Tests run for natural snow deposition on asphalt pavement treated with highway and airport runway deicing chemicals demonstrate that, for conditions of strong wind and cold temperatures, these chemicals can have a deleterious effect. Friction is assumed to be the primary criterion for judging chemical efficacy. Statistical correlations with meteorologic data support observations that some conditions that produced scouring on nonchemically treated pavement caused snow to accumulate on areas that had been treated with deicing chemicals.