2010...Much Wetter than Normal

 The weather for 2010 across central and northeast South Dakota as well as west central Minnesota was much wetter than normal, especially across northeast South Dakota and west central Minnesota. The yearly average temperatures for 2010 were generally below normal and within a degree of normal.  Watertown was the only location with a yearly average temperature above normal and was due mainly to the warm minimum average temperatures.  Interestingly enough, both Aberdeen and Kennebec finished the year with an average temperature right at normal.  Bitter cold air in early January brought some record lows for the region with lows in the mid 20s to the mid 30s below zero. The heat was finally turned up in central and north central South Dakota in the Summer of 2010 where all locations warmed up to well over 100 degrees.  After two consecutive summers of not reaching 100 degrees, Pierre reached and surpassed 100 degrees several times this past summer.

The yearly precipitation was above normal for most locations across central and northeast South Dakota as well as west central Minnesota. The snowmelt in the spring and the summer thunderstorms led to flooding across parts of central and much of northeast South Dakota and west central Minnesota.  For 2010, most locations were from 3 to 7 inches above normal.  North central South Dakota actually went into drought for much of the summer of 2010. Mobridge’s yearly precipitation was at 16 inches or sixty-five hundredths below normal whereas, Wheaton and Watertown received almost 29 inches of precipitation for the year.

The biggest weather events of the year were the devastating Bowdle EF4 tornado in late May, the United States record 8-inch diameter and almost 2 pound hailstone that fell in Vivian, South Dakota in July.  The other big event for 2010 was the record surface low pressure area that moved across Minnesota in late October which brought very high winds gusting to over 70 mph to the region for two days causing damage across parts of the region.

 

CLIMATE SUMMARY 2010

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature/Date

96 / 7/17, 8/22

96 / July 17th

98 / July 18th

94 / Aug 8th

Coldest Temperature/Date

-31 / Jan 9th

-35 / Jan 2nd

-30 / Jan 2nd

-31 / Jan 2nd

Average Yearly High/Departure from Normal

54.4 / -0.7

53.5 / -0.9

52.5 / -2.5

52.9 / 0.0

Average Yearly Low/Departure from Normal

33.1 / +0.7

33.5 / +0.2

33.7 / +1.0

33.4 / +2.3

Yearly Average/Departure from Normal

43.8 / 0.0

43.5 / -0.4

43.1 / -0.8

43.2 / +1.2

Precipitation/Wind Data

       

Yearly Precipitation / Departure from Normal

27.22 / +7.00

26.13 / +4.05

28.93 / +6.39

28.82 / +6.88

Highest Wind Gust MPH / Date

62 / Oct 26th

64 / Oct 26th

N/A

68 / Jun 23rd

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature/Date

108 / Aug 27th

105/ Jul 17th

106 /Aug 27th

104/Aug 22nd

Coldest Temperature/Date

-23 / Jan 8th

-24 / Jan 8th

-30 / Jan 8th

-24 / Jan 8th

Average Yearly High/Departure from Normal

56.9 / -2.5

59.5 / -1.7

54.5 / -2.2

54.6 / -1.6

Average Yearly Low/Departure from Normal

35.1 /  -0.4

35.4 /  +1.8

33.1 / +0.1

32.9 / -0.4

Yearly Average/Departure from Normal

46.0 / -1.5

47.4 / 0.0

43.8 / -1.3

43.8 / -1.0

Precipitation/Wind Data

       

Yearly Precipitation / Departure from Normal

23.15 / +3.27

24.41 / +5.70

16.00 / -0.65

19.71 / +1.11

Highest Wind Gust MPH / Date

72 / Oct 8th

N/A

64 / Oct 26th

N/A

 



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