An unexpected cold front from the Gulf of Alaska has brought rare August snowfall to California and parts of the Pacific Northwest, disrupting summer activities. Notable snowfall was reported in the Sierra Nevada, including Mammoth Mountain and Tioga Pass, which experienced its first August snow since 2003. The National Weather Service warned of slick roads and winter-like conditions for hikers and campers, urging them to prepare accordingly. Record low temperatures were also reported, such as a high of just 57 degrees Fahrenheit at Reno-Tahoe Airport, breaking a 103-year-old record. Additionally, the weather led to the closure of part of Highway 89 through Lassen Volcanic National Park and delayed arrivals at the Burning Man festival due to rain. Local officials and residents expressed surprise and delight at the unusual winter scenery during what is typically a warm summer month.