- Large dots - days when both SNOW and NAM were "extreme"
- Small dots - days when SNOW, NAM, or both were not "extreme"
- Red horizontal line - threshold for extreme high NAM
- Blue horizontal line - threshold for extreme low NAM
- Grey thick vertical line - mean daily SNOW for all days, including those with zero amount
- Black thin vertical line - threshold for extreme SNOW
- Yellow vertical-to-curving diagonal line - least squares best-fit regression line for SNOW vs NAM, calculated using all days with observations, including those with zeros amount
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