The green "N" refers to "Normal"; the red
"A" refers "Above Normal" and the "B" refers to "Below Normal".
The blue "40", "50", "60", etc. refer to
the probability of above chance that it will be below normal in the eastern
U.S.
The green "N" refers to "Normal"; the red
"A" refers "Above Normal" and the "B" refers to "Below Normal".
The blue "40", "50", "60", etc. refer to
the probability of above chance that it will be below normal in the eastern
U.S.