Note DetailLa Nina likely in June
5/31/2010 7:18:00 AM

The SOI (measure of atmospheric pressure associated
with El Niño & La Niña) was in neutral range during
May, but progressed significantly toward La Niña
(from -0.54 to +0.41, where +0.8 is considered
La Niña).   It is likely that La Niña
conditions will be reached during the month of
June.  This would indicate a substantial increase
in corn yield risk for the U.S. , shifting the
likely hood of a below trend yield from about 50/50
to 70%.  Most of the risk increase would be in the
central and eastern areas of the Corn Belt.  
              E. Taylor 

Iowa State University Extension