Category Archives: Meteorology

What does a “Gale Warning” mean?

The National Weather Service has developed a multi-tier concept for forecasting hazardous weather which includes outlooks, watches, warnings and advisories.  Below are the visual day flag and nighttime light signals that warn of rough weather.  NOAA discontinued using the flags in … Continue reading

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URGENT “Notice to Mariners” – Changes to NOAA marine products effective March 7th, 2018

By Lee Chesneau Lee is a senior marine meteorologist, lecturer, & a graduate from the University of Wisconsin (Madison).   Lee has had a distinguished career with NOAA’s National Weather Service (NWS), NOAA Satellite Service (NESDIS), U.S. Navy Ship Routing Officer … Continue reading

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High Wind and Wave Events Crossing the Gulf Stream

Crossing the Gulf Stream where ocean currents can exceed 2 knots takes some skill and if you try in under certain weather conditions, could be dangerous for any size vessel.  High wind and wave events can occur under certain conditions … Continue reading

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What does a Small Craft Advisory mean?

The National Weather Service has developed a multi-tier concept for forecasting hazardous weather which includes outlooks, watches, warnings and advisories. An outlook is issued to indicate that a hazardous weather or hydrologic event may occur over the next several days. … Continue reading

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Omega Block developing over eastern North Atlantic

The current North Atlantic upper-air pattern is developing  an Omega block over the northeastern North Atlantic. This pattern gets its name because this upper air pattern looks like the Greek letter omega (Ω). Omega blocks tend to have two cut-off … Continue reading

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What is the risk of encountering a tropical storm or hurricane during your Caribbean cruise?

                      Tropical cyclones are storms that originate over tropical and subtropical waters during the summer and fall seasons and are classified as follows: Tropical Depression:A tropical cyclone with maximum sustained … Continue reading

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Slowing Sea Level Rise Projections

In recent years there have been several projections regarding sea level rise, including claims that the oceans could rise up to 10 feet by 2100.  It is time to consider just how much weight we should give these projections as … Continue reading

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Stormy Eastern North Atlantic

  An intense storm low over the eastern North Atlantic with storm to hurricane force winds and seas to 14 meters (46 feet) will turn northeast then northward passing just west of Ireland.  A rapidly deepening low will develop over … Continue reading

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West Pacific stormtracks may delay westbound shipping

Strong Arctic high pressure building over Siberia eastward will suppress stormtracks far to the south across the western North Pacific during the next several days.  This will likely result in delays to west-bound traffic from the Panama Canal to Far … Continue reading

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Strong High Pressure block building over Bering Sea and Gulf of Alaska

Just as there is currently a strong blocking high pressure over the northeastern North Atlantic, so is there a building high block over the Bering Sea and Gulf of Alaska shunting lows far to the south in the eastern North … Continue reading

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