EESB03H3 Chapter 15: EESB03 Chapter 15 Weather Forecasting
14 Feb 2017
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15. 1 skywatching: weather predictions can be made observing the sky, noticing weather pattern, and interpreting these by using your understanding of what causes weather. Sky conditions, cloud types, wind directions, and relative temperatures and how these change all indicate weather patterns. The movement of clouds at different levels can assist you in predicting changes in the temperature of the air above. Knowing what type of temperature advection occurs in the upper atmosphere is a valuable forecasting tool. Advection describes the horizontal movement of air properties by wind. Cold advection occurs when warm air is blown in. when the surface is warm, cold advection aloft causes instability, which increases the likelihood of towering cumulus clouds and showers. Conversely, warm advection aloft increases the temperature of the upper atmosphere, making the air more stable. We can see the wind direction at cloud level by watching cloud movement, which indicates the type of advection that is occurring.
