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bluewave

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Most areas across the U.S. have experienced an increase in precipitation with the exception of portions of the Western U.S.

 

http://www.wunderground.com/blog/weatherhistorian/comment.html?entrynum=68

 

attachicon.gifprecipmap.jpg

 

 

At some point that will probably reverse.

 

Western U.S. has been susceptible to droughts so much worse than we've seen in the relatively wet recent century.

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I know that NM's increase in precip can be primarily linked to the PDO over the previous several decades.  I suspect that might be teh case for Utah and Nevada as well but I'm not totally sure.

Indeed both the PDO and AMO have strong influences over the US. Interestingly the current drought going on in the west/southwest lines up pretty well with the current -PDO +AMO regime going on.

http://wwwpaztcn.wr.usgs.gov/julio_pdf/McCabe_ea.pdf

drought_freq.jpg

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Indeed both the PDO and AMO have strong influences over the US. Interestingly the current drought going on in the west/southwest lines up pretty well with the current -PDO +AMO regime going on.

http://wwwpaztcn.wr.usgs.gov/julio_pdf/McCabe_ea.pdf

drought_freq.jpg

 

 

Those also line up well with the particuarly wet northeast in the past 30 years or so. (we had a -AMO/+PDO in the 1980s and first half of the 1990s)

 

 

The recent -PDO/+AMO though doesn't match the composite in the upper midwest and lakes. They've been wetter than normal recently while the -PDO/+AMO composite there tends to favor dryness.

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Those also line up well with the particuarly wet northeast in the past 30 years or so. (we had a -AMO/+PDO in the 1980s and first half of the 1990s)

 

 

The recent -PDO/+AMO though doesn't match the composite in the upper midwest and lakes. They've been wetter than normal recently while the -PDO/+AMO composite there tends to favor dryness.

 

NNE has also been wet lately, and had near normal precip in the 1980s and early 90s, unlike the composites.

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