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A bomb cyclone is a rapidly intensifying extratropical cyclone where central pressure drops at least 24 millibars in 24 hours, often causing severe weather like blizzards, high winds, and heavy snow. The latest event struck the northern US around December 29-30, 2025, affecting the Midwest, Great Lakes, and Northeast with blizzard conditions and tornadoes.
About Bomb Cyclone
- Definition: A bomb cyclone (or bombogenesis) occurs when a storm’s central pressure drops by at least 24 millibars in 24 hours.
- Mechanism: Cold Arctic air collides with warmer air from the south, fueling rapid intensification.
- Result: The storm strengthens quickly, producing heavy snow, strong winds, and frigid temperatures.
Overall, a bomb cyclone is a rapidly intensifying storm system where atmospheric pressure drops dramatically—at least 24 millibars in 24 hours—causing extreme winter weather like blizzards, high winds, and frigid temperatures.
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