blog ITCZOnly near the Intertropical Convergence Zone do conditions occur in which a ripple of instability in the air can become a storm strong enough to devastate whole cities or islands.

The sea in this area has a surface temperature of over 80F (27C), above which an intense area of low pressure can develop into a storm. It is also far enough from the equator for the earth’s spin to make the storm rotate.

Water vapour from the warm seas is drawn into the areas of low pressure. It rises and condenses into banks of clouds intensifying the inward flow of air. Energy is released in torrential downpours and the winds can measure at and up to 190miles (300km) per hour. However, in the central “eye” of the storm, the skies are calm and clear.