4-6+ foot
4-6+ foot
1-3 foot
5-7 foot

The elevated north-northeast swell is now on the down trend. It has subsided enough to where the high surf advisory is canceled for the north facing shores. Advisory level surf, however, still continues for the east facing shores. The surf should be below advisory level by noon to where the advisory can be lowered for the east facing shores. As of 3 am HST, the near shore buoys are coming in at 5 to 6 feet with a 12 to 13 second period.

Beginning Tuesday afternoon, the forerunners of another large north-northeast to northeast swell are on tap to reach the islands. Surf heights will likely reach advisory levels for the north and east facing shores between Wednesday and Thursday night. This swell is quite similar to the north-northeast swell that is now fading. Also on Tuesday, a 5 foot west-northwest (300 degrees) swell with a period of around 14 seconds is set to arrive as well. A small background northwest swell will fill in the rest of next week. Like-wise for the south facing shores where a series of small swells from primarily the southwest reaches the islands. Two long period pulses of 18 seconds each, will arrive Monday afternoon and again Wednesday night through Thursday.

With the north-northeast swell coming down, and the trades being more moderate, there is no Small Craft Advisory in effect. We do not anticipate SCA until the middle of next week when stronger trades return to most of the marine zones. The strong trades are from a new surface high passing far north of the islands. Coupled with the large north-northeast swell, it means the SCA will not only cover the winds but the seas as well.

Locally poor visibility in brief downpours is possible over the weekend as incoming moisture is enhanced by a mid-level trough passing over the islands.

Hawaii Wave Height Model

Tide Predictions

Low tide at Kahului was 0.7 foot at 2:00 PM early this afternoon, rising to a high of 2.2 foot at 2:00 PM early this afternoon, then dropping to a low of 0.6 foot at 2:00 PM early this afternoon, before once again rising to a high of 1.3 foot at 2:00 PM early this afternoon

The sunrise was at 06:33 am this morning and will set at 05:46 pm this evening. The Moon is currently 23 days old, and is in a Last Quarter phase. The next Waning Crescent will occur at 11:42 AM on Saturday, November 18th.

Hawaii Wind Report

Maui Weather

75°/76°
Wind: N at 22 mph
Sunrise: 6:40 AM
Sunset: 5:43 PM
current observations as of 3pm November 20th, 2017

Weather Outlook for Saturday, 11th November 2017

Summary

A surface ridge will persist north of the islands through early next week, providing trade winds to the area. A trough aloft from the northwest passing across the state in the next couple of days will bring wetter weather. A strong surface high will move to far north of the islands by the middle of next week, with strengthening trade winds for the area.

Detailed Discussion

Gentle to locally breezy easterly trade winds continue over the islands early this morning as high pressure ridge persists north of the islands. An organized area of low clouds has reached the eastern islands overnight and is spreading west early this morning. Early morning Hilo sounding revealed a rather moist airmass, with low level moisture extending to over 10 thousand feet and no trade wind inversion. Since the low clouds have not reached Kauai at time, early morning Lihue sounding continues to be much drier with low level moisture extending to about 6 thousand feet. That will change as the moisture spreads west. Batches of high clouds are moving over the islands in the meantime, and will keep skies a little more cloudy today.

A trough aloft from the northwest will be passing across the area through the next couple of days. The cold air aloft associated with the trough will make the airmass in the island vicinity more unstable which will allow clouds to build higher, leading to more active showers. Given the increased moisture in the island vicinity, expect wet trade wind weather for the islands today, with much of the showers affecting most windward and mauka sections. The atmosphere could also become unstable enough allowing locally heavy showers to develop, and cold enough aloft for frozen precipitation to develop over the summits on the Big Island later today.

The bulk of the moisture will pass west of the islands by Sunday, while the trough aloft shifts east early next week. Do expect a little less showers for the state on Sunday and Monday, though moderate to even locally heavier showers are not out of the question. Latest forecast solutions still have areas of moisture reaching the islands Tuesday and Wednesday, and this will probably amount to more passing showers for the area. Forecast models also hint another trough aloft from the north may deepen slightly then pass over the state toward the middle of next week. Thus airmass in the island vicinity may stay somewhat unstable. A strong surface high is expected to move to far north of the area by the middle of next week as well, bringing a boost to the trade winds over the islands. Looks like the wetter trade wind weather may prevail over the area for much of next week.

Central Valley (Kahului, Spreckelsville):

Cloudy with scattered showers. Lows 61 to 67. Northeast winds 10 to 15 mph shifting to the north after midnight. Chance of rain 50 percent.

Leeward West (Lahaina, Ka`anapali):

Cloudy. Numerous showers in the evening, then scattered showers after midnight. Lows around 67. East winds 10 to 15 mph. Chance of rain 70 percent.

Windward West (Wailuku, Waiehu):

HIGH SURF ADVISORY IN EFFECT UNTIL NOON HST TODAY. Cloudy. Frequent showers in the morning, then numerous showers early in the afternoon. Frequent showers late in the afternoon. Locally heavy rainfall possible. Highs 64 to 81. East winds 10 to 15 mph with gusts to 30 mph. Chance of rain 90 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF ADVISORY IN EFFECT UNTIL NOON HST TODAY. Occasional showers. Locally heavy rainfall possible. Highs around 79 at the shore to around 63 at 5000 feet. East winds 10 to 15 mph. Gusts up to 35 mph until late afternoon. Chance of rain near 100 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Cloudy. Scattered showers until early morning, then isolated showers early in the morning. Lows around 67 at the shore to around 56 upcountry. East winds up to 10 mph until early morning becoming light. Chance of rain 50 percent.

Haleakala Summit

Cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows around 49 at the visitor center to around 44 at the summit. East winds 10 to 15 mph. Chance of rain 50 percent.

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