Belfast Telegraph

45 to 65 'weather bombs' each year

A "weather bomb" - known as explosive cyclogenesis by meteorologists - happens when there is a rapid fall in pressure in the central section of an area of low pressure.

The level has to fall by 24 millibars in 24 hours in our latitudes to be classed as a "weather bomb".

They happen most frequently over sea near major warm ocean currents, such as the western Pacific Ocean near the Kuroshio Current, or over the north Atlantic Ocean near the Gulf Stream.

Recent estimates suggest there are between 45 and 65 explosive cyclogenesis events a year and that more "bombs" tend to occur in the northern hemisphere.

The Met Office said: "In many ways a 'bomb' can be seen as simply a more powerful, more intense version of the kind of Atlantic low pressure systems that normally affect the UK."

It said the country is feeling the effect of the current "weather bomb" remotely as the track of the low pressure system is well north of the UK.

Although far north-western parts of the country are being hit by 70-80mph gusts, the UK is not seeing the strongest winds associated with the weather system.

The rapid deepening of the low pressure in the current "weather bomb" happened on Monday.

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