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The National Hurricane Center is responsible for the region east of 140°W, while the Central Pacific Hurricane Center is responsible for storms forming west of 140°W to the International Date Line. Atlantic hurricane – a tropical cyclone that forms in the Atlantic Ocean. The National Hurricane Center is responsible for the region.
A tropical cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world. [4] [5] The systems generally have a well-defined center which is surrounded by deep atmospheric convection and a closed wind circulation at the surface. [4]
Cross section of a mature tropical cyclone. A typical tropical cyclone has an eye approximately 30–65 km (20–40 mi) across at the geometric center of the storm. The eye may be clear or have spotty low clouds (a clear eye), it may be filled with low-and mid-level clouds (a filled eye), or it may be obscured by the central dense overcast.
Hurricane Alice is the only known Atlantic hurricane to span two calendar years, and one of only two named tropical cyclones to do so in the North Atlantic basin. This image of the PPI scope of SPS-6 radar on the USS MIDWAY shows the rare January hurricane northeast of British Virgin Islands .
Some rainbands move closer to the center, forming a secondary, or outer, eyewall within intense hurricanes. [15] Spiral rainbands are such a basic structure to a tropical cyclone that in most tropical cyclone basins, use of the satellite-based Dvorak technique is the primary method used to determine a tropical cyclone's maximum sustained winds ...
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The structure of Hurricane Rita as seen by ELDORA radar. Most hurricanes exhibit a definitive eyewall and spiral rain bands outside of the eye. These spiral rain bands were known to be complex structures that possess deep convective cores enmeshed in low altitude precipitative clouds.