What conditions does Dark Skies look for?

Astronomical Night: Any. Total Cloud Coverage: ≤ 20.0%. Visibility: ≥ 12000.0m. Precipitation Chance: ≤ 10.0%. Moon Illumination: ≤ 35.0%. Moon Altitude: ≤ 10.0°

How often do conditions match?

There are 8 upcoming opportunity windows in the next 10 days.

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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

Tue, Mar 10 · 19:00–20:00 · 1h window

Medium confidence

46%

🌛Moon Altitude-56.4°

☁️Total Cloud Coverage15.5%

Excellent Dark Skies (pristine)

Valdez

Wed, Mar 11 · 06:00–07:00

🌛Moon Altitude:-2.6°

Low

Excellent Dark Skies (pristine) at Sunrise

Valdez

Wed, Mar 11 · 07:00–09:00

🌛Moon Altitude:-0.3-0.5°

Low

Pristine Dark Skies (pristine)

Valdez

Thu, Mar 12 · 24:00–05:00

🌛Moon Altitude:-42.8--15.8°

Low

Pristine Dark Skies (pristine)

Valdez

Thu, Mar 12 · 13:00–02:00

🌛Moon Altitude:-56--11.1°

Low

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 · 10:00–18:00

🌛Moon Altitude:-29.2-2.7°

Low

+1 more windows in the next 10 days

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72-hour requirements breakdown

What passed or failed, hour by hour

3matching hours in the next 95 hoursJump to next match

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°
Tue, Mar 3
16:00	✕	100%	24134m	0.3%	99%	-19°
17:00	✕	100%	21500m	0.61%	99%	-14°
18:00	✕	100%	19929m	0.91%	99%	-7.9°
19:00	✕	100%	19937m	0.61%	99%	-1.3°
20:00	✓	100%	19946m	0.3%	99%	5.5°
21:00	✓	100%	22698m	0%	99%	12°
22:00	✓	100%	19955m	0%	99%	18°
23:00	✓	100%	19956m	0%	99%	23°
Wed, Mar 4
24:00	✓	100%	19955m	0%	99%	27°
01:00	✓	100%	19968m	0%	99%	29°
02:00	✓	100%	23706m	0%	99%	29°
03:00	✓	100%	23962m	0%	99%	27°
04:00	✓	22%	16327m	0%	99%	23°
05:00	✓	17%	17342m	0%	99%	18°
06:00	✓	9.6%	24135m	0%	99%	12°
07:00	✓	0.4%	24135m	0%	99%	4.8°
08:00	✓	0%	24135m	0%	99%	-2.4°
09:00	✓	0%	24135m	0%	99%	-9.6°
10:00	✓	0%	24135m	13%	99%	-16°
11:00	✓	0%	24134m	26%	99%	-22°
12:00	✓	0%	24134m	39%	99%	-27°
13:00	✓	0%	24135m	53%	99%	-30°
14:00	✓	0.7%	24135m	67%	99%	-32°
15:00	✕	13%	24134m	82%	96%	-31°
16:00	✕	73%	24135m	79%	96%	-28°
17:00	✕	89%	19706m	76%	96%	-24°
18:00	✕	96%	250m	73%	96%	-18°
19:00	✕	98%	189m	76%	96%	-12°
20:00	✓	95%	200m	79%	96%	-4.9°
21:00	✓	93%	211m	82%	96%	1.8°
22:00	✓	94%	204m	73%	96%	8.2°
23:00	✓	95%	192m	65%	96%	14°
Thu, Mar 5
24:00	✓	92%	240m	56%	96%	18°
01:00	✓	94%	284m	61%	96%	22°
02:00	✓	95%	555m	66%	96%	23°
03:00	✓	93%	619m	72%	96%	22°
04:00	✓	91%	758m	64%	96%	20°
05:00	✓	92%	1778m	57%	96%	16°
06:00	✓	95%	959m	49%	96%	11°
07:00	✓	92%	2285m	56%	96%	4.2°
08:00	✓	98%	359m	64%	96%	-2.7°
09:00	✓	100%	242m	71%	96%	-10°
10:00	✓	100%	196m	66%	96%	-17°
11:00	✓	100%	463m	61%	96%	-24°
12:00	✓	100%	215m	56%	96%	-30°
13:00	✓	100%	181m	65%	96%	-34°
14:00	✓	98%	210m	73%	96%	-37°
15:00	✓	100%	325m	81%	90%	-38°
16:00	✓	100%	131m	85%	90%	-36°
17:00	✓	99%	127m	90%	90%	-33°
18:00	✓	100%	131m	95%	90%	-28°
19:00	✓	100%	134m	96%	90%	-22°
20:00	✓	100%	128m	97%	90%	-15°
21:00	✓	99%	159m	98%	90%	-8.2°
22:00	✓	100%	262m	98%	90%	-1.6°
23:00	✓	100%	129m	98%	90%	4.5°
Fri, Mar 6
24:00	✓	100%	119m	98%	90%	9.7°
01:00	✓	100%	105m	98%	90%	14°
02:00	✓	100%	108m	99%	90%	16°
03:00	✓	100%	105m	100%	90%	17°
04:00	✓	100%	129m	100%	90%	16°
05:00	✓	100%	142m	100%	90%	13°
06:00	✓	100%	130m	100%	90%	9°
07:00	✓	100%	151m	100%	90%	3.5°
08:00	✓	100%	314m	100%	90%	-2.9°
09:00	✓	100%	292m	100%	90%	-9.8°
10:00	✓	100%	131m	100%	90%	-17°
11:00	✓	100%	92m	100%	90%	-24°
12:00	✓	100%	88m	100%	90%	-31°
13:00	✓	100%	66m	100%	90%	-37°
14:00	✓	100%	49m	100%	90%	-41°
15:00	✓	100%	32m	100%	84%	-43°
16:00	✓	100%	27m	100%	84%	-43°
17:00	✓	100%	34m	100%	84%	-41°
18:00	✓	100%	39m	100%	84%	-37°
19:00	✓	100%	41m	100%	84%	-31°
20:00	✓	100%	37m	100%	84%	-25°
21:00	✓	100%	69m	100%	84%	-18°
22:00	✓	100%	98m	100%	84%	-11°
23:00	✓	100%	126m	100%	84%	-4.7°
Sat, Mar 7
24:00	✓	100%	155m	100%	84%	1.1°
01:00	✓	100%	167m	100%	84%	5.9°
02:00	✓	100%	179m	100%	84%	9.4°
03:00	✓	100%	191m	100%	84%	11°
04:00	✓	100%	194m	97%	84%	12°
05:00	✓	100%	198m	93%	84%	10°
06:00	✓	100%	201m	90%	84%	7.2°
07:00	✓	100%	435m	91%	84%	2.8°
08:00	✓	100%	668m	92%	84%	-2.8°
09:00	✓	100%	902m	93%	84%	-9.2°
10:00	✓	100%	640m	90%	84%	-16°
11:00	✓	100%	379m	88%	84%	-23°
12:00	✓	100%	117m	85%	84%	-30°
13:00	✓	100%	118m	85%	84%	-37°
14:00	✓	100%	119m	85%	84%	-43°

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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