SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
May 4, 2010
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: May 4, 2010   4:13 AM MDT 
Date Issued for: May 4, 2010    Early Morning
Date and Time Cancelled: May 4, 2010    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

23.4 calm calm   NA

02:00

14.3 25.3 W 36.8 NA

03:00

37.5 18.4 W 31.1 NA

04:00

109.8 39.1 NNW 50.6 NA

05:00

34.1 35.7 NNW 52.9 NA

06:00

15.4 34.5 NNW 43.7 NA

07:00

10.6 21.9 NW 31.1 NA

08:00

5.7 18.4 WNW   0.0

09:00

7.4 19.6 W   NA

10:00

13.9 29.9 WNW 41.4 NA

11:00

10.3 25.3 W 36.8 NA

12:00

17.3 23.0 W   NA

13:00

7.9 27.6 W 39.1 NA

14:00

12.5 24.2 W 39.1 NA

15:00

14.6 32.2 WNW 39.1 NA

16:00

41.2 27.6 W 39.1 NA

17:00

26.4 25.3 WNW 35.7 NA

18:00

4.5 27.6 WNW 39.1 NA

19:00

10.9 28.8 WNW 39.1 NA

20:00

4.4 11.5 WNW   NA

21:00

10.1 21.9 WNW 31.1 NA

22:00

9.0 11.5 N   NA

23:00

9.8 11.5 NW   NA

24:00

3.9 16.1 WNW   NA

Averages

19.0 24.2      

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

PM10 24 hour Standard = 150 ug/m3

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