SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
April 1, 2012
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: April 1, 2012   5:40 PM MDT 
Date Issued for: April 1, 2012   6:00 PM MDT
Date and Time Cancelled: April 2, 2012   6:00 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

16.2 6.9 SSE   NA

02:00

35.6 9.2 S   NA

03:00

9.1 11.5 SW   NA

04:00

10.7 calm calm   0.00 in

05:00

11.9 calm calm   0.01 in

06:00

11.5 5.8 SSE   NA

07:00

4.4 4.6 SE   NA

08:00

6.6 6.9 S   NA

09:00

15.9 5.8 SSE   NA

10:00

17.4 8.1 S   NA

11:00

13.4 16.1 W   NA

12:00

12.3 16.1 W   NA

13:00

SV 10.4 W   NA

14:00

SV 6.9 VAR   NA

15:00

SV 10.4 W   NA

16:00

SV 6.9 W   NA

17:00

69.8 calm calm   NA

18:00

211.7 25.3 N 35.7 NA

19:00

201.2 24.2 N 33.4 NA

20:00

105.0 26.5 N 35.7 NA

21:00

65.0 28.8 NNW 41.4 NA

22:00

62.0 34.5 NNW 44.9 NA

23:00

49.3 38.0 NNW 47.2 NA

24:00

74.1 35.7 NNW 46.0 NA

Averages

50.2 13.9      

PM10 24 hour Concentration = 50.2 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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