Tropical storms
Key conditions for formation
Warm water (temp- 27 degrees +)
Low wind shear (difference in wind speeds) in all parts of the atmosphere
Coriolis effect
Movement of water: warm surface water evaporates and rises before condensing and releases masses of energy- creating an area of low pressure, clouds form and remain unbroken by low wind shear
Storms move to the west via trade winds (blowing eastwards)
As the storm moves over warm water it has a high amount of energy thus a strong relentless storm
As a storm moves over land or cool water then the energy supply in greatly reduced and cut-off thus decreasing the power of the storm
Features 
Eye- the area of calm, 30 miles(50km) across with little winds, precipitation and no cloud cover and high temperature, this is due to a area of very low pressure situated around a column of descending air at the centre of the storm
Eye wall- the strongest area of the storm- strong winds (approx, 160mph), high amounts of rainfall and low temperature
Surrounding clouds/edges of the storm- wind speed decreases and clouds disperse, temp increases
Effects (typhoon Haiyan)
Responses (typhoon Haiyan)
Primary
Secondary
Short-term
Long-term
Buildings/Infrastructure destroyed (1 million homes, $13million damage)
High storm surges (600,000 hectares of farmland flooded
high amounts of flooding
8,000 killed
Airports out of operation (flights grounded)
People maid homeless/jobless
Local/national economy is decreased
Diseases spread due to water contamination
Houses rebuilt
Emergency aid
shelter
food and water
electricity generators
medical aid/first aid
State of emergency declared
fishing warning (not to fish)
Dead need to be buried to prevent disease outbreak
National tourism encouraged to boost economy
Flood defences built, flood resistant homes
$300mn appealed for to help