Monday, March 18, 2013

St Patricks Day 2013

The last significant rain was in late November . It rained a few millimetres on the Kana parade at the weekend. Our normal non growing season of 2  months is increased this season  to a 4 month dry break .This probably means effective net evaporation of the warm water in Lake Colac of 200-300mm. However the lake is not going back as fast as this figure suggests ( photo to come). Its been dry hot and stable (like the nature of "high pressure"  has been? - slow moving and centred on this latitude)  Maybe the lack of wind is important in the lower apparent evap rate .