162 FXHW60 PHFO 081709 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 709 AM HST Sun Jun 8 2025 .UPDATE... Based on first light surf observations and recent buoy measurements, the High Surf Advisory for south shores has been cancelled. && .SYNOPSIS... The high pressure ridge north of the Hawaiian Islands will continue to produce light to moderate trade winds through Tuesday. Easterly trade winds will increase into the moderate to breezy range from Wednesday onward, as the ridge north of the islands strengthens. A fairly stable pattern will keep fair weather conditions in the forecast with only brief passing showers mainly over windward and mountain areas, favoring the overnight to early morning hours. Sea breezes will expand in coverage along terrain sheltered western slopes of all islands. && .PREV DISCUSSION.../ISSUED 328 AM HST Sun Jun 8 2025/ Fairly stable conditions remain in place over the Hawaiian Islands this morning with stable low clouds drifting into the windward mountain slopes of each island on the trade winds. In the upper level we see the subtropical jet stream flowing across the islands today, producing high level cirrus clouds across the state, enhancing island sunrise and sunset colors. A weak subtropical ridge north of the state will continue to produce light to moderate easterly trade winds through Tuesday. These lighter large scale winds will allow sea breezes to expand in coverage along the terrain sheltered western slopes of all islands each day. This hybrid wind pattern will allow some clouds and perhaps a few stray showers to develop over island interior sections each afternoon along the trade wind and sea breeze convergence zones. The ridge will strengthen by the middle of next week with trade winds increasing back into the moderate to breezy range from Wednesday onward. Fairly stable conditions aloft will keep shower activity to a minimum across the Hawaiian Islands. Trade wind inversion heights will remain in the 5,000 to 7,000 foot range, capping vertical cloud development for much of the forecast period. This means only brief passing showers are possible for most areas for the next seven days. && .AVIATION... The high pressure ridge north of the Hawaiian Islands will continue to produce light to moderate trade winds through Tuesday. A hybrid sea breeze and trade wind pattern will develop over each island, with daytime sea breezes developing along terrain sheltered western slopes of each island. Brief passing showers are possible over windward and mountain areas, favoring the overnight to early morning hours. VFR conditions will prevail through the weekend. No AIRMETs are in effect. && .MARINE... A high pressure ridge will remain far northeast of Hawaii over the next several of days, then set up north of the state during the second half of the week. The current south-southwest (200 degree) swell will bring large breaking surf to all south facing shores through the day today, then gradually decline early next week. A High Surf Advisory is in effect for south facing shores through 6 PM HST today. No other significant south swell sources expected through the remainder of next week. Surf along east facing shores will remain moderate as the northeast swell continues to decline today. Trade winds will keep choppy, short period swell along east shores Monday and Tuesday, then will pick up as winds strengthen midweek. A small, short period north swell will linger this week with tiny surf expected through most of the coming week. && .HFO WATCHES/WARNINGS/ADVISORIES... None. && $$ UPDATE... DISCUSSION...Bohlin AVIATION...Bohlin MARINE...Walsh