The U.S. National Weather Service in Boise, Idaho, reports ongoing fog and low stratus across the Snake Plain, Weiser Basin, Baker Valley, and surrounding areas. A Dense Fog Advisory has been issued for the western Magic Valley through Monday morning. Cameras show dense fog in locations including Jerome and La Grande, with additional monitoring covering Union, Baker City, Weiser, Payette, Vale, Nyssa, Caldwell, Boise, Kuna, Emmett, Mountain Home, Glenns Ferry, Shoshone, Jerome, Twin Falls, Burley, Ketchum, Hailey, Idaho City, Council, McCall, and Caldwell. The advisory was created at 4:33 PM MT on January 18, 2026.

Caldwell

3833 S Development Ave, # 3807, Boise, ID

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Boise NWS Forecasts Light Rain, Mountain Snow in Idaho

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Treasure Valley Fog Lifts as Dry Day Dawns

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Caldwell YMCA Aquatic Center Reopens Lap Pool

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Light Snow, Freezing Rain Arrives in Idaho, Oregon

Cold front brings light snow, brief freezing rain, and travel caution.