Current Snapshot

The Pacific Disaster Center’s (PDC Global) Monday, August 11, 2025, Tropical Cyclone Activity Report…for the Pacific Ocean, the Indian Ocean, and adjacent Seas

Current Tropical Cyclones:

Tropical Cyclone 08E (Henriette)…is located approximately 660 NM north of Honolulu, Hawaii

Tropical Cyclone 16W (Podul)…is located approximately 336 NM south of Kadena AB

Central Pacific Ocean:

Tropical Cyclone 08E (Henriette)

COMPACT HURRICANE HENRIETTE CONTINUES NORTHWESTWARD WELL NORTH OF HAWAII

According to the NHC advisory number 32

Henriette is moving toward the northwest near 17 mph (28 km/h) and this general motion is expected to continue through Wednesday. A turn toward the north-northwest at a slower forward speed is forecast on Thursday. Maximum sustained winds are near 80 mph (130 km/h) with higher gusts. Little change in strength is expected tonight. Weakening is forecast to begin on Tuesday, and Henriette is expected to become a post-tropical cyclone by early Thursday. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 70 miles (110 km).

Western Pacific

Tropical Cyclone 16W (Podul)  

According to the JTWC warning number 21 sustained winds are 65 knots with gusts to near 80 knots

Animated infrared satellite imagery shows cooling cloud tops developing over the low-level circulation center of tropical storm 16W, indicating strengthening convection. This deep convection is persisting despite high vertical wind shear from the north. Water vapor imagery also reveals upper-level diffluence, which is a favorable condition for storm development. The initial position is placed with medium confidence due to the inability to locate the obscured low-level circulation center in animated eir and a lack of recent microwave imagery.

The initial intensity of 55 knots is assessed with medium confidence, based on the agency and objective fixes listed below. However, the recent increase in convection over the past six hours suggests that the storm is on an intensifying trend.

Tropical storm 16W is expected to continue on a west-northwestward track, steered by a subtropical ridge to the north. However, the storm may exhibit irregular motion just before making landfall on the eastern coast of Taiwan. This is due to the known track deflection caused by the central mountain range (cmr), which can induce vorticity and lead to unusual looping or curving behavior in approaching tropical cyclones. After passing over Taiwan and the Taiwan Strait, the storm will make a final landfall on mainland China.

The environment for development will remain marginally favorable over the next 36 hours. While warm sea surface temperatures and moderately diffluent upper-level flow are favorable, persistent 25-3 knot vertical wind shear from an enhanced upper-level ridge to the north will restrict the rate of intensification. TS 16W is expected to reach a peak intensity of 75 knots. After 36 hours, the upper-level environment will become more streamlined, and the storm will interact more significantly with the enhanced flow, initiating a weakening trend.

This weakening will accelerate after landfall on Taiwan as the vertical structure is disrupted by the mountainous terrain of the cmr. TS 16W will re-emerge over the Taiwan Strait into an environment of high shear and low ocean heat content, before its second and final landfall on
mainland China. The mountainous terrain of Taiwan will ultimately lead to dissipation of TS 16W by 72 hours.