The weather pattern was almost perfect for the 2009 Coastal Classic
In my previous blog post I pointed out that tropical lows and cyclones don't have fronts like the lows we're used to around NZ, but rather, a core of warm air near the centre. I'd like to follow up by further contrasting tropical and mid-latitude lows, and looking a bit more closely at tropical cyclones and how they can affect our weather in New Zealand.
Years ago, I heard the wife of a lighthouse keeper talking on the radio about the weather at Puysegur Point, on the south coast of Fiordland, where she and her husband had been stationed for a time. Six months or so before they arrived there, a fishing boat had gone down in a storm with all hands. One day, as she walked along the black stony beach, something white caught her eye. Bending over, she picked up a single human tooth.
The snow that closed the Desert Road and Napier-Taupo Road on Sun-Mon-Tue 4-5-6th October 2009 was unseasonable. It was caused by a low pressure system deepening over the area at the same time as a cold southerly flow arrived, resulting in moist air being cooled from below in a cauldron of lowering pressure. This produced an unusually heavy amount of snow over a wide area.
The weather map for noon on Sunday shows the low pressure system forming over the Central North Island
A summary of the equinox
I started tramping as a teenager with the expectation of rain in the hills about two days out of three. So we were always prepared to change plans if confronted by a river in flood. Likewise, conditions on the tops could send us scurrying back below the bush line, as the wind over the ridge crests was sometimes strong enough to throw an adult carrying a heavy pack off their feet.
Earlier in the month many parts of New Zealand had frosts. Since we are now into the beginning of spring, it got me thinking about the impact that late season frosts can have on the delicate buds sprouting on trees and vines around the country.
After a week of sunny weather, it appears that rain will dampen Waikato Stadium before this weekend’s Tri Nation rugby game starts there at 7:35pm on Saturday.
This clash between the Springboks and the All Blacks is the first Tri Nations game to be held at Waikato Stadium (capacity 25,800).