March 2010 to Sep (first period) - Sep to March 2011 (second period) for U.S.
A progressive pattern of troughs and ridges is the main theme for the entire forecast periods - with significant changes in the second period ( fall-2010 winter-2011spring ) -
This progressive pattern First Period - has produced many scattered to moderate precipitation storms for most of the U.S giving near normal precip for much of the country -
The second period See's some major changes -
The country as a whole should receive near normal precip with numerous progressive storms - with some major storms for the Mid-Atlantic East Coast -
The West Coast-Inter mountain area to Colo will have numerous progressive strong and wet troughs - the entire West Coast and Inland to Colo should receive at least normal precip with many area's much above normal -
On the whole - frequent large changes in temperature and many frequent passing troughs for most of the country -