May 6, 2012
A cold front stretched from western Minnesota, across southeast South Dakota, into Nebraska during the evening of the 5th. The front moved slowly southeast into Iowa during the overnight hours. The airmass was very unstable in advance of the front with lifted indices of -3 to -6 and elevated CAPE of 2000 to 3000 J/kg. A strong low level jet of 50 kts developed by the late evening hours with a broad area of deep moisture convergence producing precipitable water values of around 1.5 inches. Do
Source: NOAA National Weather Service Storm Events Database (event 369190). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Audubon County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.