Apr 10, 2023
Rapid snowmelt from a few day period of well above normal temperatures focused on the 11-13th of April resulted in minor flooding for portions of the Rock River Basin. Some areas north of I-90 lost between 2 to 5 inches of snow water equivalent (SWE) from the first to second week of April, but antecedent drought conditions resulted in only a percentage of this water actually making it into the river system.
Source: NOAA National Weather Service Storm Events Database (event 1092004). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lyon County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.