NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report
April
1999
Date
Cloud cover
Photometric
Useful
Useless
1 - 2
8-8-8-8
*
2 - 3
0-2-3-3
*
3 - 4
0-0-1-1
*
4 - 5
0-0-0-0
*
5 - 6
0-0-0-0
*
6 - 7
0-0-0-0
*
7 - 8
0-0-0-0
*
8 - 9
0-0-0-0
*
9 - 10
0-0-0-0
*
10 - 11
0-0-0-0
*
11 - 12
0-0-0-0
*
12 - 13
0-3-5-1
*
13 - 14
0-0-0-0
*
14 - 15
0-0-0-0
*
15 - 16
0-0-0-0
*
16 - 17
0-0-0-0
*
17 - 18
4-4-1-1
*
18 - 19
0-0-0-0
*
19 - 20
0-0-0-0
*
20 - 21
6-4-1-1
*
21 - 22
0-0-0-1
*
22 - 23
7-7-7-7
*
23 - 24
7-7-7-7
*
24 - 25
7-7-7-7
*
25 - 26
6-0-0-0
*
26 - 27
0-0-0-0
*
27 - 28
0-0-0-0
*
28 - 29
6-1-0-0
*
29 - 30
4-3-2-3
*
30 - 31
5-6-4-2
*
Totals
16
9
5
Min.
Med.
Max.
Temperat. deg.C
3.5
16
21
Humidity % RH
~10
28
100
Wind speed M/H
0
10
55
Water, precipitation
this month
8.2mm
tot.year:
9.2mm
Report by: Oscar Saa