana, Wyoming, and Idaho, is expected to see reduced snowfall due to drier-than-average conditions. Similarly, Great Lakes states may experience delayed lake-effect snow accumulation. Overall, the northern U.S. is likely to have a milder and drier start to November, reducing typical early-winter weather risks in those areas.
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