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Volatile weather in Eastern Idaho

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2026-10-21 11:42 UTC → 2026-10-22 11:31 UTC · added ~~removed~~

Eastern Idaho has experienced a period of highly variable and volatile weather conditions. In early October, the region faced a flood watch and the potential for a hard freeze due to an upper low moving into the Pacific Northwest combined with moisture from Tropical Cyclone Rachel. This pattern brought expected rainfall of 1 to 3 inches in some areas, leading to risks of flooding in rivers and low-lying areas, alongside a significant temperature drop. By late October, the weather pattern continued to shift. Forecasts indicated a transition from light showers and mild afternoon temperatures to widespread rain. A low-pressure system moving south subsequently caused temperatures to drop sharply, with a wintry mix of precipitation, wind, and light snow expected in the Central Mountains and Eastern Highlands. As of late October, a low-pressure system approaching from the south is expected to bring thunderstorms and scattered rain starting Thursday afternoon. As the storm intensifies into Friday, temperatures are projected to drop significantly, bringing a rain and snow mix to higher elevations and gusty winds reaching up to 30 mph. A flash flood watch has been issued for the Big Rock and Ohio burn scars from Thursday evening through Friday afternoon, as heavy rainfall could trigger flash flooding and debris flows. Following the storm, conditions are expected to clear by Saturday, leading to sunny but cold weather with highs in the upper 40s to lower 50s.

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