Heavy Rain in Kenedy County, Texas

CO-OP observer in Armstrong reported 5.12 inches of rainfall.

A weak surface low drifted slowly westward across the Rio Grande Valley putting the eastern half of the area on the more favorable side of the low, which provided a better environment for slow moving heavy rain production and convection due to better surface convergence. This convection was also assisted by broad weakness in the upper level ridge axis. Deep tropical moisture was draped across the region, and provided the background for efficient rainfall. Showers and thunderstorms during the morning hours dumped at least 5 inches of rain on parts of the Kenedy County King Ranch.

After a brief lull during the late morning hours, showers and storms picked up again in the afternoon due to daytime heating and interaction with old boundaries. Slow moving showers and thunderstorms quickly dropped pockets of 2 to 3 inches in northern and eastern Hidalgo County, which caused some ponding/high standing water and nuisance flooding in poor drainage areas.