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World Meteorological Organization

The World Meteorological Organization (WMO) has established a global service for the transmission of high seas weather warnings and routine weather bulletins, through the Enhanced Group Calling SafetyNET Service. METeorological service AREAS (METAREAS) are identical to the 16 NAVAREAS within the World-Wide Navigational Warning Service (WWNWS). Each METAREA has a designated National Meteorological Service responsible for issuing high seas weather warnings and bulletins. The designated authorities are not necessarily in the same country as the NAVAREA coordinators.

Gale Warnings

Gale warnings are issued when mean winds of at least force 8 or gusts reaching 43 knots are expected. Gale warnings remain in force until amended or cancelled. However, if the gale persists for more than 24 hours after the time of origin, the warning will be re-issued. The term “severe gale” implies mean winds of at least force 9 or gusts reaching 52 to 60 knots. The term “storm” implies a mean wind of at least force 10 or gusts reaching 61 to 68 knots. The term “imminent” implies within 6 hours of the time of issue: “soon” implies between 6 to 12 hours; “later” implies more than 12 hours. Broadcasts are made through RT, VHF and NAVTEX as well as SafetyNET.

Coastal Weather Bulletins for Shipping

For the benefit of coastwise shipping, fishing vessels, etc., weather bulletins for coastal areas are broadcast daily from Coastguard Rescue Centers. Each bulletin commences with gale warnings, if in force, and continues with a general weather synopsis and area forecasts in plain language valid for 24 hours from the time of transmission. Broadcasts are made through RT, VHF and NAVTEX.

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