Rainfall reports from the Sioux Falls area on August 27, 2015

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Ending Friday morning, August 28, 2015

On the evening of August 27, a large thunderstorm complex moved across the Sioux Falls area causing significant flooding on the south side of Sioux Falls. As is typical with thunderstorms, rainfall across the city varied significantly depending upon where one was located. On the southwest side of Sioux Falls 6 to 8 inches of rain was reported. On the southeast side of Sioux Falls, rainfall was generally 3 to 5 inches. And as one move north of the city rainfall decreased rapidly with 2.61 inches at the aiport and only 0.62 inches of rain 4 miles north of Renne. The storm also weakened as it moved east of Sioux Falls and as a result around 2 inches of rain fell around Brandon and Garretson.

Below is a map showing how rainfall varied across the city followed by a table showing the approximate location of each report. Lastly, we have a graph which shows how quickly the rainfall fell during the evening for August 27 on the west side of Sioux Falls. In a ten minute period, 0.91 inches of rain fell and 5.38 inches of rain accumulated in 2 hours! It both the amount of rain and the intensity of the rain that caused the significant flooding over the south side of Sioux Falls.

Location

24-h Rainfall (in.)

Siou xFalls 3.9 SW

7.52

Sioux Falls 3.4 WSW

7.26

Tea 4 NNE

6.93

Sioux Falls 3.7 WSW

6.83

Sioux Falls 4.2 WSW

6.70

Sioux Falls 1.9 SSW

6.34

Sioux Falls 4 W

6.31

Sioux Falls 4.5 S

6.16

Sioux Falls 4.1 SSE

5.30

Sioux Falls 3 W

4.81

Sioux Falls 3 SSW

4.71

Sioux Falls 5.2 SE

4.71

Sioux Falls 4.5 SSW

4.20

Sioux Falls 4 S

4.15

Sioux Falls 3.4 ESE

3.84

Sioux Falls 5.0 SE

3.82

Harrisburg 2.5 NW

3.81

Sioux Falls 3.6 ESE

3.45

Sioux Falls Airport

2.61

Sioux Falls 5.2 E

2.55

Brandon 4.0 SE

2.38

Brandon 1 NNE

2.30

Hartford 6.4 S

2.27

Garretson 4.2 SSE

1.90

Lennox 3.3 NE

1.73

Garretson 6.9 W

0.64

Renner 4.1 NW

0.62

Hartford 2 ENE

0.34