Invest 94S, which is currently positioned near 10.1°S, 57.8°E as of the 00Z ATCF fix and is near 30kts (35mph) as of the 0z T2.0 agency dvorak fixes, is showing on and off signs of organization in the South-West Indian Ocean. The overall convective structure has been anemic and flaky as the system combats with moderate to strong mid to upper-level westerly shear associated with an upper level trough to its south. There is a small and compact low-level circulation present confirmed by the VIS loop and an earlier 18Z ASCAT-C pass yesterday. However, the circulation is too small for the 25km resolution to resolve, though it may look like a sharp trough from this. Regardless, the aforementioned VIS loop indicates a circulation present.
As said, 94S is fighting moderate to strong westerly shear but will gradually subside throughout Saturday from divergence aloft with the Subtropical Jet. Furthermore, it will stay decoupled from an approaching Upper-Level Anticyclone to its east which is steering 94S southwards, which will allow for slightly further organization which may lead to the formation of a tropical cyclone. Any significant strengthening of this system is not expected with marginally favorable conditions present. Beyond then, quick weakening and extratropical transition phase will be expected by early to mid next week.
The Mascarene Islands are in the trajectory of 94S with both Reunion and Mauritius potentially being landfall threats from the system. Regardless of formation or landfall, this system will bring enhanced rainfall to those islands, as the poleward outflow expansion and elongation of the system as it approaches the subtropics will increase precipitation rates over the Mascarene Islands.