| Current Conditions | ||
| Temp |  | 1.8 C |
| RH | | 45 % |
| Wind | | N 14 mph |
| Road | | Open (4x4) |
|
Menu of Text Products for the Hawaiian Islands and the Tropical Pacific/Atlantic Oceans: |
|
Narrow the Menu List Select Time Limit: 12 hours | 24 hours | 48 hours | 72 hours | No time limit Select Product Type: All | Routine Bulletins/FCSTS | Warnings/Watches/Advisories | HAWN Weather | Tropical | Marine | Aviation | Daily Obs | Special |
|
|
Hawaiian Islands Synoptic Discussion and Guidance 147 FXHW60 PHFO 010132 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 332 PM HST Thu Jun 30 2022 .SYNOPSIS... Surface high pressure is centered far north of the area. This places the islands in a breezy to locally windy trade wind environment. A few passing showers can be expected mainly over windward and mauka areas. An upper level trough will pass across the area from east to west Saturday through Sunday night with an uptick in showers expected especially for windward and mauka areas. A drier trade wind weather pattern is then expected Monday through Thursday. && .DISCUSSION... Surface high pressure is centered far north of the area placing the islands in a breezy to locally windy trade wind environment. Moisture embedded in the trades is providing for passing showers over windward and mauka areas with most leeward locations remaining dry. Daytime heating will cause clouds and few showers to form over the Kona slopes this afternoon and evening. Some thin high clouds will occasionally move over the area from time to time in southwesterly flow aloft. Little change in this weather pattern is expected through Thursday. A Wind Advisory is currently in effect for the summit area of Haleakala where wind speeds are currently blowing above 45 MPH. We will also have to keep an eye on the Big Island summits as winds may also increase to advisory levels over the next day or so. As we head into the weekend, a trough aloft is forecast to be near the Big Island on Saturday, then pass from east to west across the state Saturday night through Sunday night. This will likely destabilize the airmass a bit across the area. Shower activity is expected to increase with most showers falling over windward and mauka areas. The trade winds will be sufficiently strong enough for some brief passing showers to fall over select leeward areas at times. There may also be some increase in showers over the Kona slopes during the afternoon and evening hours with a few locally heavy downpours possible. The upper trough is expected to be west of the area Monday and Tuesday with a drier trade wind weather pattern expected. Little change is expected on into Thursday. && .AVIATION... Visible satellite imagery still shows a large area of mostly stable, mid-level clouds moving into windward Big Island and Maui this afternoon, with some showers embedded. Moderate to breezy trade winds will continue for the next several days as strong high pressure remains far north of the area. Showers and any accompanying MVFR conditions in lower ceilings and visibilities will be brief and mainly affect windward and mauka sections across the state. However, VFR conditions will dominate in most areas.Afternoon and evening cloud buildups over leeward Big Island will gradually clear out overnight. AIRMET Tango remains in effect for moderate low-level turbulence downwind of the higher terrain of all islands due to the breezy trades. && .MARINE... A strong 1031 mb surface high centered about 1200 miles NNE of the islands will move slowly W, and strengthen a little through early next week. Strong to near-gale E trade winds will prevail, with winds strongest in the channels between the islands. A Small Craft Advisory (SCA) for most zones has been extended through Sunday afternoon. Surf will be below High Surf Advisory levels along all shores through the next week as the current diminishing S swell continues to fade through Friday. Only background swell from the S and SE is expected thereafter. Trade wind swell will bring rough and choppy surf to E facing shores. Otherwise, no significant swell sources are seen. && .HFO WATCHES/WARNINGS/ADVISORIES... Wind Advisory until 6 AM HST Friday for Haleakala Summit. Small Craft Advisory until 6 PM HST Sunday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel- Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. && $$ DISCUSSION...Burke AVIATION...TS MARINE...Birchard Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
|