Comments on the Griffith et al. Report on Operational Cloud Seeding Programs in Utah

Bernard A. Silverman


The report by Griffith et al. (2009) on operational cloud seeding programs in Utah states the following conclusion: "The NAWC (the Utah programs seeding contractor) utilized an historical target/control regression analysis technique to estimate the effects of cloud seeding in the various target areas in Utah. These analyses suggest average seasonal effects ranging from 3-21%."

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