During September 2023 the jet stream axis across Argentina has averaged 25-45 mph stronger than normal. The 15-day forecast maintains the rapid jet stream forecasting 100-160 knots across Argentina. Meanwhile, just the opposite pattern counters that fast upper flow with titanic high pressure featuring much lighter than normal wind across Brazil.

The 12Z GFS develops a low-pressure area well northeast of the Bahamas late tomorrow with steady strengthening as the system moves north and northwest and inland eastern North Carolina Saturday morning. From there, the system weakens while inland drifting slowly to Delaware by Sunday evening.

A major concern for summer 2023-24 in the southern hemisphere is a major drought in South America (Brazil) and Australia somewhat related to the developing El Nino climate and contributions by the positive phase Indian ocean dipole (+IOD). Early season torrid heat is developing across Australia.

The HRRR model projects the strongest wind gusts at mid-afternoon tomorrow throughout the coastal New England region including potential hurricane force gusts on the mid-to-upper Maine coast. At that time, high gusts continue as far south as Cape Cod.