Tropical cyclones: extra-tropical transition

On average, about nine tropical cyclones form in the South Pacific tropics between November and April. Three or four of these leave the tropics and nearly all of them undergo a marked transformation to a mid-latitude depression – a completely different weather system – before they reach New Zealand. For a while after this extra-tropical transition, the system may be referred to as “low formerly cyclone so-and-so”.

Myth-busting Windburn

This post was written by Wayde Beckman from the Health Sponsorship Council.

“I got windburnt today.”  “My lips feel windburnt.”  It’s something we hear from time to time (and even say ourselves) to explain red, sore, dry skin or lips after being outside.  And in this glorious country of ours, it’s hard to be outside and not feel the sweet caress (or fierce pummeling) of the wind.  But what is windburn?  And can the wind really burn our skin?

New feature for "towns & cities" - Past Weather

We have added a new feature to the "towns & cities" section on "Past Weather" is now located below the ten day forecast for most locations showing wind, air temperatures and rainfall in a graphical format.

The graph shows the elements for yesterday, the last 7 days, and the last 30 days, as well as 'historical' on a calendar monthly basis. The data is detailed further upon mouse-over and includes:

- the highest wind gust
- the direction the wind was blowing from
- the highest and lowest air temperatures; and
- rainfall

The New Zealand Pollen Forecast

Written by:

Dr David Fountain, Associate Professor Plant Biology (Retired), Institute of Molecular BioSciences, Massey University

Summer is the time of year when there's lots of pollen - and hayfever - around. Pollen grains are shed from flowering plants and are typically 15 to 50 millionths of a metre across - about the same width as a human hair.