Tropical Cyclone 05S (Darian) / Invest 98B / Invest 90S
Tuesday, December 20, 2022

Current Snapshot

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By PDC’s Senior Weather
Specialist Glenn James

Current Tropical Cyclones:

Tropical Cyclone 05S (Darian)…is located approximately 1225 NM east-southeast of Diego Garcia

 

Northwest and Southwest Pacific Ocean, North and South Indian Oceans, and Arabian Sea:

South Indian Ocean

Tropical Cyclone 05S (Darian)

According to JTWC Warning number 7, sustained winds were 130 knots, with gusts to 160 knots.

Tropical cyclone Darian has exceeded all expectations, and rapidly intensified into a 130-knot monster. Animated enhanced infrared satellite imagery depicts a 30 NM wide eye, with eye temperatures measured at +7c at analysis time, now measured at +14c an hour later.

The system is exhibiting some features of an annular tropical cyclone, with minimal banding features constrained to the western side of the circulation and an eye surrounded by a ring of fairly consistent -75c cloud tops.

The most recent microwave image showed a nearly complete eyewall, though still open on the northeast side and the one banding feature displaced to the west. Based on the dramatically improved infrared structure, it can be safely assumed the eyewall is now completely closed.

The system remains cocooned in a favorable environment characterized by low vertical wind shear, moderate radial outflow with a slight bit of poleward outflow as well. Sea surface temperatures are marginal and may be slightly cooler due to upwelling, but clearly the system has been able to overcome this marginal parameter.

>>> There’s an area of disturbed weather, being referred to as Invest 98B which is located approximately 330 NM east of Colombo, Sri Lanka

Maximum sustained surface winds are estimated at 23 to 28 knots.

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

>>> There’s an area of disturbed weather, being referred to as Invest 90S which is located approximately 193 NM west-northwest of Darwin, Australia

Maximum sustained surface winds are estimated at 23 to 28 knots.

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