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Precipatation and ETo for West Tracy, CA <br /> `"Estimated <br /> 'Ave. Eto "Ave. Precip. Deep Pero. <br /> Month (in/mo) (in/mo) (in/mo) <br /> Jan 1.24 2.63 139 <br /> Feb 1.96 2.16 0.20 <br /> Mar 3.41 1.59 <br /> Apr 5.10 0.80 <br /> May 6.82 0.39 <br /> Jun 7.80 0.11 <br /> Jul 8.06 0.03 <br /> Aug 7.13 0.07 <br /> Sep 5.40 0.25 <br /> Oct 3.72 0.63 <br /> Nov 1.80 1.66 <br /> Dec 0.93 1.85 0.93 <br /> Sum: 53.37 in/yr 12.18 intyr 262 in/yr <br /> ` Source: Calitomia Irrigation Management Information Systems(Zone 12) <br /> (www.cimis.water.ce.gov) <br /> *` Source: Western Regional Climate Center(Station 049001) Feb 1955 to Sept 2004 <br /> (hhp://www.wrcc.dri.eduq <br /> Assumption: It 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 />