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A supplement to Technical Implementation Notices 04-40 and 04-41 is now available. Notice 04-40 contains information on changes to the World Meteorological Organization (WMO) headers and NWS communication identifiers for text products produced at the Aviation Weather Center and the Alaska Aviation Weather Unit. Notice 04-41 contains information on the changes to the format of latitude and longitude geographical coordinates used in NWS aviation products. Details ...