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SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
September 30, 2020
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: September 30, 2020  2:02 AM MDT 
Date Issued for:

September 30, 2020  9:00 AM MDT

Date and Time Cancelled: September 30, 2020  7:00 PM MDT
PM Concentrations location: Credit Union
Weather Observations: Rapid City Regional Airport

Time

PM10
Concentration

Wind Speed

Direction

Peak Wind

Precipitation

(military)

(Credit Union -ug/m3)

(mph)

 

(mph >30)

(inches)

01:00

84.3 13 NNW   NA

02:00

21.6 17 NNW   NA

03:00

20.1 14 NNW   NA

04:00

26.3 21 NNW 33 NA

05:00

68.4 16 N   NA

06:00

100.1 21 N 36 NA

07:00

137.2 18

N

  NA

08:00

58.8 22 NNW   NA

09:00

68.7 26 NNW 33 NA

10:00

92.7 24 NNW 37 NA

11:00

125.8 25 NW 36 NA

12:00

63 31 NW 43 NA

13:00

93.2 22 NNW

36

NA

14:00

65 26 NW 40 NA

15:00

64.2 26 NNW 41 NA

16:00

103.1 26 NNW 41 NA

17:00

75.5 26 NNW 41 NA

18:00

37 26 NNW 41 NA

19:00

18.9 26 NNW 41 NA

20:00

12.7 26 NNW 41 NA

21:00

12.7 12 NW 40 NA

22:00

12.7 17 WNW   NA

23:00

13.4 0     NA

24:00

10.1 21     NA

Averages

57.7 21 18    

 

PM10 24 hour Concentration = 57.7 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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