NWS criteria for High Surf Advisories (first number) & Warnings (second number).
All surf height observations & forecasts are for full ‘face’ surf height, or ‘trough to the crest’ of the wave.
North-Facing Shores 15 Feet and 25 Feet
West-Facing Shores – Remaining Islands 12 Feet and 20 Feet
West-Facing Shores – Big Island 8 Feet and 12 Feet
South-Facing Shores -(Advisory) 8 Feet and (warning) 15 Feet
East-Facing Shores – 8 Feet and 15 Feet
Get the latest Central Pac Hawaii HERE
For the SNN Buoys ‘per shore’ displayed HERE
Note: Spectral density graph in the SNN Buoy Page HERE can show ‘slivers’ of forerunners that initial text readings of new swells which often do not ‘show’ till later on written/text buoy updates.
Also, note the vertical graph is not ‘wave height’ rather its a measure of wave energy in hertz (frequency or cycles/sec) for the whole ‘band’ (the distribution of power/period in the total wave energy field/spectrum).
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