MetService Blog

Posts Tagged jet-stream

• The Big Chill - August 14th, 2011 , Written By: Peter Kreft | 8 Comments

2:30pm Sunday 14 August 2011 It’s early days in a weather event which is likely to be memorable for its coldness. Below is a satellite image for midday Sunday. The wind flow over New Zealand is generally from the southwest; the coldest showery air has made its way onto Fiordland, Southland, Otago and south Canterbury. [...]

• A Winter Storm - July 10th, 2011 , Written By: Peter Kreft | 2 Comments

Since Wednesday 6 July, stormy westerly conditions have affected New Zealand. In this blog, we’ll look at why. The “Long Waves” Below is the mean sea level analysis – the weather map – for 6am Sunday 10 July. In between big highs over the mid South Pacific and south of western Australia is a really [...]

• Winds Aloft - June 29th, 2009 , Written By: Chris Webster | 3 Comments

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.   We can get an appreciation of the winds aloft by looking at a loop of images from a geostationary satellite. The Japan Meteorological Agency launched the [...]