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Subject: E15) What tropical storms and hurricanes have moved
from the Atlantic to the Northeast Pacific or vice versa?
Contributed by Stephen Caparotta, D. Walston, Steven Young
and Gary Padgett
Here is a list of tropical cyclones that have crossed from
the Atlantic basin to the Northeast Pacific and vice versa. To
be considered the same tropical cyclone an identifiable center of
circulation must be tracked continuously and the cyclone must
have been of at least tropical storm strength in both basins
(i.e. sustained winds of at least 34 kt, or 18 m/s). This record
only goes back to 1949. Before the advent of geostationary satellite
pictures in the mid-1960s, the number of Northeast Pacific tropical
cyclones was undercounted by a factor of 2 or 3. Thus the lack of
many of these events during the 1960s and earlier is mainly due to
simply missing the Northeast Pacific TCs.
There has not been a recorded case where the same tropical cyclone
crossed from the Atlantic into the Northeast Pacific then crossed back
into the Atlantic, but Hattie/Simone/Inga in 1961 came close. There
is no evidence that a single center of circulation persisted through
several crossings of land, but the envelope of moisture and instability
from one system helped spawn the next.
Northeast Pacific Tropical Storm Alma (May 2008) became
a remnent low in the Atlantic where it merged with another tropical wave
which generated Atlantic Tropical Storm Arthur.
Atlantic Hurricane Cesar (July 1996) became Northeast Pacific
Atlantic Tropical Storm Bret (August 1993) became Hurricane
Greg in the Northeast Pacific.
Northeast Pacific Hurricane Cosme became Atlantic Tropical
Storm Allison (June 1989).
Atlantic Hurricane Joan (October 1988) became Northeast Pacific
Atlantic Hurricane Greta (September 1978) became Northeast
Pacific Hurricane Olivia.
Atlantic Hurricane Fifi (September 1974) became Northeast
Pacific Tropical Storm Orlene.
Atlantic Hurricane Irene (September 1971) became Northeast
Pacific Tropical Storm Olivia.
Atlantic Hurricane Hattie (October-November 1961) after
dissipating over Guatemala contributed to the formation of Northeast Pacific
Tropical Storm Simone which crossed the isthmus of Teuhantepec and merged with
other disturbed weather which later formed Atlantic Tropical Storm Inga.
A Northeast Pacific Tropical Storm (September-October 1949)
became an Atlantic Hurricane (Storm #10) and made landfall in TX.
Last Revised April 1, 2010
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