…The National Weather Service issued red flag warnings from 2 p.m. to 11 p.m. July 29 due to thunderstorms producing abundant lightning and wind gusts up to 50-60 mph, in combination with dry fuels, the alert said. A red flag warning means that critical fire weather conditions are either occurring now, or will occur shortly. NWS also issued a fire weather advisory from 2 p.m. to 11 p.m. July 29 due to potential lightning from thunderstorms that could spark new fires and wind gusts that could impact new and existing fires. …The Piper Fire sparked on July 28 from thunderstorms 3 miles northeast of Skookum Creek Campground in the Three Sisters Wilderness. It was estimated to be 20 acres as of July 28. …The High Horn Fire in Malheur County had burned 120 acres as of July 28. …The Skyline Fire, also burning in Malheur County, had burned 38.5 acres as of July 28.