SOUTH DAKOTA Department of
Environment & Natural Resources

Protecting South Dakota's Tomorrow...Today!
Joe Foss Building
523 E Capitol
Pierre, SD 57501
Field Offices
Contact Us
SubMenu

Air Quality

Air Quality Alert - High Winds
July 31, 2009
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: July 31, 2009   1:09 PM MST 
Date Issued for: July 31 2009 through aftertoon 
Date and Time Cancelled: July 31, 2009  5:45 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

18.3 0.0 Calm   NA

02:00

10.3 0.0 Calm   NA

03:00

15.5 0.0 calm   NA

04:00

15.8 0.0 Calm   NA

05:00

9.3 0.0 Calm   NA

06:00

9.9 0.0 Calm   NA

07:00

15.2 3.5 ESE   NA

08:00

9.3 3.5 SE   NA

09:00

9.2 4.6 Var   NA

10:00

77.5 25.3 NNW 32.2 NA

11:00

455.3 36.8 NNW 52.9 NA

12:00

379.5 31.1 NNW 44.9 NA

13:00

102.8 29.9 NNW 39.1 NA

14:00

93.5 31.1 NW 40.3 NA

15:00

99.7 33.4 NNW 39.1 NA

16:00

48.2 26.5 NW 36.8 NA

17:00

SV 26.5 NNW 35.7 NA

18:00

43.3 24.3 NNW 33.4 NA

19:00

23.5 16.1 NNW   NA

20:00

25.1 11.5 NW   NA

21:00

12.8 10.4 NNW   NA

22:00

10.9 9.2 NW   NA

23:00

11.9 8.1 NW   NA

24:00

17.7 9.2 NNW   NA

Averages

65.8 14.4      

PM10 24 hour Concentration = 65.8 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

4oiGIFNEIEJJVCBEZXRlY3Rpb24=