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SOUTH DAKOTA Department of
Agriculture & Natural Resources

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Air Quality

 

Air Quality Alert - High Winds
December 21, 2018
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: December 21, 2018   2:48 AM MST 
Date Issued for:

December 21, 2018   Noon MST

Date and Time Cancelled: December 21, 2018   5:00 PM MST
PM Concentrations location: Credit Union
Weather Observations:  Ellsworth Air Force Base

Time

PM10
Concentration

Wind Speed

Direction

Peak Wind

Precipitation

(military)

(Credit Union -ug/m3)

(mph)

 

(mph >30)

(inches)

01:00

15.9 9 SSW   NA

02:00

7.4 9 SSW   NA

03:00

7.9 6 S   NA

04:00

7.2 7 W   NA

05:00

49.5 5 W   NA

06:00

21.9 0 CALM   NA

07:00

70.6 0 CALM   NA

08:00

103.7 6 WSW   NA

09:00

53.5 0 CALM   NA

10:00

104.0 0 CALM   NA

11:00

148.0 5 S   NA

12:00

113.4 0 CALM   NA

13:00

397.4 43 NNW 66 NA

14:00

231.2 31 NNW 45 NA

15:00

17.2 30 NNW 40 NA

16:00

29.5 24 NNW 32 NA

17:00

20.6 17 NNW   NA

18:00

15.4 5 W   NA

19:00

16.1 5 S   NA

20:00

7.6 10 WNW   NA

21:00

11.7 12 NNW   NA

22:00

7.6 14 NW   NA

23:00

4.6 13 NW   NA

24:00

5.6 15 NW   NA

Averages

61.1 11.1      

 

PM10 24 hour Concentration = 61.1 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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