Flooding continued to ease on portions of the Big Sioux River from around Akron southward to near Richland.
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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 FSD wrote it up.
Flooding continued to ease on portions of the Big Sioux River from around Akron southward to near Richland.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Sep 30, 9:41 PM CST, 2 hours 19 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
River levels on the Big Sioux River at Akron (gage site AKRI4) continued to fall in early October. Impacts were limited to minor agricultural flooding.
River levels on the Big Sioux River near Richland (gage site BSRS2) continued to fall in early October. Impacts were limited to minor agricultural flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2018Every state in 2018This day in weather historyWarnings in Iowa, October 2018
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: 786675, 786676.