Cape Verde-type hurricane
A Cape Verde -type hurricane is an Atlantic hurricane that near the Cape Verde islands, which are located west of Africa, forms. An average hurricane season usually has two such Cape Verde -type hurricanes, which often are among the strongest storms of the year, as they will form the middle of the ocean and so long can stay on the warm sea before they hit land.
Origin
Cape Verde -type hurricanes typically develop from tropical waves, which are formed by instabilities in the eastern African Jet. These waves then drag, due to the trade winds westward to the open Atlantic and eventually develop when good environmental conditions prevail, near the Cape Verde Islands in tropical cyclones. Most storms form in this case generally in the months of August and September.
Typical behavior is
A typical Cape Verde -type hurricane formed from a tropical wave that develops near the Cape Verde islands in a tropical depression. After that, the system continuously strengthened and reaches in the eastern Atlantic, the strength of a tropical storm. In the mid-Atlantic Basin intensify the storms and then usually reach hurricane strength, but may since have also earlier intensified into a hurricane with favorable external conditions.
For a direction is North America moving hurricane, there are several typical courses:
- The storm moves generally towards the west and crosses the Lesser Antilles in the Caribbean. The storm then moves usually further west and goes to Belize, Nicaragua or Honduras on land. An example of such storms Hurricane Dean in 2007.
- When the storm is located north, he suggests a one nordwestlicheren course and draws on the Greater Antilles in the direction of the U.S. Gulf Coast. Hurricane Georges in 1998, Hurricane Andrew smashed such a course.
- Next northerly storms have an even nordwestlicheren course due to the prevailing in late summer East Atlantic high pressure area. These storms pull north by the Greater Antilles and meet in North or South Carolina on land ( for example, Hurricane Hugo). If storms are distracted by this high pressure area even further, accomplish a bow and finally move, close to the east coast over, back to the open sea, where they eventually become extratropical. Remnants of these storms can still cause high winds and heavy rainfall in Western Europe. An example of such a storm Hurricane Helene in 2006. Exceptionally, New England can, such as Hurricane Gloria in 1985, are taken.
- Sometimes the subtropical ridge located to the west and leaves the storms earlier make such an arc, where they often completely miss the country. An example of such a storm Hurricane Danielle in 2004.
Although these curves are typical of Cape Verde -type hurricanes, they must not be followed by any storm.
Cape Verde hurricanes since 1950
Swell
- NOAA AOML Hurricane Research Division definition of a Cape Verde -type hurricane (English )
- Talks about hurricanes in general and Cape Verde hurricanes (English )
- Tropical Cyclone