This phenomenon happens every seven years or so.
The pines and I use this term generally, seem to go into overdrive and produce so much pollen, that the air goes yellow when the wind catches it.
This year was the most extreme according to all I speak to. It has been happening all over Europe. As I write on the 24th, puddles are still ringed with yellow.
Maybe it was the weather was just right, stormy winds late afternoon catching the dry and open buds.
Even so, the amount of yellow was extreme.
It was everywhere.
Even Swingle got a covering.
These are the culprits!