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Tropical Depression Iona 2025

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Tropical Depression Iona

Live tracking map, satellite images and forecasts of Tropical Depression Iona 2025 in the western Pacific Ocean. Current wind speed 35mph. Max 125mph.

Satellite imagery indicates that convection associated with Iona remains fragmented and disorganized, with the low-level circulation becoming increasingly broad and diffuse under persistent west-northwest shear. The center is exposed and becoming less defined, and a recent ASCAT pass detected peak winds of only around 30 mph (25 knots) in the northeastern quadrant. Subjective Dvorak current intensity estimates from SAB, HFO, and JTWC ranged from 1.5/25 knots to 2.5/35 knots. Based on these data and the degraded satellite appearance, the initial intensity is lowered to 35 mph (30 knots).

The initial motion is estimated at 295/15 knots. Iona is expected to continue west-northwestward through the weekend while gradually slowing, steered by the southern flank of a low- to mid-level subtropical ridge to the north. A northwestward turn remains likely by late this weekend or early next week as the system approaches a weakness in the ridge. The latest track forecast remains similar to the previous advisory and is close to the consensus aids, with only minor adjustments.

Given the increasingly degraded structure of Iona and the lack of deep convection, little to no reorganization is anticipated. Persistent westerly shear, interaction with an upper-level trough, and the intrusion of mid- to upper-level dry air should continue to inhibit strengthening. While most dynamical model guidance depicts Iona gradually opening into a trough by early next week, the current disorganized state suggests that degeneration into a remnant low or trough could occur at any time over the weekend. The updated forecast maintains Iona as a tropical cyclone briefly, but the system is expected to dissipate by 72 hours or sooner.