A ‘weather bomb’ to hit New Zealand later today
MetService New Zealand, via Facebook
The 'bomb low', which means a rapidly deepening low pressure centre, is currently in a juvenile phase out in the Tasman. It sits under the polar exit of a jet stream, which enables the rapid deepening. This, combined with a strong boundary between warm and cold air, give it the energy required to start to rotate and deepen into a bomb low.
Although the low centre is not going to reach New Zealand until around 10pm tonight, strong winds and rain ahead of it are already affecting the West Coast of the South Island. These spread north through the day to central NZ, with a clutch of warnings and watches. Check http://bit.ly/AllWarnings for more.
Apologies for the wrong date on the image, it is from 8:10am today, 18/1/2017!
Trolley buses in Wellington have been cancelled as the Capital battens down the hatches for the weather bomb hitting New Zealand on Wednesday.
Rain getting going on the West Coast with the odd thunderstorm, and some spreading across to the east too. Check http://bit.ly/NZRainRadar^TA
Warning for gusts>150km/h Weds evening, but how windy is that? Warnings issued when gusts >110km/h, so this is an exceptional event. ^TA