SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
September 12, 2011
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: September 12, 2011   3:41 AM MDT 
Date Issued for: September 12, 2011   8:00 AM MDT
Date and Time Cancelled: September 12, 2011   3:00 PM 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

13.3 10.4 WNW   NA

02:00

62.9 10.4 NW   NA

03:00

18.1 8.1 WNW   NA

04:00

13.7 8.1 NW   NA

05:00

19.0 11.5 NW   NA

06:00

15.6 11.5 WNW   NA

07:00

16.3 9.2 WNW   NA

08:00

138.2 21.9 N 31.1 NA

09:00

268.7 29.9 NNW 39.1 NA

10:00

520.1 33.4 NNW 46.0 NA

11:00

458.2 28.8 N 41.1 NA

12:00

228.0 23.0 N 35.7 NA

13:00

172.7 18.4 N   NA

14:00

145.5 17.3 N   NA

15:00

120.1 16.1 NNW   NA

16:00

100.2 17.3 N   NA

17:00

93.8 10.4 NNE   NA

18:00

103.7 9.2 NNE   NA

19:00

85.0 9.2 N   NA

20:00

82.5 5.8 NE   NA

21:00

36.6 3.5 NE   NA

22:00

36.7 5.8 ENE   NA

23:00

35.0 calm calm   NA

24:00

33.3 4.6 E   NA

Averages

117.4 14.2      

PM10 24 hour Concentration = 117.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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