NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: May		Year: 1999
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	1-1-0-0		*
2 - 3	0-0-1-1		*
3 - 4	2-5-7-8			*
4 - 5	7-7-7-7			*
5 - 6	1-1-1-1		*
6 - 7	1-0-0-0	*
7 - 8	1-1-0-0		*
8 - 9	5-4-4-3		*
9 - 10	0-0-0-0	*
10 - 11	0-0-0-0	*
11 - 12	2-1-0-0		*
12 - 13	3-3-1-0		*
13 - 14	1-1-1-1		*
14 - 15	1-1-0-0		*
15 - 16	4-3-1-0		*
16 - 17	0-0-0-0	*
17 - 18	0-0-0-0	*
18 - 19	1-0-0-1		*
19 - 20	1-0-0-1		*
20 - 21	1-0-0-0	*
21 - 22	1-0-0-0	*
22 - 23	0-0-0-0	*
23 - 24	8-8-8-8			*
24 - 25	0-0-6-7		*
25 - 26	8-4-8-3			*
26 - 27	8-8-8-8			*
27 - 28	7-7-7-7			*
28 - 29	4-3-2-0		*
29 - 30	1-2-6-4		*
30 - 31	0-0-0-0	*
31 - 01	0-0-1-1		*
	Totals	9	16	6
		Min.	Med.	Max.
Temperat. deg.C		-1	8.5	20
Humidity % RH		10	25	100
Wind speed M/H		0	8	30
Water, precipitation	this month	17.5	tot.year:	26.7
			Report by: Oscar Saa