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Precipatation and ETo for East Tracy, CA <br /> *** Estimated <br /> *Ave. Eto *Ave. Percip. Deep Perc. <br /> Month (in/mo) (in/mo) (in/mo) <br /> Jan 1.24 1.89 0.65 <br /> Feb 1.96 1.68 <br /> Mar 3.41 1.41 <br /> Apr 5.10 0.83 <br /> May 6.82 0.47 <br /> Jun 7.80 0.09 <br /> Jul 8.06 0.03 <br /> Aug 7.13 0.10 <br /> Sep 5.40 0.23 <br /> Oct 3.72 0.52 <br /> Nov 1.80 1.14 <br /> Dec 0.93 1.55 0.62 <br /> Sum: 53.37 in/yr 9.94 in/yr 1.27 in/yr <br /> * Source: California Irrigation Management Information Systems (Zone 12) <br /> (www.cimis.water.ca.gov) <br /> ** Source: Western Regional Climate Center(Station 048999) Oct 1949 to Sept 2004 <br /> (http://www.wrcc.dri.edul) <br /> *** Assumption: If monthly precipitation exceeds potential ET then <br /> the difference is potential deep percolation. <br /> NEIL O. ANDERSON <br /> A N D A S S O C I A T E S <br /> Plate 5 <br />