What happened in December, how our climate outlook for the previous three months turned out, global and local sea temperatures, and our outlook for January to March.
In December 2010 there were more anticyclones (‘highs’) to the east of the North Island than is typical for the time of year, resulting in more airflows from the north and northwest than normal. This resulted in above average temperatures and below average sunshine hours for most places. A severe storm passed over the country on the 27th and 28th of the month, resulting in significant rainfalls, flooding and gale force winds for many areas.
The equatorial Pacific is in a strong La Niña state, which is likely to continue through February and then begin to ease. During Jan-Mar, mean sea level pressures are likely to be above normal over and east of New Zealand.
During Jan-Mar, mean sea level pressures are likely to be above normal over and east of New Zealand. Temperatures are likely to be average or above average in eastern regions and are very likely to be above average elsewhere. Seasonal rainfall is likely to be near normal in most districts, but normal or above normal in the eastern North Island and normal or below normal in the west and south of the South Island.
The climate we predicted and what actually happened.
