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El Wak

2.809° N   40.929° E  ·  384 M
85 /100
PEAK
A genuinely good night — 9 hours of clear, dark sky from 21:00.
BEST WINDOW 21:00–06:00 · ASTRO DARK 21:00–06:00 · MOON 0%
Transparency
1.00
Seeing
0.83
Cloud
18%
Moon
0%

Excellent tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
06
49
85
70
66
65
46
36
35
35
0
BEST WINDOW
Low cloud
0%
0%
0%
2%
2%
0%
0%
0%
0%
1%
Mid cloud
0%
0%
9%
2%
0%
0%
0%
0%
0%
0%
High cloud
88%
20%
18%
16%
19%
73%
95%
98%
99%
98%
Transparency
1.00
1.00
0.99
0.75
0.71
0.71
0.70
0.70
0.65
0.60
Seeing
0.78
0.83
0.40
0.35
0.31
0.45
0.48
0.49
0.53
0.58
Moon clear
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
21 Fair · 49/100
Starting from
100
Cloud
−48
Transparency
−0
Seeing
−3
Moonlight
−0
Darkness
−0
Score
49
CLOUD 88% LOW 0% MID 0% HIGH 88% SUN -37.0° MOON -35.2° / 0% WIND 4 TEMP 29°
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 21:00–04:00 · 7H · MEAN 62

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

2123010305
SET UP 20:30 · OBSERVE 21:00–03:00 · 6H · MEAN 55

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

2123010305
CLOUD RETURNS 03:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 20:30 · OBSERVE 21:00–03:00 · 6H · MEAN 63

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

2123010305
CLOUD RETURNS 03:00
SET UP 21:30 · OBSERVE 22:00–02:00 · 4H · MEAN 66

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

2123010305
HIGH CLOUD CLEARS 22:00CLOUD RETURNS 02:00
SET UP 20:30 · OBSERVE 21:00–03:00 · 6H · MEAN 67

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

2123010305
CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
85
Excellent
MOON 0%
21:00–06:00
Tomorrow · 13 Aug
70
Good
MOON 2%
20:00–06:00
Friday · 14 Aug
85
Excellent
MOON 6%
20:00–06:00
Saturday · 15 Aug
86
Excellent
MOON 13%
21:00–22:00
Sunday · 16 Aug
53
Fair
MOON 21%
21:00–22:00
Monday · 17 Aug
62
Good
MOON 30%
21:00–22:00
Tuesday · 18 Aug
59
Good
MOON 39%
03:00–04:00
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Nearby locations

About this forecast

Conditions for El Wak, Kenya 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 →