Tropical Depression Fausto will pass Hawaii to the north today and weaken to a remnant low or trough resulting in light winds and muggy conditions. Trades will quickly fill in tonight through early need week.
Tropical Depression Fausto will pass Hawaii to the north today and weaken to a remnant low or trough. Indirect influence of the wind will keep light sea breezes across the islands with muggy and warm conditions today. Radar shows isolated windward showers across Oahu and Molokai this morning, but little rainfall elsewhere. Expect mostly dry conditions through the morning until sea breezes bring interior clouds and showers this afternoon. Confidence in the flooding threat from Fausto remains low but localized heavy showers can not be ruled out. Remnants of Fausto will move away tonight with breezy southeast winds filling in east to west.
Thursday into next week, a strong high will develop far northeast of the state allowing breezy to locally strong winds to return. Expect a more typical tradewind pattern with showers focused mainly along windward and mauka areas. Drier air will also filter allowing dewpoints to dip below 70 degrees by Friday. Hurricane Genevieve will disrupt the trade wind flow on Tuesday as it passes by well the northeast.
Weakening winds due to tropical depression Fausto moving WNW north of the islands will allow a land/sea breeze pattern to develop. While some windward and mauka SHRA are expected into the morning hours, SHRA are also possible in the afternoon over island interiors. MVFR conds likely within any heavier SHRA with some isol IFR conds. Otherwise VFR prevails.
AIRMET Sierra is in effect for mtn obsc for windward sections of Kauai to Maui. Conds should improve east to west in the morning hours.
With Tropical Depression Fausto passing north of the islands through the offshore waters today, winds will be light and variable over the coastal waters. Additionally, seas have fallen below 10 ft in the coastal waters, so the Small Craft Advisory has been canceled. Immediately in Fausto's wake, moderate to fresh east to southeasterly winds will sweep from east to west across the marine areas through Friday as Fausto moves off to the northwest and loses tropical characteristics. At the same time, high pressure builds to the north, allowing east- northeast trades to build back in beginning on Thursday, then strengthen to fresh to locally strong levels on Friday through the weekend.
Nearshore buoys on the eastern side of the islands are showing a fairly rapid decline in swell energy from the weakening Tropical Depression Fausto. Surf along east facing shores has diminished to advisory thresholds and will continue to decline today. A High Surf Advisory for east facing shores remains in effect through this afternoon. A small bump in short to medium period swell energy will arrive from the northeast and even north as the depression passes north of the islands through tonight, providing some small surf along north facing shores. This will fade back to flat to tiny levels by Thursday. East shore surf will trend back up Friday into the weekend due to a combination of rising trade wind swell and a new long-period east swell generated by Hurricane Genevieve in the East Pacific.
A medium period south swell building today and tonight will push south shore surf to near the summer average (5-6ft) for Thursday. Surf will then fade gradually through the weekend, but will continue to see a mix of small south swells maintain surf just below seasonal average.
High Surf Advisory until 6 PM HST this evening for Olomana-Maui Windward West-Kauai East-East Honolulu-Koolau Windward-Molokai Windward-Molokai Southeast-Windward Haleakala-Kipahulu-Big Island Southeast-Big Island East-Big Island North.
