Minor flooding occurred along the Cheyenne River from upstream of Wasta to Lake Oahe due to releases from Angostura Dam, snowmelt, and ice jams. On March 15, releases began from Angostura Dam through the radial gates.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS UNR wrote it up.
Minor flooding occurred along the Cheyenne River from upstream of Wasta to Lake Oahe due to releases from Angostura Dam, snowmelt, and ice jams. On March 15, releases began from Angostura Dam through the radial gates. With ice still in the river, the water began cutting away at the ice, causing large chunks of ice to make their way downstream. A large ice jam formed just downstream from the gage near Wasta. As water backed up behind the jam, minor flooding was observed. The ice jams continued to form and release all the way to Lake Oahe until the ice was completely cleared from the river.
The national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
The peak gage height at the Cheyenne River at Wasta reached a preliminary height of 13.98 feet.
The peak gage height at the Cheyenne River at Wasta reached a preliminary height of 13.98 feet.
The peak gage height at the Cheyenne River at Plainview reached a preliminary height of 18.98 feet on March 22. The peak flow of just over 10,000 cfs occurred after the ice was gone.
The peak gage height at the Cheyenne River at Plainview reached a preliminary height of 18.98 feet on March 22. The peak flow of just over 10,000 cfs occurred after the ice was gone.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2019Every state in 2019This day in weather historyWarnings in South Dakota, March 2019
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 814986, 815422, 815432, 815507.