Nimbostratus clouds are known for their persistent rain or snow. They're thick, dark gray clouds that cover the entire sky, often creating a gloomy, overcast appearance. Here's what happens to them:

* They release precipitation: This is their primary function. Nimbostratus clouds are full of water droplets or ice crystals, which coalesce and fall as rain, snow, sleet, or freezing rain.

* They can persist for hours: Unlike some storm clouds, nimbostratus clouds can linger for a long time, producing steady, widespread precipitation. This makes them associated with prolonged periods of rain or snow.

* They can transform into other cloud types: Nimbostratus clouds can evolve into other cloud formations, such as altostratus or stratus clouds, as the weather conditions change.

* They can dissipate: As the precipitation weakens and the air becomes drier, the nimbostratus clouds may dissipate, leaving behind a clearer sky.

In summary, nimbostratus clouds are responsible for delivering long-lasting, steady precipitation. Their presence often signals a cloudy, rainy or snowy day. They can transform into other cloud types or dissipate as weather conditions shift.