A flash flooding threat persists for Oahu through this afternoon with comparatively few showers expected elsewhere. Light to moderate trades return this weekend.
Light to moderate southerly winds will continue into the afternoon giving way to a more easterly shift. Rain will also continue with intermittent MVFR conditions. Scattered MVFR conditions can be expected elsewhere.
For the Honolulu terminal, expect a gradual decrease in wind gusts and a shift from southerly to southeast tonight.
For the Lanai terminal, IFR and LIFR conditions have persisted this morning where the cloud deck is 300 ft. These conditions should improve later this afternoon.
AIRMET Sierra is in effect for tempo mountain obscuration across all of Kauai and Oahu. It is also in effect for south through west facing portions of Molokai and Lanai. Tempo IFR conditions are also possible within the rain showers currently moving through western Oahu.
AIRMET Tango is in effect for low level turbulence downwind of terrain which in southerly flow is east and north of island mountains.
Gentle to moderate south to southeast winds will continue through Friday as a low pressure system deepens north to northwest of Hawaii. Tropical moisture will lift from the south over the islands under a cold upper low, producing periods enhanced showers across the state. A passing low level trough will then drift from east to west through the islands from Sunday into the first half of next week, potentially extending these unstable wet weather trends.
South swell will continue into next week with pulses of long period reinforcement arriving today and Saturday. Surf will remain a few feet below advisory levels along south facing shores.
Small to moderate surf along north and west facing shores will continue through the rest of the week as swell energy is reinforced by the slowly moving surface low north to northwest of the Hawaiian Islands. A larger swell will arrive around Tuesday, boosting north and west shore surf to just below advisory thresholds. Surf along east facing shores will remain small as local winds remain fairly weak.
Flood Watch until 6 PM HST this evening for Central Oahu-East Honolulu-Ewa Plain-Honolulu Metro-Koolau Leeward-Koolau Windward- Oahu North Shore-Olomana-Waianae Coast-Waianae Mountains.
