How can I describe this sky, in 3 letters as per the Aerodrome actual weather - METAR decode?
I found online a comprehensive list of Metar codes
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L1 Clouds: Cumulus (Cu) with little vertical extent
but it could also be
L5 Clouds: Stratocumulus (Sc) not from spreading out of Cumulus (Cu)
But I will agree with Ron on this one, its BKN (5-6 Okta based on the picture in my opinion)