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Iselle Weakens, Expected to Dissipate by Friday

8/27/2026

Summary

Iselle Weakens, Dissipates

The U.S. National Hurricane Center says Tropical Storm Iselle is weakening and will dissipate by Friday.
At 5 a.m. Iselle was 900 mi west of Baja California’s tip with 45-mph winds.
Forecasters expect Iselle to become a remnant low tonight and disappear within three days.
Iselle’s swells will create life-threatening surf and rip currents on Baja’s west coast.
Hawaii will experience sunny breezy weather with highs in the high 80s-low 90s.

Summary

Iselle Absorbs Julio

Iselle’s larger circulation will dominate Julio, absorbing its core as the weaker storm fades.
Meteorologists note the interaction is rare but more likely during active Pacific hurricane seasons with multiple simultaneous storms.
After merging, environmental conditions are expected to become less favorable for further intensification toward hurricane strength.
The phenomenon is named after Japanese meteorologist Sakuhei Fujiwhara, who first described cyclonic interactions.

History

Historical Context

In 1992 Hurricane Iniki became the first major hurricane to strike Hawaii since Iwa (1982), causing $3.1 billion in damage and prompting the National Hurricane Center and Central Pacific Hurricane Center to improve multi-storm models. The 1992 season’s record activity also spurred development of models that now track Tropical Storm Iselle’s Fujiwhara interaction with Hurricane Julio west of Baja.

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Iselle Weakens, Dissipates

The U.S. National Hurricane Center says Tropical Storm Iselle is weakening and will dissipate by Friday.
At 5 a.m. Iselle was 900 mi west of Baja California’s tip with 45-mph winds.
Forecasters expect Iselle to become a remnant low tonight and disappear within three days.
Iselle’s swells will create life-threatening surf and rip currents on Baja’s west coast.
Hawaii will experience sunny breezy weather with highs in the high 80s-low 90s.

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