SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
February 20, 2014
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: February 20, 2014  4:00 AM MST 
Date Issued for:

February 20, 2014  7:00 AM MST

Date and Time Cancelled: February 20, 2014  7:00 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

0.2 10.4 WNW   NA

02:00

2.1 9.2 WNW   NA

03:00

3.3 6.9 W   NA

04:00

1.0 11.5 WNW   NA

05:00

1.2 13.8 WNW   NA

06:00

3.4 20.7 NW   NA

07:00

14.0 23.0 NW 31.1 NA

08:00

22.6 24.2 NW 38.0 0.00

09:00

35.0 40.3 NNW 48.3 0.00

10:00

69.8 42.6 NNW 51.8 NA

11:00

208.9 44.9 NNW 58.7 NA

12:00

169.4 47.2 NNW 55.2 NA

13:00

82.6 36.8 NNW 52.9 NA

14:00

41.0 32.2 NNW 47.2 NA

15:00

64.7 29.9 NNW 39.1 NA

16:00

24.0 29.9 NW 39.1 NA

17:00

10.2 15.0 NNW   NA

18:00

12.3 5.8 NNW   NA

19:00

10.7 10.4 NNW   NA

20:00

28.5 4.6 WNW   NA

21:00

20.9 calm calm   NA

22:00

16.4 5.8 WSW   NA

23:00

19.5 3.5 WNW   NA

24:00

9.8 3.5 W   NA

Averages

37.5 20.5      

 

PM10 24 hour Concentration = 37.5 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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