Honolulu is slogging through a stormy Friday, April 10, with thick clouds and frequent thunderstorms rolling across town and a statewide Flood Watch in place through 6 p.m. HST. Heavy downpours could trigger rapid urban and stream flooding in low-lying and poorly drained neighborhoods, and the morning commute is shaping up to be both wet and gusty. Southerly winds will hang on through the day, then gradually ease this evening as the front slides east.
Afternoon Flood Threat
The statewide Flood Watch remains posted through 6 p.m. HST Friday, April 10, and forecasters are warning about frequent showers and thunderstorms with the potential to quickly overwhelm streets and streams. The National Weather Service is calling for new rainfall amounts of 2 to 3 inches overnight, with some pockets topping 4 inches during Friday. A few storms could dump very heavy rain in a short burst. For the latest advisories and any upgrades, check in with NWS Honolulu.
Winds, Marine Conditions, And Advisories
Southerly winds are running around 17 to 18 mph with gusts near 25 mph through the morning and midday, then shift to lighter and more variable breezes behind the front tonight. A Small Craft Advisory and Wind Advisory are both in effect for portions of the islands through 6 p.m. HST. Mariners should plan for elevated seas, choppy conditions and the risk of waterspouts in any stronger thunderstorms. Surf along south-facing shores is backing off, but east-facing spots could see a bit more chop later in the week as the southeasterly flow strengthens.
Closures And Local Impacts
State and city offices, along with some schools on Oʻahu, have announced Friday closures as officials gear up for heavy rain and potential flooding. County emergency managers are urging residents to keep an eye on local alerts and steer clear of low-lying roads. The closures and preparation notices were reported by Hawai‘i Public Radio. Drivers and commuters should be ready for localized road closures, service interruptions and delays for outdoor events and ferries where flooding or debris interfere with infrastructure.
What To Do Now
If you are on the roads, do not try to drive through flooded streets. Turn around, do not drown, and ease off the gas on wet pavement to avoid hydroplaning. Secure loose outdoor items, bring boats into safe harbor if you can, and keep a battery-powered radio or a charged phone handy for updates and any Flash Flood Warnings. If your home is in a flood-prone area, move valuables to higher ground and follow instructions from county civil defense or first responders.
More Reading And Updates
For background on the broader kona low setup behind this week’s heavy rains, see our earlier coverage of the broader kona low setup. Keep checking forecasts through the afternoon and follow official alerts for any Flash Flood Warnings that may be issued.
