SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
March 28, 2015
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: March 28, 2015  3:04 AM MDT 
Date Issued for:

March 28, 2015  6:00 PM MDT

Date and Time Cancelled: March 29, 2015  5:00 AM 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

105.7 3.5 W   NA

02:00

12.2 calm calm   NA

03:00

5.6 4.6 W   NA

04:00

4.9 calm calm   NA

05:00

4.7 calm calm   NA

06:00

7.2 3.5 ESE   NA

07:00

9.4 3.5 ESE   NA

08:00

13.8 5.8 SE   NA

09:00

20.0 9.2 SE   NA

10:00

28.6 12.7 SSE   NA

11:00

16.2 17.3 S   NA

12:00

24.0 20.7 SSE   NA

13:00

27.7 18.4 SSE   NA

14:00

7.4 23.0 SW 32.2 NA

15:00

12.9 17.3 W   NA

16:00

14.7 18.4 W   NA

17:00

17.8 24.2 W 31.1 NA

18:00

43.1 19.6 WNW 31.1 NA

19:00

626.5 48.3 NNW 64.4 NA

20:00

301.3 39.1 NNW 49.5 NA

21:00

39.0 34.5 NNW 44.9 NA

22:00

35.9 39.1 NNW 55.2 NA

23:00

53.5 26.5 NW 35.7 NA

24:00

38.7 33.4 NW 49.5 NA

Averages

61.3 20.1      

 

PM10 24 hour Concentration = 61.3 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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