Your web browser (Internet Explorer) is out of date. Some things will not look right and things might not work properly. Please download an up-to-date and free browser from here.

Video: Evan’s path to NZ + Xmas Day!

We track Tropical Cyclone Evan’s track to NZ and finally a look at how Christmas Day is shaping up.


Mark on 19/12/2012 7:43pm

Looking at the movement of Evan it appears to be drifting to the east of NZ – is this correct?

WW Forecast Team on 19/12/2012 8:13pm

Yep on the sat map looks very much to the east, but we think the low will curve back more towards the upper NI over the next 48 hours – there is a huge blocking high hard up to the east of Evan, so it can’t move much further east than it is now.



Guest on 19/12/2012 4:46am

Met service 7 day is now using ecmwf data.

Guest on 19/12/2012 2:44am

Have you seen the Metservice 7 day forecast? They have the remnants of Evan tracking into the middle of the Tasman, quite different form you model. Are they basing that on the European model?

WW Forecast Team on 19/12/2012 4:07am

The models are changing over and over. In fact the European one (ECMWF) has picked the Tasman the entire time.  GFS (American) picked it going just east of Hawkes Bay.  Weathermap – based in New Zealand – use GFS but also their own local data, which saw a more sensible ‘half way’ prediction – basically in the middle of the two models – which is the North Island pretty much.

All the models are flip flopping on where Evan’s remnants go AFTER Christmas Day – but regardless its still a pretty similar forecast for NZ. 

Unsure where MetService get their modelling from – we don’t use it.  We use the three mentioned above along with JTWC (but only for cyclones).

Modelling can be wildly changeable especially when you go beyond 5 days…so the forecaster who uses them must know which ones to trust – and when to not trust them. 

It has the potential to go into the Tasman or the Pacific – like an egg on a rooftop, so is this low on the top of NZ!

– Phil

Related Articles