| Current Conditions | ||
| Temp |  | 7.2 C |
| RH | | 50 % |
| Wind | | WSW 0 mph |
| Road | | Open (4x4) |
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Hawaiian Islands Synoptic Discussion and Guidance 730 FXHW60 PHFO 080154 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 354 PM HST Sun Aug 7 2022 .SYNOPSIS... Showers over Kauai will diminish this evening, while drier air and fair trade wind weather remains across the remainder of the islands. Trade winds settling in across the islands, will refocus showers along mainly windward and mauka areas this week. Trade winds could gradually strengthen to locally strong by the middle of the week, as an area of low pressure potentially develops and passes far south of the state. && .DISCUSSION... Current radar trends continue to show showers lifting up across Kauai and the surrounding waters this afternoon. A few slightly heavier showers were lingering over the western portions of the island and its adjacent waters. Expect these showers to continue over the western end of the state through this evening as a weak surface trough continues to exit west, while moisture continues to stream up across the region in advance of an upper low to the northwest. Weak instability lingers just west of Kauai enhancing some rainfall rates this evening, however the most unstable air remains well north of the area. The latest trends show the deeper layer moisture and showers will slowly diminish over Kauai later evening, as the upper low slowly exits to the northwest. Otherwise, a much drier airmass will continue to stream in from the east across the remainder of the islands, generating fair trade wind weather through tonight. The trade winds which have already been developing over the islands, will settle in across the state this week as the ridge of high pressure becomes further established north of the state. This trade wind pattern, will focus showers to more favored windward areas through the middle of the week. Locally strong trades are possible, along with some increase in showers over the southern end of the state, by mid-week as an area of low pressure potentially develops and passes far south of the state. && .AVIATION... Moderate trades will return to all islands as high pressure builds to the north of the state. A weak area of enhanced low level moisture and instability moving west of Kauai will continue to bring a slight uptick in afternoon and evening shower activity. Otherwise, trades will allow for a return of more typical scattered windward/ isolated leeward shower regime tonight for all islands. AIRMET Tango remains in effect for portions of Maui and Molokai due to low-level mechanical turbulence leeward of mountains. && .MARINE... Easterly trade winds will hold around the Big Island and Maui and gradually strengthen over Oahu and Kauai waters tonight and Monday. A surface trough northwest of Kauai will slowly weaken and drift northward during this time, allowing high pressure to the distant north to exert a greater influence. As a result, moderate to locally strong easterly trade winds that are already in place around the Big Island and Maui County will spread across the entire area. A Small Craft Advisory (SCA) for the typically windy waters around Maui County and the Big Island has been extended through Wednesday night. A further increase in winds is expected late Tuesday or Wednesday as a tropical disturbance passes far south of the islands. This may require and expansion of the SCA to additional waters. Little significant swell is anticipated through the week. A small short-period northeast swell will diminish on Monday. Building trade winds will produce a gradual increase in short-period waves to east facing shores during the next couple of days, peaking near or slightly above seasonal average on Wednesday. A very small, long-period south swell may arrive Tuesday and fade by Thursday. A small, shorter-period south-southeast swell is expected over the next couple of days, with a larger pulse from the same direction possible next weekend. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 AM HST Thursday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. && $$ DISCUSSION...SWR AVIATION...Thomas MARINE...Wroe Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
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