SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
September 20, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: September 20, 2012   3:26 AM MDT 
Date Issued for: September 20, 2012   2:00 PM MDT
Date and Time Cancelled: September 20, 2012   7:00 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

36.2 8.1 N   NA

02:00

21.4 5.8 NW   NA

03:00

12.9 3.5 WNW   NA

04:00

18.6 6.9 NW   NA

05:00

18.2 5.8 WNW   NA

06:00

25.4 4.6 NW   NA

07:00

23.0 4.6 WNW   NA

08:00

36.2 3.5 NW   NA

09:00

42.8 4.6 W   NA

10:00

41.9 3.5 VAR   NA

11:00

15.3 6.9 NE   NA

12:00

17.8 5.8 S   NA

13:00

41.6 4.6 VAR   NA

14:00

187.6 6.9 NNW   NA

15:00

181.3 11.5 N   NA

16:00

137.8 19.6 N   NA

17:00

70.6 21.9 NNW 32.2 NA

18:00

43.6 26.5 N 33.4 NA

19:00

44.3 18.4 N   NA

20:00

34.3 16.1 N   NA

21:00

37.0 10.4 N   NA

22:00

29.2 11.5 NNW   NA

23:00

21.8 9.2 NNW   NA

24:00

22.2 11.5 N   NA

Averages

48.4 9.5      

PM10 24 hour Concentration = 48.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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