Radar Animation for Atlanta, GA
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Current U.S. National Radar--Current
The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).
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Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.
North America Water Vapor (Moisture)
This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds ); brown indicates very little moisture present; black indicates no moisture.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Wall Clouds
A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along
the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises
above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again,
and the resulting condensation is a visible shelf cloud.
Next Topic: Wall Clouds
Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Drizzle
Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat
into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.
Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of
condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Drizzle
