The National Weather Service office in Pocatello issued a flood watch for eastern Idaho on Saturday afternoon. The alert remains in effect until 6:00 p.m. MDT on Monday, October 12.
Meteorologists warn that excessive rainfall could trigger flooding across rivers, creeks, and low-lying areas. An upper-level low pressure system moving into the Pacific Northwest is merging with tropical moisture from Tropical Cyclone Rachel. This combination is driving a cooler, wetter weather pattern into the region.
Rainfall totals are expected to reach one to two inches across much of the area. Higher terrain in the eastern highlands may see localized accumulations up to three inches. The resulting runoff poses a risk to flood-prone locations throughout the watch zone.
The alert covers a broad swath of southeastern Idaho, including the Lower Snake River Plain, Eastern Magic Valley, and Shoshone/Lava Beds. Other affected regions include the Blackfoot Mountains, Bear Lake Valley, and the Franklin/Eastern Oneida Region. Residents in these areas are advised to monitor updated forecasts and remain alert for potential flood warnings.