"A deep area of low pressure to the south-east of New Zealand's North Island swept into the region on Sunday, bringing heavy rain, gale-force winds and dangerous coastal swells that lashed exposed shorelines. The storm triggered power outages, forced evacuations and damaged infrastructure, with further impacts likely on Monday as the system lingers for a time, before tracking southwards later."
"The unusually persistent system developed when a cold front tracking east across the country late last week merged with a strengthening low-pressure system offshore, causing it to deepen. It then became trapped between two blocking high-pressure systems, stalling in place and subjecting the same communities to prolonged heavy rain. A humid air mass of tropical origin has fed additional moisture into the storm, further intensifying downpours."
A deep low southeast of New Zealand's North Island brought heavy rain, gale-force winds and dangerous coastal swells that lashed exposed shorelines. The storm caused power outages, forced evacuations and infrastructure damage and is expected to linger into Monday before tracking south. Recent flooding in the Otorohanga district left a man dead after his vehicle was submerged. Some areas recorded over 100mm of rain in 24 hours, notably Gisborne, Hawke's Bay and the Bay of Plenty, while Tararua and Wairarapa reported similar totals and coastal winds near 80mph. The system deepened and stalled after a cold front merged with an offshore low and was fed by humid tropical air, looping rain bands over saturated ground and increasing flood risk. Storm Nils struck western Europe with extreme winds, fatalities and widespread power outages, prompting flood alerts and avalanche concerns.
Read at www.theguardian.com
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