Sunday 9 27 20 morning call

Please send an email to the Mayor's office: Mayors.Office@co.maui.hi.us to ask to open the beach parks before 7am as it used to be before Covid.

Deneb's bottom turn to illustrate the waves at Hookipa yesterday morning. 

4am significant buoy readings and discussion.
South shore
Barbers

1.6ft @ 15s from 195° (SSW)

1.5ft @ 18s from 191° (SSW)

Lanai

2.5ft @ 15s from 185° (S)

1.7ft @ 20s from 177° (S)

Extremely good numbers at the buoys with two distinct swells, the new very long period energy comes from this fetch that Pat Caldwell described like this: 

The second pulse was created by a low-pressure system that dropped to
948 mb to the S to SE of New Zealand 9/19-20 with seas 30-40 feet
aimed at the Americas. The wide, long fetch gives better odds for
angular spreading to deliver surf in Hawaii. The onset stage is due
Saturday 9/26 from 180-200 degrees. The American Samoa buoy showed
18-22 second forerunners 9/23-24. This buoy location is west of the
predicted primary swath, so any energy registered increases the odds
for Hawaii to receive the event.

This event should slowly build into Sunday 9/27 from 180-200 degrees,
with the combo of sources making above average surf 9/27.  Heights
should hold above average into Monday 9/28 from the same direction,
then slowly drop to background by 9/30.

Below is the collage of the maps of Sept 19, 20 and 21. I put an arrow on the fetch, which is so aiming at South America that I originally didn't even circle it in blue. The angular spreading of such a fetch will be extremely inconsistent, so it's a good thing to have a solid background of 2.5ft 15s, as I guess the 20s sets will be many minutes apart.

Check the Lahaina webcam if interested, for size, conditions and consistency. Conditions should be good all morning.

North shore
N
3.7ft @ 10s from 32° (NE)

Pauwela

2.5ft @ 7s from 59° (ENE)

2.5ft @ 9s from 351° (N)

1.8ft @ 6s from 51° (ENE)

1.5ft @ 11s from 350° (N)

Swell is almost gone and it's going to keep declining all day. Hookipa will still have some small waves.

Wind map at noon (the other ones can be found at link n.-2 of GP's meteo websites list in the right column).

Fetches map (circles legend: red: direct aim, blue: angular spreading, black: blocked, yellow: apparent direct aim, but out of the great circle ray map, so not 100% sure).
North Pacific (about 4 days travel time from the NW corner of the North Pacific):

South Pacific (about 7 days travel time from east/west of New Zealand):

Morning sky.