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Subtropical Depression

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Weather

A subtropical cyclone in which the maximum 1-minute sustained surface wind is 33 knots (38 mph) or less.

NOAA National Weather Service — National Weather Service Glossary

Science› Weather

Hurricane Weather

A subtropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) is 33 kt (38 mph or 62 km/hr) or less.

National Hurricane Center — Glossary of National Hurricane Center Terms retrieved 2014-05-26