Jul 21, 2009
A moist, semi-tropical atmosphere existed over Arkansas on the 21st. A cold front moving through the state triggered some showers. A waterspout and two tornadoes occurred from mid afternoon through early evening. These occurred without any thunder, indicating that the mechanism that caused them was much like the one that triggers waterspouts off the Florida Keys in the summer.
Source: NOAA National Weather Service Storm Events Database (event 182774). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Polk County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.