Area Forecast Discussion
Issued by NWS Honolulu, HI
Issued by NWS Honolulu, HI
679 FXHW60 PHFO 101313 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 313 AM HST Thu Jul 10 2025 .SYNOPSIS... High pressure far northeast of the state will maintain moderate to locally breezy trades through the week. Expect fairly typical summertime weather with clouds and showers favoring windward and mauka areas. && .DISCUSSION... Currently, satellite imagery shows small bands of moisture embedded in the trades with clouds moving into windward and mauka areas. Radar imagery shows showers across the area which are expected to continue into the early morning hours. A high pressure is parked well to the northeast of the state. This high is expected to be in place until Sunday when it will drift off to the north. Due to this high, moderate to breezy trades should continue through Saturday. Once the high starts drifting away trades should weaken a bit. While an organized source of moisture upstream is lacking with a dry and stable airmass overhead we can expect typical summertime showers and clouds to favor windward and mauka slopes through the forecast period. && .AVIATION... Moderate to locally breezy trades will persist for the next couple of days. Low cigs and SHRA should mainly be focused over windward and mauka locations. MVFR conds possible in SHRA, otherwise VFR prevails. AIRMET Sierra is in effect for mtn obsc for windward portions of all of the smaller islands. AIRMET Tango is in effect for low level turb downwind of island terrain. && .MARINE... High pressure far northeast of the waters will drive moderate to locally strong trade winds. The Small Craft Advisory that is in effect for the typical windy waters around Maui County and Big Island has been extended through Friday afternoon. Trades may slightly weaken early next week as the high moves further away to the north. The recent small, long period south swell will continue its decline through the day. A reinforcing longer period south swell is scheduled to arrive Friday night. This little boost, in tandem with another small, long period south swell arriving Sunday night into Monday, will hold south-facing shore surf to summer averages (~5 to 6 ft in higher sets). East-facing shore surf will remain rough as moderate to fresh trades blow the remainder of the week. A very small northwest swell originating behind a front hanging up far northwest of the islands may pass through early next week. && .FIRE WEATHER... Moderate to locally breezy trade winds will continue through the next several days. Afternoon relative humidity should be near summertime normals. Expect typical summertime fire weather conditions into next week. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 PM HST Friday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. && $$ DISCUSSION...Walsh AVIATION...Walsh MARINE...Blood FIRE WEATHER...Walsh