Skip Navigation Links
NOAA NOAA United States Department of Commerce

Monthly Eastern North Pacific Tropical Weather Summary

ABPZ30 KNHC 011249

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

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

No tropical cyclones formed in the basin in November. This is not
unusual, however, with a named storm forming in the basin in
November only once every 4 years based on a 1981-2010 climatology.

For the 2017 season, 18 named storms formed, including 9 hurricanes
and 4 major hurricanes. The number of named storms was above the
long-term average of 15, while the number of hurricanes and major
hurricanes was near the long term averages of 8 and 4, respectively.
There were also two tropical depressions that formed that did not
reach tropical storm strength.

In terms of Accumulated Cyclone Energy (ACE), which measures the
combined strength and duration of tropical storms and hurricanes,
activity in the basin in 2017 was near normal. Despite the large
number of tropical storms that formed in 2017, many of them were
weak and/or short lived.

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

Summary Table

Name                 Dates         Max Wind (mph)
TS Adrian           9-10 May            45*
TS Beatriz     31 May- 2 Jun            45*
TS Calvin          11-13 Jun            45*
H  Dora            24-28 Jun           105*
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            11-13 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
TS Ramon            4- 5 Oct            45
TS Selma           27-28 Oct            40*

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

Hurricane Specialist Unit

Preliminary Eastern North Pacific Tropical Cyclone Tracks
Preliminary Eastern North Pacific Tropical Cyclone Tracks