NPS: Nature & Science» Air Resources Division–Current Air Pollutant and Weather Data at Yellowstone National Park

Current Air Pollutant and Weather Data at Yellowstone National Park

Yesterday's Data	Ozone Data

Air Pollutant and Weather Data Wednesday January 14, 2009
Hour Beginning (Local Standard Time)	Carbon Monoxide (parts per million)	Particulate Matter (PM2.5) (micrograms per cubic meter)	Wind Speed (meters per second)	Wind Direction	Temperature (degrees C)	Relative Humidity (%)
12 AM	0.09	--	0.6	NE	-4.3	92
1 AM	0.09	--	0.4	E	-4.8	93
2 AM	0.09	--	0.7	W	-5.2	91
3 AM	0.09	--	0.1	E	-6.2	94
4 AM	0.10	4.1	0.8	NE	-5.8	90
5 AM	0.10	2.2	0.5	E	-6.1	91
6 AM	0.10	3.6	0.2	E	-7.7	94
7 AM	0.10	6.2	0.5	E	-8.7	93
8 AM	0.13	6.9	0.1	SE	-10.7	95
9 AM	0.24	1.5	0.0	N	-8.2	93
10 AM	0.24	0.0	0.3	SE	-4.4	85
11 AM	0.11	0.0	0.8	SE	-2.2	71
12 PM	0.11	0.0	1.3	W	-1.6	66
1 PM	0.14	2.0	2.0	W	-1.8	70
2 PM	0.11	9.1	1.7	W	-2.3	74
3 PM	0.11	1.4	0.4	SW	-2.2	71
4 PM	0.11	4.6	0.5	NE	-2.8	73
5 PM	0.11	4.0	0.6	E	-3.3	73