Project Blue Book Case #34. On July 4, 1947 — just ten days after Kenneth Arnold's landmark sighting near Mount Rainier — witnesses in Emmett, Idaho, reported disc-shaped objects in the sky above this small community in the Boise River valley. The Independence Day sighting was part of the explosive wave of reports that swept the Pacific Northwest and the entire nation in the weeks following Arnold's encounter.
July 4, 1947, was arguably the single most active day of the entire 1947 wave. Hundreds of reports poured in from across the United States, with particularly heavy concentrations in the Pacific Northwest. The national holiday meant millions of Americans were outdoors, looking up at the sky for fireworks — and many of them saw things they couldn't explain.
Emmett sits approximately 30 miles northwest of Boise in a broad agricultural valley. The clear summer skies and the community's elevated vantage point along the Payette River provided excellent observation conditions. The witnesses described objects consistent with the disc-shaped craft being reported across the region.
As Case #34, the Emmett sighting was among the very first cases in what would become the Blue Book archive. The nascent Air Force intelligence apparatus was scrambling to assess the flood of reports, and the investigation protocols that would eventually be standardized under Project Sign were still being improvised.
The Emmett objects could not be identified as conventional aircraft, weather phenomena, or any other known source. The case was classified "Unknown" — one of the founding entries in America's official record of unidentified aerial phenomena.