Six Tropical Storms Simultaneously Active in the Southern Hemisphere

On February 25, 2025, six tropical storms were reported in the Southern Hemisphere, including Cyclones Honde and Garance. This phenomenon, the first of its kind since 1989, resulted from La Niña influences, resulting in significant rainfall and wind forecasts. The current storm season is above historical averages, with predictions indicating ongoing severe weather impacts.

On February 25, 2025, the Southern Hemisphere experienced an unusual scenario with six tropical storms concurrently active in the Indian and Pacific Oceans. This occurrence marks the first time such simultaneous cyclones have been noted since 1989. The ongoing tropical storm season in this region typically spans from November through April, heightening concerns related to their impact.

Three tropical cyclones were observed in the South Pacific, alongside another three in the southern Indian Ocean, effectively matching the previous record for concurrent storms. Cyclone Honde off Mozambique, Cyclone Garance near Madagascar, Hurricane Bianca near Australia, Hurricane Alfred northeast of Australia, and Cyclones Sera and Rae near New Zealand constituted this unprecedented meteorological event.

Meteorologist Jason Nicholls from AccuWeather indicated that factors contributing to the prolific storm activity include low wind shear and elevated sea surface temperatures, both influenced by the La Niña phenomenon. As of Tuesday, advisories for Cyclone Rae were concluding while Cyclone Honde was just forming; Cyclone Rae had already inflicted damage in Fiji.

Accumulated Cyclone Energy for the season is significantly exceeding historical norms, with 166.3 recorded on Wednesday, suggesting an energetic season ahead. This is the first time since January 1999 that three tropical cyclones have overlapped in the South Pacific, while a similar event in January 2021 did not officially qualify due to technical naming discrepancies.

As Cyclones Honde and Garance approached Madagascar and Reunion Island, significant impacts were anticipated. Heavy rainfall and gusty winds were forecasted for southwest Madagascar, with expected accumulations of 12 to 24 inches and localized totals reaching 48 inches. Wind gusts could reach up to 100 mph along the southern coast.

In summary, the concurrent formation of six tropical storms in the Southern Hemisphere is a significant meteorological event. Factors such as La Niña and elevated sea surface temperatures have contributed to this phenomenon, leading to potential heavy rainfall and storm effects in affected regions. The ongoing storm season is already showing signs of heightened activity compared to historical averages, warranting close monitoring and preparation for implications on local communities.

Original Source: www.accuweather.com