Feared intensification of a recurving hurricane has occurred. Since midnight, the lowest pressure has collapsed from 952 to 942 MB indicating Ian is now a catastrophic category-4 major hurricane. The top wind is now near 140 mph. Hurricane force wind extends to 35-40 miles from the eye. Ian will move inland near Port Charlotte later today without much change in intensity.

Based on the ECMWF guidance, Climate Impact Company projects another half-dozen tropical cyclone events in October biased toward the Western Caribbean Sea to the Bahamas. An additional 2 or 3 hurricanes is anticipated.

Madden Julian oscillation shifts to phase_4/phase_5 and strengthens over the next 2 weeks according to ECMWF. The convection pattern in the tropics of the West Pacific suggests this pattern has already developed. An increase in West Pacific tropical cyclone activity and above normal rainfall stretching from Southeast Asia to Australia is likely. Conversely, the subsidence phase of MJO shifts across South America.

ECM "weeklies" have been helpful identifying periods of anomalous rainfall in the deep tropics/subtropics implying presence of tropical cyclone activity. The model is persistent at producing that risk for the west-central/central North Atlantic tropics/subtropics through October.