| Current Conditions | ||
| Temp |  | 3.3 C |
| RH | | 66 % |
| Wind | | NE 21 mph |
| Road | | Open (4x4) |
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Hawaiian Islands Synoptic Discussion and Guidance 185 FXHW60 PHFO 090158 AFDHFO Area Forecast Discussion National Weather Service Honolulu HI 358 PM HST Sat Aug 8 2020 .SYNOPSIS... Strong trade winds will prevail through the weekend, then gradually trend down through the middle of next week as high pressure to the northeast weakens. Passing trade wind showers will favor windward and mountain areas each day, especially during the overnight and early morning periods as pockets of moisture move through. && .DISCUSSION... A 1034 mb high located far north-northeast of the state will produce strong trades through Sunday. Trade winds are expected to gradually decrease beginning Sunday night and lower to moderate speeds (10 to 20 mph) by Wednesday. This afternoon's radar and satellite imagery are showing a few isolated showers over windward and mauka areas. Looking upstream of the state, a batch of cumulus clouds are approaching the state and will likely bring an increase of shower coverage tonight. As far as precipitation over the next week, we will continue to see our typical trade wind showers where showers will be focused over windward and mauka areas especially during the night time and early morning hours. No significant weather impacts are expected during the next 7 days. && .AVIATION... Fresh to locally strong trades will support scattered showers with periods of MVFR particularly over windward coasts and slopes. The ENE flow characteristic of today has allowed mtn obscuration to be particularly persistent over Oahu and Big Island while Molokai and Maui have been largely free of lower ceilings. However, the latest satellite and ground observations support dropping AIRMET SIERRA for all except Big Island. Slightly drier trades work into the area late Sunday morning. AIRMET TANGO remains in effect below 8000 feet over and immediately south thru west of mountains for tempo moderate turbulence. AIRMET SIERRA remains in effect above 2500 for the Big Island. && .MARINE... A strong high pressure system far to the north northeast will keep strong winds across the coastal waters. A Small Craft Advisory (SCA) is in effect to include the typical windy areas around Maui County and the Big Island, plus Maui Windward Waters, the Kaiwi Channel and Oahu Leeward Waters through Sunday afternoon. Winds are expected to trend down early next week as the high weakens, which should once again bring SCA coverage to the typical windy areas. Surf along south facing shores is expected to return to background levels tonight, but a small, long period south southwest swell may bump surf up slightly Sunday into early next week. Surf along east facing shores will become rough as trade winds strengthen, but is expected to remain below the advisory levels. A small northwest swell will arrive during the second half of the week. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 PM HST Monday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. Small Craft Advisory until 6 PM HST Sunday for Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters. && $$ DISCUSSION...Kino AVIATION...Chevalier/Clark MARINE...Foster Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office |
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