SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
May 6, 2011
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: May 6, 2011   7:45 AM MDT 
Date Issued for: May 6, 2011   7:45 AM MDT
Date and Time Cancelled: May 6, 2011   5:00 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

4.1 8.1 SE   NA

02:00

11.8 5.8 S   NA

03:00

17.6 calm calm   NA

04:00

11.4 calm calm   NA

05:00

-1.3 9.2 WNW   NA

06:00

19.7 15.0 WNW   NA

07:00

178.4 11.5 NW   NA

08:00

214.5 39.1 NNW 47.2 NA

09:00

117.5 31.1 NNW 36.8 NA

10:00

88.6 31.1 NNW 39.1 NA

11:00

60.0 29.9 NNW 38.0 NA

12:00

70.0 27.6 N 35.7 NA

13:00

84.5 25.3 N 36.8 NA

14:00

76.7 25.3 N 33.4 NA

15:00

64.6 26.5 N 31.1 NA

16:00

38.0 20.7 N   NA

17:00

28.9 19.6 N   NA

18:00

26.9 17.3 N   NA

19:00

13.8 15.0 N   NA

20:00

24.6 11.5 N   NA

21:00

10.8 5.8 N   NA

22:00

17.1 2.6 W   NA

23:00

10.3 3.5 W   NA

24:00

9.6 calm calm   NA

Averages

49.9 18.2      

PM10 24 hour Concentration = 49.9 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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