>When will the first subzero low be in the lower 48?

Earliest subzero readings since 2000
Information from USA Today

2000
November 3 at South Pass City, Wyo
-3
2001
November 19 at Alliance, Neb and Laramie, Wyo
0
2002
October 22 at Wolf Point, Mont
-1
2003
November 1 at Neihart, Mont
-13
2004
November 2 at Leadville, Colo
-3
2005
November 9 at Wisdom, Mont
-13
2006
October 31 at Valentine, Neb
-6
2007
November 14 at Lake Yellowstone, Wyo
-2
2008
November 6 at Meeker, Colo
-3

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Thanks for reading.
-Mark