Tropical Storm:A tropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) ranges from 39 mph to 73 mph. Major hurricane: A hurricane that is classified ...

Image credit: NOAA/CIMSS/UM-Madison. The two almost Cat 5s of 2017. Two tropical cyclones just missed achieving Category 5 status in 2017, topping out with 155 mph winds ...

The Cyclone Center project began in September 2012, and since that time more than 20,000 citizen scientists have completed almost 400,000 image evaluations. But we still have a ways to go and we ...

Though it had been downgraded to a tropical depression by Saturday morning, Patricia's intensification was one of the most dramatic of any hurricane, cyclone, or typhoon on record.

The official start of Atlantic Hurricane Season is less than six weeks away, and forecasters will be getting an essential upgrade just in time for the season to begin.

In the coming days, two weather systems could become tropical cyclones in the Atlantic. Here's why that is strange for June. ... CIMSS and NOAA. Editorial Standards Reprints & Permissions.

Cyclone Kelvin as it made landfall in Northwest Australia as a Category 1 storm on 18 February 2018. Kelvin continued to intensify after making landfall, with estimated winds of 80 gusting to 100 ...

Mooney said CIMSS is one of 20 NOAA-sponsored Cooperative Institutes. CIMSS is engaged in satellite research, applications, sensors and techniques. The institute also works on environmental models and ...