Jul 11, 2020
A sharp short wave trough embedded within a broad upper level trough over the northeastern U.S. supported a wave of convection that moved across the entire area. A precipitable water value of 1.65 inches was observed on the KBUF sounding, and models suggested over 2 inches in portions of the area. This combined with an incoming mesoscale convective vortex to drive slow-moving and heavy rain-producing thunderstorms. While shear was minimal in the environment, the MCV resulted in locally higher sh
Source: NOAA National Weather Service Storm Events Database (event 912648). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Cattaraugus County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.