Subtropical Storm Karen formed in the North Atlantic on October 10, 2025. and was named by the National Hurricane Center (NHC) at 03:00 UTC. The system is expected to weaken and make its post-tropical transition in the next two days.
Powerful winds and torrential rains produced by Subtropical Storm Biguá wreaked havoc across the Brazilian state of Rio Grande do Sul since its formation on Saturday, December 14, 2024. The storm toppled trees and power lines, and damaged homes, buildings, and infrastructure, leading to at least two injuries in Butiá.
Subtropical Storm "Rebekah" formed over the North Atlantic Ocean at 21:00 UTC on October 30, 2019, as the 17th named storm of the 2019 Atlantic Ocean hurricane season. Rebekah became a named storm at 38.3°N – the farthest north that an Atlantic named…
Subtropical Storm "Alberto" formed in the Gulf of Mexico on May 25, 2018 as the first named storm of the 2018 Atlantic hurricane season. Alberto is expected to slowly move toward the Gulf Coast producing widespread heavy rain. This storm can produce major…
An extremely rare an unique subtropical cyclone formed off the coast of central Chile on May 7 and 8, 2018. The system transitioned from a typical cold core baroclinic mid-latitude cyclone to a shallow warm core cyclone with some deep convection around the center of…
A rare subtropical storm, with characteristics of both a tropical and a non-tropical system, formed on March 11, 2015 near east of the Brazilian state of Rio Grande do Sul, the southeastern most state in Brazil.NOAA's GOES-East satellite provided imagery of the Atla
Subtropical Storm Melissa, formed late November 18th about halfway between Africa and the Americas, will produce rough surf around Bermuda and parts of Bahamas, Turks and Caicos and the Islands of the Caribbean this week.
The MODIS instrument
NASA’s Aqua and TRMM satellites are providing data to scientists about the Southern Atlantic Ocean Sub-tropical Storm Arani, a rare occurrence in the southern ocean. Rainfall data and cloud top temperatures revealed some heavy rain and strong thunderstorms exist in
