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Climate Monitoring
The Utilities Division is interested in snowpack and summer precipitation patterns. This past winter season was an El Nino pattern but the moisture stayed north of Arizona. The graph at right shows a shift from the historical annual rain to snow relationship. In the last 3 of 15 water years our annual precipitation has gone from about 50% to 70% rain to 80% rain with 20% of all precipitation falling as snow. Production staff have seen significant runoff into Upper Lake Mary occur when rain falls on snowpack. A warming climate is a concern for many water providers in the southwestern US that rely on winter snowpack to recharge surface water supplies. Utilities will incorporate this and other climate scenario planning into its next Water Resources Master Plan. 

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