SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
April 2, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: April 1, 2012   5:40 PM MDT 
Date Issued for: April 1, 2012   6:00 PM MDT
Date and Time Cancelled: April 2, 2012   6:00 PM MDT
PM Concentrations location: Credit Union
Weather Observations:  

Time

PM10
Concentration

Wind Speed

5.8Direction34.1

Peak Wind

Precipitation

(military)

(Credit Union -ug/m3)

(mph)

 

(mph >30)

(inches)

01:00

63.0 35.7 NNW 46.0 NA

02:00

39.9 35.7 N 46.0 NA

03:00

43.4 36.8 NNW 43.7 NA

04:00

37.8 34.5 NNW 46.0 NA

05:00

40.1 38.0 NNW 49.5 NA

06:00

25.2 34.5 NNW 49.5 NA

07:00

73.1 42.6 NNW 52.9 NA

08:00

125.1 43.7 NNW 55.2 NA

09:00

107.1 44.9 NNW 57.5 NA

10:00

132.7 43.7 NNW 54.1 NA

11:00

139.6 44.9 N 57.5 NA

12:00

155.2 46.0 NNW 57.5 NA

13:00

101.8 48.3 NNW 58.7 NA

14:00

67.3 43.7 NNW 59.8 NA

15:00

92.6 38.0 NNW 51.8 NA

16:00

77.8 34.5 NNW 43.7 NA

17:00

100.7 33.4 NNW 41.4 NA

18:00

63.9 21.9 N 32.2 NA

19:00

78.0 18.4 N   NA

20:00

65.2 17.3 NNE   NA

21:00

50.1 8.1 ENE   NA

22:00

38.6 5.8 ENE   NA

23:00

13.8 4.6 NNE   NA

24:00

7.6 5.8 NNW   NA

Averages

72.5 34.1      

PM10 24 hour Concentration = 72.5 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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