nimbus clouds

On February 23 there was a spell of dead calm; heavy nimbus clouds and fog lowering over sea and plateau.

During the whole day nimbus clouds had hung heavily from the sky, and snow had fallen in grains and star-like crystals.

At three P.M. the blue sky appeared in the west, and the nimbus clouds subsided.

A hot wind blew from the north and now brought with it smoke and an overcast sky, which in the evening turned to nimbus clouds.