Event narrative (NOAA)
Heavy rainfall measured and estimated between 7 and 18 inches in a 3 to 5 hour period produced locally devastating flooding in Weslaco and Mercedes, just north of the expressway. Measured rainfall at the Weslaco Cooperative station was 15.57 inches for the event, with 11.36 of it falling in a three hour period generally between 3 AM CST and 6 AM CST. Radar estimates suggested higher amounts at the Las Brisas and other neighborhoods in northeast Weslaco, where nearly all homes had 18 inches of water depth or higher inside. ||The rain flooded (at least 18 inches) 2500 homes in Weslaco, with an unknown number (but likely in the 1,000 range) in next-door Mercedes. Video, photograph, and first response/law enforcement evidence showed widespread 2 to 4 feet of water depth, with a few poorly
Other notable flash flood events in Texas
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.