SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
December 1, 2009
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: November 30, 2009   1:21 PM MST 
Date Issued for: December 1, 2009    7:00 AM MST
Date and Time Cancelled: December 1, 2009    5:00 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

2.6 calm calm   NA

02:00

2.0 8.1 NW   NA

03:00

5.6 10.4 NNW   NA

04:00

2.0 17.3 N   NA

05:00

34.6 17.3 NNW 35.7 NA

06:00

125.3 23.0 NNW   NA

07:00

109.8 18.4 NNW   NA

08:00

27.5 26.5 NNW 33.4 NA

09:00

102.0 21.9 NNW 31.1 NA

10:00

54.2 32.2 NNW 41.4 NA

11:00

34.9 32.2 NNW 47.2 NA

12:00

31.8 32.2 NNW 40.3 NA

13:00

20.1 26.5 NW 39.1 NA

14:00

17.2 25.3 NNW 33.4 NA

15:00

20.8 25.3 NNW 33.4 NA

16:00

36.4 21.9 NNW 31.1 NA

17:00

22.4 21.9 NNW 32.2 NA

18:00

8.6 21.9 NNW   NA

19:00

8.0 16.1 NNW   NA

20:00

6.8 21.9 NNW   NA

21:00

5.6 17.3 NW   NA

22:00

2.6 11.5 NW   NA

23:00

0.9 12.7 NNW   NA

24:00

4.7 16.1 NNW   NA

Averages

28.6 20.8      

PM10 24 hour Concentration = 28.6 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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