What is Clear?
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.
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A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.
A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...
A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...