CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The source[1] fixes the day and tracks the storm across the afternoon: "On the afternoon of April 14, 1935 ... It hit Beaver, Oklahoma, around 4 p.m.; Boise City around 5:15; and Amarillo, Texas, at 7:20." The pin is all-day because the storm crossed several states over one afternoon.A dust storm swept the Oklahoma and Texas panhandles on the afternoon of 14 April 1935, displacing an estimated 300,000 tons of topsoil. It reached Beaver around 4 p.m., Boise City at 5:15 and Amarillo at 7:20.
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