When an ICAO contracting state accepts responsibility for providing air traffic services within a flight information region or a control area, a meteorological watch office will :<br /></p><p><br /></p><p>a) maintain continuous watch over meteorological conditions affecting flight operations within its area of responsibility;<br /></p><p>b) prepare SIGMET and other information relating to its area of responsibility;<br /></p><p>c) supply SIGMET information and, as required, other meteorological information to associated air traffic services<br /></p><p>units;<br /></p><p>d) disseminate SIGMET information;<br /></p><p>e) when required by regional air navigation agreemen:<br /></p><p>1) prepare AIRMET information related to its area of responsibility;<br /></p><p>2) supply AIRMET information to associated air traffic services units; and<br /></p><p>3) disseminate AIRMET information;<br /></p><p>f) supply information received on pre-eruption volcanic activity, a volcanic eruption and volcanic ash cloud for which<br /></p><p>a SIGMET has not already been issued, to its associated ACC/FIC, as agreed between the meteorological and ATS<br /></p><p>authorities concerned, and to its associated VAAC as determined by regional air navigation agreement; and<br /></p><p>g) supply information received concerning the accidental release of radioactive materials into the atmosphere, in the<br /></p><p>area for which it maintains watch or adjacent areas, to its associated ACC/FIC, as agreed between the<br /></p><p>meteorological and ATS authorities concerned, and to aeronautical information service units, as agreed between the<br /></p><p>meteorological and appropriate civil aviation authorities concerned. The information shall comprise location, date<br /></p><p>and time of the accident, and forecast trajectories of the radioactive materials.<br /></p><p><br /></p><p><font color="#ff0000">Not clear whether any further information is required by data providers and/or data producers relating to MWOs.</font><br /></p>