Sidney, Nebraska

... Winter Storm Watch in effect from Tuesday evening through
Wednesday evening...

A Winter Storm Watch is in effect from Tuesday evening through
Wednesday evening.

* Timing... snow will begin to fall Tuesday evening and intensify
late Tuesday night and early Wednesday. Snow will continue
during the day on Wednesday... before gradually tapering off
Wednesday night.

* Total snow accumulations... storm total snowfall of 4 to 7 inches
will be possible east of the Laramie range by late Wednesday.
Higher amounts will occur in the southern Laramie range... where
5 to 10 inches of new snow is likely.

* Winds/visibilities... east winds of 5 to 15 mph Tuesday night
will turn northerly during the day on Wednesday.

* Impacts... travel conditions are anticipated to become adversely
impacted in falling snow late Tuesday through Wednesday night.

Precautionary/preparedness actions...

A Winter Storm Watch means there is a potential for significant
snow... sleet... or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

... Cheyenne Christmas climatology since 1946...

From 1946 through 2008... the average high temperature on
Christmas day in Cheyenne has been 40.5 degrees and the average
low temperature has been 17.4 degrees.

What are the chances for a white Christmas in cheyenne?

A trace or more of snow has fallen on Christmas day in Cheyenne
15 of the past 63 Christmas days or 24 percent of the Christmas
days.

0.1 inch or more of snow has fallen on Christmas day in Cheyenne
11 of the past 63 Christmas days or 17 percent of the Christmas
days.

1 inch or more of snow has fallen on Christmas day in Cheyenne
3 of the past 63 Christmas days or 5 percent of the Christmas days.

Here are the top ten snowiest Christmas days in Cheyenne since
1946.

Snowfall (inches)... year
2.6... 2000
1.6... 1978
1.4... 1983
0.7... 1964 and 2007
0.6... 1997
0.4... 1967
0.3... 1973
0.2... 1990
0.1... 1988 and 1996

What are the chances of having snow on the ground Christmas morning?

A trace or more of snow has been on the ground Christmas morning
in Cheyenne 36 of the past 63 Christmas days or 57 percent of the
Christmas days.

One inch or more of snow has been on the ground Christmas morning in
Cheyenne 22 of the past 63 Christmas days or 35 percent of the
Christmas days.

Five inches or more of snow has been on the ground Christmas
morning in Cheyenne 5 of the past 63 Christmas days or 8 percent of
the Christmas days.

Here are the highest Christmas morning snow depths in Cheyenne since
1946.

Snow depth (inches)... year(s)
9... 1948
6... 1998
5... 1982... 1983... 1987
4... 2006
3... 1962... 2000
2... 1985... 1997
1... 1958... 1967... 1970... 1973... 1974... 1978... 1981... 1989... 1990
... 1992... 1993 and 2007.

Here are the top ten warmest Christmas high temperatures in
Cheyenne since 1946.

High temperature (degrees)... year
60... 2005
59... 1955
58... 1959 and 1971
57... 1980 and 1994
56... 1950
53... 1961 and 1963
52... 1947 and 1979

Here are the top ten coldest Christmas high temperatures in
Cheyenne since 1946.

High temperature (degrees)... year
10... 1962
17... 1987
19... 1983
21... 1990
22... 1948
23... 1997
24... 2000
25... 1982
28... 1949 and 1967

Here are the top ten coldest Christmas low temperatures in
Cheyenne since 1946.

Low temperature (degrees)... year
-13... 1987
-10... 1962
-1... 1983
0... 1952
1... 1996
2... 1948 and 1990
5... 1978 and 2007
7... 1974 and 2000

Here are the top ten warmest Christmas low temperatures in
Cheyenne since 1946.

Low temperature (degrees)... year
44... 1980
38... 2005
35... 1946
33... 1955
32... 1963
30... 1957 and 1971
29... 1959 and 1979 and 1985

Christmas day high temperatures from...

10 to 19 degrees have occurred 3 times or 5 percent.
20 to 29 degrees have occurred 7 times or 11 percent.
30 to 39 degrees have occurred 14 times or 22 percent.
40 to 49 degrees have occurred 25 times or 40 percent.
50 to 59 degrees have occurred 13 times or 21 percent.
60 to 69 degrees have occurred 1 time or 1 percent.

Christmas day high temperatures...

70 degrees or higher have occurred 0 percent.
60 degrees or higher have occurred 2 percent.
50 degrees or higher have occurred 22 percent.
40 degrees or higher have occurred 62 percent.
30 degrees or higher have occurred 84 percent.
20 degrees or higher have occurred 95 percent.
10 degrees or higher have occurred 100 percent.

Less than 70 degrees have occurred 100 percent.
Less than 60 degrees have occurred 98 percent.
Less than 50 degrees have occurred 78 percent.
Less than 40 degrees have occurred 38 percent.
Less than 30 degrees have occurred 16 percent.
Less than 20 degrees have occurred 5 percent.
Less than 10 degrees have occurred 0 percent.

Christmas day low temperatures from...

-20 to -11 degrees have occurred 1 time or 1 percent.
-10 to -1 degree have occurred 2 times or 3 percent.
0 to 9 degrees have occurred 13 times or 21 percent.
10 to 19 degrees have occurred 18 times or 29 percent.
20 to 29 degrees have occurred 22 times or 35 percent.
30 to 39 degrees have occurred 6 times or 10 percent.
40 to 49 degrees have occurred 1 time or 1 percent.

Christmas day low temperatures...

50 degrees or higher have occurred 0 percent.
40 degrees or higher have occurred 2 percent.
30 degrees or higher have occurred 11 percent.
20 degrees or higher have occurred 46 percent.
10 degrees or higher have occurred 75 percent.
0 degrees or higher have occurred 95 percent.
-10 degrees or higher have occurred 98 percent.
-20 degrees or higher have occurred 100 percent.

Less than 50 degrees have occurred 100 percent.
Less than 40 degrees have occurred 98 percent.
Less than 30 degrees have occurred 89 percent.
Less than 20 degrees have occurred 54 percent.
Less than 10 degrees have occurred 25 percent.
Less than 0 degrees have occurred 5 percent.
Less than -10 degrees have occurred 2 percent.
Less than -20 degrees have occurred 0 percent.