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 mass of very cold, dry air that mostly originates over the Arctic Ocean.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...
A type of cloud consisting mostly of small particles such as ice particles.
Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...
Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...
Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...