NEWS
Bryce Anderson DTN Ag Meteorologist and DTN Analyst
Tue Sep 23, 2014 10:29 AM CDT

We are seeing some interesting developments in the Pacific Ocean. The Pacific Ocean Southern Oscillation Index (SOI) value reached a reading of -8.2 on the 90-day moving average this week--on Monday, September 22nd. That is a notable value, because research done by Iowa State University has identified the 90-day SOI reading of -8.0 or lower as an indicator of sufficient El Nino intensity to be an influencing factor in the weather patterns over the interior U.S. As a corollary, a 90-day reading of +8.0 or higher is an indicator of La Nina influence for the interior U.S.

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