KROC From United States of America, joined May 2000, 19737 posts, RR: 76 Reply 9, posted (9 years 11 months 2 weeks 5 days 5 hours ago) and read 1489 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.
"Never tell anybody outside the family what you're thinking again"
Stratofish From Germany, joined Sep 2001, 1011 posts, RR: 6 Reply 10, posted (9 years 11 months 2 weeks 5 days 2 hours ago) and read 1460 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 .