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Home › Locations › Corner Brook
Tonight · Tue, 3 November 2026

Corner Brook

Tonight’s hourly cloud, moonlight and observing conditions.

48.950°N 57.952°W ·17 m ·Newfoundland and Labrador, Canada
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Tonight · peak score /100
76Excellent
04:30–06:30
best window
Limited by
Transparency
Why this matters

Transparency 0.66 — haze and water vapour will cost you the faintest targets. Read the guide →

Site details and actions
Site darkness · peer measure
Brightened skyNot multiplied into the conditions score
20.1–20.7 mag/arcsec²

The score describes tonight’s conditions. Site darkness helps you choose what to observe.

See target outlook ↓Planet observing times →
Best months at Corner Brook, Newfoundland and Labrador →Moonless nights →
Tonight in context · local sky & season

November historically: 0.7 qualifying nights/month on average (2005–2024). Regional cloud and darkness history, not tonight’s probability or a comparison with the conditions score.

A qualifying historical night has at least 3 hours of astronomical darkness and mean nighttime cloud ≤30%. This does not measure steady air or target visibility. Seasonal history →

Saturn: about 7.3h above 20° during this observing night’s darkness. Longest sampled dark-time opportunity among our four planet targets; not a weather ranking. Planet times →

Position calculations use roughly 20-minute samples. Clouds, skyglow and local obstructions still matter. Milky Way timing →

Best window
04:30 – 06:30
Window quality
74 / 100 avg
Astronomical dark
04:30 – 05:30
Moon
Waning crescent, 32%
Transparency at peak
0.66
Seeing at peak (est.)
0.65
Visual limit (modelled)
4.5–6.0 mag

The night, hour by hour

Colour = score · Luminance = everything else
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
76
71
7
0
Hour
Cloud %001910
Transp. 0–10.660.690.660.58
Seeing est. /10.650.690.610.62
Moon alt. °36445052
DarknessDarkTwil.Twil.Day
Inspect all cloud layers and score factors
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
76
71
7
Score
BEST WINDOW · 3 H
Low cloud
0%
0%
19%
10%
Mid cloud
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
Transparency
0.66
0.69
0.66
0.58
Seeing
0.65
0.69
0.61
0.62
Moon clear
34%
34%
33%
33%
04
05
06
07
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Score inspectorWhy this hour scored what it did Open peakClose
04 Excellent · 76/100
Starting from
100
Cloud
−0
Transparency
−13
Seeing
−8
Moonlight
−3
Darkness
−0
Score
76
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN -26.9° MOON 36.4° / 34% WIND 6 TEMP 0°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What can you actually do tonight?

This is GoodSeeing’s decision layer: the same forecast is weighted for your target and site darkness. Planetary work barely cares about moonlight; long exposures can fail on high cloud a visual observer would barely notice. Your choice is remembered on this device and becomes the default for new alert rules.

NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

0406
SITE GLOW LIMITS THIS TARGET
SET UP 04:00 · OBSERVE 04:30–07:30 · 3H · MEAN 63

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

0406
TWILIGHT BEGINS 07:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 45

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

0406
CLOUD RETURNS 06:30SITE GLOW LIMITS FAINT TARGETS
SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 46

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

0406
CLOUD RETURNS 06:30
SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 40

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

0406
CLOUD RETURNS 06:30SITE GLOW LIMITS FAINT TARGETS

Deep-sky visual is your current default.

A darker option

Katahdin Woods and Waters

869 km away · Natural-dark sky · 21.8–21.9 mag/arcsec²

13conditions tonight
See the trade-off →

The next week of nights

Tonight
2 Nov76Moon 33%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
54
76
71
7
0
Hour
Cloud %20001910
Transp. 0–10.490.660.690.660.58
Seeing est. /10.620.650.690.610.62
Moon alt. °2836445052
DarknessDarkDarkTwil.Twil.Day
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
54
76
71
7
Score
Low cloud
17%
0%
0%
19%
10%
Mid cloud
8%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
Transparency
0.49
0.66
0.69
0.66
0.58
Seeing
0.62
0.65
0.69
0.61
0.62
Moon clear
35%
34%
34%
33%
33%
03
04
05
06
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tomorrow
3 Nov24Moon 26%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
2
5
8
9
10
21
20
16
17
22
24
3
0
Hour
Cloud %10010098938887867071819198100100100
Transp. 0–10.500.440.380.330.290.270.280.280.270.290.290.250.210.180.15
Seeing est. /10.820.850.880.920.950.940.930.940.910.910.930.940.960.981.00
Moon alt. °-23-29-32-33-31-26-20-12-361524333944
DarknessTwil.Twil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.Day
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
2
5
8
9
10
21
20
16
17
22
24
3
Score
Low cloud
100%
100%
98%
93%
88%
87%
86%
70%
71%
73%
57%
31%
16%
9%
3%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
31%
81%
98%
100%
100%
100%
Transparency
0.50
0.44
0.38
0.33
0.29
0.27
0.28
0.28
0.27
0.29
0.29
0.25
0.21
0.18
0.15
Seeing
0.82
0.85
0.88
0.92
0.95
0.94
0.93
0.94
0.91
0.91
0.93
0.94
0.96
0.98
1.00
Moon clear
down
down
down
down
down
down
down
down
down
25%
24%
24%
23%
23%
23%
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Wednesday
4 Nov66Moon 16%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
55
66
57
59
62
61
59
59
52
35
19
14
3
0
Hour
Cloud %1011592367256889988472
Transp. 0–10.310.250.190.170.150.130.110.100.100.100.100.100.100.120.10
Seeing est. /10.970.930.930.930.890.900.880.890.890.870.870.870.840.820.81
Moon alt. °-23-31-36-39-39-36-31-24-15-6312212935
DarknessTwil.Twil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.Day
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
55
66
57
59
62
61
59
59
52
35
19
14
3
Score
Low cloud
0%
0%
0%
0%
1%
2%
2%
1%
3%
6%
15%
42%
48%
43%
48%
Mid cloud
1%
0%
1%
15%
8%
0%
2%
6%
2%
1%
1%
6%
2%
3%
4%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
2%
20%
62%
81%
97%
73%
45%
Transparency
0.31
0.25
0.19
0.17
0.15
0.13
0.11
0.10
0.10
0.10
0.10
0.10
0.10
0.12
0.10
Seeing
0.97
0.93
0.93
0.93
0.89
0.90
0.88
0.89
0.89
0.87
0.87
0.87
0.84
0.82
0.81
Moon clear
down
down
down
down
down
down
down
down
down
down
15%
15%
15%
15%
14%
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Thursday
5 Nov6Moon 11%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
0
6
0
Hour
Cloud %1001001001001009998
Transp. 0–10.270.250.220.190.180.120.10
Seeing est. /10.650.610.570.570.590.710.91
Moon alt. °-12-22-31-38-44-1830
DarknessDayTwil.Twil.DarkDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
6
Score
Low cloud
99%
98%
97%
99%
100%
51%
98%
Mid cloud
85%
46%
85%
99%
96%
66%
9%
High cloud
99%
98%
98%
95%
92%
97%
0%
Transparency
0.27
0.25
0.22
0.19
0.18
0.12
0.10
Seeing
0.65
0.61
0.57
0.57
0.59
0.71
0.91
Moon clear
down
down
down
down
down
down
7%
16
17
18
19
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Friday
6 Nov0Moon 4%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
Hour
Cloud %100100100100
Transp. 0–10.130.100.100.10
Seeing est. /10.931.000.840.79
Moon alt. °9-45-2921
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
100%
100%
100%
100%
Mid cloud
12%
13%
0%
97%
High cloud
21%
95%
98%
90%
Transparency
0.13
0.10
0.10
0.10
Seeing
0.93
1.00
0.84
0.79
Moon clear
6%
down
down
3%
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Saturday
7 Nov0Moon 1%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
Hour
Cloud %100100100100
Transp. 0–10.100.100.100.10
Seeing est. /10.750.740.720.80
Moon alt. °11-44-4012
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
84%
100%
97%
100%
Mid cloud
100%
100%
100%
20%
High cloud
88%
98%
100%
100%
Transparency
0.10
0.10
0.10
0.10
Seeing
0.75
0.74
0.72
0.80
Moon clear
2%
down
down
1%
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Sunday
8 Nov0Moon 0%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
Hour
Cloud %10010010099
Transp. 0–10.120.100.100.10
Seeing est. /10.780.800.720.92
Moon alt. °12-41-503
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
100%
100%
100%
98%
Mid cloud
11%
1%
98%
38%
High cloud
98%
100%
100%
0%
Transparency
0.12
0.10
0.10
0.10
Seeing
0.78
0.80
0.72
0.92
Moon clear
0%
down
down
0%
14
20
02
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tap a night for its hours. Later forecasts may have wider time steps; missing hours are not interpolated.

Planning a trip?

Compare the next eight weekends → · Best months to visit → · Moonless nights →

About this forecast

Exact-coordinate weather, sky geometry and site context.

Full method →20-year baseline →
Sources and scoring details openclose

Conditions for Corner Brook, Newfoundland and Labrador, Canada 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 astronomical twilight. Site darkness is shown separately, then used only where artificial skyglow physically changes moon contrast, haze scattering, visual limits and target suitability.