Very heavy rains fell in the Guadalupe River Basin over the week long period from August 27 to Sept 5th. Rainfall amounts of 10 to 20 inches were estimated across the area. The official observation point at Victoria Airport measured 11.98 inches. Water drainage into the Guadalupe River Basin caused the river to rise very rapidly on Aug 31 from 7.5 feet to 27.71 feet during the day on Aug 31. The Guadalupe leveled off at approximately 28.5 feet and remained at that high level for over 4 days cresting at 29.01 feet on Aug 3rd at 8pm. The river remained high because of the additional heavy rains that fell primarily over Victoria and Dewitt Counties.
The amount of flow going down the Guadalupe River during the height of the flood was measured at 26,988 cubic feet per second (cfs). How does this compare to the record floods of 1998? On October 20, 1998 the Guadalupe rose to 33.09 feet. The flow of water at that time was measured at an astonishing 466,000 cfs!
During the week long period, the Guadalupe River experienced major flooding in which a large portion of Riverside park was flooded, upper mission valley road was cut off and several homes were flooded in the Green Addition. Also, during the height of the heavy rains, Spring Creek was flooded cutting of several roads on the northwest side of town.
Below you will see a graph of the Guadalupe River as measured from the gauge at the Moody street bridge. In addition the following photographs show what the river looked like on Lower Mission Valley Road and in Riverside Park near the height of the flood.
Guadalupe River Photos