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Tropical Atlantic Summary  Tropical Central Pacific Summary  Tropical Eastern Pacific Summary

ABNT30 KNHC 011244

Monthly Tropical Weather Summary
NWS National Hurricane Center Miami FL
700 AM EST Fri Dec 1 2017

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

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

Overall activity in the Atlantic basin in 2017 was well above
average, with 17 named storms, 10 hurricanes, and 6 major
hurricanes. This compares to the long-term averages of 12 named
storms, 6 hurricanes, and 3 major hurricanes. One unnamed tropical
depression also formed in 2017.

In terms of Accumulated Cyclone Energy (ACE), which measures the
combined strength and duration of tropical storms and hurricanes,
preliminary data indicate that the 2017 season was the most active
since 2005 and the 7th most active on record in the basin, behind
1933, 2005, 1893, 1926, 1995, and 2004.

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

Summary Table

Name                 Dates         Max Wind (mph)
TS Arlene            19-21 Apr            50*
TS Bret              19-20 Jun            45
TS Cindy             20-23 Jun            60
TD Four               5- 7 Jul            30*
TS Don               17-18 Jul            50
TS Emily         31 Jul- 1 Aug            45
H  Franklin           6-10 Aug            85
H  Gert              13-17 Aug           105
MH Harvey        17 Aug- 1 Sep           130
MH Irma          30 Aug-12 Sep           185
MH Jose               5-22 Sep           155
H  Katia              5- 9 Sep           105*
MH Lee               15-30 Sep           115
MH Maria             16-30 Sep           175
H  Nate               4- 9 Oct            90
MH Ophelia            9-15 Oct           115
TS Philippe          28-29 Oct            60
TS Rina               6- 9 Nov            60

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

Hurricane Specialist Unit