SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
January 27, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: January 27, 2012   4:56 AM MST 
Date Issued for: January 27, 2012   4:56 AM MST
Date and Time Cancelled: January 27, 2012   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

22.9 16.1 NNW   NA

02:00

11.5 29.9 NNW 40.3 NA

03:00

6.1 32.2 NW 42.6 NA

04:00

7.8 28.8 NW 43.7 NA

05:00

9.9 28.8 NNW 44.9 NA

06:00

11.4 29.9 NNW 46.0 NA

07:00

19.1 31.1 NNW 43.7 NA

08:00

10.6 31.1 NNW 44.9 NA

09:00

22.4 32.2 NNW 42.6 NA

10:00

18.7 24.2 NNW 38.0 0.00 in

11:00

45.9 23.0 NNW 33.4 0.00 in

12:00

44.8 25.3 NNW 42.6 0.00 in

13:00

74.5 24.2 NNW 35.7 0.00 in

14:00

46.5 23.0 NNW   NA

15:00

52.2 26.5 NNW 34.5 0.00 in

16:00

2.3 17.3 NNW   NA

17:00

12.3 23.0 NNW 31.1 NA

18:00

12.8 17.3 WNW   NA

19:00

13.7 15.0 NW   NA

20:00

6.6 11.5 WNW   NA

21:00

4.4 12.7 W   NA

22:00

6.5 6.9 WNW   NA

23:00

7.6 3.5 NNW   NA

24:00

0.6 8.1 W   NA

Averages

19.6 23.2      

PM10 24 hour Concentration = 19.6 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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