Generically if the wind speed reaches at least 64-79 knots the storms are called 'Tropical Cyclones'. However, these storms are also given regional names, if they form over the Atlantic they are also known as a 'Hurricanes' , while if they form over the Indian Ocean they are called a 'Cyclones'. Finally if they form over the Pacific they are called a 'Typhoons'.
fronts
The system of rapidly circulating winds around a center of low pressure that usually brings rain is called a low-pressure area. A low-pressure area may cause a cyclone, such as a tropical cyclone or a mid-latitude cyclone.
A tropical depression is a tropical cyclone with winds under 39 mph. When winds reach or exceed that limit it is called a tropical storm and is given a name. Tropical depression 9 denotes the 9th tropical cyclone of that year in a particular ocean basin.
maritime tropical
A cyclone is a large tropical storm caused by winds rotating around an 'eye', or central area, of low atmospheric pressure. In a cyclone, rapid inward circulation of air masses about a low pressure centre. 'Cyclone' is the generic term for cyclones, hurricanes and typhoons. These tropical storms tend to be called 'cyclones' in the southern hemisphere, and they rotate in a clockwise direction. In the northern hemisphere, where cyclones occur in the Atlantic Ocean and Caribbean, they are called hurricanes and those in the South China Sea and regions of Asia are called typhoons. Northern hemisphere cyclones rotate anti-clockwise, and are sometimes called anti-cyclones.
fronts
The system of rapidly circulating winds around a center of low pressure that usually brings rain is called a low-pressure area. A low-pressure area may cause a cyclone, such as a tropical cyclone or a mid-latitude cyclone.
You are joking....tropical can be found around 18 to 35 degrees
They are mostly called tropical storms or cyclones.
Negatively charged particles in an atom that move around the nucleus are called electrons.
a hifh pressure system
There is such thing as a tropical depression, a type of cyclone. The "depression" part is named after the low-pressure system of the cyclone.
a-plus a low pressure system
There is the blood pressure cuff which wraps around the arm and the pressure guage I believe is called a "sphygmomanometer"
If a storm does not have a circulation, then it is not a hurricane. Such a storm system that might become a hurricane is called a tropical disturbance.
air pressure
One example of a regional low pressure system is the Icelandic Low, also known as the Aleutian Low. Its scientific name is the Icelandic Low, which is a semi-permanent area of low pressure located near Iceland.