NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: April		Year: 1980
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	0-0-0-0	*
2 - 3	6-4-2-0		*	*
3 - 4	2-6-6-6			*
4 - 5	7-7-7-8			*
5 - 6	3-5-5-5			*
6 - 7	8-8-1-1	*		*
7 - 8	2-0-1-5	*	*
8 - 9	0-0-6-6	*		*
9 - 10	8-8-8-8			*
10 - 11	8-8-8-8			*
11 - 12	8-8-8-8			*
12 - 13	8-5-5-8			*
13 - 14	1-0-0-4	*	*
14 - 15	0-0-3-1	*	*
15 - 16	2-1-2-2	*	*
16 - 17	8-4-1-6		*	*
17 - 18	6-7-7-7			*
18 - 19	6-7-7-7			*
19 - 20	6-6-7-5			*
20 - 21	8-6-7-8			*
21 - 22	0-1-0-0	*
22 - 23	4-4-4-7			*
23 - 24	8-8-8-8			*
24 - 25	0-0-0-1	*
25 - 26	3-3-0-0	*	*
26 - 27	3-2-3-1	*	*
27 - 28	3-5-7-7			*
28 - 29	8-8-8-8			*
29 - 30	3-0-0-0	*	*
30 - 01	0-0-0-0	*
	Totals	13	9	19
		Min.	Med.	Max.
Temperat. deg.F		34	57	76
Humidity % RH		06		100
Wind speed M/H			46	81
Water, precipitation	this month	77.7mm	tot.year:	81.5mm
			Report by: Oscar Saa