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Vélingara

13.150° N   14.117° W  ·  50 M
53 /100
PEAK
Marginal, but there is a 6 hours gap from 21:00.
BEST WINDOW 21:00–03:00 · ASTRO DARK 21:00–06:00 · MOON 0%
Transparency
0.33
Seeing
0.95
Cloud
37%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
19
20
21
22
23
00
01
02
03
04
05
06
07
0
19
45
36
37
41
53
38
34
38
29
14
0
BEST WINDOW
Low cloud
13%
0%
0%
19%
7%
7%
0%
6%
10%
1%
6%
1%
0%
Mid cloud
6%
9%
1%
0%
0%
1%
1%
1%
5%
2%
4%
0%
0%
High cloud
62%
31%
62%
65%
76%
62%
37%
72%
75%
74%
97%
92%
90%
Transparency
0.40
0.33
0.29
0.27
0.26
0.24
0.23
0.22
0.21
0.21
0.21
0.20
0.21
Seeing
0.53
0.92
0.83
0.84
0.92
0.86
0.84
0.92
0.90
0.91
0.94
0.95
0.95
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
19 Clouded out · 0/100
Starting from
100
Cloud
−45
Transparency
−13
Seeing
−5
Moonlight
−0
Darkness
−37
Score
0
CLOUD 67% LOW 13% MID 6% HIGH 62% SUN 3.8° MOON 6.2° / 0% WIND 7 TEMP 26°
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
When a clear gap is worth driving for

Ask how long the gap is relative to your setup time and your exposure length. A two-hour gap is a real session for a visual observer and close to worthless for someone doing four-minute subs on a target that needs three hours.

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 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 41

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

19212301030507
SET UP 19:30 · OBSERVE 20:00–05:00 · 9H · MEAN 46

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

19212301030507
HIGH CLOUD CLEARS 20:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 45

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

19212301030507
HIGH CLOUD CLEARS 01:00CLOUD RETURNS 02:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 23:30 · OBSERVE 00:00–02:00 · 2H · MEAN 46

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

19212301030507
CLOUD RETURNS 02:00
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The next week of nights

Tonight · 12 Aug
53
Fair
MOON 0%
21:00–03:00
Tomorrow · 13 Aug
62
Good
MOON 2%
00:00–06:00
Friday · 14 Aug
64
Good
MOON 6%
21:00–06:00
Saturday · 15 Aug
26
Poor
MOON 13%
Sunday · 16 Aug
27
Poor
MOON 21%
Monday · 17 Aug
22
Poor
MOON 30%
Tuesday · 18 Aug
30
Poor
MOON 39%
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Nearby locations

About this forecast

Conditions for Vélingara, Senegal 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 →