SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
April 1, 2015
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: April 1, 2015  2:38 AM MDT 
Date Issued for:

April 1, 2015  5:00 AM MDT

Date and Time Cancelled: April 1, 2015  7:00 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

5.7 6.9 SSE   NA

02:00

15.8 3.5 W   NA

03:00

9.8 6.9 S   NA

04:00

9.5 6.9 WNW   NA

05:00

37.2 42.6 NNW 52.9 NA

06:00

69.6 29.9 NNW 40.3 NA

07:00

32.8 34.5 NNW 41.4 NA

08:00

24.4 32.2 NNW 41.4 NA

09:00

21.8 33.4 NNW 41.4 NA

10:00

21.9 31.1 NNW 43.7 NA

11:00

40.3 34.5 NNW 48.3 NA

12:00

55.3 33.4 NNW 51.8 NA

13:00

11.7 36.8 NNW 48.3 NA

14:00

150.0 41.4 NNW 51.8 NA

15:00

68.6 36.8 NNW 48.3 NA

16:00

35.2 24.2 NNW 36.8 NA

17:00

17.5 29.9 NNW 36.8 NA

18:00

6.4 15.0 NNW   NA

19:00

-1.0 9.2 NNW   NA

20:00

6.1 8.1 NW   NA

21:00

16.9 4.6 W   NA

22:00

15.1 8.1 W   NA

23:00

13.2 9.2 W   NA

24:00

10.3 5.8 W   NA

Averages

33.1 22.5      

 

PM10 24 hour Concentration = 33.1 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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