Weather topic #1

 Every couple days, I will post a new weather topic! They are also available on my weather topics page.

Topic 1:evaporative cooling.

Evaporative cooling can occur year round, but is most common in the winter months. Evaporative cooling is when an airmass is so dry, and typically somewhat cool, that any moisture moving into that airmass typically evaporates before it hits the ground. When it evaporates, it takes heat with it, and cools the atmosphere further. For example, if the temperature is 35 and the dew point (measure of moisture in the atmosphere) is low enough, let’s say 25, the airmass may cool to around freezing (32 degrees Fahrenheit). During the temperature fall, the dew point will rise. Once they are close enough, precipitation may begin to fall, and if enough evaporative cooling takes place, it could even fall as snow. However, there is a catalyst for this reaction. The precipitation must be rather heavy and frequent, otherwise not enough can evaporate, and cool the atmosphere. 




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