KROC From , joined Dec 1969, posts, RR: Reply 9, posted (10 years 6 months 2 weeks 1 day 12 hours ago) and read 1607 times:
From the middle picture, it looks as if there is a split in the low level stratus, maybe caused by winds aloft, 2 different air masses etc. Hence my guess. Like I said though, hard to venture a guess from the pics.
Stratofish From Germany, joined Sep 2001, 1040 posts, RR: 6 Reply 10, posted (10 years 6 months 2 weeks 1 day 10 hours ago) and read 1578 times:
Did it look like they were rotating a bit and moving over you?
If so they were indeed roll couds. They happen mostly in the downdraft area of a thunderstorm. Often this is the area right before the precipitation/raining one. Roll clouds CAN be an indication of high wind gusts and turbulences.
Sometimes they can happen along with the rear flank downdraft. AFAIK, roll clouds and shelf clouds are a clear sign of a supercell, so you better seek shelter if you see them. Although I have never seen a roll cloud yet myself .