GoodSeeing
Home › Locations › Lebanon

Lebanon

36.208° N   86.291° W  ·  161 M
54 /100
PEAK
Marginal, but there is a 4 hours gap from 23:00.
BEST WINDOW 23:00–03:00 · ASTRO DARK 22:00–05:00 · MOON 1%
Transparency
0.30
Seeing
0.83
Cloud
30%
Moon
1%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
06
0
28
31
46
48
54
43
33
38
21
0
BEST WINDOW
Low cloud
0%
1%
0%
2%
1%
2%
0%
1%
2%
0%
0%
Mid cloud
6%
12%
9%
4%
2%
3%
1%
0%
2%
2%
2%
High cloud
63%
73%
91%
54%
49%
27%
63%
91%
77%
74%
86%
Transparency
0.27
0.26
0.29
0.30
0.27
0.26
0.27
0.28
0.28
0.30
0.30
Seeing
0.68
0.80
0.83
0.79
0.81
0.80
0.78
0.76
0.79
0.81
0.80
Moon clear
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
20 Clouded out · 0/100
Starting from
100
Cloud
−38
Transparency
−18
Seeing
−4
Moonlight
−0
Darkness
−40
Score
0
CLOUD 65% LOW 0% MID 6% HIGH 63% SUN -4.7° MOON -0.4° / 0% WIND 5 TEMP 25°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

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 47

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

202200020406
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 03:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 47

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

202200020406
HIGH CLOUD CLEARS 23:00TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–02:00 · 3H · MEAN 42

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

202200020406
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 02:00
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 37

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

202200020406
HIGH CLOUD CLEARS 01:00CLOUD RETURNS 02:00
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 48

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

202200020406
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 03:00
Advertisement
Reserved

The next week of nights

Tonight · 12 Aug
54
Fair
MOON 0%
23:00–03:00
Tomorrow · 13 Aug
79
Excellent
MOON 3%
22:00–05:00
Friday · 14 Aug
91
Excellent
MOON 7%
22:00–02:00
Saturday · 15 Aug
79
Excellent
MOON 15%
01:00–02:00
Sunday · 16 Aug
95
Excellent
MOON 23%
01:00–02:00
Monday · 17 Aug
82
Excellent
MOON 32%
01:00–02:00
Tuesday · 18 Aug
81
Excellent
MOON 42%
01:00–02:00
Advertisement
Reserved

Nearby locations

About this forecast

Conditions for Lebanon, Tennessee, United States 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 →