Terrace
Tonight’s hourly cloud, moonlight and observing conditions.
Change place
Why this matters
91% low cloud at the best hour. Low cloud is opaque — it gates everything else. Read the guide →
Also limiting: Transparency. See the guide →
Site details and actions
The score describes tonight’s conditions. Site darkness helps you choose what to observe.
Tonight in context · local sky & season
November historically: 1.2 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 →
The night, hour by hour
Colour = score · Luminance = everything else| Score | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|
| Hour | ||||||||||
| Cloud % | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Transp. 0–1 | 0.15 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -12 | -6 | 2 | 10 | 18 | 26 | 34 | 40 | 44 | 45 |
| Darkness | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Twil. | Twil. | Day |
Inspect all cloud layers and score factors
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
The sky is staying closed.
None of the five observing modes reaches a reliable setup window. Skip the empty charts and use tonight to make the next clear session easier.
Three useful moves, no dead chart.
The forecast detail above remains available when you need the measurements. These are the useful next decisions.
Your target still carries into clear-night recommendations and future alert rules.
Deep-sky visual is your current default.
Jasper National Park
716 km away · Threatened dark sky · 21.7–21.8 mag/arcsec²
The next week of nights
Tonight
2 Nov1Moon 32%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|
| Hour | ||||||||||
| Cloud % | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Transp. 0–1 | 0.15 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -12 | -6 | 2 | 10 | 18 | 26 | 34 | 40 | 44 | 45 |
| Darkness | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Twil. | Twil. | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Tomorrow
3 Nov6Moon 24%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 6 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hour | ||||||||||||||||
| Cloud % | 100 | 100 | 97 | 100 | 100 | 100 | 98 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Transp. 0–1 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.23 | 0.21 | 0.22 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -15 | -21 | -26 | -28 | -29 | -27 | -23 | -17 | -10 | -1 | 6 | 15 | 22 | 29 | 35 | 38 |
| Darkness | Twil. | Twil. | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Twil. | Twil. | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Wednesday
4 Nov30Moon 15%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 30 | 14 | 9 | 2 | 5 | 9 | 9 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hour | ||||||||||||||||
| Cloud % | 100 | 100 | 100 | 100 | 100 | 100 | 91 | 53 | 77 | 83 | 91 | 87 | 82 | 82 | 79 | 89 |
| Transp. 0–1 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.23 | 0.25 | 0.26 | 0.27 | 0.10 | 0.10 | 0.24 | 0.25 | 0.28 | 0.30 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.96 | 0.99 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -15 | -22 | -28 | -33 | -35 | -35 | -32 | -27 | -21 | -13 | -5 | 3 | 11 | 18 | 25 | 29 |
| Darkness | Twil. | Twil. | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Dark | Twil. | Twil. | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Thursday
5 Nov2Moon 7%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 0 | 2 | 0 |
|---|---|---|---|---|
| Hour | ||||
| Cloud % | 100 | 100 | 99 | 67 |
| Transp. 0–1 | 0.24 | 0.19 | 0.25 | 0.22 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -5 | -42 | -9 | 26 |
| Darkness | Day | Dark | Dark | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Friday
6 Nov15Moon 3%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 15 | 0 | 0 |
|---|---|---|---|---|
| Hour | ||||
| Cloud % | 64 | 79 | 100 | 100 |
| Transp. 0–1 | 0.18 | 0.29 | 0.29 | 0.20 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -3 | -47 | -19 | 19 |
| Darkness | Day | Dark | Dark | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Saturday
7 Nov11Moon 1%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 0 | 11 | 0 |
|---|---|---|---|---|
| Hour | ||||
| Cloud % | 100 | 100 | 97 | 95 |
| Transp. 0–1 | 0.10 | 0.10 | 0.18 | 0.35 |
| Seeing est. /1 | 1.00 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | -1 | -49 | -30 | 12 |
| Darkness | Day | Dark | Dark | Day |
All factors for this night
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Sunday
8 Nov17Moon 0%Cloud or fog is the strongest score limit at the best sampled time. ↓
| Score | 0 | 17 | 0 | 0 |
|---|---|---|---|---|
| Hour | ||||
| Cloud % | 92 | 88 | 100 | 100 |
| Transp. 0–1 | 0.25 | 0.27 | 0.20 | 0.24 |
| Seeing est. /1 | 0.99 | 1.00 | 1.00 | 1.00 |
| Moon alt. ° | 0 | -48 | -40 | 5 |
| Darkness | Day | Dark | Dark | Day |
All factors for this night
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.
Sources and scoring details openclose
Conditions for Terrace, British Columbia, 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.