Jangmi continued to intensify through 18Z on the 27th
On 06Z on the 25th of Septebember, Jangmi was named a Typhoon. 48 hours later: by 06Z on the 27th, Jangmi was a Super Typhoon with reported 135 knot winds, according to the working best track on the Unisys website. Jangmi intensified very quickly. By 00Z on the 29th Jangmi had weakened to a Tropical Storm. It continues to weaken.
Attached is the SATCON intensity plot for the storm:
SATCON shows Jangmi’s clear intensification and weakening. What is also shows is the very successful performance of the satellite-intensity techniques. The SATCON (and corresponding ADT and AMSU) are very close to the best track. The C-130 recon , however, had also reported nearly 140 kt winds, implying an even better performance for the algorithms that will have to be analyzed post-storm.
The MIMIC animation from 00Z on the 26th - 00Z on the 27th linked here shows Jangmi’s intensification and organization. The animation shown here from 00Z on the 27th - 00Z on the 28th shows its annular status as it holds its intensity for nearly 24 hours and begins to weaken.
The animation below shows the strong analyzed divergence, anticyclonic outflow from the upper-level AMVs, and clear, well-defined eye near the Jangmi’s peak intensity:
Jangmi quickly began to weaken after it neared cooler Sinlaku and Hagupit cooled waters and crossed Taiwan. Its current status and future track will be the subject of a future blog post.