* Tropical depressions: These are the weakest type of tropical storm and have maximum sustained winds of less than 39 miles per hour (63 kilometers per hour).
* Tropical storms: These storms have maximum sustained winds of between 39 and 73 miles per hour (63 and 118 kilometers per hour).
* Hurricanes: These are the most powerful type of tropical storm and have maximum sustained winds of at least 74 miles per hour (119 kilometers per hour).
Mid-latitude storms
* Extratropical cyclones: These are large-scale storms that occur in the middle latitudes of the Earth. They are also known as mid-latitude depressions or wave cyclones.
* Nor'easters: These are storms that occur along the east coast of North America. They are typically characterized by strong winds, heavy rain, and snow.
* Blizzards: These are severe snowstorms that occur in the northern United States and Canada. They are characterized by strong winds, heavy snow, and low visibility.
Polar storms
* Polar lows: These are small-scale storms that occur in the Arctic and Antarctic regions. They are characterized by strong winds, heavy snow, and low visibility.
* Whiteouts: These are conditions of extremely poor visibility caused by blowing snow. They can occur in both polar and mid-latitude regions.