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Marine Weather Message in Effect for the Coastal Waters

Marine section from the Area Forecast Discussion
issued at: Apr 24, 2014 3:30 PM HST

A small craft advisory is in effect for all waters in anticipation of strengthening winds and building combined seas through Saturday afternoon. Northeasterly winds will reach their minimum speeds late Sunday or Monday as the ridge to our north weakens, and then increase again by the middle of next week.

Persistent trade winds will build seas, producing rough surf near the advisory level along east-facing shores by Friday. Increasing seas also contribute to the need for the small craft advisory. Seas will diminish with the winds late Saturday and Sunday.

A northwest swell will produce below-advisory surf along exposed shores of the smaller islands today. The swell will drop Friday and Saturday, but a small reinforcing northwest swell may arrive late Sunday into Tuesday.

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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 the help file 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 00Z Charts 24 hr 48 hr 72 hr
gif 12Z Charts 24 hr 48 hr 72 hr
Pacific Wind Wave
Analysis and Forecasts
00Z Charts
tif Analysis 24 hr 48 hr 72 hr
gif Analysis 24 hr 48 hr 72 hr
12Z 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

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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.