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The weather service put out a special marine warning Wednesday morning of high waves and possible waterspouts. The warning was in effect until 12:15, though thunderstorms over the southern half of ...
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.
Significant weather advisory SPS (alt.: significant weather alert) – A strong thunderstorm below severe criteria, containing small hail below 1 inch (2.5 cm) diameter, and/or strong winds of 39–57 miles per hour (63–92 km/h), is indicated by Doppler weather radar and may create some adverse impacts on travel.
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 .
00:48. Includes weather reports from an extended list of coastal stations at 00:52 and an inshore waters forecast at 00:55 and concludes with a brief UK weather outlook for the coming day. The broadcast finishes at approximately 00:58. 05:20. Includes weather reports from coastal stations at 05:25, and an inshore waters forecast at 05:27.
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 ...
higher gusts up to 55 kt are expected around cape blanco. these winds will persist through the late evening... then will shift southwest and gradually ease to 20 to 30 kt late tonight. as the winds increase...combined seas will build to 12 to 15 feet at 8 seconds.
Navtex is an international, automated system for instantly distributing maritime safety information (MSI) which includes navigational warnings, weather forecasts and weather warnings, search and rescue notices and similar information to ships. A small, low-cost and self-contained "smart" printing radio receiver is installed on the bridge, or ...