Tropical Depression Senyar (04B) – Tropical Cyclone Advisory #2: 0300 UTC 28 November 2025

…Senyar regenerates into a tropical depression on the Pacific side of the Malay Peninsula…

Current storm information:

• Position: 3.4°N 104.0°E

• Movement: E at 5 knots (10 km/h)

• Intensity: 30 knots (55 km/h)

• Central pressure: 1008 hPa

Trend:

• Some slight strengthening is possible during the next 24 hours, and Senyar could become a tropical storm again later today.

Discussion:

Despite its low latitude and a less than optimal environment, radar data from Malaysia indicates that the remnants of Senyar continue to have a well-defined circulation center. In fact, the circulation is quite a bit more robust than satellite imagery would suggest, with a fairly solid ring of convection in the northern and western semicircles. Meanwhile, convection has increased significantly elsewhere within the circulation, although the banding is fairly ragged. Senyar is organized enough to get Dvorak estimates of T1.5 to T2.0 from KNES and RJTD, which means it has regenerated into a tropical depression with winds of 30 kts. It should be noted that Senyar is the first tropical cyclone on record to complete the North Indian to Western Pacific crossover from west to east - yet another way this system has made history.

Senyar is currently embedded within the inflow associated with Tropical Storm Koto to the northeast, and it is expected to move in a generally northeastward direction during the next couple of days. The environment appears to be marginally conducive for some strengthening during that time, and Senyar could regain tropical storm strength later today while it remains over warm SSTs, under moderate shear, and far from the northeasterly cold surge flow. By late in the weekend, however, Senyar should encounter a dramatic increase in shear as it begins to interact with Koto’s larger circulation. Senyar will likely weaken to a tropical depression on Monday before becoming absorbed by Koto soon after.

Forecast positions and maximum winds

• 000 hrs: 3.4°N 104.0°E – 30 kts 55 km/h

• 012 hrs: 3.9°N 104.8°E – 35 kts 65 km/h

• 024 hrs: 4.7°N 105.7°E – 35 kts 65 km/h

• 048 hrs: 7.1°N 108.4°E – 35 kts 65 km/h

• 072 hrs: 9.7°N 110.1°E – 25 kts 45 km/h

• 096 hrs: Absorbed by Koto