'Warm moist air travels' presentation slideshows

Black Frost is really the absence of any frost or frozen dew. Night time temperatures below freezing but with no visibl

Dew forms as the temperature drops to the dew point. Water droplets love to collect on surfaces or tiny particles. It is very difficult for water drop to join together without having a surface or tiny particle to cling onto. These particles are called condensation nuclei.

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