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Click here to Order your Radar Equipment Online Extra-tropical Systems The following warnings pertain to extra-tropical systems, or tropical systems other than closed cyclonic circulations.. Small Craft Warnings. Small craft warnings are issued in harbors, inland waters, and coastal OPAREAS, as well as other coastal inshore regions prescribed by the local area commander. The lower limit of the sustained wind speed used to set this warning varies by region and is defined by the local area commander. The local NAVMETOCCOM or USMC aviation weather activity can provide further information.. Gale Warnings. Area(s) experiencing sustained wind speeds of 35 knots or higher will be bounded and a gale warning issued.. Storm Warnings. Area(s) experiencing sustained wind speeds of 50 knots or higher will be bounded and a storm warning issued.. Wind Warnings. Wind warnings for the Northern Hemisphere are automatically disseminated via the Fleet Multichannel Broadcast or Automatic Digital Network (AUTODIN). Automatic dissemination of warnings in the Southern Hemisphere are limited to specifically defined areas designated by fleet commanders due to limited naval operations and sparsity of observations. Wind warnings are normally issued every 12 hours.Cyclonic Circulations of Tropical Origin Table 10-1 lists tropical warnings and associated wind speeds where applicable:Issuance of Advisories and Warnings Tropical Cyclone Formation Alert (TCFA) advisories are issued whenever conditions are right for the development of a tropical cyclone.Tropical depression/storm and hurricane/typhoon warnings are issued via AUTODIN and the Fleet Multichannel Broadcast every 6 hours for storms in the Northern Hemisphere. They originate from three places:1. NAVLANTMETOCCEN Norfolk issues warnings for storms in the North Atlantic, Caribbean Sea, and Gulf of Mexico.2. NAVPACMETOCCEN Pearl Harbor issues warnings for storms in the eastern and mid-Pacific.3. NAVPACMETOCCEN WEST Guam issues warnings for storms in the western Pacific and the Indian Ocean.HIGH SEAS WARNINGS These warnings are issued every 12 hours whenever actual or forecast significant wave heights in an ocean area of the Northern Hemisphere equal or exceed 12 feet.This information is now available on CD in Adobe PDF Printable Format |
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