Saturday, August 03, 2019

Saturday 8 3 19 morning call

Seems like all that Erick brought was a little bit of rain and this incredible sunset photographed by Jimmy Hepp. Explanation of the lack of waves below in the discussion.

2am significant buoy readings and discussion.
South shore
1.5ft @ 13s from 188° (S)
0.8ft @ 18s from 196° (SSW)
1.6ft @ 11s from 182° (S)
1.2ft @ 16s from 193° (SSW)

Here's what I think happened with Erick's southerly swell. As posted yesterday, the SE buoy (yellow pin in the picture) went up to 15ft 10 from 115-120 around 11am. At 10s, it would have taken 18 hours from there to Hana, so it probably was there in the wee hours yesterday. I saw a picture of Olomana Eleogram on a big wave that could have been Hamoa, but I'm not 100% sure. Either it hit Hana or not, that energy obviously would have never made to either the north or the south shores.

When later on the storm moved on the other side of the Big Island (yellow arrows) it just didn't have enough of a strong fetch anymore to generate the waves that would have hit the south shore (passing west of Big Island) yesterday.

But, as you can see, there's small southerly long period energy at both buoys (nothing to do with Erick), so there might be small and very inconsistent sets. Below is the collage of maps of July 26, 27 and 28. Fetch position and direction at the buoys don't match, but that would not be the first time it happens. Check the Lahaina webcam, it's too dark at the moment.

North shore
5.2ft @ 7s from 85° (E)
4.2ft @ 9s from 113° (ESE)
1ft @ 12s from 131° (SE)

5.4ft @ 8s from 98° (E)
1.3ft @ 14s from 125° (ESE)

The leftover ESE energy won't make it to the north shore, so today only the regular 7-8s windswell again. Hookipa will possibly have small waves, bigger on eastern exposures.

Wind map at noon.

North Pacific has a strong (thanks to Flossie's added pressure gradient) windswell fetch.

South Pacific's strong fetch in the Tasman Sea is even bigger today, unfortunately the section circled in black should be blocked by New Zealand.

Morning sky.

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