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Atlantic Tropical Monthly Summary

Active Tropical Systems Basin Outlooks Satellite
August 2013 Atlantic Monthly Summary
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ABNT30 KNHC 011239

800 AM EST TUE DEC 01 2015

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

One tropical cyclone, Hurricane Kate, formed in the Atlantic basin
during November. Based on a 30-year (1981-2010) climatology, a
named storm forms in the Atlantic basin in November in about 7 out
of 10 years, with a hurricane forming once every other year.

For the 2015 season, 11 named storms formed in the Atlantic basin.
Four of the storms became hurricanes, and 2 reached major hurricane
status. There was also one unnamed tropical depression. While the
number of named storms, hurricanes, and major hurricanes was only a
little below the long-term average activity levels of 12, 6, and 3,
respectively, many of the named storms were relatively weak and
short-lived. As a result, in terms of Accumulated Cyclone Energy
(ACE), which measures the combined strength and duration of tropical
storms and hurricanes, activity in the Atlantic basin for the season
was only about 63 percent of the 1981-2010 median. This makes 2015 a
below-average season in terms of ACE.

Reports on individual cyclones, when completed, are available at the
National Hurricane Center website at .

Summary Table

Name                 Dates         Max Wind (mph)
TS Ana*             8-11 May            60
TS Bill*           16-18 Jun            60
TS Claudette*      13-14 Jul            50
MH Danny           18-24 Aug           115
TS Erika           25-29 Aug            50
H  Fred         30 Aug-6 Sep            85
TS Grace*            5-9 Sep            60
TS Henri*           8-11 Sep            50
TD Nine*           16-19 Sep            35
TS Ida*            18-27 Sep            50
MH Joaquin      28 Sep-7 Oct           155
H  Kate             9-12 Nov            75

* Denotes a storm for which the post-storm analysis is complete.

Hurricane Specialist Unit