During September La Nina conditions strengthen as indicated by the increasing negative sea surface negative (colder than normal water) in the equatorial Pacific.Currently, La Nina is not as strong as was in September 2010. Only one of the models predicts the La Nina to strengthen during the fall/winter 2011-2012 with the others only indicating a weaker event.
La Nina conditions over the Northern Hemisphere favor a northern strong track which would be favorable for normal or above precipitation over Wasatch of Utah, the Sawtooth Range in southern Idaho and the Rockies of Colorado. Just yesterday, this area received its first significant snowfall of several inches of snow above about 7000 feet.
Will update the progress of La Nina each month in this blog.
Information for this blog was provided by the Climate Prediction Center of the National Weather Service.
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