Original: At Nu‘uanu Pali on Oahu, a gauge recorded a total precipitation of 10.25 inches (260.4 mm); the gauge also reported 1.6 inches (40 mm) in 15 minutes, as well as 4.11 inches (104 mm) in one hour.
Simplified: At Nu‘uanu Pali on Oahu, the rain reached 10.25 inches (260.4 mm).