SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
March 26, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: March 26, 2012   11:15 AM MDT 
Date Issued for: March 26, 2012   4:00 PM MDT
Date and Time Cancelled: March 27, 2012   6:00 AM 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

18.2 5.8 SE   NA

02:00

18.0 6.9 SSE   NA

03:00

12.0 5.8 S   NA

04:00

13.3 8.1 SSE   NA

05:00

16.4 6.9 SSE   NA

06:00

19.9 9.2 SE   NA

07:00

22.6 12.7 SE   NA

08:00

21.2 9.2 SE   NA

09:00

11.6 9.2 SE   NA

10:00

9.3 10.4 SSE   NA

11:00

18.2 13.8 SE   NA

12:00

6.0 11.5 SE   NA

13:00

22.1 11.5 SE   NA

14:00

14.3 16.1 S   NA

15:00

16.1 16.1 SSE   NA

16:00

15.5 11.5 SE   NA

17:00

22.6 11.5 S   NA

18:00

59.3 10.4 SE   NA

19:00

37.3 3.5 VAR   0.00 IN

20:00

14.0 35.7 W 52.9 0.00 IN

21:00

15.5 32.2 WNW 40.3 NA

22:00

20.3 15.0 WSW   NA

23:00

19.2 25.3 WSW 41.4 NA

24:00

12.1 13.8 SW   NA

Averages

19.0 12.4      

PM10 24 hour Concentration = 19.0 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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