SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
September 19, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: September 18, 2012   8:40 PM MDT 
Date Issued for: September 19, 2012   3:00 AM MDT
Date and Time Cancelled: September 19, 2012   2:00 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

20.8 4.6 WNW   NA

02:00

8.5 3.5 N   NA

03:00

11.7 5.8 NW   NA

04:00

11.3 3.5 NW   NA

05:00

137.3 11.5 WNW   NA

06:00

118.6 12.7 NNW   NA

07:00

92.9 24.2 NNW 33.4 NA

08:00

220.9 21.9 NNW   NA

09:00

249.6 26.5 N 39.1 NA

10:00

242.5 27.6 N 39.1 NA

11:00

191.6 33.4 NNW 44.9 NA

12:00

132.8 27.6 NNW 41.4 NA

13:00

135.5 25.3 NNW 32.2 NA

14:00

141.1 24.2 NNW 33.4 NA

15:00

146.4 23.0 NNW 31.1 NA

16:00

79.0 26.5 N 34.5 NA

17:00

64.1 18.4 NNW 32.2 NA

18:00

44.4 19.6 N   NA

19:00

41.2 20.7 N   NA

20:00

57.4 12.7 N   NA

21:00

27.8 11.5 N   NA

22:00

32.2   N   NA

23:00

24.5 8.1 NNW   NA

24:00

17.6 8.1 N   NA

Averages

93.7 18.7      

PM10 24 hour Concentration = 93.7 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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