Topical Cyclone 26S formed early on Saturday morning in the southern Indian Ocean. The cyclone will continue to strengthen as it heads towards northern Madagascar.

As of Sunday morning local time, 26S had winds of 60 mph. It is just over 500 miles from northern Madagascar. Tropical Cyclone 26S is moving to the west-southwest at 15 mph. On this track, the center will reach northern Madagascar on Monday morning local time. It is very possible that it will reach hurricane strength before making landfall.

The circulation associated with the cyclone is very large and a few showers and thunderstorms are already reaching northern Madagascar. The cyclone poses a very dangerous flood threat to the island. Flooding is most likely in northeastern parts of the island, including the capitol city of Antananarivo.

Meanwhile, more rain is falling across the recently flood-ravaged areas of Australia. Coastal New South Wales and coastal Queensland have been hammered with very heavy rainfall over the past week. Flooding has been widespread.

Rainfall totals in the past week have exceeded 12 inches in several areas.

A cold front pushed into the region on Saturday. The cold front will stall out and remain over the flooded areas through early next week. Additional rainfall of 1-3 inches is likely. Isolated amounts of 5 inches or more are possible.

Story by AccuWeather.com Senior Meteorologist Dave Samuhel