A tropical storm becomes a tropical depression if it weakens to the point that it produces winds of less than 39 mph. This can happen for a number of reasons such as moving over land or cold water or encountering dry air or wind shear.
A tropical depression becomes a tropical storm when sustained winds reach 39 mph or greater.
When sustained winds reach at least 39 mph.
Isaac began as a tropical depression.
A tropical depression becomes a tropical storm when sustained winds reach or exceed 39 mph.
No. A tropical depression is a tropical cyclone with winds under 39 mph. A tropical storm is a tropical cyclone with winds from 39 mph to 73 mph.
tropical disturbance, tropical depression, tropical storm, hurricane
Yes. A tropical storm has sustained winds of 39-73 mph. A tropical depression has winds of less than 39 mph.
Katrina was only a tropical depression for a few hours. Soon after forming, Tropical Depression 12 became Tropical Storm Katrina.
Tropical Depression and then Tropical Storm THEN Hurricane!
A tropical depression can become more powerful by intensifying into a tropical storm or hurricane when conditions are favorable. These conditions include warm ocean waters, low vertical wind shear, and ample moisture in the atmosphere. As the storm organizes and strengthens, it can develop a defined center and increased wind speeds, leading to a more mature tropical system.
A hurricane will start as a Tropical Wave. It then becomes a Tropical Depression. A TD is given a number but not a name. Once the TD reaches 39 mile per hour winds its given a name and becomes a Tropical Storm. After reaching 74 mile per hour winds it becomes a hurricane.
If sustained winds reach or exceed 39 mph, a tropical depression becomes a tropical storm.