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Jizan

16.889° N   42.551° E  ·  19 M
40 /100
PEAK
Marginal, but there is a 1 hour gap from 02:00.
BEST WINDOW 02:00–03:00 · ASTRO DARK 21:00–05:00 · MOON 0%
Transparency
0.75
Seeing
0.88
Cloud
71%
Moon
0%

Fair tonight

Hour by hour, local to Jizan. 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
7
8
16
5
25
40
8
34
16
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
89%
86%
60%
95%
38%
20%
91%
20%
36%
18%
High cloud
100%
100%
100%
100%
94%
63%
63%
65%
82%
31%
Transparency
0.75
0.71
0.66
0.61
0.56
0.52
0.49
0.20
0.47
0.50
Seeing
0.59
0.68
0.67
0.81
0.88
0.76
0.69
0.80
0.84
0.84
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 Clouded out · 7/100
Starting from
100
Cloud
−91
Transparency
−1
Seeing
−1
Moonlight
−0
Darkness
−0
Score
7
CLOUD 100% LOW 0% MID 89% HIGH 100% SUN -32.3° MOON -30.5° / 0% WIND 6 TEMP 34°
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 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 39

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

2123010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 41

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

2123010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 03:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

2123010305
CLOUD NEVER DROPS BELOW 43%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

2123010305
CLOUD NEVER DROPS BELOW 43%
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 36

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

2123010305
HIGH CLOUD CLEARS 02:00CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
40
Fair
MOON 0%
02:00–03:00
Tomorrow · 13 Aug
76
Excellent
MOON 2%
01:00–05:00
Friday · 14 Aug
71
Good
MOON 6%
21:00–05:00
Saturday · 15 Aug
54
Fair
MOON 13%
21:00–22:00
Sunday · 16 Aug
63
Good
MOON 21%
21:00–22:00
Monday · 17 Aug
82
Excellent
MOON 30%
03:00–04:00
Tuesday · 18 Aug
80
Excellent
MOON 39%
03:00–04:00
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Nearby locations

About this forecast

Conditions for Jizan, Saudi Arabia 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 →