Rule
Dark Skies
Girdwood - Dark Skies - Alaska
Girdwood, Alaska, United States
Moonless nights with crystal-clear skies for Milky Way shots
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in America/Anchorage
Next opportunity
Dark Skies
Girdwood
Wed, Jan 21 · 02:00–05:00 · 3h window
Low confidence
24%
Dark Skies
Girdwood
Wed, Jan 21 · 08:00–09:00
Low
Dark Skies
Girdwood
Wed, Jan 21 · 09:00–12:00
Low
Dark Skies
Girdwood
Wed, Jan 21 · 12:00–14:00
Low
Dark Skies
Girdwood
Wed, Jan 21 · 21:00–04:00
Low
Dark Skies
Girdwood
Thu, Jan 22 · 09:00–12:00
Low
Dark Skies
Girdwood
Thu, Jan 22 · 12:00–19:00
Low
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 72 hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time America/Anchorage | 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° |
|---|---|---|---|---|---|---|
| Sun, Jan 11 | ||||||
| 08:00 | ✓ | 95% | 200m | 90% | 41% | 12° |
| 09:00 | ✓ | 99% | 200m | 80% | 41% | 10° |
| 10:00 | ✓ | 90% | 140m | 70% | 41% | 6.9° |
| 11:00 | ✓ | 87% | 120m | 60% | 41% | 2° |
| 12:00 | ✓ | 84% | 160m | 53% | 41% | -3.9° |
| 13:00 | ✓ | 98% | 160m | 45% | 41% | -11° |
| 14:00 | ✓ | 95% | 480m | 35% | 41% | -18° |
| 15:00 | ✓ | 100% | 940m | 40% | 33% | -25° |
| 16:00 | ✓ | 100% | 520m | 33% | 33% | -32° |
| 17:00 | ✓ | 100% | 940m | 23% | 33% | -38° |
| 18:00 | ✓ | 100% | 780m | 30% | 33% | -43° |
| 19:00 | ✓ | 100% | 420m | 33% | 33% | -47° |
| 20:00 | ✓ | 93% | 600m | 25% | 33% | -48° |
| 21:00 | ✓ | 90% | 660m | 23% | 33% | -46° |
| 22:00 | ✓ | 90% | 740m | 20% | 33% | -43° |
| 23:00 | ✓ | 91% | 1060m | 20% | 33% | -37° |
| Mon, Jan 12 | ||||||
| 24:00 | ✓ | 96% | 1300m | 15% | 33% | -31° |
| 01:00 | ✓ | 100% | 840m | 10% | 33% | -24° |
| 02:00 | ✓ | 100% | 1400m | 10% | 33% | -17° |
| 03:00 | ✓ | 100% | 1400m | 10% | 33% | -11° |
| 04:00 | ✓ | 100% | 1560m | 10% | 33% | -4.6° |
| 05:00 | ✓ | 99% | 1460m | 8% | 33% | 0.63° |
| 06:00 | ✓ | 90% | 880m | 8% | 33% | 4.7° |
| 07:00 | ✓ | 96% | 1000m | 8% | 33% | 7.3° |
| 08:00 | ✓ | 100% | 1320m | 8% | 33% | 8.3° |
| 09:00 | ✓ | 91% | 1280m | 5% | 33% | 7.6° |
| 10:00 | ✓ | 97% | 1560m | 5% | 33% | 5.3° |
| 11:00 | ✓ | 99% | 2460m | 5% | 33% | 1.5° |
| 12:00 | ✓ | 100% | 1760m | 3% | 33% | -3.5° |
| 13:00 | ✓ | 94% | 1920m | 3% | 33% | -9.5° |
| 14:00 | ✓ | 62% | 3360m | 5% | 33% | -16° |
| 15:00 | ✓ | 67% | 2780m | 5% | 24% | -23° |
| 16:00 | ✓ | 52% | 2060m | 7% | 24% | -30° |
| 17:00 | ✓ | 62% | 1300m | 9% | 24% | -37° |
| 18:00 | ✓ | 86% | 1220m | 10% | 24% | -43° |
| 19:00 | ✓ | 81% | 1060m | 10% | 24% | -48° |
| 20:00 | ✓ | 94% | 940m | 10% | 24% | -51° |
| 21:00 | ✓ | 100% | 640m | 10% | 24% | -52° |
| 22:00 | ✓ | 100% | 520m | 10% | 24% | -49° |
| 23:00 | ✓ | 100% | 600m | 11% | 24% | -45° |
| Tue, Jan 13 | ||||||
| 24:00 | ✓ | 100% | 1160m | 10% | 24% | -39° |
| 01:00 | ✓ | 100% | 1260m | 7% | 24% | -33° |
| 02:00 | ✓ | 100% | 740m | 4% | 24% | -26° |
| 03:00 | ✓ | 100% | 640m | 3% | 24% | -19° |
| 04:00 | ✓ | 100% | 1300m | 6% | 24% | -13° |
| 05:00 | ✓ | 100% | 5840m | 12% | 24% | -6.7° |
| 06:00 | ✓ | 100% | 4800m | 18% | 24% | -1.9° |
| 07:00 | ✓ | 100% | 4640m | 24% | 24% | 1.8° |
| 08:00 | ✓ | 100% | 1520m | 29% | 24% | 4° |
| 09:00 | ✓ | 100% | 5900m | 33% | 24% | 4.7° |
| 10:00 | ✓ | 100% | 1540m | 33% | 24% | 3.7° |
| 11:00 | ✓ | 100% | 1300m | 32% | 24% | 1.1° |
| 12:00 | ✓ | 100% | 7020m | 30% | 24% | -2.8° |
| 13:00 | ✓ | 90% | 4500m | 30% | 24% | -7.9° |
| 14:00 | ✓ | 100% | 2220m | 29% | 24% | -14° |
| 15:00 | ✓ | 100% | 560m | 28% | 16% | -21° |
| 16:00 | ✓ | 100% | 220m | 28% | 16% | -28° |
| 17:00 | ✓ | 100% | 240m | 28% | 16% | -35° |
| 18:00 | ✓ | 100% | 240m | 29% | 16% | -42° |
| 19:00 | ✓ | 100% | 860m | 30% | 16% | -48° |
| 20:00 | ✓ | 100% | 960m | 30% | 16% | -52° |
| 21:00 | ✓ | 100% | 900m | 30% | 16% | -55° |
| 22:00 | ✓ | 100% | 380m | 29% | 16% | -54° |
| 23:00 | ✓ | 100% | 120m | 28% | 16% | -52° |
| Wed, Jan 14 | ||||||
| 24:00 | ✓ | 100% | 180m | 26% | 16% | -47° |
| 01:00 | ✓ | 100% | 140m | 25% | 16% | -41° |
| 02:00 | ✓ | 100% | 200m | 23% | 16% | -34° |
| 03:00 | ✓ | 100% | 320m | 23% | 16% | -27° |
| 04:00 | ✓ | 100% | 640m | 23% | 16% | -20° |
| 05:00 | ✓ | 100% | 1240m | 24% | 16% | -14° |
| 06:00 | ✓ | 100% | 400m | 26% | 16% | -8.2° |
| 07:00 | ✓ | 67% | 120m | 27% | 16% | -3.6° |
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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