SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
March 29, 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

15.5 43.7 NW 46.0 NA

02:00

71.0 49.5 NW 54.1 NA

03:00

15.3 56.4 NW 63.3 NA

04:00

176.4 43.7 NNW 74.8 NA

05:00

229.3 31.1 NNW 64.4 NA

06:00

131.6 27.5 NNW 51.8 NA

07:00

48.4 23 N 35.7 NA

08:00

51.3 26.5 NNW 34.5 NA

09:00

161.2 21.9 N 33.4 NA

10:00

132.5 18.4 N   NA

11:00

148.6 18.4 NNW   NA

12:00

155.5 20.7 NNW   NA

13:00

114.4 16.1 NNW   NA

14:00

57.6 11.5 NNW   NA

15:00

16.5 11.5 N   NA

16:00

1.1 5.8 N   NA

17:00

5.2 3.5 NE   NA

18:00

36.7 3.5 NE   NA

19:00

12.8 calm calm   NA

20:00

15.0 calm calm   NA

21:00

11.8 calm calm   NA

22:00

3.8 6.9 S   NA

23:00

4.8 3.5 SSW   NA

24:00

2.1 calm calm   NA

Averages

72.4 21.0      

 

PM10 24 hour Concentration = 72.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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