NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report Month: May Year: 1989
Date Cloud cover Photometric Useful Useless
1 - 2 2 - 0 - 1 - 1   *  
2 - 3 8 - 8 - 8 - 8     *
3 - 4 8 - 8 - 8 - 8     *
4 - 5 5 - 1 - 0 - 0   *  
5 - 6 0 - 0 - 0 - 1 *    
6 - 7 1 - 2 - 3 - 4   *  
7 - 8 4 - 2 - 0 - 0   *  
8 - 9 0 - 0 - 0 - 0 *    
9 - 10 0 - 0 - 0 - 0 *    
10 - 11 0 - 0 - 1 - 1   *  
11 - 12 4 - 3 - 2 - 2   *  
12 - 13 8 - 8 - 8 - 8     *
13 - 14 8 - 8 - 5 - 7     *
14 - 15 1 - 0 - 0 - 0 *    
15 - 16 0 - 0 - 0 - 0 *    
16 - 17 0 - 0 - 0 - 0 *    
17 - 18 0 - 0 - 0 - 0 *    
18 - 19 1 - 1 - 1 - 1   *  
19 - 20 0 - 1 - 2 - 1   *  
20 - 21 3 - 7 - 6 - 3   *  
21 - 22 4 - 6 - 4 - 2   *  
22 - 23 1 - 2 - 4 - 5   *  
23 - 24 1 - 0 - 0 - 0 *    
24 - 25 0 - 0 - 0 - 0 *    
25 - 26 2 - 2 - 1 - 0   *  
26 - 27 0 - 0 - 0 - 0 *    
27 - 28 3 - 5 - 7 - 8   *  
28 - 29 2 - 0 - 0 - 0 *    
29 - 30 0 - 0 - 0 - 0 *    
30 - 31 0 - 0 - 0 - 0 *    
31 - 01 0 - 0 - 4 - 6   *  
Totals 13 14 4
Min. Med. Max.
Temperat. deg.F   23 63 82
Humidity % RH   02 10 100
Wind speed M/H   00 10 - 15 58
Water, precipitation this month 18 tot.year: 28.5
Report by: Oscar Saa