Rule
Dark Skies
Valdez - Dark Skies - Alaska
Valdez, Alaska, United States
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in America/Anchorage
Next opportunity
Good Dark Skies
Valdez
Tomorrow · 02:00–07:00 · 5h window
Medium confidence
46%
🌛Moon Altitude-23.1--2.6°
☁️Total Cloud Coverage11.2-19.9%
Pristine Dark Skies (pristine) at Sunrise
Valdez
Tomorrow · 07:00–10:00
🌛Moon Altitude:-0.3-0.5°
Medium
Pristine Dark Skies (pristine)
Valdez
Tomorrow · 10:00–07:00
🌛Moon Altitude:-56.9--2.5°
Medium
Pristine Dark Skies (pristine) at Sunrise
Valdez
Thu, Mar 12 · 07:00–10:00
🌛Moon Altitude:-1.9-0.9°
Medium
Pristine Dark Skies (pristine)
Valdez
Thu, Mar 12 · 10:00–07:00
🌛Moon Altitude:-56-0°
Medium
Pristine Dark Skies (pristine) at Sunrise
Valdez
Fri, Mar 13 · 07:00–10:00
🌛Moon Altitude:-3.2-2.3°
Low
Pristine Dark Skies (pristine)
Valdez
Fri, Mar 13 · 10:00–13:00
🌛Moon Altitude:-0.9-2.7°
Low
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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 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° |
|---|---|---|---|---|---|---|
| Mon, Mar 9 | ||||||
| 20:00 | ✕ | 91% | 16833m | 0% | 58% | -53° |
| 21:00 | ✓ | 91% | 17059m | 0% | 58% | -49° |
| 22:00 | ✓ | 82% | 17298m | 0% | 58% | -43° |
| 23:00 | ✓ | 85% | 17008m | 0% | 58% | -37° |
| Tue, Mar 10 | ||||||
| 24:00 | ✓ | 100% | 16909m | 0% | 58% | -30° |
| 01:00 | ✓ | 99% | 16983m | 0% | 58% | -23° |
| 02:00 | ✓ | 99% | 17036m | 0% | 58% | -17° |
| 03:00 | ✓ | 100% | 17346m | 0% | 58% | -11° |
| 04:00 | ✓ | 100% | 18101m | 0% | 58% | -5.8° |
| 05:00 | ✓ | 100% | 19426m | 0% | 58% | -2° |
| 06:00 | ✓ | 100% | 19637m | 0% | 58% | 0.5° |
| 07:00 | ✓ | 100% | 19654m | 0% | 58% | 1.5° |
| 08:00 | ✓ | 100% | 19660m | 0% | 58% | 0.86° |
| 09:00 | ✓ | 98% | 19649m | 0% | 58% | -1.3° |
| 10:00 | ✓ | 94% | 22710m | 0% | 58% | -4.8° |
| 11:00 | ✓ | 92% | 24135m | 0% | 58% | -9.5° |
| 12:00 | ✓ | 99% | 24135m | 0% | 58% | -15° |
| 13:00 | ✓ | 99% | 24134m | 0% | 58% | -22° |
| 14:00 | ✓ | 99% | 20070m | 0% | 58% | -28° |
| 15:00 | ✓ | 99% | 19078m | 0% | 58% | -35° |
| 16:00 | ✕ | 98% | 18653m | 0% | 49% | -42° |
| 17:00 | ✕ | 94% | 18294m | 0% | 49% | -49° |
| 18:00 | ✕ | 88% | 17929m | 0% | 49% | -53° |
| 19:00 | ✕ | 78% | 17882m | 0% | 49% | -56° |
| 20:00 | ✕ | 64% | 17808m | 0% | 49% | -57° |
| 21:00 | ✕ | 29% | 18044m | 0% | 49% | -54° |
| 22:00 | ✓ | 30% | 18074m | 0% | 49% | -50° |
| 23:00 | ✓ | 29% | 18002m | 0% | 49% | -44° |
| Wed, Mar 11 | ||||||
| 24:00 | ✓ | 28% | 17848m | 0% | 49% | -37° |
| 01:00 | ✓ | 27% | 18052m | 0% | 49% | -30° |
| 02:00 | ✓ | 20% | 19465m | 0% | 49% | -23° |
| 03:00 | ✓ | 18% | 21595m | 0% | 49% | -17° |
| 04:00 | ✓ | 14% | 22853m | 0% | 49% | -11° |
| 05:00 | ✓ | 14% | 22996m | 0% | 49% | -6.2° |
| 06:00 | ✓ | 11% | 23112m | 0% | 49% | -2.6° |
| 07:00 | ✓ | 11% | 23160m | 0% | 49% | -0.3° |
| 08:00 | ✓ | 10% | 23282m | 0% | 49% | 0.48° |
| 09:00 | ✓ | 1.3% | 24134m | 0% | 49% | -0.28° |
| 10:00 | ✓ | 0.9% | 24134m | 0% | 49% | -2.5° |
| 11:00 | ✓ | 1.7% | 24135m | 0% | 49% | -6.2° |
| 12:00 | ✓ | 1.2% | 24135m | 0% | 49% | -11° |
| 13:00 | ✓ | 0.5% | 24135m | 0% | 49% | -17° |
| 14:00 | ✓ | 0.5% | 24134m | 0% | 49% | -23° |
| 15:00 | ✓ | 0.5% | 24135m | 0% | 49% | -30° |
| 16:00 | ✓ | 0.5% | 24134m | 0% | 39% | -37° |
| 17:00 | ✓ | 0.9% | 24135m | 0% | 39% | -44° |
| 18:00 | ✓ | 0.9% | 24134m | 0% | 39% | -50° |
| 19:00 | ✓ | 7.7% | 23572m | 0% | 39% | -54° |
| 20:00 | ✓ | 10% | 23583m | 0% | 39% | -57° |
| 21:00 | ✓ | 0.5% | 24134m | 0% | 39% | -57° |
| 22:00 | ✓ | 0.5% | 24135m | 0% | 39% | -54° |
| 23:00 | ✓ | 0% | 24135m | 0% | 39% | -49° |
| Thu, Mar 12 | ||||||
| 24:00 | ✓ | 0% | 24135m | 0% | 39% | -43° |
| 01:00 | ✓ | 0% | 24134m | 0% | 39% | -36° |
| 02:00 | ✓ | 0% | 24134m | 0% | 39% | -29° |
| 03:00 | ✓ | 0% | 24134m | 0% | 39% | -22° |
| 04:00 | ✓ | 0% | 24134m | 0% | 39% | -16° |
| 05:00 | ✓ | 0% | 24134m | 0% | 39% | -10° |
| 06:00 | ✓ | 0% | 24135m | 0% | 39% | -5.4° |
| 07:00 | ✓ | 0% | 24134m | 0% | 39% | -1.9° |
| 08:00 | ✓ | 0.5% | 24135m | 0% | 39% | 0.27° |
| 09:00 | ✓ | 0.5% | 24135m | 0% | 39% | 0.91° |
| 10:00 | ✓ | 0.5% | 24134m | 0% | 39% | -0.008° |
| 11:00 | ✓ | 0.5% | 24134m | 0% | 39% | -2.4° |
| 12:00 | ✓ | 0% | 24134m | 0% | 39% | -6.2° |
| 13:00 | ✓ | 0% | 24134m | 0% | 39% | -11° |
| 14:00 | ✓ | 0% | 24134m | 0% | 39% | -17° |
| 15:00 | ✓ | 0% | 24134m | 0% | 39% | -23° |
| 16:00 | ✓ | 0% | 24135m | 0% | 30% | -30° |
| 17:00 | ✓ | 0.4% | 24134m | 0% | 30% | -37° |
| 18:00 | ✓ | 0.9% | 24134m | 0% | 30% | -44° |
| 19:00 | ✓ | 8.5% | 24114m | 0% | 30% | -49° |
| 20:00 | ✓ | 0.9% | 24134m | 0% | 30% | -54° |
| 21:00 | ✓ | 0% | 24135m | 0% | 30% | -56° |
| 22:00 | ✓ | 0% | 24135m | 0% | 30% | -55° |
| 23:00 | ✓ | 0% | 24135m | 0% | 30% | -52° |
| Fri, Mar 13 | ||||||
| 24:00 | ✓ | 0% | 24135m | 0% | 30% | -47° |
| 01:00 | ✓ | 0% | 24135m | 0% | 30% | -41° |
| 02:00 | ✓ | 0.03% | 24135m | 0% | 30% | -34° |
| 03:00 | ✓ | 0.07% | 24135m | 0% | 30% | -27° |
| 04:00 | ✓ | 0.1% | 24135m | 0% | 30% | -20° |
| 05:00 | ✓ | 0.1% | 24135m | 0% | 30% | -14° |
| 06:00 | ✓ | 0.1% | 24135m | 0% | 30% | -7.9° |
| 07:00 | ✓ | 0.1% | 24135m | 0% | 30% | -3.2° |
| 08:00 | ✓ | 1.7% | 24135m | 0% | 30% | 0.23° |
| 09:00 | ✓ | 3.4% | 24135m | 0% | 30% | 2.3° |
| 10:00 | ✓ | 5% | 24135m | 0% | 30% | 2.7° |
| 11:00 | ✓ | 10% | 24135m | 0% | 30% | 1.7° |
| 12:00 | ✓ | 16% | 24135m | 0% | 30% | -0.95° |
| 13:00 | ✓ | 21% | 24135m | 0% | 30% | -4.9° |
| 14:00 | ✓ | 40% | 24135m | 0% | 30% | -9.9° |
| 15:00 | ✓ | 58% | 24135m | 0% | 30% | -16° |
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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