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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 ...
A Hazardous Seas Warning is issued by the National Weather Service of the United ... MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT FRI OCT 3 ...
Marine weather statement MWS – The equivalent of a special weather statement at sea, indicating potentially hazardous marine conditions. Special marine warning SMW – A warning to mariners of short-duration hazardous weather conditions (lasting up to two hours) including thunderstorms or squalls with wind gusts of 34 knots (39 mph; 63 km/h ...
PDS Special marine warnings are issued by the National Weather Service to inform mariners of weather conditions that present a considerable threat to life and property. On April 19, 2018, the Baltimore/Washington, D.C. forecast office upgraded a special marine warning to PDS status as a gust front approached Chesapeake Bay. [10]
Hazardous seas warning; Hazardous seas watch; Hazardous weather outlook; Heat advisory; Heavy freezing spray warning; Heavy freezing spray watch; Heavy snow warning; History of Atlantic hurricane warnings; Hong Kong rainstorm warning signals; Hong Kong tropical cyclone warning signals; HURCON; Hurricane force wind warning; Hurricane local statement
The National Weather Service issues a storm warning for higher winds of 48 knots (89 km/h; 55 mph) to 63 knots (117 km/h; 72 mph) at sea. In the event of a tropical cyclone, however, a tropical storm warning replaces both the gale warning and the storm warning. In this type of situation, the storm warning maritime flag is also used in lieu of ...
The same flag as a storm warning is used to indicate a tropical storm warning. On land, the National Weather Service issues a 'high wind warning' (Specific Area Message Encoding code: HWW) for storm-force winds, which also encompasses the lesser gale-force and greater hurricane force winds. In most cases, the warning applies to winds of 40-114 ...
A Heavy Freezing Spray Warning is issued by the National Weather Service of the United ... MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE MARQUETTE MI 1024 AM EST ...