NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: April		Year: 1977
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	0-0-0-0	*
2 - 3	0-0-0-0	*
3 - 4	1-0-0-0	*
4 - 5	1-2-8-8		*	*
5 - 6	4-6-8-8			*
6 - 7	8-8-8-8			*
7 - 8	5-8-8-8			*
8 - 9	2-1-0-0	*
9 - 10	2-1-0-0	*
10 - 11	4-2-0-0		*
11 - 12	0-0-4-7		*
12 - 13	0-0-1-1	*
13 - 14	2-0-0-0	*
14 - 15	1-2-2-2	*
15 - 16	1-1-0-0	*
16 - 17	0-0-0-0	*
17 - 18	0-0-0-0	*
18 - 19	1-1-1-1	*
19 - 20	1-0-0-0	*
20 - 21	0-0-0-0	*
21 - 22	0-0-0-0	*
22 - 23	0-0-0-0	*
23 - 24	3-4-7-4			*
24 - 25	8-8-6-8			*
25 - 26	0-0-0-0	*
26 - 27	0-0-0-0	*
27 - 28	0-0-0-0	*
28 - 29	0-0-0-0	*
29 - 30	1-1-2-2	*
30 - 01	1-2-4-8	*	*
	Totals	22	4	6
		Min.	Med.	Max.
Temp. Deg. F		36	57	77
Humidity % RH		2		97
Wind speed M/H			33	56
Water, precipitation	this month	04mm	tot.year:	04mm
			Report by: Oscar Saa