There's a very small chance that a roll cloud can turn into a spherical cloud, this one was observed in Japan 2016. : r/nevertellmetheodds
WHAT IS A ROLL CLOUD AND HOW DOES IT FORM? | Daily Mail Online
Roll Cloud, Shelf Cloud - EPOD - a service of USRA
Ominous UFO-Like Cloud Identified As Rare “Roll Cloud” | 5newsonline.com
MWN Blog: Rare "roll cloud" appears in the Memphis sky
Watch: Freaky cloud rolls over Lake Michigan | WEAR
WOLKEN: Rollen-Wolke - Roll-Cloud - Die besten 100 Bilder in vielen Kategorien
IN PHOTOS: Arcus cloud rolls over Regina | Globalnews.ca
Ever seen a roll cloud in action? Watch this | The Senior | Senior
Quiet day ahead before clouds, and possibly rain, roll into the area | WPBN
A Dramatic Roll Cloud Briefly Overtakes Chicago — Colossal
Sideways funnel cloud? Nope — Little Catalina sees roll cloud | CBC News
Rare, spectacular roll cloud tumbled over Nebraska Thursday morning - The Washington Post
Arcus cloud - Wikipedia
Roll Clouds of Sable Island - Sable Island Institute
Bizarre, Giant Tubular Cloud Rolling Across the Sea (Photo) | Live Science
Roll Cloud – Wikipedia
Rollcloud – fantastisch und unheimlich | Wetterkanal Kachelmannwetter
![Wetterphänomen Roll Cloud: Rollende Wolke walzt über Chicago - [GEO]](https://image.geo.de/30113546/t/tR/v3/w960/r0/-/morningglorycloudburketownfromplane-jpg--63040-.jpg "Wetterphänomen Roll Cloud: Rollende Wolke walzt über Chicago - [GEO]")
Wetterphänomen Roll Cloud: Rollende Wolke walzt über Chicago - [GEO]
Arcus cloud - Wikipedia
Rhode Island Roll Cloud Looks Otherworldly - Videos from The Weather Channel
Do you remember? - Roll cloud draws eyes to sky | Southlands Sun
Rare roll cloud sweeps across Durban, South Africa | Natural World | Earth Touch News
Fognado' in Santa Cruz was a roll cloud, meteorologists say
Roll Clouds - Clouds That Look Like a Tidal Wave - YouTube
What caused amazing roll cloud to churn down Lake Michigan shore - mlive.com
