All cloud types
Cloud Name
Nimbostratus
A thick grey blanket cloud that brings steady rain or drizzle.
What it looks like
Nimbostratus covers most of the sky with a dark, flat, layered look. It often hides the sun completely.
Simple meaning
This cloud usually means long-lasting rain and dull visibility rather than short sharp showers.
For boating
Expect wet decks, reduced visibility, and uncomfortable conditions over a longer period.
How to recognize Nimbostratus
- Dark grey sky
- Steady rain
- No clear cloud edges
- Low, gloomy ceiling