SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
March 19, 2015
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: March 19, 2015  9:09 AM MDT 
Date Issued for:

March 19, 2015  10:00 AM MDT

Date and Time Cancelled: March 19, 2015  4:00 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

6.8 calm calm   NA

02:00

19.7 5.8 WNW   NA

03:00

153.1 19.6 NNW   NA

04:00

33.3 10.4 NNW   NA

05:00

4.3 4.6 W   NA

06:00

74.3 5.8 W   NA

07:00

16.6 calm calm   NA

08:00

12.3 calm calm   NA

09:00

24.8 17.3 N   NA

10:00

34.1 26.5 NNW 34.5 NA

11:00

89.1 21.9 NNW   NA

12:00

93.8 20.7 NNW 33.4 NA

13:00

51.5 33.4 NNW 42.6 NA

14:00

42.7 24.2 NNW 40.3 NA

15:00

49.2 31.1 NNW 38 NA

16:00

106.0 24.2 NNW 33.4 NA

17:00

147.5 19.6 N 31.1 NA

18:00

180.9 13.8 N   NA

19:00

125.8 10.4 N   NA

20:00

56.8 5.8 NNW   NA

21:00

14.4 5.8 NW   NA

22:00

17.4 3.5 W   NA

23:00

14.5 3.5 SSW   NA

24:00

7.8 8.1 SSW   NA

Averages

57.4 15.0      

 

PM10 24 hour Concentration = 57.4 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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