First Alert Weather Day: Flood Watch extended until Monday afternoon

HONOLULU (HawaiiNewsNow) – The threat of flooding will continue overnight into Monday afternoon, and the First Alert Weather Day will continue statewide as well.
A flood watch has been extended for all islands until 6 p.m. Monday, according to the National Weather Service.
An upper-level disturbance is moving over the state with a very unstable atmosphere that can easily trigger heavy showers and thunderstorms, especially over windward areas.
Any rainfall could trigger flooding on ground already saturated from this weekend’s downpours.
The heavy rain is causing slick road conditions and snarling the Monday morning commute. DOT reported at least two crashes on the H-1 Freeway eastbound.
Drivers are urged to drive with caution, allow adequate distance between vehicles, and use headlights if it’s rainy.
Rain drenched several areas around Oahu Saturday morning, from Manoa to Halawa.
The National Weather Service said more than 7.5 inches of rain fell in Maunawili between 3 a.m. and 9 a.m. Manoa recorded just over five inches during the same period, with most of that falling after 6 a.m.
The Ala Wai Canal was one of many waterways filled with runoff and debris Saturday morning.
Parts of East Maui have already received 6 to 12 inches of rain in 36 hours. It won’t take much additional rainfall to trigger flooding because the ground is already saturated. Heavy rain triggered another flood advisory on the island Sunday afternoon, but it was canceled at 3 p.m.
The Hawaii News Now weather team has marked Saturday, Sunday and Monday as First Alert Weather Days for all islands.
The combination of heavy rain and high surf also shut down Bayfront Highway in Hilo Saturday because of debris on the roadway.
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