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Marine weather forecasts by various weather organizations can be traced back to the sinking of the Royal Charter in 1859 and the RMS Titanic in 1912. The wind is the driving force of weather at sea, as wind generates local wind waves, long ocean swells, and its flow around the subtropical ridge helps maintain warm water currents such as the ...
The National Weather Service issues a similar high wind warning (Specific Area Message Encoding code: HWW) for high winds on land. The criteria vary from place to place; however, in most cases, the warning applies to winds of 40 miles per hour (64 km/h) to 73 miles per hour (117 km/h) for at least 1 hour; or any gusts of 58 miles per hour (93 km/h) to 114 miles per hour (183 km/h) on land.
The Fleet Numerical Meteorology and Oceanography Center (FNMOC) is an echelon IV component of the Naval Meteorology and Oceanography Command (NMOC), which provides worldwide meteorological and oceanographic data and analysis for the United States Navy and strategic allies of the United States.
It provides analysis and real-time forecast guidance (1–16 days) on marine meteorological, oceanographic, and cryospheric parameters over the global oceans and coastal areas of the US. Products include: Ocean Waves; Sea ice; Marine Meteorology. Marine Winds - Satellite Remote Sensing; Coastal Ocean Visibility; Open Ocean Visibility; Vessel Icing
A special marine warning (SAME code SMW) is a warning issued by the U.S. National Weather Service for potentially hazardous marine weather conditions usually of short duration (up to 2 hours) producing sustained marine thunderstorm winds or associated gusts of 34 knots or greater; or hail 3/4 inch or more in diameter; or waterspouts affecting areas included in a coastal waters forecast, a ...
Lake wind advisory NPW – Sustained wind speeds of 20 to 29 miles per hour (32 to 47 km/h) are forecast to persist for one hour or longer on area lakes that may cause hazards for maritime travel; wind speeds meeting advisory criteria may vary depending on the county warning area. The usage of this product is locally determined by each Weather ...
The forecast begins by listing areas with gale warnings, followed by a general synopsis of pressure areas, then a forecast for each individual sea area covering wind speed and direction, precipitation, and visibility. Extended forecasts at 00:48 and 05:20 include information from coastal weather stations and an inshore waters forecast.
MAFOR, an abbreviation of MArine FORecast, is a North American code used in the transmission of marine weather forecasts to compress a volume of meteorological and marine information into shorter code for convenience during radio broadcasting. The MAFOR forecast usually supplies the period of validity for the forecast, future wind speed and ...