May 27, 2019
Across Johnson County, two to four inches of rain fell from May 27th through May 28th. This caused rapid rises of creeks and streams as well as the Middle Fork of the Powder River. The river gauge at 10 miles upstream of Kaycee peaked at 10.3 feet, which is 2.3 feet above flood stage. In Kaycee, minor flooding occurred, especially around the fairgrounds but no damage was reported. Moderate flooding also occurred downstream of Barnum, but no damage was reported.
Source: NOAA National Weather Service Storm Events Database (event 822494). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Johnson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.