Cool and Wet May

 May 2011 continued the string of months with below normal temperatures and above normal precipitation.  The average temperatures for May were from 2 to nearly 5.5 degrees below normal across the region.  The train of strong upper level low pressure systems kept rolling over the region bringing 3 to over 4 inches of rainfall for May.  The average highs were well below normal ranging from 4 to 8 degrees below normal.  With the cooler temperatures, severe weather was also kept at a minimum for the month. Flooding also continued throughout the month mainly along the James River and on Lake Poinsett.

 MAY 2011

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

83 / 10th

87 / 30th

87 / 31st

85 / 30th

Coldest Temperature / Date

27 / 3rd

27 / 1st

27 / 1st

25 / 3rd

Average High / Departure from Normal

65.2 / -5.1

64.3 / -5.9

64.1 / -8.2

63.8 / -4.1

Average Low / Departure from Normal

44.2 / -1.4

43.6 / -2.5

44.3 / -2.8

43.6 / 0.0

Monthly Average / Departure from Normal

54.7 / -3.2

53.9 / -4.3

54.2 / -5.5

53.7 / -2.1

Precipitation Data

       

Monthly Precipitation / Departure from Normal

2.93 / +0.24

3.40 / +0.64

3.36 / +0.82

4.13 / +1.52

Most Precipitation in 24 hours / Date

0.88 / 11-12th

0.81 / 20-21st

0.88 / 28th

1.19 / 30th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

88 / 8th

86 / 8th

85 / 9th

82 / 9th 

Coldest Temperature / Date

27 / 2nd,  3rd

21 / 3rd

20 / 2nd

22 / 2nd

Average High / Departure from Normal

64.9 / -6.5

67.4 / -6.6

64.5 / -5.1

63.7 / -5.9

Average Low / Departure from Normal

43.7 / -2.6

43.2 / -2.9

42.2 / -3.4

41.4 / -3.1

Monthly Average / Departure from Normal

54.3 / -4.6

55.3 / -4.8

53.4 / -4.2

52.5 / -4.6

Precipitation Data

       

Monthly Precipitation / Departure from Normal

3.24 / +0.10

3.77 / +0.75

2.50 / -0.13

3.27 / +0.37

Most Precipitation in 24 hours / Date

1.09 / 11-12th

1.10 / 21st

1.10 / 20th

0.89 / 20th



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