SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
February 21, 2014
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: February 21, 2014  3:18 AM MST 
Date Issued for:

February 21, 2014  12:00 PM MST

Date and Time Cancelled: February 21, 2014  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

18.2 calm calm   NA

02:00

15.1 3.5 W   NA

03:00

28.5 calm calm   NA

04:00

9.3 calm calm   NA

05:00

1.0 3.5 NW   NA

06:00

1.4 10.0 NW   NA

07:00

4.4 10.4 WNW   NA

08:00

3.9 12.7 NW   NA

09:00

8.3 24.2 NW 32.2 NA

10:00

11.7 26.5 NW 31.1 NA

11:00

12.9 27.6 NNW 36.8 NA

12:00

25.7 20.7 NW   0.0

13:00

49.2 18.4 NNW   NA

14:00

10.0 18.4 WNW   NA

15:00

8.7 15.0 NW   NA

16:00

11.1 15.0 N   NA

17:00

7.6 8.1 N   NA

18:00

8.9 9.2 N   NA

19:00

19.1 19.6 NNW   NA

20:00

78.2 25.3 NNW 36.8 0.0

21:00

7.2 25.3 NNW 31.1 NA

22:00

4.6 15.0 NNW   NA

23:00

29.3 15.0 NNW   NA

24:00

20.0 13.8 NNW   NA

Averages

16.4 16.1      

 

PM10 24 hour Concentration = 16.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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