Flash flood watch for Oahu and Maui County - Hawaii News Now - KGMB and KHNL

Flash flood watch in effect for Oahu, Maui County as cold front moves through isles

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Radar imagery at 6:42 p.m. Sunday. Courtesy: NOAA Radar imagery at 6:42 p.m. Sunday. Courtesy: NOAA
HONOLULU (HawaiiNewsNow) -

A Flash Flood Watch remains in effect for the islands of Oahu, Molokai, Lanai, Maui and Kahoolawe because of the threat of heavy rain from a cold front passing through the islands. Forecasters cancelled the watch for Kauai and Niihau.

The National Weather Service said that the front could also bring possible thunderstorms, which could result in locally intense rain rates and the threat of flash flooding.

Most of the energy associated with the front's supporting upper trough is currently north of the islands, but there's enough instability to trigger a slight chance of thunderstorms through Monday.

On Oahu, 4.36 inches of rain fell in at the Punaluu Pump rain gage between 2 p.m. and 8 p.m. Sunday. The nearby Punaluu Stream gage recorded 4.11 inches. Wheeler Air Field recorded 3.36 inches, while 3.07 inches fell in Mililani and 2.62 inches in Poamoho during the same time period. Many Waianae coast gages received between one and one and-a-half inches of rain.

Rain showers were constant on Kauai earlier Sunday, with 3.77 inches of rain recorded in Poipu between 5 a.m. and 5 p.m. Lihue Airport recorded 2.32 inches, Kalaheo 2.14 inches and Mount Waialeale 2.13 inches of rain during the same time period. Nearly all of the rain gages on the Garden Isle picked up at least an inch of rain.

People are advised to avoid camping or hiking near streams and low lying areas. You should monitor the latest forecasts and be prepared to take quick action if flash flood warnings are issued.

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