In article ,
Andy Page writes:
A lot of whitish dust deposits on the car this morning after the light
rain of last night - typical after washing it yesterday! Anyone else
notice anything? No obvious dust plume upwind on MSG dust
imagery in the last few days.

Could it have been pollen rather than dust?
--
John Hall
"Sir, I have found you an argument;
but I am not obliged to find you an understanding."
Dr Samuel Johnson (1709-1784)