7am OBS, Saturday May 11th
Sunny morning w/ isolated heavy rain showers possible across the islands later today. Light and variable winds becoming light trades by this evening.. Flood Watch for all Islands.
Fun SSW. Fun NNW. Small East trade swell. Call 596-SURF: 7a, noon, 3pm; plus, the 5p (recap-forecast).
North Shore:
Up & Holding 10 sec NNW. Mostly clean conditions but variable winds could lead to periods of lite onshore flow. Sunset 2-3'+; Rocky Pt 2-3'; Pipe 1-2'+; Chuns 1-3'; Laniakea 2-3'+; Ali'i Beach Park 1-2'+. Mostly cloudy.West:
Dropping slow 15 sec SSW + Up & Holding 10 sec NNW. Clean and glassy w/ lite offshores expected all day. Makaha is 2-3', breaking behind the reef. Partly cloudy skies.Town:
Dropping slow 15 sec SSW. Surf's clean and glassy w/ lite offshores expected all day. Waikiki reefs are 1-3', Kaisers-Rockpiles to Ala Moana to Kewalos are 2-3' very occ. 4'. Long lulls between sets and mostly sunny skies.Diamond Head:
Dropping slow 15 sec SSW. Clean conditions expected all day. Surf's 2-3' very occ 4'. Long lulls between sets and mostly sunny skies.Sandy's:
Dropping slow 15 sec SSW + tiny Trade swell. Mostly clean conditions with the lite east trades. Full Pt./Half Pt. 2-3' occ. 4'. Shore break's also fun at 2-3'+ under scattered clouds.East Makapu'u:
Holding 7 sec ENE trade swell + some North wrap. Very slight bump due to lite trades. Surf's 1-2' on the left side of the bay. Keiki's is mostly flat. Scattered clouds.Winds
5-15+mph East Trade
5-15mph East Trade
5-10mph NE Trade
5-15mph ENE Trade
20 mph later
10-20mph ENE Trade
North
Primary
Dropping 9s NHaw: 1-2+
Face: 1-3+
Secondary
Rising Later 14s NNWHaw: 0-1.5
Face: 0-2
Fair to good
Primary
Up & Rising 15s NNWHaw: 2-4+
Face: 3-7+
Secondary
Dropping 10s NHaw: 0-1
Face: 0-1.5
Good
Primary
Dropping 12s NWHaw: 2-3 occ +
Face: 3-5 occ +
Secondary
None NONEHaw: 0
Face: 0
Good
Primary
Dropping 11s NWHaw: 1-2+
Face: 1-3+
Secondary
None NONEHaw: 0
Face: 0
Good offshores
Primary
Rising 13s NNWHaw: 1-2+
Face: 1-3+
Secondary
Dropping 10s NWHaw: 0-1.5
Face: 0-2
Fair to good
West
Primary
Dropping 14s SSWHaw: 1-2 occ 3
Face: 2-4 occ 5
Secondary
Dropping 9s NHaw: 0-1.5
Face: 0-2
Good
Primary
Up & Rising 15s NNWHaw: 1-3
Face: 2-5
Secondary
Dropping Slow 13s SSWHaw: 1-2
Face: 1-3
Good
Primary
Dropping 12s NWHaw: 1-2 occ 3
Face: 2-4 occ 5
Secondary
Rising Slow 19s SSWHaw: 1-2
Face: 1-3
Good
Primary
Up & Rising 16s SSWHaw: 1-2+
Face: 1-3+
Secondary
Dropping 11s NWHaw: 1 occ 2
Face: 1-2 occ 3
Fair to good
Primary
Rising 13s NNWHaw: 0-2
Face: 0-3
Secondary
Up & Rising 20s SSWHaw: 1-2
Face: 1-3
Fair to good
South
Primary
Dropping 14s SSWHaw: 2-3+
Face: 3-5+
Secondary
None NONEHaw: 0
Face: 0
Good
Primary
Dropping Slow 13s SSWHaw: 1-3
Face: 2-5
Secondary
Rising Slow 18s SSWHaw: 1 occ 2
Face: 1-2 occ 3
Fair to good
Primary
Rising Slow 19s SSWHaw: 1-2 occ 3
Face: 2-4 occ 5
Secondary
None NONEHaw: 0
Face: 0
Fair to good
Primary
Up & Rising 16s SSWHaw: 2-3 occ +
Face: 3-5 occ +
Secondary
Rising Slow 22s SSWHaw: 1-2 occ +
Face: 1-3 occ +
Fair to good
Primary
Up & Rising 20s SSWHaw: 1-2+
Face: 1-3+
Secondary
Dropping 15s SSWHaw: 1-2+
Face: 1-3+
Good
5' late afternoon
east
Primary
Holding 6s ENEHaw: 1-2
Face: 1-3
Secondary
None NONEHaw: 0
Face: 0
Mushy
Primary
Rising 7s ENEHaw: 1-2
Face: 1-3
Secondary
None NONEHaw: 0
Face: 0
Mushy
Primary
Up & holding 7s ENEHaw: 1-2+
Face: 1-3+
Secondary
None NONEHaw: 0
Face: 0
Typical
Primary
Holding 7s ENEHaw: 1-2+
Face: 1-3+
Secondary
None NONEHaw: 0
Face: 0
Mushy
Primary
Holding 7s ENEHaw: 1-2+
Face: 1-3+
Secondary
None NONEHaw: 0
Face: 0
Typical
Current Swells:
Sunday 05/12Primary: Dropping 14s SSW surf @2-3+
Secondary: Dropping 9s N surf @1-2+
Marine Warnings:
Sunday 05/12Trend: None
Sailing Report:
Sunday 05/12Trend: Fair as light E to ESE winds prevail
Diving Report:
Sunday 05/12North shores: Fair to good due to tiny NNW swell and lite trades. Best bet: deeper dives; West shores: Good for most zones due to tiny NNW and small SSW swells and lite offshores; better for deeper dives. South shores: Fair-good overall for but a new moderate/large SSW swell is filling in. Lite trades but best bet are deeper dives. East shores: Fair due to small surf and lite onshores.
Oahu
Maui
Kauai
Big Island
Weather
Surf Advisory and Warning CriteriaLocation/shoreline Advisory Warning
North-Facing Shores- 15 Feet faces (8' Local) 25 Feet faces (15' local)
West-Facing Shores - 12 Feet (7' local) 20 Feet (12' local)
West-Facing- Big Is.- 8 Feet (4'+ local) 12 Feet (7' local)
South-Facing Shores- 8 Feet (4'+ local) 15 Feet (8' local)
East-Facing Shores- 8 Feet (4'+ local) 15 Feet (8' local)
Big Picture
INACTIVE.Get the latest on the tropics at www.hurricanes.gov
The Central Pacific Hurricane Center outlook for the 2017 Central Pacific Hurricane Season calls for 5 to 8 tropical cyclones to either develop or cross into the Central Pacific with a 40% chance for an above-normal season, a 40% chance for a normal season, and a 20% chance for a below-normal season. An average season has 4 to 5 tropical cyclones, which include tropical depressions, tropical storms, and hurricanes.
A tropical depression forms when a low-pressure area is accompanied by thunderstorms that produce a circular wind flow with maximum sustained winds below 39 mph. An upgrade to a tropical storm occurs when cyclonic circulation becomes more organized and maximum sustained winds gust between 39 mph and 73 mph. A tropical storm is then upgraded into Category 1 hurricane status as maximum sustained winds increase to between 74 mph and 95 mph. (The highest classification in the scale, Category 5, is reserved for storms with winds exceeding 156 mph).
Tropical cyclones go by many names around the world, and the terminology can get confusing. Once a tropical cyclone strengthens to the point where it has gale-force winds—39 mph or greater—it becomes a tropical storm. A storm that reaches tropical storm strength usually gets its own name to help us quickly identify it in forecasts and warnings. Once a tropical storm begins producing sustained winds of around 75 mph, we call the storm a typhoon in the western Pacific near Asia and a hurricane in the oceans on either side of North America. A “typhoon” and a “hurricane” are the same kind of storm, they just go by different names…it’s only a matter of geography.
NWS criteria for High Surf Advisories & Warnings.
In coordination with civil defense agencies & water safety organizations in Hawai`i, the NWS uses the criteria below for the issuance of High Surf Advisories & Warnings in coordination with civil defense agencies & water safety organizations in Hawai`i.
All surf height observations & forecasts are for the full face surf height, from the trough to the crest of the wave.
Advisory and Warning Criteria Location
Warning North-Facing Shores 15 Feet 25 Feet
West-Facing Shores - Remaining Islands 12 Feet 20 Feet
West-Facing Shores - Big Island 8 Feet 12 Feet
South-Facing Shores 8 Feet 15 Feet
East-Facing Shores 8 Feet 15 Feet
'Travel Time' Buoy 51101 to Waimea Buoy. Distance: 269 nautical miles (~310 miles). Angle: 307 deg
Wave Wave Wave Depth Wave Direction (deg)----------
Period Length Speed Shallow 295, 305, 315, 325, 335, 345, 355
(s) (ft) (nm/h) (ft) Travel Time (hours)----------
10sec. 512. 15. 256. 17.3, 17.7, 17.6, 16.9, 15.7, 14.0, 11.9
12sec. 737. 18. 369. 14.5, 14.8, 14.6, 14.0, 13.0, 11.6, 9.9
14sec. 1003. 21. 502. 12.4, 12.7, 12.5, 12.0, 11.2, 10.0, 8.5
16sec. 1310. 24. 655. 10.8, ,1 1.1, 11.0, 10.5, 9.8, 8.7, 7.4
18sec. 1658. 27. 829. 9.6, 9.8, 9.8, 9.4, 8.7, 7.8, 6.6
20sec. 2047. 30. 1024. 8.7 8.9 8.8 8.4 7.8 7.0 5.9
22sec. 2477. 33. 1239. 7.9 8.1 8.0 7.7 7.1 6.3 5.4
24sec. 2948. 36. 1474. 7.2 7.4 7.3 7.0 6.5 5.8 4.9
Tropical Storms - wind 39-73 mph (34-63 kt)
Category 1 - winds 74-95 mph (64-82 kt)
Category 2 -winds 96-110 mph (83-95 kt)
Category 3 -winds 111-130 mph (96-113 kt)
Category 4 - winds 131-155 mph (114-135 kt)
Category 5 -winds 156 mph and up (135+ kt)
Please visit the Central Pacific Hurricane Center website at www.weather.gov/cphc for the most recent bulletins.
ENSO is a single climate phenomenon, it has three states or phases. The two opposite phases, “El Niño” and “La Niña,” require certain changes in both the ocean and the atmosphere because ENSO is a coupled climate phenomenon. “Neutral” is in the middle of the continuum. The MJO (Madden-Julian Oscillation) is an eastward moving disturbance of clouds, rainfall, winds, and pressure that traverses the planet in the tropics and returns to its initial starting point in 30 to 60 days, on average, unlike ENSO which is stationary. In a nutshell, more active means more surf.
Kelvin wave (A Kelvin wave is a wave in the ocean or atmosphere that balances the Earth's Coriolis force against a topographic boundary such as a coastline, or a waveguide such as the equator. A feature of a Kelvin wave is that it is non-dispersive, i.e., the phase speed of the wave crests is equal to the group speed of the wave energy for all frequencies. This means that it retains its shape as it moves in the alongshore direction over time.)
Premium snn Membership
Join the Premium SNN Membership and enjoy 10 Day Forecasts, All Webcams Page, 5 Days Webcams Archives, Help Surfrider & Access Surf with your partnership.
All for just $8/month Sign Up Now! 1st Month is FREE
5,460
likes
550
followers
98
subscribers
449
followers