21/09/2006

Winter forecast is 'finely-balanced'

Predictions for the weather in the UK this winter are "finely-balanced", Met Office forecasters have warned.

In July, the Met Office suggested that this winter would be milder-than-average and wetter than last year.

However, forecasters have now said that the long-range forecast for this winter across the UK indicates near-average temperatures and an approximately even chance of wetter or drier-than-average conditions for the season as a whole.

The Met Office said that the change was partly due to El Nino conditions becoming established in the Pacific Ocean.

El Nino is a warming in the tropical Pacific Ocean which accompanies a reversal in the trade winds.

It affects the weather and climate across many parts of the globe and is the largest climatic event that occurs on a regular basis anywhere on the planet.

Forecasters said that this is helping to produce a winter forecast that is in the balance and said that these influences could shift probabilities to favour a colder outlook, particularly for late winter 2006/7.

Rob Varley, Head of the Public Weather Service at the Met Office commented: "In July, we issued a first assessment of the winter. This was based on the North Atlantic Oscillation (NAO) technique and indicated a mild winter.

"However, from September, other forecast data becomes available, allowing us to make a further expert judgement on how the winter is likely to play out. It's interesting to note that the chances of a colder winter have increased slightly in light of recent information, with a focus on the late winter period. We will track this possible trend and update the forecast in coming months as necessary."

(KMcA/EF)

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