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 term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...
The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.
The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...
A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...
A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.