From (从: Jorn Olsen works for the Dutton-Lainson Co.
Location (地点: in Hastings, Nebraska, and lives by Heartwell Park next to Hastings College.
The other night he took these photos . The stadium lights are at the Hastings College stadium just east of his home.
Form (從何而來): The clouds are called Mammatus clouds 巨大的雲They do not precede a tornado, or foretell a storm, but are formed when the air is already saturated with rain droplets and/or ice crystals and begins to sink. The worst of the storm is usually over when these kinds of clouds are seen.
They are quite rare, but really beautiful.
資料來源:
Jorn Olsen Photography
Idea Grapes (posted by yourn)