National Weather Service United States Department of Commerce

Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >

The below normal temperature trend continued across central and northeast South as well as west central Minnesota for the month of August. Temperatures for the month averaged from 2.5 to around 5 degrees below normal. The highest temperatures for the month were in the 90s with lows in the upper 30s to the mid 40s. Sisseton cooled to a chilly 37 degrees on August 30th. Every location had above normal rainfall for August with Pierre and Sisseton nearing 2 inches above normal. On August 7th, Sisseton had nearly 3 inches of rainfall.

 

AUGUST

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature/Date

92 / 12th

90 / 12th

94 / 13th

90 / 12th

Coldest Temperature/Date

40 / 30th

37 / 30th

43/ 30-31st

40 / 30th

Average High/Departure from Normal

78.5 / -5.0

76.8 / -5.3

77.1 / -6.4

76.2 / -3.8

Average Low/Departure from Normal

53.2 / -4.2

54.5 / -3.7

55.0 / -4.1

54.7 / -1.3

Month Average/Departure from Normal

65.9 / -4.6

65.7 / -4.5

66.1 / -5.2

65.5 / -2.5

Precipitation Data

       

Monthly Precipitation / Departure from Normal

2.82 / +0.40

4.29 / +1.70

2.70 / +.17

3.43 / +0.58

Most Precipitation in 24 hours/Dates

1.14 / 15-16th

2.97 / 7th

.93 / 16th

1.21 / 18-19th

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature/Date

97 / 2nd, 12th

97 / 2nd

92 / 12th

98 / 12th

Coldest Temperature/Date

47 / 30th

45 / 1st, 30th

43 / 18th

44 / 1st

Average High/Departure from Normal

82.7 / -5.3

84.5 / -5.1

79.8 / -4.7

81.5 / -2.6

Average Low/Departure from Normal

56.5 / -3.6

55.9 / -4.0

53.9 / -5.4

54.0 / -3.7

Month Average/Departure from Normal

69.6 / -4.5

70.2 / -4.6

66.8 / -5.1

67.7 / -3.2

Precipitation Data

       

Monthly Precipitation / Departure from Normal

3.78 / +1.92

2.54 / +.52

2.38 / +0.51

2.59 / +.70

Most Precipitation in 24 hours/Dates

1.71 / 14-15th

.78 / 6th

0.62 / 8th

.99 / 8th