Keywords:  mph, cyclone, sustained, knot, wind
A subtropical cyclone which has sustained wind speeds of 23 to 38 miles per hour (20 to 33 knots).
A subtropical cyclone in which the maximum sustained surface wind speed (using the U.S. 1-minute average) is 33 knot (62 km/h or 38 mph) or less.
Cyclones that have maximum sustained winds of 33 knots (38 mph) or less. These are referred to as low pressure systems in public advisories and statements.