In the Great White North the ATIS reports winds averaged over 2 minutes (Mean wind). Winds given by Tower controllers are averaged over the previous 5 seconds (Now winds). Both are MAG.
<font face="Verdana, Arial, Helvetica" size="2">.....unless the person transmitting it is reading it from something written</font>
FSS when giving TAFs/METARS will state that fact and under those circumstances I
assume(correctly or otherwise

) that they are reading them and that winds are given as True.
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[email protected] edited for appalling typing
[This message has been edited by Code Blue (edited 12 March 2001).]