SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
December 22, 2014
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: December 21, 2014  4:02 PM MST 
Date Issued for:

December 22, 2014  6:00 AM MST

Date and Time Cancelled: December 22, 2014  8:00 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

7.5 31.1 NW 47.2 NA

02:00

2.8 24.2 NW 31.1 NA

03:00

3.7 28.8 NW 36.8 NA

04:00

2.4 20.7 NW 31.1 NA

05:00

1.3 26.5 NW 42.6 NA

06:00

1.9 35.7 NW 44.9 NA

07:00

5.6 24.2 NW 30.1 NA

08:00

7.5 24.2 NW 38.0 NA

09:00

13.3 23 NW 31.1 NA

10:00

33.4 28.8 NW 47.2 NA

11:00

73.4 36.8 NNW 50.6 NA

12:00

215.4 41.4 NNW 50.6 NA

13:00

201.3 31.1 NNW 41.4 NA

14:00

269.0 46 NNW 55.2 NA

15:00

173.8 42.6 NNW 54.1 NA

16:00

102.4 46 NNW 57.5 0.00

17:00

78.2 38 NNW 55.2 0.00

18:00

52.9 43.7 NNW 52.9 0.00

19:00

43.8 27.6 NNW 40.3 0.00

20:00

29.6 32.2 NNW 43.7 0.03

21:00

33.7 35.7 NNW 50.6 0.00

22:00

54.2 29.9 N 40.3 0.02

23:00

53.2 29.9 N 36.8 0.02

24:00

42.4 32.2 N 41.4 0.00

Averages

62.6 32.5      

 

PM10 24 hour Concentration = 62.6 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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