Cooler and Wetter than Normal June

The trend of cooler and wetter than normal conditions continued across the area for June as the relentless parade of upper level low pressure systems moved across the region from the Pacific Northwest.  June 2011 across central and northeast South Dakota along with west central Minnesota was generally wetter and cooler than normal.  June average temperatures were from a half degree to nearly 4 degrees below normal. There were only a couple big warm-ups during the month with the highest temperatures reaching the 90s with no location reaching the 100 degree mark.

The rainfall for June was generally above to much above normal, especially across central and north central South Dakota. Watertown was the only location with slightly below normal rainfall.  June rainfall ranged from 4 to 8 inches across the region. Pierre received the most rainfall for the month with 8.31 inches, almost 5 inches above normal. The 8.31 inches of rainfall at Pierre broke the all-time June rainfall record along with the all-time precipitation record for any month. The big rainfall event for the month was from June 19th through June 21st when a winter or early spring type strong upper level low pressure system brought widespread heavy rainfall to the region.  The heavy rainfall created more flooding along with worsening the ongoing flooding, especially along the Missouri River.  Rainfall amounts from this storm ranged anywhere from 1 to almost 7 inches across the area.  The seven inches of rainfall created flash flooding along with a two deaths near Fort Thompson in central South Dakota.

 JUNE 2011

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

98 / 6th

97 / 30th

94 / 7th

94 /6th, 30th

Coldest Temperature / Date

42 / 11th

43 / 9th

47 / 9th

42 / 11th

Average High / Departure from Normal

77.2 / -1.5

75.8 / -2.6

74.2 / -6.0

74.8 / -2.3

Average Low / Departure from Normal

55.7 / +0.9

56.2 / +1.2

56.2 / -0.5

54.7 / +1.4

Monthly Average / Departure from Normal

66.4 / -0.4

66.0 / -0.7

65.2 / -3.3

64.8 / -0.4

Precipitation Data

       

Monthly Precipitation / Departure from Normal

4.69 / +1.20

3.66 / +0.36

4.12 / +0.35

3.80 / -0.21

Most Precipitation in 24 hours / Date/s

1.93 /20-21 

1.65 / 21-22

0.92 / 22nd

1.77 / 20-21

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

94 / 6th

97 / 6th

90 / 6th

92 / 29th

Coldest Temperature / Date

38 / 1st,11th

38 / 1st

37 / 1st

39 / 11th

Average High / Departure from Normal

77.6 / -3.8

80.5 / -3.3

74.3 / -4.3

78.0 /  -0.6

Average Low / Departure from Normal

53.1 / -2.8

53.9 / -2.1

52.2 / -3.0

53.7 / -0.1

Monthly Average / Departure from Normal

65.3 / -3.4

67.2 / -2.7

63.2 / -3.7

65.9 / -0.3

Precipitation Data

       

Monthly Precipitation / Departure from Normal

8.31 / +4.82

5.05 / +2.07

5.07 / +2.13

6.19 / +3.02

Most Precipitation in 24 hours / Date/s

3.01 / 20-21

1.75 / 21st 

1.95 / 20-21

2.03 / 20th



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