SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
October 23, 2011
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: October 23, 2011   5:53 AM MDT 
Date Issued for: October 23, 2011   10:00 AM MDT
Date and Time Cancelled: October 23, 2011   Late Afternoon
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

26.3 5.8 W   NA

02:00

35.0 4.6 W   NA

03:00

13.3 6.9 NW   NA

04:00

0.0 9.2 NW   NA

05:00

5.0 8.1 WNW   NA

06:00

8.4 10.4 NNW   NA

07:00

4.6 5.8 WNW   NA

08:00

-0.5 6.9 W   NA

09:00

9.1 9.2 W   NA

10:00

8.4 10.4 NW   NA

11:00

45.7 25.3 NW 32.2 NA

12:00

52.3 23.0 NW   0.00

13:00

9.3 23.0 WNW   0.00

14:00

4.9 15.0 NW   NA

15:00

2.9 15.0 N   NA

16:00

23.1 12.7 NNW   NA

17:00

8.3 9.2 NNW   NA

18:00

13.1 10.4 N   NA

19:00

19.6 5.8 WNW   NA

20:00

17.2 5.8 WNW   NA

21:00

7.4 8.1 NW   NA

22:00

15.0 5.8 NW   NA

23:00

21.2 6.9 NW   NA

24:00

17.9 6.9 NW   NA

Averages

15.3 10.7      

PM10 24 hour Concentration = 15.3 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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