Science

Rare Cloud Phenomenon Observed Over Wildfire

Updated 2026-09-29 04:55 UTC 1 source Neutral

Scientists documented a rare pileus cloud forming over a wildfire in Montana. The observation provides insights into atmospheric interactions during forest fires.

Coverage timeline — 1 article

NASA

Fire Cloud with a Pileus on Top

Scientists captured rare observations of an ephemeral pileus cloud hovering over a smoke-infused cloud that rose above a wildfire in Montana.

2026-09-29 04:01 UTC