Late frosts

Earlier in the September 2009 many parts of New Zealand had frosts. This is the beginning of spring so 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.

Bottle-necks

Our weather in New Zealand is greatly modified by the shape of the land. There are many parts of the country where the air is channelled through gaps in the terrain, and I thought I would write a little about this. Especially since it relates to the thread of my earlier posts on wind.

21 August - Anniversary of Meteorological Service in NZ

On 21 August in 1861, Dr. Charles Knight was appointed the first Director of Meteorological Stations in New Zealand.

His appointment marked the founding of the New Zealand Meteorological Service – this country’s oldest continuous scientific institution. Early missionaries and settlers quickly realised our coasts were subject to rapid changes of weather, with frequent violent storms. In the 1840s and 1850s weather studies were made by military officers, but in 1859 the government put weather stations on a more formal footing.

The mid-July northern low

Written By Jonathon Tunster, Meteorologist

On the night of 17th July 2009 and early on the 18th, New Zealand was affected by a fast-moving and rapidly deepening depression originating in the north Tasman Sea. Sustained southwesterly winds of more than 60 knots were recorded in Colville Channel as the low passed by. Severe Weather Warnings were issued for wind in Coromandel/Great Barrier Island and rain in the eastern North Island.

Year 12 Maths, Trainee Meteorologists

Part of my job as a teacher of meteorology is to go to NZ universities looking for future meteorologists. It breaks my heart when, sometimes I meet a person with a genuine passion for the weather who would love to work for us as a meteorologist, but just can't cope with the required maths. Unfortunately for them, professional meteorologists need to have some university maths under their belts. And this requirement isn't just a local thing - it also comes from the World Meteorological Organisation of which we are a member nation.

The Great Northwesterly Storm of August 1975

If you were in New Zealand in the mid '70s you may remember a particularly strong wind-storm that devastated many parts of the eastern South Island. It struck on 1 August 1975, doing a huge amount of damage to pine trees in the Eyrewell and Balmoral forests in particular. To give you an idea of the power of this storm, some of the peak recorded winds and gusts were:

 mean wind (including gusts and lulls) strongest gust Christchurch Airport 126 km/h172 km/hTimaru Airport130 km/h165 km/hEyrewell Forest119 km/h170 km/h