South Indian Ocean – Invest 97S
Friday, December 24, 2021

Current Snapshot

For all the latest updates visit: DisasterAWARE

By PDC’s Senior Weather
Specialist Glenn James

There’s a tropical disturbance being referred to as Invest 97S…which is located approximately 101 NM north of Darwin, Australia

According to the JTWC, satellite imagery depicts fragmented but formative rain bands feeding into a consolidating low level circulation, with deep convection in the southern semicircle. Nearby surface observations indicate 20-25 knot winds along the southwest periphery of
the circulation.

Environmental analysis indicates favorable conditions for development with strong poleward and equatorward outflow aloft, low to moderate (10-15 knot) vertical wind shear, and very warm sea surface temperatures.

Global models are in strong agreement on the intensification of 97S and concur that the invest will track over land in the next 24-48 hours.

Maximum sustained surface winds are estimated at 20 to 25 knots.

The potential for the development of a significant tropical cyclone within the next 24 hours is upgraded to High.