NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: May		Year: 1977
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	6-8-8-7			*
2 - 3	2-0-0-0	*
3 - 4	1-1-1-4		*
4 - 5	3-6-8-8			*
5 - 6	8-8-8-8			*
6 - 7	8-5-1-6			*
7 - 8	2-4-3-2		*	*
8 - 9	1-0-1-0	*
9 - 10	0-0-1-1	*
10 - 11	0-0-0-0	*
11 - 12	0-0-0-0	*
12 - 13	0-0-0-0	*
13 - 14	0-1-1-0	*
14 - 15	2-1-1-1	*
15 - 16	3-4-4-1		*	*
16 - 17	1-2-3-4		*	*
17 - 18	1-3-6-7		*	*
18 - 19	8-8-4-1			*
19 - 20	0-0-0-0	*
20 - 21	3-2-2-1	*
21 - 22	1-0-0-1	*
22 - 23	2-2-1-1	*
23 - 24	0-0-1-3	*
24 - 25	2-0-0-0	*
25 - 26	1-1-1-1	*
26 - 27	0-0-1-0	*
27 - 28	8-8-6-1			*
28 - 29	0-0-0-0	*
29 - 30	0-0-0-0	*
30 - 31	2-2-2-2	*
31 - 01	0-0-1-0	*
	Totals	20	5	10
		Min.	Med.	Max.
Temp. Deg. F		38	52	78
Humidity % RH		2		98
Wind speed M/H			32	55
Water, precipitation	this month	5mm	tot.year:	9mm
			Report by: Oscar Saa