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PHZ116 Kaiwi Channel- 326 Am Hst Thu Apr 25 2024
.small craft advisory in effect through early Friday morning - .
Today - East northeast winds 25 to 30 knots. Seas 8 to 9 feet. Wave detail: east 8 feet at 7 seconds. Isolated showers this morning. Tonight - East northeast winds 20 to 25 knots. Seas 5 to 8 feet. Wave detail: east northeast 8 feet at 7 seconds. Isolated showers. Friday - East winds 20 to 25 knots. Seas 5 to 8 feet. Wave detail: east northeast 7 feet at 8 seconds. Isolated showers. Friday night - East winds 15 to 20 knots. Seas 5 to 8 feet. Wave detail: east northeast 7 feet at 7 seconds and northwest 3 feet at 14 seconds. Isolated showers. Saturday - East winds 15 to 20 knots. Seas 5 to 7 feet. Wave detail: east northeast 6 feet at 7 seconds and northwest 3 feet at 13 seconds. Isolated showers. Saturday night - East winds 15 to 20 knots. Seas 5 to 7 feet. Wave detail: east 5 feet at 7 seconds. Isolated showers. Sunday - East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east 5 feet at 6 seconds. Isolated showers. Monday - East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east 5 feet at 7 seconds. Isolated showers.

PHZ100 326 Am Hst Thu Apr 25 2024
Synopsis for hawaiian coastal waters - High pressure northeast of the state will help drive strong to near gale force trades through today. The high is forecast shift east and begin to weaken Friday through the weekend while an area of low pressure develops far northwest of the state. Winds will gradually ease overnight through weekend, then holding into early next week.

FXHW60 PHFO 251315 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 315 AM HST Thu Apr 25 2024

SYNOPSIS
Breezy to locally windy trade winds will continue into Friday morning. Expect enhanced trade wind showers through this morning as a band of unsettled clouds rides through the islands on the trade winds. These showers will decrease in coverage later this afternoon as the band drifts west of the island chain. Trade wind speeds will decrease slightly from Friday into the weekend as the high pressure ridge to the north weakens and a low pressure system deepens far northwest of the state.

DISCUSSION
Satellite imagery this morning shows a lingering band of unsettled showers drifting through the islands on the trade winds. Expect enhanced showers to last through this morning with rainfall amounts favoring windward and mountain slopes. These extra showers should ease up by mid morning as more stable clouds will fill into the Hawaii region from the east.

Wind speeds will continue at moderate to locally windy levels into Friday morning. The high pressure system northeast of the state will drift farther towards the east. A cut off surface low will also deepen far northwest of Kauai. The forward motion on the cut off low northwest of the islands stalls as it pushes up against the ridge. The movement of these two surface pressure systems will weaken the ridge north of the island chain and decrease wind speeds from Friday afternoon into Saturday with more moderate trade winds lasting into the first half of next week.

Next week's weather starts with moderate east to southeast wind flow and fairly dry conditions on Monday and Tuesday. Breezy easterly winds with brief passing showers may return from Tuesday night onward.

AVIATION
Breezy to locally windy trade winds will prevail into Friday morning. Clouds and SHRA with MVFR conds will continue to favor windward and mauka areas, with isol SHRA reaching leeward areas.

AIRMET Sierra in effect for tempo mtn obsc for all islands.

AIRMET Tango is in effect for moderate low-level turb downwind of the terrain for all islands, with little change expected through the forecast period.

MARINE
A 1030 mb surface high northeast of the state, will slowly drift eastward over the next several days. This feature will help drive strong to locally near gale east northeasterly trade winds across the islands through Thursday. By Friday, the high is forecast to weaken, as low pressure develops well northwest of Hawaii. In response, easterly winds will gradually weaken to light to moderate and shift slightly out of the east southeast by the weekend into early next week. A Small Craft Advisory remain in effect for all Hawaiian coastal waters through Thursday. Beyond Thursday, this hazard may need to be extended for some of the typical windier waters of Maui County and the Big Island as trades ease.

Surf heights will remain below advisory thresholds for all shores through the forecast period. Offshore buoys are showing signs of the new medium period northwest swell filling in. Can expect surf to rise locally by the early morning hours and through the afternoon Thursday, peaking Thursday night. Another small, medium period northwest pulse will enter the waters Friday night, peak Saturday, and subside Sunday. Expect these swells to produce small surf along north and northwest facing beaches. Persistent trades will continue to produce choppy, rough surf through the rest of the week along east facing beaches. By this weekend, weakening trades will allow this surf to lower and hold into early next week.
Small background southerly swell will lead to small surf along south facing beaches through the forecast period.

HFO WATCHES/WARNINGS/ADVISORIES
Small Craft Advisory until 6 AM HST Friday for all Hawaiian waters-

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Honolulu, Honolulu Harbor, Oahu Island, Hawaii, Tide feet

Hanauma Bay
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Thu -- 03:21 AM HST     0.66 feet High Tide
Thu -- 06:03 AM HST     Sunrise
Thu -- 07:05 AM HST     Moonset
Thu -- 09:15 AM HST     -0.19 feet Low Tide
Thu -- 04:28 PM HST     1.90 feet High Tide
Thu -- 06:54 PM HST     Sunset
Thu -- 08:52 PM HST     Moonrise
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Hanauma Bay, Oahu Island, Hawaii, Tide feet

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