By the time I took my camera to this Camry, it had been sitting inert for over 24 hours during and after a blizzard, redirecting snow away from its base through ground-level obstacle flows. The lopsided accumulation on its roof came from a snow-filled airflow stream over that portion of the shopping center at upper left, curving downward and rightward to an nearly perpendicular stream across the top of the car. Snow crystals deposited preferentially on the lee (right) half of the Toyota as the air parcels experienced speed convergence and slowed somewhat. Nobody had arrived yet to attempt extrication of the vehicle, a good thing since such an effort would have been futile for another day or two, at least.
Norman, OK (25 Dec 9), looking NW