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Tulu Bolo

8.667° N   38.217° E  ·  2172 M
40 /100
PEAK
Marginal, but there is a 4 hours gap from 22:00.
BEST WINDOW 22:00–02:00 · ASTRO DARK 21:00–06:00 · MOON 0%
Transparency
0.23
Seeing
1.00
Cloud
56%
Moon
0%

Fair tonight

Hour by hour, local to Tulu Bolo. 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
28
35
37
40
35
32
25
12
4
0
BEST WINDOW
Low cloud
3%
7%
4%
5%
5%
5%
6%
0%
0%
0%
Mid cloud
36%
5%
5%
14%
19%
11%
33%
72%
100%
99%
High cloud
64%
75%
71%
48%
59%
77%
73%
91%
67%
20%
Transparency
0.23
0.23
0.22
0.21
0.21
0.19
0.17
0.17
0.19
0.21
Seeing
0.84
0.90
0.85
0.86
0.94
1.00
1.00
1.00
1.00
1.00
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 Poor · 28/100
Starting from
100
Cloud
−58
Transparency
−13
Seeing
−1
Moonlight
−0
Darkness
−0
Score
28
CLOUD 77% LOW 3% MID 36% HIGH 64% SUN -32.3° MOON -30.4° / 0% WIND 4 TEMP 15°
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 23:00–01:00 · 2H · MEAN 37

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

2123010305
SET UP 21:30 · OBSERVE 22:00–03:00 · 5H · MEAN 42

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

2123010305
MOONLIGHT 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 56%
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 56%
SET UP 23:30 · OBSERVE 00:00–01:00 · 1H · MEAN 38

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

2123010305
HIGH CLOUD CLEARS 00:00
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The next week of nights

Tonight · 12 Aug
40
Fair
MOON 0%
22:00–02:00
Tomorrow · 13 Aug
42
Fair
MOON 2%
01:00–03:00
Friday · 14 Aug
43
Fair
MOON 6%
22:00–00:00
Saturday · 15 Aug
37
Fair
MOON 13%
21:00–22:00
Sunday · 16 Aug
56
Good
MOON 21%
21:00–22:00
Monday · 17 Aug
63
Good
MOON 30%
21:00–22:00
Tuesday · 18 Aug
55
Good
MOON 39%
21:00–22:00
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Nearby locations

About this forecast

Conditions for Tulu Bolo, Ethiopia 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 →