Abstract
Daily precipitation amounts ofconvective days, for some 20 May–September seasons (covering periods both before and after activation of the hail suppression), were analysed for 3 stations in the protected and 4 in the unprotected area. A tentative conclusions derived from this study is that precipitation at the protected stations in the period of suppression changed from the preceding period in a way which cannot be explained by similar changes at the unprotected stations. This change is attributed to the inadvertent hail suppression effect. The point estimate of the change is an increase of 23% (on convective days). At the 95% confidence level the estimate shows an increase in the interval (8%, 40%). A rough estimate of theseasonal increase for the protected area is about 30 mm.
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