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SOUTH DAKOTA Department of
Agriculture & Natural Resources

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Air Quality

 

Air Quality Alert - High Winds
December 23, 2020
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: December 22, 2020  3:40 AM MDT 
Date Issued for:

December 22, 2020, 2020  5:00 PM MDT

Date and Time Cancelled: December 23, 2020  5:00 PM MDT
PM Concentrations location: Credit Union
Weather Observations: Rapid City Regional Airport

Time

PM10
Concentration

Wind Speed

Direction

Peak Wind

Precipitation

(military)

(Credit Union -ug/m3)

(mph)

 

(mph >30)

(inches)

01:00

181.2 46 NNW 66 NA

02:00

471 49 NNW 79 NA

03:00

693.9 39 NNW 61 NA

04:00

527.6 47 NNW 66 NA

05:00

428.8 46 NNW 69 NA

06:00

205.7 45 NNW 63 NA

07:00

85.5 41 NNW 58 NA

08:00

39.7 37 NNW 51 NA

09:00

99.7 33 NNW 47 NA

10:00

115.4 35 NNW 55 NA

11:00

129.4 38 NNW 52 NA

12:00

18.9 30 NNW 51 NA

13:00

18.9 31 NNW 44 NA

14:00

67.2 29 NNW 41 NA

15:00

46.1 32 NW 43 NA

16:00

15.7 17 NW 0 NA

17:00

8.1 16 NW 0 NA

18:00

7.4 10 NW 0 NA

19:00

6.6 12 NW 0 NA

20:00

3.4 8 NW 0 NA

21:00

9 6 WNW 0 NA

22:00

89.4 0 Calm 0 NA

23:00

41.2 5 SSW 0 NA

24:00

7.6 0 Calm 0 NA

Averages

138.2 27.2 18    

 

PM10 24 hour Concentration = 138.2 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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