NAM extreme days
over 1948-1997
by calendar month
Nov
Dec
Jan
Feb
Mar
Extreme
High NAM
13.3%
(167)
18.8%
(237)
23.1%
(291)
22.6%
(285)
22.2%
(280)
Extreme
Low NAM
13.3%
(167)
17.4%
(219)
24.4%
(308)
20.8%
(262)
24.1%
(304)
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