Sunrise 5:52 AM   Sunset 6:53 PM Moonrise 3:28 AM   Moonset 3:46 PM

  Print   HELP   Reset   Save   Recall

PHZ119 Maalaea Bay- 311 Am Hst Sat May 4 2024
.small craft advisory in effect through early Monday morning - .
Today - North winds to 25 knots, rising to 30 knots this afternoon. Seas 3 to 4 feet. Wave detail: north 4 feet at 4 seconds. Tonight - North winds to 25 knots. Seas 3 to 4 feet. Wave detail: north northeast 4 feet at 4 seconds. Isolated showers. Sunday - North winds to 25 knots. Seas 3 to 4 feet. Wave detail: north northeast 3 feet at 3 seconds. Isolated showers. Sunday night - North northeast winds to 25 knots. Seas to 3 feet. Wave detail: north northeast 3 feet at 4 seconds and south 3 feet at 17 seconds. Isolated showers. Monday - North northeast winds to 25 knots. Seas to 3 feet. Wave detail: south 3 feet at 16 seconds. Isolated showers in the morning. Monday night - North northeast winds to 25 knots, easing to 20 knots after midnight. Seas to 3 feet. Wave detail: south 3 feet at 15 seconds. Tuesday - North northeast winds to 20 knots. Seas to 3 feet. Isolated showers. Wednesday - North northeast winds to 20 knots. Seas to 3 feet. Scattered showers.

PHZ100 311 Am Hst Sat May 4 2024
Synopsis for hawaiian coastal waters - Strong high pressure will remain nearly stationary far north of the islands through Monday, then move east.

FXHW60 PHFO 041336 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 336 AM HST Sat May 4 2024

SYNOPSIS
Breezy trade winds will continue into Monday as a high pressure system remains anchored far north of the state. An upper level low northwest of Kauai will slowly drift across the island chain through Monday enhancing shower activity mainly over windward and mountain areas of each island. By Tuesday the disturbance aloft weakens and drifts northeast of the state, briefly decreasing shower activity. A low level cloud band will ride into the islands on the trade winds with support from an upper level trough from Wednesday to Thursday, increasing shower trends over all islands.

DISCUSSION
Satellite imagery water vapor channel continues to show an upper level low roughly 700 miles to the west-northwest of Kauai this morning. An upper level trough is also evident over the islands enhancing trade wind showers as shown on island radar. The subtropical jet stream flows from west to east over the Big Island this morning, and this jet stream will slowly drift north over the next few days.

A 1030 mb high pressure center and subtropical ridge will remain anchored over the Central Pacific basin, far north of the Hawaiian islands through the weekend. This system will produce breezy easterly trade winds across the Hawaii region into Monday. Trade wind speeds will slowly decrease to moderate levels from Monday into Tuesday as the high pressure center drifts eastward away from the island chain and a long wave trough moves into the Central Pacific. Easterly trade winds will continue to blow at moderate levels through Friday.

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 and mountain 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.

AVIATION
Breezy easterly trade winds will persist through the weekend, with clouds and showers favoring windward and mauka locations.
MVFR CIGs /VSBYs in showers are possible over windward areas, especially overnight through the early morning periods. Elsewhere, VFR conditions will prevail with an occasional shower making it to leeward sections of the smaller islands.

AIRMET Sierra is in effect for tempo mountain obscuration for windward portions of each island. This may persist through the early morning hours before conditions improve.

AIRMET Tango is in effect for mod turb below 9000 feet downwind of island terrain, which will continue through the weekend.

MARINE
Consolidating high pressure far N of the islands will support strong E trade winds into Monday, with island terrain accelerating winds to near-gale force in the windier channels. The high will move E thereafter, leading to a gradual easing in trade wind speeds by the middle of next week. A Small Craft Advisory (SCA)
for all waters will remain posted through at least Sunday. A disturbance aloft will allow for the development of a few heavier showers the next couple of days, producing periods of gusty winds and reduced visibility.

Combined seas increased to near 10 feet at several of the near- shore PacIOOS buoys overnight, mostly due to an increase in short- period wind waves. These wind waves arriving along E facing shores will result in rough and choppy surf for at least the next several days. Also, a new medium- to long-period NNW swell will peak near 4 feet today. This swell will gradually diminish Sunday, but another relatively small, moderate-period NW swell is expected Monday and Tuesday.

Elsewhere, the storm track in the S hemisphere recently became favorable for the generation of Hawaii-bound S swell, with pulses of swell arriving on-and-off for at least the next week. The first of these long-period S swells is expected to arrive later this weekend and early next week, with peak surf heights remaining below High Surf Advisory (HSA) heights, although later swells may be large enough to warrant a HSA.

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

toggle option: (graph/table)

Lahaina
Click for Map
Sat -- 12:13 AM HST     1.66 feet High Tide
Sat -- 03:27 AM HST     Moonrise
Sat -- 05:54 AM HST     Sunrise
Sat -- 06:47 AM HST     -0.22 feet Low Tide
Sat -- 01:27 PM HST     1.67 feet High Tide
Sat -- 03:45 PM HST     Moonset
Sat -- 06:52 PM HST     Sunset
Sat -- 07:18 PM HST     0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Lahaina, Maui Island, Hawaii, Tide feet

Kahului
Click for Map
Sat -- 03:26 AM HST     Moonrise
Sat -- 05:53 AM HST     Sunrise
Sat -- 06:23 AM HST     -0.05 feet Low Tide
Sat -- 12:44 PM HST     1.74 feet High Tide
Sat -- 03:44 PM HST     Moonset
Sat -- 06:27 PM HST     0.43 feet Low Tide
Sat -- 06:52 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Kahului, Kahului Harbor, Hawaii (2) (expired 1999-12-31), Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Please run setup again to find your radar station. Click HERE.