Rule
Dark Skies
Alta - Dark Skies - Norwegian Fjords
Alta, Finnmark, Norway
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/Oslo
Next opportunity
Good Dark Skies
Alta
Today · 23:00–24:00 · 1h window
Medium confidence
65%
🌛Moon Altitude-29.6°
☁️Total Cloud Coverage18.8%
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72-hour requirements breakdown
What passed or failed, hour by hourOR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Europe/Oslo | Astronomical Night Any | Total Cloud Coverage ≤ 20.0% | Visibility ≥ 12000.0m | Precipitation Chance ≤ 10.0% | Moon Illumination OR1·B1≤ 35.0% | Moon Altitude OR1·B2≤ 10.0° |
|---|---|---|---|---|---|---|
| Mon, Feb 16 | ||||||
| 14:00 | ✕ | 100% | 24134m | 30% | 1.2% | -3.4° |
| 15:00 | ✕ | 100% | 24135m | 22% | 1.2% | -7° |
| 16:00 | ✕ | 100% | 24135m | 13% | 1.2% | -11° |
| 17:00 | ✕ | 100% | 13056m | 22% | 1.2% | -16° |
| 18:00 | ✓ | 100% | 8353m | 30% | 1.2% | -21° |
| 19:00 | ✓ | 99% | 3053m | 39% | 1.2% | -25° |
| 20:00 | ✓ | 100% | 1888m | 29% | 1.2% | -29° |
| 21:00 | ✓ | 97% | 3588m | 22% | 1.2% | -33° |
| 22:00 | ✓ | 100% | 5840m | 13% | 1.2% | -35° |
| 23:00 | ✓ | 100% | 3913m | 8.8% | 1.2% | -36° |
| Tue, Feb 17 | ||||||
| 24:00 | ✓ | 100% | 3943m | 4.4% | 1.2% | -35° |
| 01:00 | ✕ | 100% | 5657m | 0% | 0% | -33° |
| 02:00 | ✕ | 100% | 2968m | 26% | 0% | -30° |
| 03:00 | ✕ | 100% | 2057m | 13% | 0% | -26° |
| 04:00 | ✕ | 100% | 1786m | 0% | 0% | -21° |
| 05:00 | ✕ | 100% | 2221m | 0% | 0% | -16° |
| 06:00 | ✕ | 100% | 2550m | 0% | 0% | -11° |
| 07:00 | ✕ | 100% | 3791m | 0% | 0% | -6° |
| 08:00 | ✕ | 100% | 3792m | 0% | 0% | -1.5° |
| 09:00 | ✕ | 100% | 4038m | 0% | 0% | 2.1° |
| 10:00 | ✕ | 100% | 9815m | 0% | 0% | 4.9° |
| 11:00 | ✕ | 69% | 22961m | 0% | 0% | 6.5° |
| 12:00 | ✕ | 70% | 24134m | 0% | 0% | 7° |
| 13:00 | ✕ | 70% | 24135m | 0% | 0% | 6.2° |
| 14:00 | ✕ | 69% | 24098m | 0% | 0% | 4.2° |
| 15:00 | ✕ | 69% | 24135m | 0% | 0% | 1.2° |
| 16:00 | ✕ | 68% | 24135m | 0% | 0% | -2.5° |
| 17:00 | ✕ | 73% | 24134m | 0% | 0% | -6.9° |
| 18:00 | ✕ | 34% | 24135m | 0% | 0% | -12° |
| 19:00 | ✓ | 24% | 21516m | 0% | 0% | -16° |
| 20:00 | ✓ | 100% | 21196m | 0% | 0% | -21° |
| 21:00 | ✓ | 26% | 24116m | 0% | 0% | -25° |
| 22:00 | ✓ | 45% | 24134m | 0% | 0% | -28° |
| 23:00 | ✓ | 19% | 24134m | 0% | 0% | -30° |
| Wed, Feb 18 | ||||||
| 24:00 | ✓ | 22% | 24134m | 0% | 0% | -30° |
| 01:00 | ✓ | 46% | 17463m | 0% | 1.2% | -29° |
| 02:00 | ✓ | 61% | 17060m | 0% | 1.2% | -27° |
| 03:00 | ✓ | 70% | 11251m | 0% | 1.2% | -24° |
| 04:00 | ✓ | 71% | 8490m | 0% | 1.2% | -19° |
| 05:00 | ✕ | 77% | 7534m | 0% | 1.2% | -14° |
| 06:00 | ✕ | 78% | 6822m | 0% | 1.2% | -9.2° |
| 07:00 | ✕ | 82% | 5719m | 0% | 1.2% | -4° |
| 08:00 | ✕ | 81% | 4381m | 0% | 1.2% | 0.88° |
| 09:00 | ✕ | 82% | 3862m | 0% | 1.2% | 5.3° |
| 10:00 | ✕ | 71% | 5037m | 0% | 1.2% | 8.9° |
| 11:00 | ✕ | 70% | 10555m | 0% | 1.2% | 11° |
| 12:00 | ✕ | 69% | 16397m | 0% | 1.2% | 13° |
| 13:00 | ✕ | 61% | 23004m | 0% | 1.2% | 13° |
| 14:00 | ✕ | 59% | 24134m | 0% | 1.2% | 12° |
| 15:00 | ✕ | 55% | 22654m | 0% | 1.2% | 9.7° |
| 16:00 | ✕ | 66% | 13541m | 0% | 1.2% | 6.4° |
| 17:00 | ✕ | 69% | 8996m | 13% | 1.2% | 2.4° |
| 18:00 | ✕ | 82% | 5326m | 26% | 1.2% | -2.1° |
| 19:00 | ✓ | 88% | 3208m | 39% | 1.2% | -6.8° |
| 20:00 | ✓ | 89% | 1272m | 26% | 1.2% | -11° |
| 21:00 | ✓ | 92% | 1248m | 13% | 1.2% | -16° |
| 22:00 | ✓ | 93% | 1426m | 0% | 1.2% | -19° |
| 23:00 | ✓ | 90% | 3671m | 13% | 1.2% | -22° |
| Thu, Feb 19 | ||||||
| 24:00 | ✓ | 90% | 5615m | 26% | 1.2% | -23° |
| 01:00 | ✓ | 92% | 2724m | 39% | 4.5% | -24° |
| 02:00 | ✓ | 90% | 2981m | 26% | 4.5% | -22° |
| 03:00 | ✓ | 85% | 4352m | 13% | 4.5% | -20° |
| 04:00 | ✓ | 64% | 6844m | 0% | 4.5% | -16° |
| 05:00 | ✕ | 60% | 9487m | 0% | 4.5% | -12° |
| 06:00 | ✕ | 54% | 7676m | 0% | 4.5% | -7° |
| 07:00 | ✕ | 56% | 11007m | 0% | 4.5% | -1.8° |
| 08:00 | ✕ | 57% | 16082m | 0% | 4.5% | 3.4° |
| 09:00 | ✕ | 72% | 17099m | 0% | 4.5% | 8.3° |
| 10:00 | ✕ | 98% | 2351m | 0% | 4.5% | 13° |
| 11:00 | ✕ | 98% | 2481m | 0% | 4.5% | 16° |
| 12:00 | ✕ | 96% | 7552m | 0% | 4.5% | 18° |
| 13:00 | ✕ | 96% | 10313m | 0% | 4.5% | 20° |
| 14:00 | ✕ | 96% | 5056m | 0% | 4.5% | 20° |
| 15:00 | ✕ | 93% | 2104m | 0% | 4.5% | 18° |
| 16:00 | ✕ | 96% | 2956m | 0% | 4.5% | 15° |
| 17:00 | ✕ | 100% | 2460m | 0% | 4.5% | 12° |
| 18:00 | ✕ | 97% | 3988m | 0% | 4.5% | 7.7° |
| 19:00 | ✓ | 99% | 11889m | 0% | 4.5% | 3.1° |
| 20:00 | ✓ | 89% | 15333m | 0% | 4.5% | -1.6° |
| 21:00 | ✓ | 79% | 18777m | 0% | 4.5% | -6.2° |
| 22:00 | ✓ | 69% | 22222m | 0% | 4.5% | -10° |
| 23:00 | ✓ | 62% | 22710m | 0% | 4.5% | -13° |
| Fri, Feb 20 | ||||||
| 24:00 | ✓ | 55% | 23199m | 0% | 4.5% | -16° |
| 01:00 | ✓ | 48% | 23687m | 0% | 10% | -17° |
| 02:00 | ✓ | 44% | 21109m | 0% | 10% | -17° |
| 03:00 | ✓ | 40% | 18532m | 0% | 10% | -15° |
| 04:00 | ✓ | 36% | 15954m | 0% | 10% | -13° |
| 05:00 | ✕ | 33% | 18338m | 0% | 10% | -8.9° |
| 06:00 | ✕ | 30% | 20722m | 0% | 10% | -4.4° |
| 07:00 | ✕ | 27% | 23106m | 0% | 10% | 0.54° |
| 08:00 | ✕ | 24% | 23411m | 3.3% | 10% | 5.7° |
| 09:00 | ✕ | 21% | 23715m | 6.7% | 10% | 11° |
| 10:00 | ✕ | 18% | 24020m | 10% | 10% | 16° |
| 11:00 | ✕ | 32% | 18818m | 23% | 10% | 20° |
| 12:00 | ✕ | 46% | 13616m | 37% | 10% | 23° |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.
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