Updated 5:34 a.m. Sunday, April 12.
A flood watch remains in effect until 6 p.m. Monday, April 13, for the entire state; however, National Weather Service forecasters in Honolulu expect the heaviest rain bands over Oʻahu and Molokaʻi, possibly spreading westward over Kauaʻi.
Forecasters say showers and isolated thunderstorms will spread over the western half of the state, becoming heavy over central portions of the state through Sunday night, April 12.
Flash flooding is possible because of super saturated grounds as well as elevated streams and rivers in many places following the heavy rainfall and severe weather during the past several days. Some areas could rapidly flood if rainfall rates intensify.
National Weather Service advises the public that road closures could happen in several areas, along with property damage in urban or low-lying spots because of runoff. Landslides also are possible along steep terrain.
A flood watch means conditions are favorable for flooding, but it is not happening or imminent.
Light and variable winds are expected to prevail through the first half of the week, with light trade winds returning thereafter.
Latest radar observations show another band of showers and thunderstorms expected to move into Kauaʻi before rapidly approaching Oʻahu and Molokaʻi while continuing to meander northeastward.
National Weather Service area forecast discussion for Hawaiʻi issued just before 4 a.m. Sunday says much of this renewed activity stems from a broad area of low pressure northwest of the Hawaiian Islands and associated quasi-stationary trough trickling through the middle of the state.
Data also imply a moisture rich environment remains over the state, courtesy of abundant tropical moisture continuing to be pulled in over the islands.
Sunday’s forecast for Kaua‘i County calls for mostly cloudy skies and a high temperature near 76 degrees, with showers and possible thunderstorms, some of which could produce heavy rainfall.
New rainfall amounts of between half an inch and three-quarters of an inch are possible. Chance of precipitation is 90%.
Winds will be calm, becoming east at about 5 mph Sunday afternoon.
Sunday night’s forecast is similar, with mostly cloudy conditions along with showers and possible thunderstorms — again some of which could produce heavy rainfall — and a low temperature of about 65 degrees.
New rainfall amounts between three-quarters of an inch and 1 inch possible. Chance of precipitation is 90%.
Winds will continue to be calm overnight, becoming east-northeast at 5 to 8 mph after midnight.
Visit the National Weather Service Honolulu Forecast Office website for information about any advisories, watches or warnings in effect for your area as well as a complete forecast for you community.
You can also check out Kaua‘i Now’s Weather page (https://kauainownews.com/weather/) for all of your local weather information.
Road closures
These are the most recent road notices as of Saturday afternoon.
- Pe’e Road in Poʻipū is reopen for through traffic.
- The public is advised that heavy ponding could persist in some areas. Kaua‘i County Department of Public Works Roads Division has flooded roads posted in areas with heavy ponding to alert the public.
Kauaʻi Branch of Hawaiʻi Department of Land and Natural Resources Division of Forestry and Wildlife also reports there are multiple closures along Kōkeʻe Contour Road because of erosion caused by recent heavy rains from severe weather.
- Sections of the road between Haʻeleʻele Ridge Road (Trail 3) and Polihale Ridge Road (Trail 4), as well as between Polihale Ridge Road (Trail 4) and Kaʻaweiki Ridge Road (Trail 5), are closed until further notice.
Click here for additional information.
