- Large dots - days when both TMAX and NAM were "extreme"
- Small dots - days when TMAX, NAM, or both were not "extreme"
- Red horizontal line - threshold for extreme high NAM
- Blue horizontal line - threshold for extreme low NAM
- Grey vertical line - mean TMAX for all days
- Black vertical lines - thresholds for extremes of TMAX
- Yellow vertical-to-diagonal line - least squares best-fit regression line for TMAX vs NAM
- If the amount of variance in TMAX explained by NAM is at least 1%, this r² value is shown in the lower right
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