List of Eastern Pacific tropical storms

Tropical cyclones that attain such winds and make landfall while maintaining that intensity are capable of causing minor to moderate damage to human lives and infrastructure.

The North Pacific High and Aleutian Low which occur from December to April, produce strong upper-level winds which prevent the formation of tropical cyclones.

During the summer and early autumn months, sea surface temperatures are generally warm enough to support tropical cyclone development in the Northeast Pacific, and perhaps even rapid intensification.

[9] During the winter and spring months of December to April, sea surface temperatures in the tropics are usually too low to support development.

Another factor preventing tropical cyclones from forming during the winter is the presence of a semi-permanent low-pressure area called the Aleutian Low between January and April.

Its effects in the central Pacific near the 160th meridian west cause tropical waves that form in the area to drift northward into the Gulf of Alaska and dissipate or become extratropical.

The Intertropical Convergence Zone departs southward in mid-May permitting the formation of the earliest tropical waves,[10] coinciding with the start of the eastern Pacific hurricane season on May 15.