National Weather Service United States Department of Commerce
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Last Map Update: Sat, Oct 10, 2026 at 1:32:58 pm MDT

Widespread heavy rainfall is expected to occur across the entirety of the forecast area starting Saturday afternoon/evening as Tropical Storm Rachel transitions to an extratropical system to our southwest and interacts with a strong midlevel trough. Widespread rainfall amounts from 1-2" are expected across much of the forecast area, with localized amounts potentially reaching 3+" across locations such as higher terrain locations across southwest Utah, the Book Cliffs, and locations within and adjacent to the Bear River Range.
A wind threat is expected to accompany this system as it begins to take on extratropical characteristics. Initially, advisory level winds will begin to develop across most Utah valley locations starting just after midnight tonight, becoming more widespread Saturday afternoon. Advisory level winds are forecast to remain in place through at least Monday afternoon.
A more notable high wind threat looks to develop across the valleys and high terrain of southwest Utah as the remnants of Rachel moves through. This would bring widespread lower elevation winds in excess of 40mph with high terrain and ridgelines seeing gusts potentially exceed 70mph.
The remnants of Tropical Storm Rachel will bring ample tropical moisture across Utah through the holiday weekend. The threat of isolated flash flooding will start as early as Saturday afternoon across southern and central Utah, become widespread and potentially significant across southwest Utah by Sunday as the remnants of the tropical system move through Utah. However by Monday, moisture will remain in place and will support a return to more typical scattered showers and thunderstorms capable of locally heavy rainfall.
The flash flood potential rating for southern Utah parks and recreation areas rises to the highest category of expected (level 4 of 4) by Sunday especially for Zion National Park, Snow Canyon, and the Paria and Escalante River Basins. Consider other recreation plans.

 

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