What is Arctic Air?
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
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A very cold high pressure that originates over the Arctic Ocean.
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
An instrument for measuring atmospheric pressure.
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...
Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...