Jul 20, 2004
An upper level disturbance produced slow-moving thunderstorms along the south shore of Lake Ontario. The thunderstorms produced hail over Niagara, Orleans and Monroe counties. Three-quarter inch hail was reported in Pittsford, Pekin and Sanborn. One-inch hail fell in Ridgeway. The slow moving thunderstorms dropped two to three inches of rain inundating numerous streets in Lewiston.
Source: NOAA National Weather Service Storm Events Database (event 5414169). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Niagara County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.