Breezy trade winds will continue to persist through the first half of the week then ease slightly during the second half of the week. Dewpoints in the 70s will continue to produce humid conditions today, but dewpoints should gradually ease tonight into Tuesday with more comfortable humidities returning on Wednesday. Flood Watch remains in effect for the Big Island through this afternoon. The heaviest precipitation is expected over the leeward slopes of the Big Island. Typical summer time weather with mostly dry conditions should return by Wednesday.
.SHORT TERM UPDATE, No major changes this morning. Tropical Depression Moke continues to pass well south of the Hawaiian Islands this morning. Flood Watch still remains in effect for the Big Island through this afternoon. Latest RRFS model shows the heaviest precipitation over the leeward slopes of the Big Island this afternoon with a few inches of rain possible. Meanwhile on the windward side, scattered showers are expected, but no significant rainfall is expected. The threat for flash flooding should diminish by this evening.
Lingering moisture in the wake of Moke will support a bit more widespread than normal windward to mountain showers through at least this afternoon with MVFR conds possible in showers. There is a slight chance of a thunderstorm over the Big Island afternoon, but will unlikely impact the airports. Moderate to locally strong trade winds will continue into at least Tuesday.
AIRMET Tango is in effect for low level turbulence downwind of terrain due to the strengthened trade winds. AIRMET Sierra is in effect for mountain obscurations over windward portion of the islands except for the Big Island.
Fresh to locally strong trades persists as Tropical Depression Moke passes far southwest of the island chain and broad high pressure remains north of the state. Convection associated with this system will remain over the far southern portion of the offshore waters as it tracks west. A Small Craft Advisory remains in effect for most waters around Maui and the Big Island.
Surf along east facing shores will remain rough and choppy due to persistent trade wind swell.
Surf along south facing shores will remain elevated as a small medium period south swell slowly fades today. An overlapping long period south southwest swell is expected to slowly fill in tonight through Tuesday that should provide a slight boost in surf. A slightly larger south swell will fill in Wednesday and peak Thursday. This swell could push surf towards advisory thresholds.
A small, medium period west northwest swell originating from Tropical Storm Lala will fade during the next 24 hours.
Flood Watch until 6 PM HST this evening for Big Island East-Big Island Interior-Big Island North-Big Island South-Big Island Southeast-Big Island Summits-Kohala-Kona.
Small Craft Advisory until 6 PM HST Tuesday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Maui County Leeward Waters-Pailolo Channel.
