| Current Conditions | ||
| Temp |  | -0.3 C |
| RH | | 100 % |
| Wind | | WSW 47 mph |
| Road | | Closed |
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Hawaiian Islands Synoptic Discussion and Guidance 708 FXHW60 PHFO 300201 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 401 PM HST Thu Oct 29 2020 .SYNOPSIS... A front near the Big Island will weaken and lift away from the state tonight. As the front lifts away, another weak trough passing near the state will bring moderate west to northwest winds through Saturday with some scattered showers. Most of these showers should remain on the lighter side with only light rainfall amounts expected. A ridge will build north of the islands by Monday and bring a return of trade wind weather through most of next week. && .DISCUSSION... A front near the Big Island will weaken and lift away from the state tonight. For rest of this afternoon, moderate to locally heavy showers will continue to persist over the Big Island. These showers should be on a downward trend tonight as the front moves away from the state. Over the summits of the Big Island, a Wind Advisory remains in effect, where southwest winds of 35 to 50 mph are expected through at least Friday afternoon and possibly through Saturday. Over the western end of the state, we will continue to see a cooler and drier airmass with a few light showers possible. As we head into Friday, a weak trough passing near the state will bring some scattered showers across the state. Westerly winds will be on the increase on Friday and could produce gusty winds on the east side of the islands as the winds blow downslope. During the weekend, the trough will lift off to the northeast and will allow the winds to decrease. Light to moderate westerly winds will continue through Saturday and become light and variable on Sunday. Winds should be light enough for the development of afternoon sea breezes on Sunday. This will cause afternoon cloud build ups with some scattered showers expected over interior areas during the afternoon. Also, a weak trough aloft digging south over the area could enhance showers on Sunday. The global models are in good agreement showing a surface ridge building north of the islands by Monday. The ridge will produce easterly trade winds over the islands through most of next week. && .AVIATION... A stable W to NW flow will bring generally VFR conditions to areas from Kauai to Maui County through Friday. Lingering moisture around the Big Island will keep a few showers and low clouds resulting in isolated MVFR conditions along coasts and lower slopes through Friday morning. && .MARINE... A weakening front near northern Big Island will gradually dissipate today and tonight. Moderate to fresh south to southwest winds will persist over the waters surrounding the Big Island, while light to moderate northwest to west winds are expected over the waters adjacent to the smaller islands. This general wind pattern is forecast to continue through Saturday as a surface low moves south then north-northeast of the area and a series of weak disturbances move across the western islands from the north- northwest. Trade winds may return Sunday into early next week as a surface ridge builds north of the state. Buoy 51001 is showing 8 feet wave height and 11 second period this afternoon from the north which suggests the main wave energy generated from the low to our north will arrive at Kauai tonight and Oahu late tonight. This north- northwest swell will subside Friday night into the weekend. Surf along north and west facing shores will stay elevated through early next week due to several northerly swells. Surf along north and west facing shores may reach advisory levels Sunday into Tuesday due to these northerly swells before briefly subsiding mid week. Surf along south facing shores will remain small into early next week due to a mix of southerly swells. Surf along east facing shores will trend up early next week with the possible return of trades. && .HFO WATCHES/WARNINGS/ADVISORIES... Wind Advisory until 6 PM HST Friday for Big Island Summits. && $$ DISCUSSION...Kino AVIATION...Brenchley MARINE...Almanza/Blood Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
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