It moved erratically at first, though after attaining tropical storm status it curved westward due to the subtropical ridge to its north.

Based on sufficient satellite classifications, JTWC upgraded the depression to Tropical Storm Isa early on April 12 while it was located 105 km (65 mi) of Pohnpei.

[2] Isa maintained a nearly due-westward movement, although tropical cyclone prediction models anticipated a quick turn to the north.

It gradually curved to the north, and on April 20 JTWC classified Super Typhoon Isa as reaching peak 1-min winds of 270 km/h (170 mph).

At this point, Isa became an annular typhoon, with a large eye and a lack of spiralform rainbands, while moving nearly due northward, through a weakness in the subtropical ridge.

It accelerated to the northeast under the flow of the mid-latitudes, and the typhoon weakened more rapidly;[1] JMA downgraded Isa to a tropical storm on April 22,[2] which was followed suit by the JTWC the next day as upper-level wind shear increased.

At 0600 UTC on April 23, the JTWC issued the last advisory on the system,[1] and the next day JMA classified Isa dissipated as it became absorbed by a cloud band from a large extratropical cyclone to the east of Japan.

The flight was the last in Operation Pacific Haven [de], which was a multimillion-dollar humanitarian effort to transport more than 6,600 Kurds in a political asylum to the mainland of the United States.

The combination of winds and sea salt caused damage to the island's tomato, okra, cucumber, and soybean crops.