COMMENTARY:
The far-eastern equatorial Pacific has remained close to zero in recent months. Furthermore, a large body of anomalously cool water remains in the subsurface of the eastern equatorial Pacific, increasing the chances of further cooling at the surface. The current weekly values of the eastern and central Pacific indices remain close to zero, whilst NINO4 in the western Pacific is also now close to zero: NINO3 (eastern Pacific) and NINO4 are both +0.1°C and NINO3.4 (central Pacific) is +0.2°C for the week ending 29 April. Many computer models predict further cooling of the eastern Pacific over the coming months.
The POAMA model, run at the Bureau of Meteorology, generates a new forecast every day for the following eight months based on the latest observations. The average of the most recent 30 model runs suggests the NINO3 temperature will cool, with the index falling to −1.8°C in June and warming slightly until the end of the year, though still remaining below La Niña thresholds.
For the 30 runs of POAMA between 31st March and 29th April, the distribution of NINO3 temperature anomalies averaged over SEPTEMBER is as follows:
below −0.8°C: 77% (Cool)
−0.8°C to zero: 23% (Neutral)
zero to +0.8°C: 0% (Neutral)
And similarly for DECEMBER the results are:
below −0.8°C: 66% (Cool)
−0.8°C to zero: 34% (Neutral)
zero to +0.8°C: 0% (Neutral)
Similar data for other months can be accessed by following the "POAMA" link in the table above.
For September, six of the eleven models available predict cool ENSO conditions, while five show neutral conditions. By December four models (of eight available) predict cool conditions, with four predicting neutral.
However, the March to June period is known as the "predictability barrier" and model skill is at its lowest predicting across this span of months. Users should therefore exercise caution when interpreting forecasts for the end of 2007, and are encouraged to view the actual model outputs by following the web links. Frequent updates of the latest observational data with relevant commentary are available on the Bureau's ENSO Wrap-Up page.
This survey last updated 1st May 2007.
Next update expected in late May 2007.
I think we SHOULD take actions because of things are getting worse in the world. Forecasters better keep going through all models and saying theres COULD be something is wrong or even are wrong. We have to keep things up for our actions get along with climate change before massive climate failure in the future.
Climate here in Australia lately is changed because all high pressures cells are moving south again to create us into "back to summer" weather. Temperatures at night still cold BUT it's increasing indices although max temperatures increasing much higher than 30C for again. Max here tomorrow is 30C which is 6C above average. Here the weather charts from weatherzone:
http://www.weatherzone.com.au/charts/isoba...n.jsp?chart=sumIt conveys alot more heat troughs and further south high pressure cells of that no more cold fronts for mainland. I afraid of that we would dip into warmest winter on record as we know medival period. Rainfalls by OCF website showing much higher rain days and amount end of next week, therefore temperatures ARE still very warm to hot.
Last year, into May, weather was much alot cooler like into averages and more thunderstorms including cold fronts. Snow has started in early June last year which was ripper. I can't see any signs of Winter.