Question

Write the reasons of natural calamities due to heavy rainfall,heavy snowfall and hailstorm​

Answer 1

Heavy rainfall is one of the most frequent and widespread severe weather hazards to affect New Zealand. It is defined as rainfall greater than 100 mm in 24 hours.

In New Zealand, heavy rainfall is relatively common. Often, a significant amount of precipitation occurs in only a few hours, leading to severe flooding and landslide risk.

Causes of heavy rainfall

Heavy rainfall occurs over New Zealand mainly because of the following common weather systems:

*ex-tropical cyclones

*North Tasman Sea lows moving to NZ region

*depression/lows from the south

*cold fronts.