In my blog post about winds aloft there is a loop of satellite images for a week in winter 2008.  It shows that the big cloud features in the mid-latitudes typically travel from west to east. In other words, the features you see on weather maps affecting New Zealand have usually started out roughly in the area of southern Australia.

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.

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.

When I was biking to work this morning I noticed prolific amounts of pine pollen in the puddles around Westhaven.

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

Written By Chris Webster, Meteorologist

In my previous blog post I wrote about how the winds high in the sky differ from the winds we usually experience on the surface of the Earth.

From Wednesday 01 July 2009, MetService has been providing a Severe Thunderstorm Warning Service. This blog entry explains why we are able to do this, why warnings of thunderstorms are different from warnings of broad-scale weather events, which parts of New Zealand they will apply for, how you can receive them and what actions you can take to protect yourself.

Written By Chris Noble Meteorologist

A call for a new name for a variety of cloud.

Written by Chris Webster, Meteorologist