Meanwhile another area of concern has evolved in the southwest Gulf of Mexico. NOAA/NHC indicates tropical cyclone risk is 40% within the next 48 hours and >60% after 48 hours. The midday GFS develops this system into a tropical cyclone Friday by midday just north of the central Bay of Campeche. Unclear is whether this system sits in the west-central Gulf of Mexico into early weekend or drifts north toward Louisiana.

Sally is slowly organizing in that the associated convection is becoming more concentric. The interaction between the convection east of Sally and the Florida coastline has eased and dry air entrainment off the Yucatan Peninsula has also dissipated. Northwest shear across Salley is still present but weaker. The environment improves as Sally shifts west and west-northwest and intensification to a hurricane is likely today.

Tropical Disturbance 96L has emerged in the western Bahamas and will drift west-northwest bringing heavy rains to southern Florida this weekend and re-emerge over very warm surface water in the eastern Gulf of Mexico Sunday night beginning to intensify to a tropical cyclone.

The expected broad wetter-than-normal climate pattern across Australia driven by an evolving La Nina appears to develop in the latest NCEP CFS V2 weekly rainfall forecast.