Hawaiian Marine Products

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Marine Product Dissemination Information

Marine Weather Message in Effect for the Coastal Waters

Marine section from the Area Forecast Discussion
issued at: Jan 19, 2017 4:00 AM HST

The west-northwest swell is expected to peak early today, then lower gradually later today and tonight. With the more westerly direction of this swell, high surf will also reach west- facing shores of The Big Island today. Another large northwest swell is expected to arrive tonight and Friday with advisory level surf expected. This swell will lower gradually over the weekend. A short period north-northeast swell is expected over the weekend behind a cold front moving across the area. The swell will gradually swing around to the east early next week. Advisory level surf is likely along north and east facing shores with this new swell. Another large northwest swell is expected for next Tuesday and Wednesday.

A Small Craft Advisory is presently posted for most Hawaiian coastal waters, mainly due to seas associated with the new west- northwest swell. Winds around portions of The Big Island are also reaching Small Craft Advisory levels, though they are expected to drop off today. Winds behind a cold front moving across the chain this weekend will exceed advisory criteria and could reach Gale Warning levels across some areas. Also, seas will remain rather high through the weekend and into early next week.

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The Marine Radiofax Charts for Station KVM-70 are now available via E-mail or FTP. Click here for more details on the charts available. For information on FTPMAIL click here.

Graphic Forecasts
for Hawaiian Islands and surrounding coastal waters
Pacific Streamline Analysis
(130E-110W,30S-30N)
tif Latest 00Z 06Z 12Z 18Z  
gif Latest 00Z 06Z 12Z 18Z Loop
North Pacific Surface Analysis
(130E-110W,EQ-60N)
From the Unified Surface Analysis
gif Latest 00Z 06Z 12Z 18Z Loop
Pacific Surface Forecast
(130E-110W,30S-50N)
gif 12Z Charts 24 hr 48 hr 72 hr
gif 00Z Charts 24 hr 48 hr 72 hr
Pacific Wind Wave
Analysis and Forecasts
12Z Charts
tif Analysis 24 hr 48 hr 72 hr
gif Analysis 24 hr 48 hr 72 hr
00Z Charts
tif Analysis 24 hr 48 hr 72 hr
gif Analysis 24 hr 48 hr 72 hr
Pacific Significant Cloud Features
(160E-110W, 30S-50N)
gif Latest 03Z 15Z
Pacific Sea Surface
Temperature Analysis

satellite-derived (updated twice weekly)
Symbols & Test Chart (gif)
Symbols & Test Chart (TIF)

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About the Marine Program

Routine forecast are issued for the Hawaiian Coastal Waters, the Offshore Waters, and High Seas. Coastal Waters are within 40 nautical miles of the main Hawaiian islands. The Offshore area extends from this 40 nautical mile mark to 240 nautical miles of the main Hawaiian islands. The High Seas forecasts are issued for an area that covers approximately 15,000,000 square miles, extends as far north as 30N, and as far south as 25S, and between 120W south of the equator and 140W north of the equator to 160E.
Marine Area of Responsibility Map
Map of Marine Zones

The marine forecasts issued are based on marine observations and model data. Marine observations include buoy and ship reports. Ship reports are invaluable to the NWS, and are reported through the U.S. Voluntary Observing Ship Project. If you are a mariner, please consider joining the nearly 1,000 volunteer ships from around the world that observe the weather at their location.