Sunshine Duration

Sunshine duration is the number of seconds of sunshine over a 3, 6, or 12 hour period depending on forecast hour. It is a general indicator of cloudiness.

Cloud Water

Cloud water is a measure of liquid water content present in the atmosphere.

Cloud Work Function

Cloud work function is a measure of the difference between the moist static energy in the cloud and the environment. It can be viewed as an indicator of whether the cloud is likely to grow.

Other Issues