Showers dump 3 to 4 inches of rain on parts of Oahu

Showers dump 3 to 4 inches of rain on parts of Oahu
Radar midday Friday shows heavy rain across western portions of Oahu. (Source: Hawaii News Now)

HONOLULU, Hawaii (HawaiiNewsNow) - Showers on Oahu dumped 3 to 4 inches of rain on Friday afternoon in leeward areas that don’t normally see a lot of rainfall.

The National Weather Service issued a flood advisory for East Oahu until 8:15 p.m. Rainfall of up to 2 to 3 inches per hour was observed in the Maunawili area.

The western half of Oahu was under a flood advisory during the early afternoon. That advisory was allowed to expire at 3:15 p.m.

The Palehua rain gauge in the Waianae range recorded 4.51 inches of rain in the 12 hour period between 2 a.m. and 2 p.m. Friday.

A flood advisory was also posted during the midday hours for Kauai’s southern half. Hanapepe recorded the most rain, 1.60 inches between 2 a.m. and 2 p.m.

The heavy rain is from an area where moisture is converging ahead of a dissipating front to the northwest of the state. The front itself is expect to dissipate by Saturday.

Here are selected significant rainfall totals for the 12-hour period ending at 2 p.m. Friday (in inches):


  • Hanapepe, 1.60 inches
  • Port Allen, 1.52 inches
  • Kalaheo, 1.24 inches
  • Mount Waialeale, 0.70 inches
  • Waimea Heights, 0.60 inches


  • Palehua, 4.51 inches
  • Lualualei, 2.78 inches
  • Waianae Valley, 2.61 inches
  • Waiawa Correctional Facility, 2.41 inches
  • Makaha Stream, 1.78 inches
  • Kunia Substation, 1.65 inches
  • Schofield East, 1.55 inches
  • Wheeler Army Air Field, 1.51 inches

Copyright 2020 Hawaii News Now. All rights reserved.Kalahe