May 1, 2022
An upper air disturbance caused heavy showers and isolated thunderstorms. Early on in the episode, a flash flood occurred over a portion of Maui along Piilani Highway. Otherwise, the precipitation produced small stream and drainage ditch flooding, and ponding on roadways, over other parts of Maui and on the Big Island. No serious injuries were reported.
Source: NOAA National Weather Service Storm Events Database (event 1018140). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Maui County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.