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Rule Cloudscapes

Capel Curig - Cloudscapes - Snowdonia (Eryri)

Capel Curig, Wales, United Kingdom

Multi-layered dramatic clouds for striking sky photography

Currently

Real-time conditions
Cloud Cover100%
Wind Gusts8.4m/s
Precipitation Chance66%
Air Pressure982.3hPa

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
Next opportunity
Striking Cloud Drama
Capel Curig
Sat, Apr 11 · 12:00–14:00 · 2h window
Low confidence
31%
☁️Cloud Drama Score78.7-79.7%
Cloud Cover: 80%
Wind Gusts: 17.9m/s
Precipitation Chance: 77%
Air Pressure: 962.2hPa
overcast weather icon
Dramatic Cloud Drama at Sunset
Capel Curig
Sun, Apr 12 · 20:00–21:00
☁️Cloud Drama Score:91%
Medium
overcast weather icon
Striking Cloud Drama
Capel Curig
Wed, Apr 15 · 09:00–10:00
☁️Cloud Drama Score:80.6%
Low
overcast weather icon
Dramatic Cloud Drama at Sunrise
Capel Curig
Fri, Apr 17 · 06:00–07:00
☁️Cloud Drama Score:100%
Medium
overcast weather icon
Dramatic Cloud Drama
Capel Curig
Fri, Apr 17 · 18:00–19:00
☁️Cloud Drama Score:85.8%
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when dramatic cloud formations combine with mountain topography to create powerful sky-dominated compositions in Snowdonia. We track cloud types, movement patterns, and weather system dynamics to predict optimal cloudscape photography conditions.

Snowdonia's high peaks intercept Atlantic weather systems, creating dramatic cloud interactions as moisture-laden air is forced upward over mountain barriers. The result is constantly changing cloudscapes—from cloud waterfalls pouring over passes to lenticular formations stacking over summits, and dramatic storm systems sweeping through valleys. The region's notorious weather variability means cloud drama is a near-constant feature of the mountain landscape.

What makes Snowdonia cloudscape photography distinctive:

  • Orographic effects - Mountains force air upward, creating dramatic cloud formations at summits and passes
  • Tryfan drama - The iconic north face often has cloud streaming across its buttresses and ridges
  • Valley systems - Llanberis Pass and Ogwen Valley channel weather, creating dynamic cloud movement
  • Rapid changes - Atlantic weather systems bring quickly evolving conditions with dramatic light breaks

The most dramatic cloudscapes occur during and immediately after frontal passage—when weather systems move through and clearing begins. Ogwen Valley is particularly productive for cloudscape photography—position yourself at Llyn Ogwen or the Pont Pen-y-benglog bridge to capture cloud drama over Tryfan and the Glyderau range. The confined valley channels weather systems, creating spectacular cloud movement. Llanberis Pass shows dramatic cloud interactions with steep valley walls—clouds pour over Snowdon's eastern slopes or stream through the pass itself. Capel Curig sits at a junction of valleys, creating varied cloudscape compositions with Snowdon, Moel Siabod, and the Carneddau all visible under different sky conditions. For elevated cloudscape photography, the ridge of Pen yr Ole Wen provides dramatic perspectives with cloud systems moving through the valley below. Autumn and winter (October-March) deliver the most dramatic cloudscape conditions as Atlantic storm systems are more frequent and vigorous. Our forecast identifies conditions when cloud formations are photogenic rather than simply overcast—tracking when broken skies create light and shadow play across mountain faces.

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72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time
Europe/London
Cloud Drama Score
≥ 75.0%
Low Clouds
≥ 20.0%
Mid-Level Clouds
OR1·B1
≥ 30.0%
High Clouds
OR1·B2
≥ 40.0%
Visibility
≥ 5000.0m
Wed, Apr 8
02:0013%0%0%21%24135m
03:0014%0%0%79%24134m
04:005.6%0%0.1%19%24135m
05:0011%0.1%4.9%24%24134m
06:0056%0.5%4.8%69%24134m
07:0048%6.9%5%13%24135m
08:0024%0%3%5%24135m
09:0029%2.7%0%5%24134m
10:0027%0%0%5%24135m
11:0022%0.3%0%4.9%24134m
12:0036%19%0%1.5%23864m
13:0022%8.8%0%0.6%23858m
14:0018%3.6%0%0%23861m
15:0020%3.9%0%0%23863m
16:0033%6.9%0%9.1%23864m
17:0027%0.4%0%100%23869m
18:0026%3.1%0%100%23991m
19:0041%14%0%100%24135m
20:0036%16%4.5%100%22420m
21:0032%19%3.3%100%22266m
22:000.1%22%4.2%100%24134m
23:001%54%3.2%100%1778m
Thu, Apr 9
24:007.8%91%4.8%100%235m
01:000.1%97%4.7%100%1036m
02:000%97%100%100%1960m
03:000%49%100%100%24135m
04:000%19%100%100%24135m
05:000.1%27%100%100%22596m
06:0073%88%22%100%3398m
07:0052%100%4.9%100%2787m
08:0049%100%5%100%248m
09:0066%100%38%76%122m
10:0055%100%47%85%140m
11:0053%100%96%100%23584m
12:0045%84%100%100%24135m
13:0032%98%5%100%6035m
14:0074%60%1.3%30%23395m
15:0047%98%99%2.8%2987m
16:0046%75%0.1%0%24135m
17:0052%74%0%0%23620m
18:0055%26%0%0%24126m
19:0061%25%0%0%24135m
20:0024%5%0%0%24135m
21:0025%6.1%0.2%0%24134m
22:0015%7.4%12%0%24134m
23:0015%6.9%38%54%24135m
Fri, Apr 10
24:0015%5.1%100%98%24134m
01:0015%7.4%91%84%24135m
02:0013%5%100%100%24134m
03:003.1%5%100%100%24134m
04:002.2%5%100%100%24135m
05:000%5%100%100%24134m
06:0056%98%100%100%24134m
07:0056%92%100%100%24135m
08:0052%97%100%100%24134m
09:0055%74%100%100%24134m
10:0049%74%100%100%24135m
11:0051%54%100%71%24135m
12:0040%99%100%100%24134m
13:0043%100%100%100%24134m
14:0041%100%100%100%24134m
15:0041%100%95%100%5412m
16:0046%100%97%4.9%5702m
17:0057%100%19%6.4%7698m
18:0036%100%8.5%0.1%13254m
19:0042%100%0%5%2460m
20:0062%100%2.4%52%22552m
21:0066%100%76%1.3%2814m
22:005.9%100%64%0%6948m
23:000.5%100%50%0%23998m
Sat, Apr 11
24:000%100%100%0.2%9714m
01:000%100%100%0%13602m
02:001.1%100%69%0.1%602m
03:000%100%0%23%340m
04:000%76%0.1%29%24135m
05:000%5.1%0%36%24135m
06:0066%98%0.1%13%10094m
07:0038%88%0.5%4.9%24135m
08:0073%92%22%3.3%17284m
09:0074%96%43%1.6%10433m
10:0063%100%64%0%3582m
11:0065%89%57%0%10106m
12:0079%78%50%0%16629m
13:0080%67%42%0%23153m
14:0068%78%30%0.03%18326m
15:0050%89%17%0.07%13500m
16:0035%100%5%0.1%8673m
17:0055%100%13%0.07%7203m
18:0069%100%22%0.03%5732m
19:0069%100%30%0%4261m
20:0069%100%50%0%5793m
21:0055%100%70%0%7324m
22:000%100%89%0%8856m
23:000%100%93%0%8942m
Sun, Apr 12
24:000%100%96%0%9028m
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.

What does Cloud Drama Score mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Europe/London
Air Pressure
hPa
High Clouds
%
Mid-Level Clouds
%
Precipitation Chance
%
Relative Humidity
%
Solar Elevation
°
Total Cloud Coverage
%
Wind Gusts
m/s
Wind Speed
m/s
Thu, Apr 9 Sunrise 06:31 Sunset 20:04
03:00
982hPa 100% 100% 66% 93% -26° 100% 8.4m/s 4.4m/s
04:00
982hPa 100% 100% 100% 96% -20° 100% 9.8m/s 4.5m/s
05:00
981hPa 100% 100% 100% 96% -13° 100% 10m/s 4.9m/s
06:00
981hPa 100% 22% 100% 96% -5.2° 100% 12m/s 6.4m/s
07:00
980hPa 100% 5% 100% 95% 3.7° 100% 13m/s 5.9m/s
08:00
980hPa 100% 5% 99% 97% 13° 100% 12m/s 5.7m/s
09:00
980hPa 76% 38% 98% 98% 21° 100% 11m/s 5.3m/s
10:00
980hPa 85% 47% 96% 98% 30° 100% 9.8m/s 4.4m/s
11:00
980hPa 100% 96% 96% 92% 37° 100% 9.4m/s 5.2m/s
12:00
981hPa 100% 100% 97% 84% 42° 100% 9.7m/s 6.7m/s
13:00
981hPa 100% 5% 97% 84% 44° 100% 10m/s 8.3m/s
14:00
981hPa 30% 1% 72% 81% 44° 60% 10m/s 7.5m/s
15:00
981hPa 3% 99% 47% 75% 40° 100% 10m/s 8.1m/s
16:00
982hPa 0% 0% 22% 75% 34° 75% 11m/s 7.6m/s
17:00
982hPa 0% 0% 36% 69% 26° 74% 12m/s 8.1m/s
18:00
982hPa 0% 0% 50% 72% 18° 26% 11m/s 7.5m/s
19:00
983hPa 0% 0% 64% 74% 8.9° 25% 12m/s 7.5m/s
20:00
983hPa 0% 0% 43% 76% 0.38° 5% 11m/s 5.6m/s
21:00
984hPa 0% 0% 21% 77% -8.6° 6% 11m/s 5.4m/s
22:00
985hPa 0% 12% 0% 76% -16° 12% 11m/s 5m/s
23:00
985hPa 54% 38% 0% 78% -22° 54% 11m/s 5.1m/s
Fri, Apr 10 Sunrise 06:31 Sunset 20:04
24:00
985hPa 98% 100% 0% 80% -27° 100% 10m/s 4.3m/s
01:00
985hPa 84% 91% 0% 80% -29° 93% 9.6m/s 3.9m/s
02:00
985hPa 100% 100% 0% 82% -28° 100% 6.9m/s 2.4m/s
03:00
985hPa 100% 100% 0% 83% -25° 100% 1.7m/s 1.6m/s
04:00
984hPa 100% 100% 0% 82% -20° 100% 1m/s 0.96m/s
05:00
984hPa 100% 100% 0% 80% -13° 100% 1m/s 0.96m/s
06:00
984hPa 100% 100% 0% 78% -4.8° 100% 0.8m/s 0.83m/s
07:00
984hPa 100% 100% 0% 77% 100% 1.1m/s 1.2m/s
08:00
983hPa 100% 100% 17% 75% 13° 100% 2m/s 1.6m/s
09:00
983hPa 100% 100% 33% 71% 22° 100% 3.1m/s 2.1m/s
10:00
982hPa 100% 100% 50% 66% 30° 100% 3.4m/s 2.2m/s
11:00
982hPa 71% 100% 58% 61% 37° 100% 5m/s 3m/s
12:00
981hPa 100% 100% 66% 58% 42° 100% 5.7m/s 3.8m/s
13:00
980hPa 100% 100% 74% 61% 45° 100% 6.8m/s 4.3m/s
14:00
979hPa 100% 100% 59% 66% 44° 100% 7.4m/s 4.5m/s
15:00
978hPa 100% 95% 45% 76% 40° 100% 7.7m/s 4.1m/s
16:00
977hPa 5% 97% 30% 82% 34° 100% 7.9m/s 4m/s
17:00
975hPa 6% 19% 41% 84% 27° 100% 8.6m/s 3.6m/s
18:00
974hPa 0% 8% 51% 87% 18° 100% 9.1m/s 3.7m/s
19:00
972hPa 5% 0% 62% 94% 9.1° 100% 10m/s 3.3m/s
20:00
970hPa 52% 2% 74% 93% 0.6° 100% 12m/s 5m/s
21:00
969hPa 1% 76% 86% 94% -8.3° 100% 13m/s 5m/s
22:00
968hPa 0% 64% 97% 89% -16° 100% 16m/s 5.8m/s
23:00
966hPa 0% 50% 98% 90% -22° 100% 16m/s 5.7m/s
Sat, Apr 11 Sunrise 06:28 Sunset 20:06
24:00
964hPa 0% 100% 99% 90% -27° 100% 17m/s 6.2m/s
01:00
963hPa 0% 100% 100% 92% -29° 100% 19m/s 7.3m/s
02:00
963hPa 0% 69% 86% 97% -28° 100% 16m/s 8.1m/s
03:00
964hPa 23% 0% 73% 95% -25° 100% 15m/s 7.1m/s
04:00
964hPa 29% 0% 59% 83% -20° 76% 15m/s 9.5m/s
05:00
963hPa 36% 0% 61% 85% -13° 36% 15m/s 9.7m/s
06:00
963hPa 13% 0% 64% 88% -4.5° 98% 15m/s 9.3m/s
07:00
965hPa 5% 0% 66% 89% 4.3° 88% 12m/s 7.8m/s
08:00
964hPa 3% 22% 60% 84% 13° 92% 13m/s 7.8m/s
09:00
964hPa 2% 43% 55% 79% 22° 96% 15m/s 7.9m/s
10:00
963hPa 0% 64% 49% 74% 30° 100% 16m/s 8m/s
11:00
963hPa 0% 57% 63% 79% 37° 90% 17m/s 9.2m/s
12:00
962hPa 0% 50% 77% 83% 43° 80% 18m/s 10m/s
13:00
962hPa 0% 42% 90% 87% 45° 70% 19m/s 12m/s
14:00
962hPa 0% 30% 91% 89% 45° 80% 19m/s 12m/s
15:00
962hPa 0% 17% 91% 91% 41° 90% 18m/s 12m/s
16:00
962hPa 0% 5% 92% 93% 35° 100% 18m/s 12m/s
17:00
962hPa 0% 13% 93% 94% 27° 100% 18m/s 12m/s
18:00
962hPa 0% 22% 94% 94% 18° 100% 18m/s 12m/s
19:00
962hPa 0% 30% 96% 95% 9.4° 100% 17m/s 12m/s
20:00
962hPa 0% 50% 89% 94% 0.83° 100% 16m/s 11m/s
21:00
961hPa 0% 70% 82% 94% -8° 100% 16m/s 9.9m/s
22:00
961hPa 0% 89% 75% 94% -16° 100% 15m/s 9m/s
23:00
961hPa 0% 93% 81% 94% -22° 100% 14m/s 8.3m/s
Sun, Apr 12 Sunrise 06:26 Sunset 20:08
24:00
961hPa 0% 96% 87% 95% -26° 100% 13m/s 7.5m/s
01:00
962hPa 0% 99% 93% 95% -28° 100% 11m/s 6.7m/s
02:00
962hPa 0% 99% 93% 94% -28° 100% 12m/s 7.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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