Rule
Dark Skies
Björkliden - Dark Skies - Swedish Lapland
Björkliden, Norrbotten, Sweden
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/Stockholm
Next opportunity
Excellent Dark Skies (pristine)
Björkliden
Tomorrow · 04:00–05:10 · 1h window
Medium confidence
48%
☁️Total Cloud Coverage5.3-5.5%
🌕Moon Illumination59.2%
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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/Stockholm | 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° |
|---|---|---|---|---|---|---|
| Sat, Feb 7 | ||||||
| 19:00 | ✓ | 65% | 6544m | 0% | 68% | -32° |
| 20:00 | ✓ | 66% | 6541m | 0% | 68% | -27° |
| 21:00 | ✓ | 71% | 6499m | 0% | 68% | -22° |
| 22:00 | ✓ | 79% | 6368m | 0% | 68% | -16° |
| 23:00 | ✓ | 76% | 6517m | 0% | 68% | -10° |
| Sun, Feb 8 | ||||||
| 24:00 | ✓ | 64% | 8410m | 0% | 68% | -4.6° |
| 01:00 | ✓ | 56% | 8910m | 0% | 59% | 0.07° |
| 02:00 | ✓ | 51% | 11030m | 0% | 59% | 3.8° |
| 03:00 | ✓ | 25% | 20839m | 0% | 59% | 6.4° |
| 04:00 | ✓ | 5.5% | 23785m | 0% | 59% | 7.6° |
| 05:00 | ✓ | 5.3% | 24134m | 0% | 59% | 7.3° |
| 06:00 | ✕ | 5% | 24134m | 0% | 59% | 5.6° |
| 07:00 | ✕ | 5% | 24134m | 0% | 59% | 2.5° |
| 08:00 | ✕ | 5% | 24135m | 0% | 59% | -1.7° |
| 09:00 | ✕ | 6% | 24135m | 0% | 59% | -6.8° |
| 10:00 | ✕ | 5% | 24134m | 0% | 59% | -13° |
| 11:00 | ✕ | 71% | 24134m | 0% | 59% | -19° |
| 12:00 | ✕ | 100% | 24134m | 0% | 59% | -25° |
| 13:00 | ✕ | 100% | 24134m | 0% | 59% | -31° |
| 14:00 | ✕ | 100% | 22424m | 0% | 59% | -36° |
| 15:00 | ✕ | 100% | 24134m | 0% | 59% | -40° |
| 16:00 | ✕ | 100% | 23031m | 0% | 59% | -43° |
| 17:00 | ✕ | 100% | 24134m | 0% | 59% | -44° |
| 18:00 | ✓ | 100% | 24135m | 0% | 59% | -43° |
| 19:00 | ✓ | 100% | 24135m | 0% | 59% | -40° |
| 20:00 | ✓ | 100% | 24134m | 0% | 59% | -35° |
| 21:00 | ✓ | 100% | 24135m | 0% | 59% | -30° |
| 22:00 | ✓ | 100% | 24135m | 0% | 59% | -24° |
| 23:00 | ✓ | 100% | 24135m | 0% | 59% | -18° |
| Mon, Feb 9 | ||||||
| 24:00 | ✓ | 100% | 24135m | 0% | 59% | -13° |
| 01:00 | ✓ | 100% | 24135m | 0% | 50% | -7.6° |
| 02:00 | ✓ | 100% | 24134m | 0% | 50% | -3.2° |
| 03:00 | ✓ | 100% | 24135m | 0% | 50% | 0.18° |
| 04:00 | ✓ | 100% | 24135m | 0% | 50% | 2.4° |
| 05:00 | ✓ | 100% | 24134m | 0% | 50% | 3.2° |
| 06:00 | ✕ | 100% | 24134m | 0% | 50% | 2.6° |
| 07:00 | ✕ | 100% | 24135m | 0% | 50% | 0.6° |
| 08:00 | ✕ | 100% | 24134m | 13% | 50% | -2.7° |
| 09:00 | ✕ | 100% | 24135m | 26% | 50% | -7° |
| 10:00 | ✕ | 100% | 24134m | 39% | 50% | -12° |
| 11:00 | ✕ | 61% | 24134m | 42% | 50% | -18° |
| 12:00 | ✕ | 70% | 24135m | 46% | 50% | -24° |
| 13:00 | ✕ | 81% | 24134m | 49% | 50% | -30° |
| 14:00 | ✕ | 83% | 24134m | 42% | 50% | -36° |
| 15:00 | ✕ | 90% | 24134m | 35% | 50% | -41° |
| 16:00 | ✕ | 97% | 24134m | 28% | 50% | -45° |
| 17:00 | ✕ | 100% | 24135m | 28% | 50% | -47° |
| 18:00 | ✓ | 100% | 24134m | 28% | 50% | -48° |
| 19:00 | ✓ | 100% | 24134m | 28% | 50% | -46° |
| 20:00 | ✓ | 100% | 24134m | 26% | 50% | -43° |
| 21:00 | ✓ | 100% | 17105m | 24% | 50% | -38° |
| 22:00 | ✓ | 100% | 9654m | 22% | 50% | -32° |
| 23:00 | ✓ | 100% | 683m | 31% | 50% | -26° |
| Tue, Feb 10 | ||||||
| 24:00 | ✓ | 100% | 148m | 41% | 50% | -21° |
| 01:00 | ✓ | 100% | 150m | 50% | 40% | -15° |
| 02:00 | ✓ | 100% | 376m | 33% | 40% | -10° |
| 03:00 | ✓ | 100% | 602m | 17% | 40% | -5.9° |
| 04:00 | ✓ | 100% | 828m | 0% | 40% | -2.8° |
| 05:00 | ✓ | 100% | 8444m | 17% | 40% | -0.87° |
| 06:00 | ✕ | 100% | 16059m | 33% | 40% | -0.34° |
| 07:00 | ✕ | 100% | 23675m | 50% | 40% | -1.2° |
| 08:00 | ✕ | 96% | 17966m | 46% | 40% | -3.3° |
| 09:00 | ✕ | 93% | 12257m | 43% | 40% | -6.7° |
| 10:00 | ✕ | 89% | 6548m | 39% | 40% | -11° |
| 11:00 | ✕ | 77% | 12410m | 43% | 40% | -16° |
| 12:00 | ✕ | 64% | 18273m | 46% | 40% | -22° |
| 13:00 | ✕ | 51% | 24135m | 50% | 40% | -28° |
| 14:00 | ✕ | 49% | 18911m | 46% | 40% | -34° |
| 15:00 | ✕ | 47% | 13687m | 43% | 40% | -40° |
| 16:00 | ✕ | 45% | 8462m | 39% | 40% | -45° |
| 17:00 | ✕ | 55% | 7824m | 43% | 40% | -49° |
| 18:00 | ✓ | 64% | 7185m | 46% | 40% | -51° |
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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