11.   A weak disturbance will produce clouds and scattered thundershowers over the Sierra and the southern Cascades.

12.   A weak front will produce patchy clouds near the Canadian border.

13.   According to a Chinese proverb, with one turn of the hand you can produce clouds, with another turn of the hand you can produce rain.

14.   Advancing warm air will produce widespread clouds from the Great Lakes to the eastern Rockies.

15.   Clusters of tiny cones on sprigs of Japanese cedar, Cryptomeria japonica, produce clouds of pollen.

16.   For one, the increased evaporation in a warmer world might produce more clouds, which have a cooling effect.

17.   High level winds from the Southwest allowed mild, moist air to rise over the chilly air, producing clouds of almost every variety.

18.   In the West, low pressure with limited moisture will produce patchy clouds in the central and northern Rockies.

19.   In the third test, the Iraqi air force dropped two bombs, which again produced huge clouds.

20.   Moist winds from the east will ascend the northern Plains producing thick clouds along with widespread showers.