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SOUTH DAKOTA Department of
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Air Quality

 

Air Quality Alert - High Winds
February 3, 2021
(PM10 Concentration and Meteorological Observations)
Click here for a graphical representation

Date and Time Issued: February 3, 2021  3:22 AM MDT 
Date Issued for:

February 3, 2021, 2021  1:00 PM MDT

Date and Time Cancelled: February 3, 2021  8:00 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

21.7 0 Calm 0 NA

02:00

31 6 ESE 0 NA

03:00

19.4 3 ESE 0 NA

04:00

28.8 0 Calm 0 NA

05:00

37.5 0 Calm 0 NA

06:00

15.4 0 Calm 0 NA

07:00

22.4 3 SSE 0 NA

08:00

7.1 3 VAR 0 NA

09:00

12.7 12 SW 0 NA

10:00

50.5 16 SSW 0 NA

11:00

194.5 25 N 33 NA

12:00

439.8 40 NNW 53 NA

13:00

182.8 38 NNW 56 NA

14:00

115.9 33 NNW 52 NA

15:00

53.2 37 NNW 51 NA

16:00

27.1 36 NNW 47 NA

17:00

45.1 29 NNW 44 NA

18:00

21.9 28 NNW 39 NA

19:00

16.1 28 NNW 39 NA

20:00

10 26 NNW 36 NA

21:00

8.4 22 NNW 30 NA

22:00

76.5 24 NNW 33 NA

23:00

117.7 21 N 0 NA

24:00

82.4 25 NNW 43 NA

Averages

68.2 19 18    

 

PM10 24 hour Concentration = 68.2 ug/m3 Credit Union (West Rapid City)

PM10 24 hour Standard = 150 ug/m3

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