I understand that METARs from 25th Nov will have the visibility stated as
the 'prevailing' visibility - i.e the value that is at least the visibility
for half of the station horizon circle.
If there is reduced vis of less than 1500m or 50% of the value above that
will also be stated
i.e 7000 2000E
Could someone tell me what the current criteria is for quoting 2 visibility
values.
Thanks
Phil

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