Record Cold and Snowy December

 

December 2009 across central and north central South Dakota as well as west central Minnesota was a very cold and snowy month with much of the snow coming from the Christmas blizzard. Average temperatures for the month were from 4 to 8 degrees below normal with several locations having one their top ten coldest Decembers on record. The locations in the top ten coldest Decembers were Pierre (sixth), Kennebec (ninth), and Sisseton (tenth).  Mobridge and Timber Lake both had their eleventh coldest December on record.

The Christmas blizzard brought anywhere from 8 to 24 inches of snowfall helping to break many of the December snowfall records.  Most locations finished the month with one of their top five snowiest Decembers on record.   The total snowfall amounts for the month ranged from 14 to 30 inches across central and northeast South Dakota as well as west central Minnesota.  Sisseton, Watertown, and Kennebec all had their snowiest December on record.  Pierre had its second snowiest December on record while Wheaton, Mobridge, and Timber Lake all had their third snowiest December.  Aberdeen finished the month with its eighth snowiest December on record.

DECEMBER

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature/Date

41 / 1st

42 / 1st

47 / 1st

43 / 1st

Coldest Temperature/Date

-20 / 15th

-12 /28 & 29th

-11 / 16th

-19 / 15th

Average High/Departure from Normal

18.6 / -7.1

18.2 / -7.4

18.4 / -7.2

17.6 / -6.4

Average Low/Departure from Normal

3.3 / -3.0

3.9 / -3.6

5.0 / -2.3

3.5 / -2.1

Monthly Average/Departure from Normal

11.0 / -5.0

11.1 / -5.5

11.7 / -4.8

10.5 / -4.3

Precipitation Data

       

Monthly Precipitation / Departure from Normal

0.96 / +0.58

1.94 / +1.48

1.43 / +0.89

1.38 / +0.99

Monthly Snowfall / Departure from Normal

14.1 / +8.3

29.1 / +23.3

15.4 / +9.1

25.0 / +20.4

Most Precipitation in 24 Hours / Date

0.34 / 24-25th

0.55 / 25th

0.43 / 25th

0.24 / 25th

Most Snow in 24 hours / Date

5.0 / 25th

13.9 / 25th

3.9 / 25th

5.8 / 25th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature/Date

44 / 1st

44 / 1st

40 / 1st

43 / 1st

Coldest Temperature/Date

-13 / 15th

-14 / 10th

-20 / 15th

-23 / 15th

Average High/Departure from Normal

21.0 / -10.7

22.3 / -11.0

18.4 / -9.6

19.3 / -9.0

Average Low/Departure from Normal

6.9 / -5.2

5.8 / -5.0

5.1 / -4.0

3.6 / -5.4

Monthly Average/Departure from Normal

14.0 / -7.9

14.0 / -8.0

11.8 / -6.8

11.5 / -7.2

Precipitation Data

       

Monthly Precipitation / Departure from Normal

1.71 / +1.23

1.39 / +1.06

0.87 / +0.49

1.19 / +0.68

Monthly Snowfall / Departure from Normal

22.2 / +17.1

30.0 / +24.4

18.5 / +13.5

24.7 / +18.1

Most Precipitation in 24 hours / Date

0.48 / 25th

0.50 / 25th

0.31 / 25-26th

0.34 / 25th

Most Snow in 24  hours / Date

7.8 / 25th

12.0 / 25th

6.4 / 25th

10.0 / 25th



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