The National Weather Service in Honolulu reports that recent weather conditions have included periods of moderate to heavy showers and isolated thunderstorms, mainly affecting Kauai and Oahu. Forecasters are monitoring a band of clouds associated with this activity. Overnight rainfall totals of approximately 1 to 3 inches were recorded across northern Oahu. The weakening front responsible for the showers is expected to move northwestward tonight. Upper-level ridging is forecast to promote more stable conditions over the weekend.
A Flood Watch remains in effect for Kauai and Oahu through this afternoon and may be extended for Kauai if atmospheric instability increases with the arrival of another upper-level wave. The NWS stated that surface-level convergence and the position of a lingering band of showers could result in renewed shower activity during the afternoon and evening. Forecasters indicate that periods of heavy rainfall are possible, with a risk of localized flash flooding.
Marine conditions near Kauai and Oahu have been affected by thunderstorms and showers, with unsettled conditions potentially continuing through Friday. Some areas have already met Small Craft Advisory criteria as a result of these storms. Easterly trade winds are forecast to gradually strengthen and may reach advisory levels again by Sunday, especially around Maui County and the Big Island. Along north-facing shores, elevated surf is expected to continue, with a combination of north and north-northwest swells producing High Surf Advisory conditions that may persist into Friday.
Aviation conditions are being affected by a convective cloud band, leading to advisories for potential mountain obscuration and moderate turbulence. On land, fire weather conditions are expected to become less favorable for fire spread as trade winds increase and bring more stable conditions beginning Friday. Wind speeds and humidity levels are forecast to remain below critical fire weather thresholds through next week.
Unsettled conditions are expected to continue, and monitoring of advisories and updates is recommended to stay informed. More stable weather is forecast to develop early next week.
