– Sky condition of less than 1/10 cloud coverage.

– The historical record of average daily and seasonal weather events.

– small particles in the air on which water vapor condenses and forms cloud droplets.

– the state of the sky when 9/10ths or more of the sky is covered by clouds.

– Inundation of coastal areas from waves and storm surge.

– A dome of cold surface high pressure that originates from the high latitudes.

– A low pressure which has the coldest temperatures located near its center. A cold core low is deep and is often associated with the polar jet stream. Mid-latitude cyclones are cold core lows.