Hawaii Braces for Extreme Rainfall as Kona Low Stalls Over Islands

Parts of western Hawaii could see up to 4 months' worth of rain in just days, raising flood risk

Published on Mar. 10, 2026

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A powerful Kona low weather system is expected to bring extreme rainfall to Hawaii this week, with some areas potentially seeing up to a foot of rain over the next several days. Forecasters warn that parts of western Hawaii, particularly Kauai and Oahu, could see up to four months' worth of typical March rainfall, raising the risk of significant flash flooding, road closures, and landslides.

Why it matters

Hawaii is highly vulnerable to flooding and landslides due to its tropical climate and mountainous terrain. This extreme rainfall event could lead to widespread disruption and damage, impacting transportation, infrastructure, and the daily lives of residents and visitors.

The details

According to the National Weather Service, the Kona low system will draw deep tropical moisture across the islands, producing persistent bands of heavy rain and thunderstorms that could generate intense rainfall rates. Forecasters warn that the western half or even two-thirds of the state could see over 7 inches of rain, with some windward-facing slopes potentially receiving well over a foot of precipitation.

  • The flood watch for Niihau and Kauai is already in effect.
  • The flood watch for Oahu begins on Tuesday night.
  • The flood watch for Maui goes into effect on Wednesday.

The players

National Weather Service (NWS)

The federal agency responsible for weather forecasting and issuing warnings in the United States, including Hawaii.

Scott Kleebauer

A meteorologist with the NWS Weather Prediction Center who provided insights on the extreme rainfall event to Newsweek.

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What they’re saying

“The western islands are definitely the ones under the highest threat for significant rainfall. We are looking at ... 7-plus inches of rainfall out around where Honolulu is located.”

— Scott Kleebauer, Meteorologist, NWS Weather Prediction Center (Newsweek)

“Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain.”

— NWS Honolulu (Newsweek)

What’s next

The National Weather Service will continue to monitor the Kona low system and provide updated forecasts and flood watches as the storm progresses across the Hawaiian islands.

The takeaway

This extreme rainfall event highlights the increasing frequency and intensity of weather-related disasters that Hawaii and other island communities must prepare for due to climate change. Residents and visitors should heed all weather warnings and be ready to take immediate action to protect themselves from potential flooding and landslides.