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Kowŏn-ŭp

39.438° N   127.243° E  ·  9 M
60 /100
PEAK
Worth setting up — 1 hour of workable sky from 04:00.
BEST WINDOW 04:00–05:00 · ASTRO DARK 02:00–04:00 · MOON 0%
Transparency
0.39
Seeing
1.00
Cloud
21%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
02
03
04
05
06
8
16
60
5
0
BEST WINDOW
Low cloud
88%
77%
17%
33%
63%
Mid cloud
0%
0%
0%
0%
0%
High cloud
19%
13%
5%
88%
93%
Transparency
0.39
0.39
0.37
0.37
0.39
Seeing
1.00
1.00
1.00
1.00
1.00
Moon clear
down
down
down
down
0%
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
02 Clouded out · 8/100
Starting from
100
Cloud
−89
Transparency
−3
Seeing
−0
Moonlight
−0
Darkness
−0
Score
8
CLOUD 90% LOW 88% MID 0% HIGH 19% SUN -32.2° MOON -31.7° / 0% WIND 2 TEMP 22°
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 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 59

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

020406
CLOUD BREAKS 04:00CLOUD RETURNS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 71

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

020406
CLOUD BREAKS 04:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 56

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

020406
CLOUD BREAKS 04:00CLOUD RETURNS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 45

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

020406
CLOUD BREAKS 04:00CLOUD RETURNS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 60

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

020406
CLOUD BREAKS 04:00CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
60
Good
MOON 0%
04:00–05:00
Tomorrow · 13 Aug
7
Clouded out
MOON 1%
Friday · 14 Aug
31
Poor
MOON 5%
Saturday · 15 Aug
0
Clouded out
MOON 8%
Sunday · 16 Aug
7
Clouded out
MOON 19%
Monday · 17 Aug
62
Good
MOON 28%
21:00–22:00
Tuesday · 18 Aug
46
Fair
MOON 37%
03:00–04:00
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About this forecast

Conditions for Kowŏn-ŭp, North Korea 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 →