Metar "prfg"
 

What does the "PR" means? :confused:
Many thanks

Note 1: When used with FG, the qualifier 'PR' is used for fog banks, i.e. an extensive area of fog impinges upon an airfield, reducing visibility over part of same to less than 1 km; 'BC' [ patches ] would be used when a discrete, small-scale area of fog drifts/forms over the airfield, again reducing visibility below 1 km but not in all directions. In practice, it is not easy to tell the two apart!

Voila!

Thanks very much indeed
Best from Germany
:D

Try see this http://www.dmi.dk/dmi/koder.pdf

It tells you that PR is Part of the airfield covered with fog

Have a nice x-mas,

Martin