Idaho Falls, Idaho – Dangerous fire weather will grip much of southeastern Idaho Thursday, with strong winds, low humidity and dry lightning creating conditions for rapid fire growth. The National Weather Service has issued a Red Flag Warning from noon to 10 p.m., affecting the Upper Snake River Valley, Centennial Mountains, Lemhi and Lost River ranges, Caribou Range, and parts of the Southern Sawtooth National Forest.
According to the NWS in Pocatello, southwest winds of 15 to 25 mph—gusting up to 35 mph in some mountain zones—will combine with humidity as low as 13 percent. In southern areas, scattered thunderstorms are expected, producing outflow winds up to 60 mph and lightning capable of sparking new fires.
Fire crews warn that any new ignitions could spread quickly, especially in areas where fuels are already dry. Residents and recreationists are urged to avoid open flames, secure trailer chains, and postpone outdoor equipment use that could cause sparks.
The Red Flag Warning remains in effect until 10 p.m. Thursday, with additional alerts possible if hot, dry, and windy conditions persist into the weekend.
