UPDATED 9:44 a.m. Saturday: 

The National Weather Service Spokane office has updated its flash flood warning from 2 p.m. Saturday to 2 a.m. Sunday. 

NCW — Chelan, Okanogan and Ferry counties are under a flash flood alert through Saturday evening.

Slow-moving thunderstorms will pass through the region and could dump heavy rain, according to the Spokane National Weather Service.

If heavy rains do occur, there is a risk of flash flooding and mudslides in areas with recent burn scars or other steep terrain. The alert will be over at 11 p.m. Saturday.

In particular residents around the recently burning Williams Flats fire near Keller should be on alert, according to the news release.

The U.S. Forest Service’s burned area assessment after the Cougar Creek Fire in October 2018, did say there was some risk of flooding from large weather events.

Residents of Ardenvoir at that time were told to keep an eye out for thunderstorms.

Tony Buhr: 664-7123

buhr@wenatcheeworld.com or

on Twitter @TonyBuhr

Environment, county and health reporter

Tony Buhr has been a professional reporter for almost seven years. He worked for the Walla Walla Union-Bulletin as a cops and courts reporter. The Ellensburg Daily Records as a cops and courts, breaking news, agriculture and water reporter.