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Barbosa

5.932° N   73.615° W  ·  1580 M
69 /100
PEAK
Worth setting up — 8 hours of workable sky from 21:00.
BEST WINDOW 21:00–05:00 · ASTRO DARK 20:00–05:00 · MOON 1%
Transparency
0.52
Seeing
1.00
Cloud
19%
Moon
1%

Good tonight

Hour by hour, local to Barbosa. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
18
19
20
21
22
23
00
01
02
03
04
05
06
0
16
34
40
41
47
50
51
53
69
65
30
0
BEST WINDOW
Low cloud
0%
2%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
23%
22%
11%
4%
5%
3%
2%
6%
14%
6%
9%
10%
2%
High cloud
99%
99%
95%
88%
84%
70%
64%
59%
42%
14%
17%
46%
13%
Transparency
0.64
0.49
0.50
0.52
0.51
0.49
0.48
0.50
0.52
0.51
0.48
0.49
0.48
Seeing
1.00
1.00
0.96
0.95
0.94
0.96
0.97
0.95
0.94
0.92
0.95
0.90
0.88
Moon clear
0%
down
down
down
down
down
down
down
down
down
down
down
down
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did
18 Clouded out · 0/100
Starting from
100
Cloud
−64
Transparency
−5
Seeing
−0
Moonlight
−0
Darkness
−31
Score
0
CLOUD 99% LOW 0% MID 23% HIGH 99% SUN 1.5° MOON 5.8° / 0% WIND 2 TEMP 22°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
Why thin high cloud ruins long exposures

Cirrus you can barely see will halo your bright stars, lift your background and vary between frames. Visual observers shrug it off. Long exposures integrate it, so it accumulates.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 20:30 · OBSERVE 21:00–05:00 · 8H · MEAN 50

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

18202200020406
CLOUD RETURNS 05:00
SET UP 19:30 · OBSERVE 20:00–06:00 · 10H · MEAN 54

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

18202200020406
ASTRONOMICAL DARK FROM 20:00TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 47

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

18202200020406
CLOUD RETURNS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 53

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

18202200020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 05:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 53

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

18202200020406
CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
69
Good
MOON 0%
21:00–05:00
Tomorrow · 13 Aug
56
Good
MOON 3%
03:00–05:00
Friday · 14 Aug
41
Fair
MOON 7%
00:00–02:00
Saturday · 15 Aug
16
Poor
MOON 15%
Sunday · 16 Aug
8
Clouded out
MOON 23%
Monday · 17 Aug
4
Clouded out
MOON 32%
Tuesday · 18 Aug
26
Poor
MOON 42%
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About this forecast

Conditions for Barbosa, Colombia are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →