SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
September 11, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: September 10, 2012   4:00 AM MDT 
Date Issued for: September 11, 2012   Midnight MDT
Date and Time Cancelled: September 11, 2012   Noon MDT
PM Concentrations location: Credit Union
Weather Observations:  

Time

PM10
Concentration

Wind Speed

Direction

Peak Wind

Precipitation

(military)

(Credit Union -ug/m3)

(mph)

 

(mph >30)

(inches)

01:00

5.5 8.1 SW   NA

02:00

12.1 8.1 SW   NA

03:00

13.9 5.8 VAR   NA

04:00

36.7 8.1 W   NA

05:00

68.4 10.4 N   NA

06:00

81.6 24.2 NNW 31.1 NA

07:00

129.5 27.6 NNW 35.7 NA

08:00

172.8 28.8 NNW 43.7 NA

09:00

162.5 29.9 NNW 39.1 NA

10:00

169.6 26.5 NNW 39.1 NA

11:00

228.4 23.0 NNW   NA

12:00

210.6 20.7 NNW 31.1 NA

13:00

213.5 20.7 N   NA

14:00

123.5 18.4 N   NA

15:00

114.7 17.3 N   NA

16:00

49.9 13.8 NNE   NA

17:00

43.2 11.5 NNE   NA

18:00

34.3 12.7 NNE   NA

19:00

50.6 8.1 NNE   NA

20:00

160.8 6.9 NNE   NA

21:00

150.8 9.2 NE   NA

22:00

133.7 13.8 NNE   NA

23:00

46.5 8.1 N   NA

24:00

47.1 5.8 NNW   NA

Averages

102.5 16.5      

PM10 24 hour Concentration = 102.5 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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