New Zealand often gets hit by storms as it lies in the ‘Roaring Forties’, between 40 and 50 degrees latitude south, where mild air temperatures from the north meet cooler air from the south.
Storms can cause strong winds, rain, thunder, lightning, hail, heavy snow and rough seas. A strong wind warning is issued by MetService when winds of more than 87 kilometres per hour (kph) are expected over land.
Tropical cyclones are large revolving storms that develop in the tropics. They are also called hurricanes or typhoons. They have a wind-speed of more than 120kph.
Tropical cyclones usually weaken as they meet the cooler sea temperatures around New Zealand, but sometimes they can cause major damage. In 1988, Cyclone Bola caused more than $200 million in damage, even though it was no longer a tropical cyclone by the time it reached our shores.
Storms can destroy roads, railways, bridges and buildings. Crops can be ruined and livestock killed. At sea, ships are at risk (the ferry Wahine sank during Cyclone Giselle in 1968, with the loss of 51 lives). Dangers from storms include fallen trees and poles, torn-off roofs, fast-flowing currents in streams and rivers, flying objects, landslides and flooding. Coastal areas can suffer from storm surges, which are extra-high waves caused by low pressure in the air above the sea that causes the sea-level to rise.
Stay indoors and listen to the radio.
Avoid dangling and broken power lines.
Find out more about what to do before, during and after a storm.
Make a plan with your family to get through an emergency. Think about the things you need every day and work out what you would do if you didn't have them.
Make your plan — print it out, stick it on the fridge and make sure everyone knows the plan.
Find out about past storms that have happened in your region.
Find out more by reading online.
Choose one of these resources to email to a friend or family member.
A New Zealand perspective on severe weather from Te Ara, the Encyclopedia of New Zealand.
Keep up to date with MetService weather forecasts.
Search MetService blogposts by keyword.
Witness huge storms, heavy rain, powerful tornadoes, intense lightning, dust storms, dangerous plane landings, giant hail and other extreme conditions in these weather video clips.
National Geographic's kids weather playlist on Youtube.
Earthquakes, floods, landslides, storms, tsunami and volcanic activity can be frightening because they can strike at any time and often without warning. Explore the types of emergencies below and learn better ways to prepare.