I saw a great one in Sisters Oregon last month. Wasn't like the wide cone shaped ones we get here in Cali. It was tall, tight and narrow. Everybody stopped to watch it.
Dust devils can be strong! When I was in junior high school in Southern California, I had an encounter with a monster duster. The whirlwind swept through the yard and nearly knocked me down. A student nearby had a notebook full of papers torn from his grasp and sent whirling up 50-100 feet and away.
On my way home that day, I saw the scattered pages from that notebook strewn through a housing tract 1/2 mile away.