First Alert Forecast: Flash Flood Warning for Kauai County

News admin September 8, 2026 0 Comments

First Alert Forecast: Flash Flood Warning for Kauai County

HONOLULU (HawaiiNewsNow) – A Flash Flood Warning is in effect for Kauai County until 5pm but could be extended or expanded. There’s a Flash Flood Watch statewide.

There’s a Hurricane Warning for Kauai County and a Tropical Storm Warning for Oahu. A High Surf Warning has been issued for South and West shores and a High Surf Advisory for east-facing beaches.

At 11am, Hurricane Lowell was 275 miles SW of Lihue, Kauai moving NNE at 17 mph. The storm was a category 2 with winds of 110 mph.

Here are the key messages from the National Hurricane Center:

1. Kauai County: The core of Lowell is forecast to pass near Niihau tonight and early Tuesday, and damaging hurricane conditions are expected during that time, with the highest winds atop mountains and on windward and leeward slopes. Large damaging waves will impact exposed portions of the coastline, producing dangerous coastal flooding and inundation of low-lying areas through early Tuesday.

2. Periods of heavy rainfall will increase in coverage over the Hawaiian Islands today and continue through Wednesday. This may produce significant flash flooding and mudslides, especially across Kauai County and portions of the Big Island.

3. Oahu: Tropical storm conditions are expected to begin tonight. Strong, damaging wind gusts could cause tree damage and power outages, especially in areas of higher terrain.

4. Large swells will produce life-threatening surf and rip current conditions during the next several days across portions of the Hawaiian Islands.

5. Rainfall: Hurricane Lowell is expected to produce additional rainfall totals of 6 to 10 inches for Kauai, with maximum totals of16 inches possible. For the Big Island, 4 to 8 inches of rain is expected with isolated totals of 12 inches possible. For Oahu and Maui county, 4 to 8 inches of rain is expected with isolated totals of 10 inches possible. This rainfall may produce significant flash flooding and mudslides, especially across Kauai County and portions of the Big Island.

View the latest weather conditions here.

Download the HNN Weather app from the Apple App Store or Google Play for the latest updates from your First Alert Weather Team: chief meteorologist Jennifer Robbins and weather anchors Guy Hagi, Dan Cooke, Ben Gutierrez, and Billy V.