StormZ Basin Intelligence

Early August 2026

North Atlantic

Continued elevated convection activity across the basin from Africa to the US. West Atlantic storm signals show as the highest risk. While the level of storm risk is not as high as the same time last year, the number of locations that show high risk with elevated intensity is enough to consider that the preconditions for an Atlantic forming hurricane are present.

When high risk scoring occurs simultaneously over western Africa and the US East Coast this is a good indicator for formation of a hurricane over the Atlantic Ocean. The persistence of this dual-basin signal is now becoming more significant than its absolute intensity. A strong persistent dual signal historically been associated with hurricane genesis within approximately seven days.

South Pacific / South Indian Ocean

Both the Indian and Pacific basins are now showing elevated activity concentrated in three locations. Mid Indian Ocean around 2000 kms from the West Australian coast, a risk line is displaying high convection activity. There is also a high SPI metric over South Australia, however high water vapour/ outgoing solar radiation overland, unlike over the ocean, is indicative of a boundary condition, not storm activity. An area which is a strong moderator of atmospheric flows. Elevated activity over the Vanuatu - Fiji region.

The unusual high convection risk to the far south of this region has now disappeared, replaced by elevated risk mid Pacific close to the equatorial regions. Possibly ENSO influence, in an otherwise quiet storm regime region. Overall, basin behaviour remains organised rather than explosive, suggesting that persistent large-scale atmospheric structure continues to dominate over isolated convective outbreaks.

StormZ identifies atmospheric preconditioning associated with tropical basin cyclone formation. Storms frequently organise around boundaries. Large scale vorticity is a result of evolution of atmospheric basin-scale energetic organisation. These patterns reflect the rotational and convective energy that precedes major storms. They do not show storm genesis location directly.