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Prop Vortices  
User currently offlinealaskan9974 From , joined Dec 1969, posts, RR:
Posted (9 months 1 week 4 days 6 hours ago) and read 1594 times:

Nearly every a/c out of here today has had vortices from the props, most pronounced with a herc that took off earlier. Originally on video, had to take a screen grab to share. What are the best conditions for these to form? Temp was in the teens and low humidity, opposite of what I thought optimal conditions were, high humidity and dewpoint close to air temp.

2 replies: All unread, jump to last
User currently offlinemjgbtv From , joined Dec 1969, posts, RR:
Reply 1, posted (9 months 1 week 4 days 5 hours ago) and read 1566 times:

Judging from a quick search in the db moisture is definitely the right condition. Is that frost in the foreground of your image? Maybe the sun was evaporating a layer of moisture from off the fields?

User currently offlinejpmagero From , joined Dec 1969, posts, RR:
Reply 2, posted (9 months 1 week 3 days 21 hours ago) and read 1514 times:
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The conditions I got these in were early morning, hazy with the fog lifting, mid-to-high 60s if I recall correctly.



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