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Bomb Cyclone
Context
A powerful bomb cyclone approached the Pacific Northwest and Northern California, causing high winds, heavy rain and snow.
What is a bomb cyclone?
- A bomb cyclone, also known as bombogenesis, is a fast-developing storm(low pressure area)that occurs when atmospheric pressure drops at least 24 millibars over a 24-hour period.
- A millibar is a way of measuring pressure.The lower the pressure, the more powerful the storm. In order to approximately qualify, the pressure needs to drop about 1 [millibar], or more, every hour over a 24-hour period.
- A bomb cyclone occurs when atmospheric pressure at the center of the cyclone drops rapidly.
- This can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters.
- The vast majority of such storms occur over the ocean. The storm can be tropical or non-tropical in nature.
- The term ‘bomb cyclone’ was first used around the 1940s.
- Effects of a bomb cyclone: The band of intense pressure can create heavy winds, blizzard conditions, heavy snow that can possibly reduce visibility and rainfall. Heavy precipitation can also cause coastal flooding.
- Hot spots for Bomb Cyclone:There are four active regions which are hot spots for Bomb Cyclone
- The Northwest Pacific
- The Northern region of the Atlantic Ocean
- The Southwest Pacific
- The Southern region of the Atlantic Ocean
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