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Tropical Storm Ian[edit]
Tropical storm (SSHWS)
Duration September 12 – September 16
Peak intensity 60 mph (95 km/h) (1-min) 994
mbar (
hPa)
On September 5, the NHC indicated that the development of a tropical cyclone was possible in the East Atlantic over subsequent days.
[115] A tropical wave emerged off the western coast of Africa the next morning,
[116] slowly coalescing into Tropical Storm Ian by 15:00 UTC on September 12.
[117] Steered north and the northeast by an approaching upper-level trough, the cyclone struggled within an environment of high shear, with its low-level center displaced west of its associated convection.
[118] An upper-level low became superimposed with the storm's center by late on September 14, yielding a more subtropical-like appearance on conventional satellite.
[119] By 09:00 UTC on September 16, however, a small mid-level eye became apparent, and Ian accordingly peaked with winds of 60 mph (95 km/h).
[120] Deep convection dissipated as cold air wrapped into the center, marking Ian's transition into an extratropical cyclone.
[121]