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Smallwikipedialogo.png This page uses content from Wikipedia. The original article was at wikipedia:en:2011 Atlantic hurricane season#Hurricane Philippe. The list of authors can be seen in the page history. As with Hurricane Wiki, the text of Wikipedia is available under the GNU Free Documentation License.

Hurricane Philippe was the 16th named storm and 5th hurricane of the above-average 2011 Atlantic hurricane season. It formed on September 24, 2011 as Tropical Depression Seventeen south west of the Cape Verde Islands. Since Philippe remained away from land, no deaths or damage was reported. Lasting over 13 days, it is the longest lived Atlantic tropical cyclone since Bertha in 2008. It strengthened into a hurricane for a few hours before weakening. In the evening hours of October 8, 2011, Philippe lost all of its tropical characteristics.

Meteorological historyEdit

On September 23, a well-defined tropical wave emerged off the coast of Africa, associated with plentiful shower and thunderstorm activity. Moving westward and embedded within a favorable environment for development, the wave quickly became organized. During the morning hours of September 24, the National Hurricane Center designated the low as a tropical depression, while located about 290 mi (465 km) south of the southernmost Cape Verde Islands. Later that day, the depression was upgraded to a tropical storm, with the NHC naming it Philippe. Since that time strong shear from both upper level winds and later on from Ophelia's outflow, as well as periodic entrainment of dry air kept the cyclone both small and disorganized, with the center often exposed to the point where the low level circulation reformed under the convection that defines a tropical system at least once. An exposed cyclone can be seen as a wispy series of clouds circling a small area, rather than under the canopy of thunderstorms. Because of this hostile environment, Philippe remained near the minimum for a tropical storm. On the afternoon of October 2, an Advanced Scatterometer (ASCAT) pass confirmed that Philippe was a strong tropical storm, contrary to satellite estimates. Despite high wind shear, it remained a strong tropical storm afterward and actually at times developed an eye feature. On October 6, after over 12 days as a tropical storm, Philippe became a Category 1 hurricane. But on October 7, it weakened back into a tropical storm and the next day it became post-tropical.

ImpactEdit

Philippe passed several thousand miles west of the Azores as a tropical storm. The extratropical remnants of Philippe passed by Iceland during the weekend.

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