Metric (Imperial)

Date	Time (cst)	Wind (kph)	Vis. (km)	Weather	Sky Cond.	Temperature (ºC)				Relative Humidity	Wind Chill (°C)	Heat Index (°C)	Pressure		Precipitation (cm)
						Air	Dwpt	6 hour					altimeter (cm)	sea level (mb)	1 hr	3 hr	6 hr
								Max.	Min.
29	03:15	NE 15	16.09	Fair	CLR	-6.5	-10.8			72%	-12		76.73	0.0
29	02:55	NE 11	16.09	Fair	CLR	-6.2	-10.8			70%	-11		76.73	0.0
29	02:35	NE 9	16.09	Fair	CLR	-6.1	-10.8			70%	-10		76.73	0.0
29	02:15	NE 11	16.09	Fair	CLR	-6	-10.8			69%	-10		76.73	0.0
29	01:55	NE 13	16.09	Fair	CLR	-6	-11			68%	-11		76.71	0.0
29	01:35	NE 15	16.09	Fair	CLR	-6.1	-11			69%	-11		76.68	0.0
29	01:15	NE 17	16.09	Fair	CLR	-5.7	-10.7			68%	-11		76.68	0.0
29	00:55	NE 13	16.09	Fair	CLR	-5.4	-10.5			68%	-10		76.68	0.0
29	00:35	NE 13	16.09	Fair	CLR	-4.6	-9.7			68%	-9		76.68	0.0
29	00:15	NE 15	16.09	Fair	CLR	-4.7	-8.9			73%	-10		76.68	0.0
28	23:55	NE 11	16.09	Fair	CLR	-5	-8.3	-0.3	-5.1	78%	-9		76.71	0.0
28	23:35	NE 6	16.09	Fair	CLR	-4.5	-8.1			76%			76.71	0.0
28	23:15	Calm	16.09	Fair	CLR	-4.5	-8.2			76%			76.73	0.0
28	22:55	E 7	16.09	Fair	CLR	-4.3	-8.2			75%	-7		76.71	0.0
28	22:35	E 6	16.09	Fair	CLR	-4.2	-8.1			75%			76.73	0.0
28	22:15	Calm	16.09	Fair	CLR	-4.2	-7.9			76%			76.73	0.0
28	21:55	E 6	16.09	Fair	CLR	-3.5	-8			71%			76.73	0.0
28	21:35	Calm	16.09	Fair	CLR	-3.3	-7.7			72%			76.73	0.0
28	21:15	E 6	16.09	Fair	CLR	-3.2	-7.6			72%			76.76	0.0
28	20:55	E 6	16.09	Fair	CLR	-3	-7.5			71%			76.73	0.0
28	20:35	E 6	16.09	Fair	CLR	-2.7	-7.2			72%			76.71	0.0
28	20:15	E 6	16.09	Fair	CLR	-2.5	-7			72%			76.71	0.0
28	19:55	E 6	16.09	Fair	CLR	-2.2	-7.1			69%			76.71	0.0
28	19:35	E 11	16.09	Fair	CLR	-1.8	-7.2			67%	-5		76.73	0.0
28	19:15	E 7	16.09	Fair	CLR	-1.6	-7.1			66%	-4		76.73	0.0
28	18:55	E 7	16.09	Fair	CLR	-1.5	-7			67%	-4		76.71	0.0
28	18:35	E 7	16.09	Fair	CLR	-1.1	-6.7			66%	-3		76.71	0.0
28	18:15	E 7	16.09	Fair	CLR	-0.8	-6.1			68%	-3		76.68	0.0
28	17:55	E 9	16.09	Fair	CLR	-0.3	-6.5	1.6	-2.2	63%	-3		76.66	0.0
28	17:35	E 7	16.09	Fair	CLR	0	-6.1			64%	-2		76.66	0.0
28	17:15	E 7	16.09	Fair	CLR	0.3	-5.5			65%	-2		76.63	0.0
28	16:55	E 6	16.09	Fair	CLR	0.7	-6			61%			76.63	0.0
28	16:35	SE 6	16.09	Fair	CLR	1	-6			60%			76.63	0.0
28	16:15	SE 6	16.09	Fair	CLR	1.1	-6			60%			76.63	0.0
28	15:55	E 6	16.09	Fair	CLR	1.2	-6.1			59%			76.61	0.0
28	15:35	E 6	16.09	Fair	CLR	1.6	-6.2			57%			76.63	0.0
28	15:15	E 7	16.09	Fair	CLR	0.8	-6.6			58%	-1		76.61	0.0
28	14:55	SE 7	16.09	Fair	CLR	0.9	-6.6			58%	-1		76.61	0.0
28	14:35	E 6	16.09	Fair	CLR	0.7	-6.5			59%			76.63	0.0
28	14:15	NE 6	16.09	Fair	CLR	0.2	-7.2			58%			76.61	0.0
28	13:55	NE 6	16.09	Fair	CLR	0.1	-7.1			59%			76.63	0.0
28	13:35	NE 7	16.09	Fair	CLR	0	-7.5			57%	-2		76.68	0.0
28	13:15	N 7	16.09	Fair	CLR	-0.3	-7.6			58%	-3		76.71	0.0
28	12:55	NE 7	16.09	Fair	CLR	-1.2	-8.1			60%	-4		76.73	0.0
28	12:35	N 7	16.09	Fair	CLR	-1.3	-8.1			60%	-4		76.78	0.0
28	12:15	N 6	16.09	Fair	CLR	-1.7	-8.4			61%			76.81	0.0
28	11:55	NE 6	16.09	Fair	CLR	-2.3	-8.5	-2.3	-12.6	63%			76.84	0.0
28	11:35	N 7	16.09	Fair	CLR	-3.5	-9.1			66%	-6		76.86	0.0
28	11:15	N 6	16.09	Fair	CLR	-4.5	-9.9			66%			76.89	0.0
28	10:55	N 9	16.09	Fair	CLR	-5.6	-10.2			70%	-9		76.94	0.0
28	10:35	N 13	16.09	Fair	CLR	-5.5	-10.1			70%	-10		76.94	0.0
28	10:15	N 15	16.09	Fair	CLR	-5.9	-10.5			70%	-11		76.94	0.0
28	09:55	NW 11	16.09	Fair	CLR	-6.5	-11.2			70%	-11		76.91	0.0
28	09:35	W 9	16.09	Fair	CLR	-7.4	-11.9			71%	-11		76.86	0.0
28	09:15	SW 9	16.09	Fair	CLR	-8.9	-13.1			72%	-13		76.84	0.0
28	08:55	SW 6	16.09	Fair	CLR	-9.7	-13.7			73%			76.89	0.0
28	08:35	Calm	16.09	Fair	CLR	-10.8	-14.1			77%			76.89	0.0
28	08:15	Calm	16.09	Fair	CLR	-11.7	-15.1			76%			76.89	0.0
28	07:55	SW 6	16.09	Fair	CLR	-12.2	-15.4			77%			76.84	0.0
28	07:35	Calm	16.09	Fair	CLR	-12	-15			79%			76.86	0.0
28	07:15	Calm	16.09	Fair	CLR	-12.5	-15.4			79%			76.89	0.0
28	06:55	Calm	16.09	Fair	CLR	-12	-15			79%			76.89	0.0
28	06:35	Calm	16.09	Fair	CLR	-12	-15.2			77%			76.89	0.0
28	06:15	S 6	16.09	Fair	CLR	-11.4	-14.9			76%			76.89	0.0
28	05:55	SW 6	16.09	Fair	CLR	-11.2	-14.6	-7.2	-11.5	76%			76.91	0.0
28	05:35	SW 7	16.09	Fair	CLR	-11.4	-15			75%	-15		76.91	0.0
28	05:15	SW 9	16.09	Fair	CLR	-10.8	-14.5			74%	-15		76.94	0.0
28	04:55	S 11	16.09	Fair	CLR	-10.5	-14.2			75%	-16		76.96	0.0
28	04:35	S 9	16.09	Fair	CLR	-10.8	-14.5			74%	-15		76.96	0.0
28	04:15	S 6	16.09	Fair	CLR	-10.8	-14.1			77%			76.99	0.0
28	03:55	S 6	16.09	Fair	CLR	-11.4	-14.8			76%			77.01	0.0
28	03:35	S 7	16.09	Fair	CLR	-10.5	-14.2			75%	-14		77.04	0.0
28	03:15	SW 6	16.09	Fair	CLR	-10.4	-14.1			75%			77.04	0.0
28	02:55	S 7	16.09	Fair	CLR	-10	-14			73%	-14		77.06	0.0
28	02:35	S 9	16.09	Fair	CLR	-9.8	-13.9			72%	-14		77.04	0.0
28	02:15	Calm	16.09	Fair	CLR	-10	-13.9			73%			77.06	0.0
28	01:55	SW 7	16.09	Fair	CLR	-9.5	-13.6			72%	-13		77.09	0.0
28	01:35	SW 7	16.09	Fair	CLR	-9	-13.2			72%	-13		77.09	0.0
28	01:15	SW 9	16.09	Fair	CLR	-8.3	-12.9			70%	-12		77.06	0.0
28	00:55	SW 7	16.09	Partly Cloudy	SCT100	-8.4	-12.5			73%	-12		77.06	0.0
28	00:35	SW 7	16.09	Overcast	OVC100	-8	-12			73%	-11		77.09	0.0
28	00:15	SW 7	16.09	Overcast	OVC100	-7.4	-12			70%	-11		77.17	0.0
27	23:55	SW 6	16.09	Overcast	OVC100	-7.5	-12	-5	-9.2	71%			77.14	0.0
27	23:35	Calm	16.09	Overcast	OVC100	-7.9	-12.7			69%			77.14	0.0
27	23:15	Calm	16.09	Overcast	OVC100	-8.4	-13			70%			77.14	0.0
27	22:55	SW 6	16.09	Partly Cloudy	SCT100	-9.1	-13.3			72%			77.14	0.0
27	22:35	SW 9	16.09	Fair	CLR	-8	-13			68%	-12		77.14	0.0
27	22:15	Calm	16.09	Mostly Cloudy	BKN100	-7.7	-12.4			69%			77.14	0.0
27	21:55	Calm	16.09	Overcast	OVC100	-6.5	-11.7			67%			77.17	0.0
27	21:35	Calm	16.09	Overcast	OVC100	-6	-11.2			67%			77.17	0.0
27	21:15	Calm	16.09	Overcast	OVC100	-6.1	-11.5			66%			77.19	0.0
27	20:55	W 6	16.09	Overcast	OVC110	-6.2	-11.8			65%			77.19	0.0
27	20:35	W 6	16.09	Overcast	OVC110	-6.5	-11.6			67%			77.19	0.0
27	20:15	W 6	16.09	Overcast	OVC110	-6.5	-11.4			69%			77.22	0.0
27	19:55	W 7	16.09	Overcast	OVC110	-6.9	-11.5			70%	-10		77.22	0.0
27	19:35	W 7	16.09	Partly Cloudy	SCT110	-7.5	-12.5			68%	-11		77.22	0.0
27	19:15	Calm	16.09	Mostly Cloudy	BKN120	-7.4	-12.5			67%			77.22	0.0
27	18:55	W 6	16.09	Mostly Cloudy	BKN120	-7	-12.4			66%			77.22	0.0
27	18:35	NW 6	16.09	Overcast	OVC120	-5.9	-11.1			67%			77.22	0.0
27	18:15	NW 7	16.09	Overcast	OVC110	-5.5	-10.5			68%	-9		77.19	0.0
27	17:55	NW 6	16.09	Overcast	OVC110	-4.9	-10.8	-2.6	-4.9	64%			77.19	0.0
27	17:35	NW 7	16.09	Overcast	OVC110	-4.3	-11.6			57%	-7		77.19	0.0
27	17:15	NW 6	16.09	Overcast	OVC110	-4.2	-11.5			57%			77.22	0.0
27	16:55	W 9	16.09	Overcast	OVC120	-3.7	-12.4			51%	-7		77.19	0.0
27	16:35	NW 13	16.09	Overcast	OVC120	-3.7	-12.6			50%	-8		77.19	0.0
27	16:15	NW 11	16.09	Overcast	OVC110	-3.5	-12.9			49%	-7		77.19	0.0
27	15:55	NW 11	16.09	Overcast	OVC120	-3.5	-12.6			50%	-7		77.17	0.0
27	15:35	NW 13	16.09	Overcast	OVC120	-3.5	-12.8			49%	-8		77.17	0.0
27	15:15	NW 11	16.09	Overcast	SCT100 OVC120	-3.1	-13.1			46%	-7		77.17	0.0
27	14:55	NW 13	16.09	Overcast	OVC110	-3.2	-12.7			48%	-7		77.14	0.0
27	14:35	N 9	16.09	Overcast	OVC110	-3.2	-13.2			46%	-6		77.17	0.0
27	14:15	NW 15	16.09	Mostly Cloudy	BKN120	-3.2	-13.4			46%	-8		77.17	0.0
27	13:55	N 20	16.09	Partly Cloudy	SCT120	-3.1	-13.5			45%	-9		77.17	0.0
27	13:35	N 13	16.09	Partly Cloudy	SCT120	-3.4	-13.4			46%	-8		77.17	0.0
27	13:15	N 20	16.09	Fair	CLR	-3.5	-13.2			47%	-9		77.19	0.0
27	12:55	N 19	16.09	Fair	CLR	-3.3	-12.9			48%	-9		77.19	0.0
27	12:35	N 17 G 26	16.09	Fair	CLR	-4.4	-14.3			46%	-10		77.19	0.0
27	12:15	N 19	16.09	Fair	CLR	-4.1	-14			46%	-10		77.19	0.0
27	11:55	N 20	16.09	Fair	CLR	-4.3	-13.9	-4.2	-15	48%	-10		77.22	0.0
27	11:35	N 24	16.09	Fair	CLR	-4.4	-13.8			48%	-11		77.24	0.0
27	11:15	N 22	16.09	Fair	CLR	-5	-14.1			49%	-11		77.24	0.0
27	10:55	N 22	16.09	Fair	CLR	-5.1	-13.9			50%	-12		77.24	0.0
27	10:35	N 19	16.09	Fair	CLR	-5.5	-13.9			52%	-11		77.24	0.0
27	10:15	N 19	16.09	Fair	CLR	-5.6	-13.9			52%	-12		77.19	0.0
27	09:55	N 20	16.09	Fair	CLR	-5.6	-13.4			55%	-12		77.19	0.0
27	09:35	N 17	16.09	Fair	CLR	-6.3	-13.2			58%	-12		77.17	0.0
27	09:15	N 17	16.09	Fair	CLR	-7	-12.6			65%	-13		77.14	0.0
27	08:55	NW 7	16.09	Fair	CLR	-10.9	-13.8			79%	-15		77.11	0.0
27	08:35	Calm	16.09	Fair	CLR	-11.3	-13.6			83%			77.09	0.0
27	08:15	N 6	16.09	Fair	CLR	-10.6	-13.4			80%			77.04	0.0
27	07:55	NW 6	16.09	Fair	CLR	-13.3	-15.4			84%			77.01	0.0
27	07:35	Calm	16.09	Fair	CLR	-14.1	-16.5			82%			76.99	0.0
27	07:15	NW 6	16.09	Fair	CLR	-13.4	-15.6			84%			76.96	0.0
27	06:55	NW 7	16.09	Fair	CLR	-13.7	-15.9			84%	-18		76.94	0.0
27	06:35	Calm	16.09	Fair	CLR	-12.6	-14.4			87%			76.91	0.0
27	06:15	W 7	16.09	Fair	CLR	-14.6	-16.5			86%	-19		76.89	0.0
27	05:55	Calm	16.09	Fair	CLR	-12.3	-13.8	-5.8	-13.5	89%			76.86	0.0
27	05:35	Calm	16.09	Fair	CLR	-12.4	-14			88%			76.84	0.0
27	05:15	Calm	16.09	Fair	CLR	-13	-14.8			87%			76.81	0.0
27	04:55	Calm	16.09	Fair	CLR	-12.8	-14.6			87%			76.78	0.0
27	04:35	NW 7	16.09	Fair	CLR	-12.9	-14.9			85%	-17		76.76	0.0
27	04:15	Calm	16.09	Fair	CLR	-11.6	-13.2			88%			76.71	0.0
27	03:55	Calm	16.09	Fair	CLR	-11.7	-13.3			88%			76.71	0.0
27	03:35	Calm	16.09	Fair	CLR	-12.6	-14.4			87%			76.68	0.0
27	03:15	Calm	16.09	Fair	CLR	-11.2	-13			87%			76.68	0.0
27	02:55	Calm	16.09	Fair	CLR	-12.6	-14.7			84%			76.63	0.0
27	02:35	Calm	16.09	Fair	CLR	-9.8	-11.6			87%			76.61	0.0
27	02:15	W 6	16.09	Fair	CLR	-10	-11.8			87%			76.61	0.0
27	01:55	Calm	16.09	Fair	CLR	-11.9	-14			85%			76.58	0.0
27	01:35	Calm	16.09	Fair	CLR	-10	-12.9			80%			76.56	0.0
27	01:15	Calm	16.09	Fair	CLR	-9	-12.2			78%			76.53	0.0
27	00:55	Calm	16.09	Fair	CLR	-7.9	-11.1			78%			76.53	0.0
27	00:35	Calm	16.09	Fair	CLR	-8	-10.7			81%			76.5	0.0
27	00:15	W 6	16.09	Fair	CLR	-7.1	-10.6			76%			76.5	0.0
26	23:55	SW 11	16.09	Fair	CLR	-5.9	-9.6	-5.5	-6.8	75%	-10		76.5	0.0
26	23:35	SW 15	16.09	Fair	CLR	-5.5	-9.5			74%	-11		76.5	0.0
26	23:15	SW 13	16.09	Fair	CLR	-6.6	-10			77%	-12		76.48	0.0
26	22:55	SW 9	16.09	Fair	CLR	-5.6	-9.5			74%	-9		76.48	0.0
26	22:35	SW 15	16.09	Fair	CLR	-6.3	-10			75%	-12		76.45	0.0
26	22:15	S 11	16.09	Fair	CLR	-6.1	-9.8			75%	-10		76.48	0.0
26	21:55	SW 11	16.09	Fair	CLR	-5.6	-9.5			74%	-10		76.5	0.0
26	21:35	S 9	16.09	Fair	CLR	-6.4	-9.8			77%	-10		76.5	0.0
26	21:15	S 11	16.09	Fair	CLR	-6.6	-10.1			76%	-11		76.5	0.0
26	20:55	S 11	16.09	Fair	CLR	-6.6	-10.1			76%	-11		76.5	0.0
26	20:35	SW 13	16.09	Fair	CLR	-6.1	-10			74%	-11		76.53	0.0
26	20:15	SW 15	16.09	Fair	CLR	-6.5	-10.1			76%	-12		76.53	0.0
26	19:55	S 11	16.09	Fair	CLR	-6.5	-10.3			75%	-11		76.53	0.0
26	19:35	SW 13	16.09	Fair	CLR	-6.3	-10.3			74%	-11		76.53	0.0
26	19:15	S 13	16.09	Fair	CLR	-6	-10.1			73%	-11		76.56	0.0
26	18:55	SW 15	16.09	Fair	CLR	-5.9	-10.2			72%	-11		76.53	0.0
26	18:35	SW 17	16.09	Fair	CLR	-6	-10.2			73%	-12		76.53	0.0
26	18:15	SW 20	16.09	Fair	CLR	-6.1	-10.5			71%	-12		76.53	0.0
26	17:55	SW 19	16.09	Fair	CLR	-5.7	-10.3	-4.6	-11	70%	-12		76.56	0.0
26	17:35	SW 17	16.09	Fair	CLR	-5.5	-10.4			69%	-11		76.56	0.0
26	17:15	SW 20	16.09	Fair	CLR	-5	-10.3			67%	-11		76.56	0.0
26	16:55	SW 19	16.09	Fair	CLR	-4.7	-10.3			65%	-10		76.58	0.0
26	16:35	SW 22 G 33	16.09	Fair	CLR	-4.7	-10.3			65%	-11		76.58	0.0
26	16:15	SW 24	16.09	Fair	CLR	-4.7	-10.4			65%	-11		76.61	0.0
26	15:55	SW 24	16.09	Fair	CLR	-4.8	-10.5			65%	-11		76.58	0.0
26	15:35	SW 26	16.09	Fair	CLR	-5.2	-11			64%	-12		76.58	0.0
26	15:15	SW 28	16.09	Fair	CLR	-5.9	-11.3			66%	-13		76.58	0.0
26	14:55	SW 31	16.09	Fair	CLR	-6.4	-11.9			65%	-14		76.61	0.0
26	14:35	SW 33 G 48	11.27	Fair and Breezy	CLR	-6.5	-12.1			65%	-15		76.61	0.0
26	14:15	SW 33 G 43	16.09	Fair and Breezy	CLR	-6.5	-12.2			64%	-15		76.63	0.0
26	13:55	SW 30 G 43	16.09	Fair	CLR	-7	-12.4			66%	-15		76.66	0.0
26	13:35	SW 30 G 41	16.09	Fair	CLR	-8.1	-13.3			67%	-16		76.73	0.0
26	13:15	SW 30	16.09	Fair	CLR	-9.1	-14.4			66%	-18		76.78	0.0
26	12:55	SW 33 G 43	11.27	Fair and Breezy	CLR	-9.5	-14.7			66%	-19		76.81	0.0
26	12:35	SW 30	16.09	Fair	CLR	-10	-15.3			66%	-19		76.84	0.0
26	12:15	SW 26	16.09	Fair	CLR	-10.5	-15.9			65%	-19		76.89	0.0
26	11:55	S 30 G 37	11.27	Fair	CLR	-11	-16.5	-11	-25	64%	-20		76.96	0.0
26	11:35	SW 33	11.27	Fair and Breezy	CLR	-11.6	-17.4			62%	-21		77.01	0.0
26	11:15	SW 30 G 37	11.27	Fair	CLR	-12.5	-18.2			63%	-22		77.04	0.0
26	10:55	SW 30 G 41	6.44	Fair with Haze	CLR	-13.4	-19			63%	-23		77.09	0.0
26	10:35	SW 26 G 33	11.27	Fair	CLR	-14.2	-20			62%	-24		77.14	0.0
26	10:15	SW 22	16.09	Fair	CLR	-14.9	-20.6			62%	-24		77.17	0.0
26	09:55	SW 19	16.09	Fair	CLR	-16	-20.8			67%	-24		77.22	0.0
26	09:35	SW 19	16.09	Fair	CLR	-16.9	-20.7			73%	-26		77.24	0.0
26	09:15	S 11	16.09	Fair	CLR	-17.9	-21			77%	-25		77.24	0.0
26	08:55	SW 11	16.09	Fair	CLR	-19.1	-22			78%	-26		77.29	0.0
26	08:35	SW 7	16.09	Fair	CLR	-20.4	-23.1			79%	-26		77.32	0.0
26	08:15	SW 11	16.09	Fair	CLR	-21.6	-24.4			78%	-29		77.32	0.0
26	07:55	SW 11	16.09	Fair	CLR	-22.8	-25.7			77%	-30		77.32	0.0
26	07:35	SW 7	16.09	Fair	CLR	-24.4	-27.2			78%	-30		77.34	0.0
26	07:15	Calm	16.09	Fair	CLR	-24.4	-27.2			78%			77.34	0.0
26	06:55	Calm	16.09	Fair	CLR	-23.1	-25.9			78%			77.37	0.0
26	06:35	Calm	16.09	Fair	CLR	-23.5	-26			80%			77.37	0.0
26	06:15	Calm	16.09	Fair	CLR	-24	-26.6			79%			77.37	0.0
26	05:55	Calm	16.09	Fair	CLR	-24.8	-27.7	-17	-24.8	77%			77.37	0.0
26	05:35	W 6	16.09	Partly Cloudy	SCT002	-23.1	-25.8			79%			77.39	0.0
26	05:15	Calm	2.01	Light Snow	SCT002	-23.5	-26.2			79%			77.39	0.0
26	04:55	W 7	6.44	Light Snow	CLR	-23.8	-26.4			79%	-30		77.39	0.0
26	04:35	W 7	16.09	Fair	CLR	-24	-26.5			80%	-30		77.39	0.0
26	04:15	W 6	16.09	Fair	CLR	-24.5	-27.1			79%			77.39	0.0
26	03:55	W 7	16.09	Fair	CLR	-22.9	-25.3			81%	-29		77.42	0.0
26	03:35	W 7	16.09	Fair	CLR	-22.4	-24.8			81%	-28		77.44	0.0
Date	Time (cst)	Wind (kph)	Vis. (km)	Weather	Sky Cond.	Air	Dwpt	Max.	Min.	Relative Humidity	Wind Chill (°C)	Heat Index (°C)	altimeter (cm)	sea level (mb)	1 hr	3 hr	6 hr
								6 hour
						Temperature (ºC)							Pressure		Precipitation (cm)