Satellite images and tracking maps of Category 1 Tropical Cyclone 28P 2021, April 10 - 12. Max wind speed 75km/h.
Infrared imagery shows that 28P has significantly weakened, with the lower levels decoupling and lagging behind the upper-level cloud features.
An extrapolation of a partial ASCAT-B pass lent high confidence in the initial position. The same ASCAT pass showed a small area of 65-75 km/h winds (35-40 knots) confined to the western side of the quickly weakening circulation.
28P is moving southeastward along the side of a deep-layer subtropical ridge to the east, but forward speed has slowed as it decouples from the upper-level flow.
As the system moves further southeastward, wind shear will increase to over 65 km/h (35 knots) and sea surface temperatures will cool to less than 25°C, leading to rapid dissipation below warning criteria by 12 hours.
This is the final warning on this system by JTWC. The system will be closely monitored for signs of regeneration.
Maximum significant wave height is 4.6 meters (15 feet).
Information provided by the Joint Typhoon Warning Center (JTWC).