What is the minimum wind speed for a storm to be classified as a tropical storm?

A tropical storm is specifically classified as having sustained wind speeds ranging from 39 to 73 miles per hour. The lower limit of this classification starts at 39 MPH. This is a critical point in tropical meteorology; it is the threshold that distinguishes a tropical storm from a tropical depression, which has maximum sustained winds of less than 39 MPH.

Understanding these thresholds is important for the preparation and response to storms, as the classification determines the potential impact and necessitates specific warnings and safety measures. Thus, the correct classification of a storm at 39 MPH aligns with established meteorological standards and ensures appropriate measures are taken for storm preparedness and response.