Sunrise 5:58 AM   Sunset 6:59 PM Moonrise 3:02 AM   Moonset 2:57 PM

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PHZ112 Kauai Leeward Waters- 324 Am Hst Fri May 3 2024
.small craft advisory in effect through early Monday morning - .
Today - East winds 20 to 25 knots. Seas 4 to 6 feet. Wave detail: east 6 feet at 7 seconds. Isolated showers. Tonight - East winds 20 to 25 knots. Seas 5 to 8 feet. Wave detail: east 8 feet at 8 seconds and northwest 3 feet at 14 seconds. Isolated showers after midnight. Saturday - East winds 20 to 25 knots. Seas 6 to 9 feet. Wave detail: east 9 feet at 8 seconds and northwest 3 feet at 14 seconds. Isolated showers. Saturday night - East winds 20 to 25 knots. Seas 6 to 9 feet. Wave detail: east 8 feet at 8 seconds and northwest 3 feet at 13 seconds. Scattered showers. Sunday - East winds 20 to 25 knots. Seas 6 to 9 feet. Wave detail: east 8 feet at 8 seconds. Scattered showers, mainly in the morning. Sunday night - East winds 15 to 20 knots. Seas 6 to 8 feet. Wave detail: east 8 feet at 8 seconds. Scattered showers. Monday - East winds 15 to 20 knots. Seas 6 to 8 feet. Wave detail: east 8 feet at 8 seconds and northwest 3 feet at 14 seconds. Scattered showers in the morning, then isolated showers through the night. Scattered showers after midnight. Tuesday - East northeast winds 10 to 15 knots. Seas 5 to 7 feet. Wave detail: east 7 feet at 7 seconds. Isolated showers, then scattered showers after midnight.

PHZ100 324 Am Hst Fri May 3 2024
Synopsis for hawaiian coastal waters - Fresh to locally strong trades will persist through the weekend as a high builds far north of the state and remains nearly stationary. The high will begin to move east early next week and trades will ease a notch.

FXHW60 PHFO 031338 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 338 AM HST Fri May 3 2024

SYNOPSIS
The high pressure center far north of the Hawaiian Islands will build today producing breezy trade winds across the region for the next several days. An upper level disturbance will enhance passing showers in the forecast into early next week, favoring windward and mountain areas in the overnight to early morning hours. A few of the stronger showers will drift into leeward areas. Long range guidance shows an old frontal band moving into the islands from the northeast by early next week Wednesday. This cloud band may bring another brief round of wet weather to all islands from Wednesday morning into Thursday.

DISCUSSION
Radar imagery this morning shows a fairly wet weather pattern over most island windward and mountain areas. These enhanced shower trends will tapper off a bit by mid morning to afternoon, then a return to more showers later this evening. Satellite water vapor imagery continues to track an unstable upper low northwest of Kauai with an upper level trough lingering over the state. A subtropical jet stream is also evident near the islands. Upper level divergent forcing will continue to keep enhanced showers in the forecast for the next several days.

Two high pressure systems in the Central Pacific far north of the Hawaiian Islands will consolidate into one high center today.
This high center will build slightly just north of the Hawaiian Islands and increase trade winds into breezy range into Monday.
By Monday afternoon the high center begins to drift eastward away from the islands with a frontal trough moving into the Central Pacific basin. This change in large scale pressure patterns north of the islands will decrease trade wind speeds back to more moderate levels from Monday night onward.

Expect continued enhanced showers across the state as the unstable upper level disturbance slowly drifts eastward across the island chain. Most of the rainfall amounts will favor windward and mountain areas as breezy trade winds build clouds up and over the windward mountain slopes. Down sloping trade wind flow over the leeward sides of island mountain ranges will tend to decrease shower activity for leeward areas of each island. Shower trends will tend to increase during our typical diurnal rainfall maximum in the overnight to early morning hours.

In the extended forecast we continue to see a long band of unsettled shallow clouds, remnants of an old Eastern Pacific cold front, drifts into the islands on the moderate trade winds from Wednesday morning into Thursday. This cloud band may produce wet weather over all islands for an 18 to 24 hour time period. The highest rainfall amounts will tend to favor windward areas, however many leeward sites may also see measurable rainfall totals with this next system. This fairly shallow cloud band will likely not be deep enough to produce heavy rainfall, rather more beneficial rain is forecast for all islands. Rainfall chances were increased for the Wednesday into Thursday time period.

AVIATION
Moderate to breezy E trades will continue to strengthen through today as high pressure builds in from the NE. A moisture plume riding the trades should bring in SHRA and MVFR conds to windward and mauka locations. While a few SHRA and lowering cigs/vsbys could reach leeward side, they look to be brief even with a slight increase in coverage. VFR conds should prevail.

AIRMET Sierra is in effect for mtn obsc for windward and mauka portions of the island chain.

AIRMET Tango is in effect for mod turb below 080 downwind of island terrain.

AMD NOT SKED in for Midway due to missing wind speed and direction

MARINE
Latest ASCAT shows fresh to locally strong winds have arrived as a high pressure builds far north of the state. These stronger trades will continue through the weekend and drop a notch or two early next week as the high moves far northeast of the state. The Small Craft Advisory (SCA) for typical windy waters around Maui and the Big Island has been expanded to all waters through early Monday morning. Some area may drop out earlier as winds begin to ease due to the high shifting northeast.

Tiny surf will persist along north and west facing shores through much of today. Forerunners of a long period northwest swell is expected to fill in this afternoon and peak Saturday, bringing small surf along north and west facing shores. Another small, long period northwest swell will fill in late Sunday, maintaining small surf along north and west facing shores into early next week. Small background south swells will continue into Saturday, providing tiny surf for south facing shores. Forerunners of a small, long period south swell may arrive Saturday afternoon with a slow onset through Sunday providing a boost in surf along south facing shores into early next week. Rough and choppy surf along east facing shores will bump up a notch Saturday and hold hold into early next week as strong trades hold.

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

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Port Allen
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Fri -- 03:01 AM HST     Moonrise
Fri -- 06:05 AM HST     Sunrise
Fri -- 06:38 AM HST     -0.20 feet Low Tide
Fri -- 12:44 PM HST     0.97 feet High Tide
Fri -- 02:56 PM HST     Moonset
Fri -- 06:25 PM HST     0.22 feet Low Tide
Fri -- 07:05 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Port Allen, Hanapepe Bay, Kauai Island, Hawaii, Tide feet

Nawiliwili
Click for Map
Fri -- 03:01 AM HST     Moonrise
Fri -- 06:04 AM HST     Sunrise
Fri -- 06:35 AM HST     -0.24 feet Low Tide
Fri -- 12:53 PM HST     1.04 feet High Tide
Fri -- 02:55 PM HST     Moonset
Fri -- 06:22 PM HST     0.26 feet Low Tide
Fri -- 07:04 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Nawiliwili, Hawaii (2), Tide feet

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