The 534-Day Flood at Site 06472000 on the James River, SD

This visualization is highlighting Streamgage 06472000 on the James River near Stratford, South Dakota, which was flooding continuously for 534 days! It started flooding on April 10, of 2019 and finally stopped on September 30, 2020. While the volume of water was not significant compared to other floods, the duration of the flood was uncommon. The viz shows this 534-day flood in context with floods at gages in similarly sized watersheds over the last 20 years. Each band on the chart represents a different gage. The width of each band through time represents the longest flood for that year. You can see that no other band comes close to the width of the dark blue band, which represents streamgage 06472000. This streamgage did experience long floods in 2009, 2010, and 2011 (the wide dark blue section in the middle of the figure) but those floods did not exceed 300 days.