White Christmases at Boise
                           1939 - 2009
              >= 1 inch on ground, airport, 0500 mst

   Year         Snow Depth         Years with Measurable Falling   
                                        Snow Christmas Day

w+ 1941             1"                c  1954         <.5"      
w- 1948             1"                w  1965         1"
c+ 1949             2"                c+ 1966         3"
w+ 1951             2"                c  1981         <.5"  
w  1952             1"                   1983         3"
w  1965             2"                c+ 1988          .5"   
c+ 1966             3"                   1990         1.7"
c+ 1975             1"                   1996          .8"
c  1981             2"                   1998         6.1"
w+ 1982             3"                   2008         1.4"
   1983             9"                    
   1984             6"                   probability = 14%
   1985             3"
c+ 1988             4"
   1990             6"
   1996             4"
   1998             3"
   2008             4"

   probability = 25%

c = la nina  w = el nino

weak     c- or w-
moderate c or w
strong   c+ or w+
no nino  [blank]

1/4/2012

white christmases at boise.txt