NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: April		Year: 1987
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	0-0-0-0	*
2 - 3	0-1-2-2		*
3 - 4	0-0-0-0	*
4 - 5	3-4-5-1		*
5 - 6	0-0-0-0	*
6 - 7	0-0-0-0	*
7 - 8	0-0-2-2		*
8 - 9	0-0-2-4		*
9 - 10	3-1-0-0		*
10 - 11	2-1-1-3		*
11 - 12	0-0-0-0	*
12 - 13	0-0-0-0	*
13 - 14	0-0-0-0	*
14 - 15	4-7-8-8			*
15 - 16	0-1-1-1		*
16 - 17	0-0-0-0	*
17 - 18	0-0-0-0	*
18 - 19	0-0-0-0	*
19 - 20	3-3-4-8		*
20 - 21	5-5-2-4		*
21 - 22	7-4-1-8		*
22 - 23	1-2-2-2		*
23 - 24	2-2-1-1		*
24 - 25	3-2-4-4		*
25 - 26	6-6-3-2		*
26 - 27	1-1-1-1		*
27 - 28	0-0-0-0	*
28 - 29	0-0-0-0	*
29 - 30	6-6-7-7			*
30 - 31	7-1-0-0		*
31 - 01		12	16	2
	Totals
		Min.	Med.	Max.
Temp. Deg. F		31	57	78
Humidity % RH		<10	~35	100
Wind speed M/H		0	~9	38
Water, precipitation	this month	1mm	tot.year:	1.5mm
			Report by: Oscar Saa