SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
April 6, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: April 6, 2012   4:42 AM MDT 
Date Issued for: April 6, 2012   4:42 AM MDT
Date and Time Cancelled: April 6, 2012   9:00 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

4.2 13.8 SE   NA

02:00

14.5 15.0 SE   NA

03:00

11.7 12.7 SE   NA

04:00

11.1 10.4 SSE   NA

05:00

13.4 12.7 SE   NA

06:00

12.4 13.8 SSE   0.00 in

07:00

9.7 19.6 SSE   NA

08:00

13.5 17.3 SSE   NA

09:00

11.6 26.5 S 33.4 NA

10:00

11.7 26.5 S 36.8 NA

11:00

17.8 23.0 S 35.7 NA

12:00

10.9 24.2 S 36.8 NA

13:00

18.0 21.9 SSE   NA

14:00

12.9 23.0 S 34.5 NA

15:00

29.8 19.6 SSE 33.4 NA

16:00

61.9 26.5 SSE 34.5 NA

17:00

86.6 28.8 W 36.8 0.00 in

18:00

173.2 15.0 N   0.41 in

19:00

193.5 24.2 N   NA

20:00

190.5 23.0 N   NA

21:00

91.7 26.5 N 35.7 NA

22:00

51.5 27.6 N 33.4 NA

23:00

34.6 21.9 N   NA

24:00

3.7 11.5 N   NA

Averages

45.4 20.5      

PM10 24 hour Concentration = 45.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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