On Sunday, July 15, 2018 at 12:49:05 PM UTC-4, Oren wrote:
On Sun, 15 Jul 2018 16:44:02 GMT, Bob
m wrote:

Windows open? Looks like it could be pollen blowing in

More specific; pollen from pine trees.

We have lots of yellow pollen here in Spring from trees other than pine,
probably oak because that's what most of them are, but I never paid
attention to specifically identify it, but here it's not pine, very
few of them, but lots of yellow dust everywhere. It goes on for about
a month and can't open the windows during that time.