SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
March 11, 2013
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: March 11, 2013  4:02 AM MDT 
Date Issued for:

March 11, 2013 4:02 AM MDT

Date and Time Cancelled: March 11, 2013  4:00 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

13.1 3.5     NA

02:00

28.3 5.8     NA

03:00

98.8 calm calm   NA

04:00

183.9 calm calm   NA

05:00

44.3 calm calm   NA

06:00

41.6 4.6 NW   NA

07:00

21.4 5.8 W   NA

08:00

30.3 5.8 NNW   NA

09:00

5.5 26.5 NNW 33.5 NA

10:00

132.2 18.4 NW   NA

11:00

124.9 31.1 NNW 40.3 NA

12:00

131.5 35.7 NW 46.0 NA

13:00

92.5 29.9 NNW 43.7 NA

14:00

91.0 32.2 NNW 40.3 NA

15:00

37.1 29.9 NNW 41.4 NA

16:00

33.3 28.8 NNW 39.1 NA

17:00

16.6 34.5 NNW 41.1 NA

18:00

24.1 29.9 NNW 38.0 NA

19:00

17.2 27.5 NNW 36.8 NA

20:00

6.3 21.9 NW   NA

21:00

5.4 17.3 NW   NA

22:00

4.7 11.5 NW   NA

23:00

13.8 23.0 NW   NA

24:00

12.6 24.2 NNW 35.7 NA

Averages

50.4 21.3      

PM10 24 hour Concentration = 50.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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