SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
February 17, 2011
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: February 17, 2011   5:33 AM MST 
Date Issued for: February 17, 2011   5:33 AM MST
Date and Time Cancelled: February 17, 2011   6:00 PM MST
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

20.5 6.9 SSW   NA

02:00

18.2 5.8 SW   NA

03:00

5.1 9.2 S   NA

04:00

21.0 9.2 S   NA

05:00

43.2 4.6 VAR   NA

06:00

29.9 16.1 NNW   NA

07:00

19.3 16.1 N   NA

08:00

8.3 5.8 NE   NA

09:00

2.5 6.9 VAR   NA

10:00

14.6 24.2 W 33.4 NA

11:00

16.0 28.8 WNW 41.4 NA

12:00

26.5 28.8 WNW 36.8 NA

13:00

30.4 32.2 W 38.0 NA

14:00

16.8 24.2 W 34.5 NA

15:00

14.6 23.0 NNW   NA

16:00

13.6 23.0 NW 31.1 NA

17:00

10.1 19.6 NNW   NA

18:00

19.2 5.8 NNE   NA

19:00

10.1 5.8 NE   NA

20:00

15.7 6.9 ESE   NA

21:00

24.2 calm calm   NA

22:00

26.2 3.5 W   NA

23:00

19.7 11.5 N   NA

24:00

58.0 5.8 N   NA

Averages

20.2 14.1      

PM10 24 hour Concentration = 20.2 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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