Western Pacific, Indian Ocean, and adjacent Seas:
Western Pacific
By PDC’s Senior Weather
Specialist Glenn James
The Pacific Disaster Center’s (PDC Global) Monday, August 25, 2025, Tropical Cyclone Activity Report…for the Pacific Ocean, the Indian Ocean, and adjacent Seas
Current Tropical Cyclones:
Tropical Cyclone 19W (Kajiki) is located approximately 144 NM south of Hanoi, Vietnam – Final Warning
Tropical Cyclone 10E (Juliette) is located about 505 miles southwest of the southern tip of Baja California
Northeast Pacific Ocean:
Tropical Cyclone 10E (Juliette)
JULIETTE COULD BECOME A HURRICANE ON TUESDAY
Juliette is moving toward the west-northwest near 14 mph (22 km/h) and this general motion is expected to continue through Tuesday. A turn toward the northwest is forecast by Tuesday night, followed by a slower north-northwestward motion beginning late Wednesday. Maximum sustained winds have increased to near 65 mph (100 km/h) with higher gusts. Additional strengthening is expected, and Juliette could become a hurricane on Tuesday. Weakening is expected to begin on Wednesday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. An automated Mexican Navy station on Clarion Island recently reported a sustained wind of 36 mph (58 km/h) and a gust to 46 mph (74 km/h).
Well Southwest of the Baja California Peninsula:
>>> A tropical wave off the coast of southern Mexico is producing limited shower activity. Some slow development is possible late this week and into the weekend as the system moves westward to west-northwestward at 10 to 15 mph across the central part of the eastern Pacific basin.
* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent
Central Pacific Ocean: There are no active tropical cyclones
Well Southeast of the Hawaiian Islands:
A trough of low pressure located several hundred miles southeast of the Hawaiian Islands continues to produce disorganized showers and thunderstorms. Gradual development of this system is possible through the week and into the weekend while it moves westward at 10 to 15 mph across the central Pacific basin.
* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…40 percent
Western Pacific, Indian Ocean, and adjacent Seas:
Western Pacific
Tropical Cyclone 19W (Kajiki) – Final Warning
According to the JTWC warning number 13, sustained winds are 80 knots, with gusts to near 100 knots
After a brief period of quasi-stationary motion along the coast, the system’s center tracked inland between Vinh (48845) and Ha Tinh (48846) after 250800z. At 251200z, Vinh’s winds switched to east-northeasterly while Ha Tinh switched to south-southeasterly, which supports the initial position.
Animated radar imagery reveals a ragged but defined low-level circulation center, with fragmented spiral banding. A 251111z ssmis 91ghz microwave image also supports the initial position and shows a partial eyewall over the eastern quadrant.
The initial intensity is assessed at 80 knots based on the rjtd dvorak current intensity estimate of 4.5 (77 knots), which is consistent with the convective structure. TY 19W will track inland and weaken rapidly over the mountainous region of Laos, with dissipation expected by 36 hours.
>>> There’s an area of disturbed weather being referred to as Invest 93W, which is located approximately 99 NM east of Manila, Philippines.
Animated enhanced multi-spectral satellite imagery (msi) depicts flaring convection to the northwest of the partially exposed low level circulation center (llcc).
Environmental analysis for the area indicates favorable conditions for development with low vertical wind shear (10-15 kts), very warm sea surface temperatures (30 c), and moderate equatorward outflow aloft. Land interaction and a highly tilted vortex are currently hindrances moving forward as 93W continues to consolidate.
Global deterministic models are in fair agreement that 93W will track westward, with marginal development in the South China Sea. Ensemble models are more split, with ecens favoring weak development east of Luzon on a northwestward track, while gefs on the other hand is less aggressive and favors development as the system transits across Luzon.
Maximum sustained surface winds are estimated at 13 to 18 knots.
The potential for the development of a significant tropical cyclone within the next 24 hours remains low.