All low-pressure systems are cyclones. Tropical cyclones are lows that derive their energy from thunderstorms at the centre of the system. These storms thrive on warm ocean waters and benefit from moist air and calm wind shear.

The low pressure area being monitored east of Infanta, Quezon has now become a tropical depression, the state weather bureau PAGASA said on Tuesday afternoon.

A day after the peak of hurricane season, a new tropical disturbance has popped up in the eastern Atlantic. Will it impact South Carolina?

Computer "spaghetti" model runs and meteorologists flagged an eastern Atlantic disturbance in early September as having an increased chance to develop into a t ropical storm, which would be called Gabrielle, with some forecasts showing a westward track toward the Caribbean.

A day after the peak of hurricane season, a new tropical disturbance has popped up in the eastern Atlantic. What to know in Texas.

The National Hurricane Center said a tropical depression is likely to form by the middle to later part of this week.

Tropical Storm Mario has formed off Mexico’s Pacific coast and is expected to bring wind, rain and possible flash flooding, forecasters said.

The Dominican Institute of Meteorology (Indomet) is monitoring a tropical wave over the Atlantic that is producing scattered rainfall and disorganized thunderstorms. The system has a 30% chance of developing into a cyclone in the next 48 hours,

Post-tropical cyclone Lorena could bring heavy rainfall across parts of the Southwestern United States, the National Hurricane Center (NHC) reported Friday morning. Lorena could bring 1 to 2 inches of rain across the Southwest,