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Active Tropical Systems Tropical Season Archive Satellite National Hurricane Center
Outlooks Discussions Tropical Summaries  
Tropical Atlantic Summary  Tropical Central Pacific Summary  Tropical Eastern Pacific Summary

Expires:No;;200109
ABPZ30 KNHC 011212
TWSEP 

Monthly Tropical Weather Summary
NWS National Hurricane Center Miami FL
800 AM PDT Sun Oct 01 2017

For the eastern North Pacific, east of 140 degrees west longitude:

Four named storms formed in the eastern North Pacific basin in
September, with three of them becoming a hurricane and one a major
hurricane.  Based on a 30-year (1981-2010) climatology, three named
storms typically form in the basin in September, with two of those
becoming hurricanes and one reaching major hurricane intensity.

In terms of Accumulated Cyclone Energy (ACE), which measures the
combined strength and duration of tropical storms and hurricanes,
activity in September was less than half of normal.  So far in
2017, however, ACE has been above normal.

Reports on individual cyclones, when completed, are available at
the National Hurricane Center website at:
hurricanes.gov/data/tcr/index.php?season=2017&basin=epac

Summary Table

Name                 Dates         Max Wind (mph)
---------------------------------------------------
TS Adrian           9-11 May            45
TS Beatriz     31 May- 2 Jun            45*
TS Calvin          11-13 Jun            45*
H  Dora            25-28 Jun            90
MH Eugene           7-12 Jul           115
MH Fernanda        12-22 Jul           145
TS Greg            17-26 Jul            60
TD Eight-E         18-20 Jul            35
H  Hilary          21-30 Jul           105
H  Irwin       22 Jul- 1 Aug            90
TD Eleven-E         4- 5 Aug            35
TS Jova            12-13 Aug            40
MH Kenneth         18-23 Aug           130
TS Lidia       31 Aug- 3 Sep            65
H  Max             13-15 Sep            80
H  Norma           14-20 Sep            75
MH Otis            11-19 Sep           115
TS Pilar           23-25 Sep            40
---------------------------------------------------

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

$$
Hurricane Specialist Unit