Rule
Cloudscapes
Loch Achray - Cloudscapes - Trossachs & Loch Lomond
Callander, Scotland, United Kingdom
Multi-layered dramatic clouds for striking sky photography
Currently
Real-time conditionsCloud Cover100%
Wind Gusts5.9m/s
Precipitation Chance91%
Air Pressure981.1hPa
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/London
Next opportunity
Dramatic Cloud Drama
Loch Achray
Tomorrow · 17:00–19:00 · 2h window
Low confidence
38%
☁️Cloud Drama Score80-98.2%
Cloud Cover: 70%
Wind Gusts: 13.0m/s
Precipitation Chance: 52%
Air Pressure: 975.6hPa
Striking Cloud Drama
Loch Achray
Mon, Apr 13 · 08:00–09:00
☁️Cloud Drama Score:75.4%
Low
Striking Cloud Drama
Loch Achray
Wed, Apr 15 · 06:00–07:00
☁️Cloud Drama Score:88.2%
Medium
Striking Cloud Drama
Loch Achray
Wed, Apr 15 · 08:00–10:00
☁️Cloud Drama Score:84.5%
Low
Dramatic Cloud Drama at Sunset
Loch Achray
Wed, Apr 15 · 20:00–21:00
☁️Cloud Drama Score:93.8%
Medium
Dramatic Cloud Drama at Dusk
Loch Achray
Thu, Apr 16 · 21:00–22:00
☁️Cloud Drama Score:88.2%
Medium
What this forecast looks for
Plain-language explanation from the ruleThis forecast predicts when dramatic cloud formations will create compelling skies above the Trossachs lochs and mountains. We track atmospheric conditions, weather fronts, and wind patterns to identify when interesting clouds will add visual drama to your Highland landscape photography.
The Trossachs' position where Lowland Scotland meets the Highlands produces varied weather systems creating diverse cloud formations. Mountains force air upward creating orographic clouds, while the transition zone produces dramatic frontal systems.
What makes the Trossachs special for cloudscape photography:
- Mountain interaction - Ben Venue and Ben A'an creating orographic cloud formations
- Weather transitions - Highland-Lowland boundary producing varied cloud systems
- Loch reflections - Dramatic skies doubled by reflection in calm water
- Elevated viewpoints - Ben A'an summit for panoramic cloudscape compositions over multiple lochs
Ben A'an's summit provides the premier cloudscape vantage point—360-degree views encompass Loch Katrine, Loch Achray, Loch Lomond, and surrounding mountains beneath unfolding sky drama. The Trossachs Pier captures orographic clouds forming over Ben Venue's summit. Loch Venachar allows wide compositions capturing sky drama over the mountains. Spring and autumn (March-May, September-November) bring the most varied cloud conditions. Post-frontal clearing after rain systems produces dramatic cloudscapes with sunbeams and rainbow opportunities.
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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/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 | |||||
| 05:00 | 6.3% | 100% | 8.8% | 67% | 24134m |
| 06:00 | 21% | 98% | 4% | 0% | 24134m |
| 07:00 | 26% | 100% | 0% | 0% | 12548m |
| 08:00 | 35% | 100% | 0% | 0.3% | 12877m |
| 09:00 | 45% | 99% | 0% | 94% | 8642m |
| 10:00 | 56% | 93% | 2.5% | 47% | 8541m |
| 11:00 | 57% | 42% | 3.8% | 5% | 24134m |
| 12:00 | 59% | 97% | 0% | 32% | 24135m |
| 13:00 | 33% | 98% | 0% | 100% | 24134m |
| 14:00 | 32% | 71% | 0% | 100% | 24135m |
| 15:00 | 49% | 87% | 64% | 100% | 24134m |
| 16:00 | 52% | 16% | 27% | 100% | 24135m |
| 17:00 | 56% | 23% | 81% | 100% | 24135m |
| 18:00 | 63% | 18% | 64% | 100% | 24134m |
| 19:00 | 49% | 0% | 100% | 100% | 24135m |
| 20:00 | 46% | 0.6% | 100% | 100% | 24135m |
| 21:00 | 40% | 5% | 100% | 100% | 24134m |
| 22:00 | 0% | 7.2% | 99% | 100% | 24134m |
| 23:00 | 0% | 15% | 82% | 100% | 24135m |
| Thu, Apr 9 | |||||
| 24:00 | 0% | 22% | 100% | 100% | 24135m |
| 01:00 | 0% | 87% | 100% | 100% | 24135m |
| 02:00 | 0% | 100% | 100% | 100% | 24134m |
| 03:00 | 0% | 100% | 100% | 100% | 24135m |
| 04:00 | 0% | 100% | 100% | 100% | 24135m |
| 05:00 | 72% | 100% | 100% | 43% | 9750m |
| 06:00 | 67% | 100% | 100% | 100% | 5437m |
| 07:00 | 67% | 100% | 100% | 100% | 1075m |
| 08:00 | 62% | 100% | 100% | 100% | 361m |
| 09:00 | 62% | 100% | 100% | 93% | 9253m |
| 10:00 | 56% | 99% | 100% | 69% | 10184m |
| 11:00 | 55% | 94% | 33% | 3.1% | 23359m |
| 12:00 | 52% | 98% | 22% | 0% | 8563m |
| 13:00 | 73% | 72% | 56% | 0% | 24135m |
| 14:00 | 54% | 62% | 4.5% | 0% | 24135m |
| 15:00 | 60% | 61% | 0% | 0% | 24134m |
| 16:00 | 58% | 49% | 1% | 0% | 22678m |
| 17:00 | 40% | 100% | 1.4% | 0% | 1474m |
| 18:00 | 42% | 100% | 1% | 0% | 5746m |
| 19:00 | 41% | 100% | 8.4% | 0% | 4697m |
| 20:00 | 38% | 100% | 4.4% | 0% | 2716m |
| 21:00 | 86% | 42% | 27% | 0% | 24048m |
| 22:00 | 15% | 92% | 5% | 0% | 24134m |
| 23:00 | 14% | 45% | 83% | 0% | 24135m |
| Fri, Apr 10 | |||||
| 24:00 | 14% | 21% | 4.9% | 0% | 24134m |
| 01:00 | 11% | 5% | 0% | 0% | 24135m |
| 02:00 | 7.8% | 5% | 0% | 0% | 24134m |
| 03:00 | 8.2% | 5% | 0% | 0% | 24134m |
| 04:00 | 7.6% | 5% | 0% | 0% | 24135m |
| 05:00 | 11% | 5% | 0% | 0% | 24134m |
| 06:00 | 17% | 5% | 0% | 0% | 24134m |
| 07:00 | 60% | 5% | 72% | 0% | 24135m |
| 08:00 | 60% | 31% | 5% | 0% | 24134m |
| 09:00 | 74% | 29% | 82% | 0% | 24134m |
| 10:00 | 42% | 40% | 100% | 0% | 24135m |
| 11:00 | 41% | 75% | 100% | 0% | 13537m |
| 12:00 | 44% | 96% | 100% | 0% | 9790m |
| 13:00 | 40% | 92% | 100% | 0% | 21500m |
| 14:00 | 38% | 99% | 100% | 0% | 23077m |
| 15:00 | 49% | 99% | 100% | 0% | 24134m |
| 16:00 | 52% | 94% | 15% | 0% | 22337m |
| 17:00 | 80% | 71% | 43% | 0% | 24134m |
| 18:00 | 98% | 70% | 44% | 0% | 24135m |
| 19:00 | 42% | 96% | 8% | 0% | 24135m |
| 20:00 | 72% | 98% | 28% | 0% | 24135m |
| 21:00 | 65% | 100% | 51% | 0% | 24134m |
| 22:00 | 7.9% | 100% | 98% | 0% | 24135m |
| 23:00 | 6.6% | 100% | 100% | 0% | 9811m |
| Sat, Apr 11 | |||||
| 24:00 | 0% | 100% | 100% | 0% | 19962m |
| 01:00 | 0% | 100% | 100% | 0% | 8278m |
| 02:00 | 0.4% | 100% | 100% | 0% | 2774m |
| 03:00 | 0% | 100% | 100% | 0% | 644m |
| 04:00 | 3.7% | 100% | 100% | 0% | 165m |
| 05:00 | 61% | 97% | 80% | 0% | 14434m |
| 06:00 | 64% | 81% | 0% | 0% | 14504m |
| 07:00 | 75% | 58% | 0% | 0% | 22626m |
| 08:00 | 56% | 40% | 0% | 0% | 23129m |
| 09:00 | 47% | 23% | 0% | 0% | 23632m |
| 10:00 | 12% | 5% | 0% | 0% | 24135m |
| 11:00 | 47% | 33% | 1.7% | 0% | 24135m |
| 12:00 | 47% | 61% | 3.3% | 0% | 24135m |
| 13:00 | 23% | 88% | 5% | 0% | 24135m |
| 14:00 | 45% | 92% | 34% | 0.57% | 23977m |
| 15:00 | 53% | 96% | 64% | 1.1% | 23819m |
| 16:00 | 51% | 100% | 93% | 1.7% | 23660m |
| 17:00 | 53% | 87% | 95% | 1.1% | 23572m |
| 18:00 | 62% | 73% | 98% | 0.57% | 23483m |
| 19:00 | 62% | 60% | 100% | 0% | 23395m |
| 20:00 | 62% | 73% | 68% | 0% | 23223m |
| 21:00 | 53% | 87% | 37% | 0% | 23050m |
| 22:00 | 0% | 100% | 5% | 0% | 22878m |
| 23:00 | 0% | 91% | 4.9% | 0% | 23189m |
| Sun, Apr 12 | |||||
| 24:00 | 0% | 82% | 4.9% | 0% | 23501m |
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 scoreThis 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 06:26
Sunset 20:11 | |||||||||
| 03:00 ☾ | 981hPa | 100% | 100% | 91% | 87% | -23° | 100% | 5.9m/s | 2.3m/s |
| 04:00 ☾ | 980hPa | 100% | 100% | 95% | 84% | -18° | 100% | 6.1m/s | 2.4m/s |
| 05:00 ☾ | 979hPa | 43% | 100% | 96% | 92% | -12° | 100% | 6.1m/s | 2.5m/s |
| 06:00 ☾ | 978hPa | 100% | 100% | 97% | 98% | -4.2° | 100% | 5.1m/s | 2.2m/s |
| 07:00 | 978hPa | 100% | 100% | 99% | 99% | 4° | 100% | 5m/s | 2.6m/s |
| 08:00 | 977hPa | 100% | 100% | 97% | 99% | 12° | 100% | 6.3m/s | 2.9m/s |
| 09:00 | 977hPa | 93% | 100% | 95% | 93% | 20° | 100% | 9m/s | 4.3m/s |
| 10:00 | 977hPa | 69% | 100% | 93% | 94% | 28° | 100% | 8.7m/s | 2.4m/s |
| 11:00 | 978hPa | 3% | 33% | 94% | 91% | 34° | 94% | 8.6m/s | 3.3m/s |
| 12:00 | 978hPa | 0% | 22% | 96% | 79% | 39° | 98% | 10m/s | 5.6m/s |
| 13:00 | 978hPa | 0% | 56% | 98% | 66% | 41° | 72% | 11m/s | 6.1m/s |
| 14:00 | 978hPa | 0% | 4% | 78% | 63% | 41° | 62% | 12m/s | 7.9m/s |
| 15:00 | 978hPa | 0% | 0% | 58% | 60% | 38° | 61% | 13m/s | 8.1m/s |
| 16:00 | 978hPa | 0% | 1% | 39% | 61% | 32° | 49% | 13m/s | 8.6m/s |
| 17:00 | 978hPa | 0% | 1% | 42% | 86% | 25° | 100% | 14m/s | 8.1m/s |
| 18:00 | 978hPa | 0% | 1% | 46% | 91% | 17° | 100% | 13m/s | 6.3m/s |
| 19:00 | 979hPa | 0% | 8% | 49% | 87% | 9.1° | 100% | 13m/s | 6.3m/s |
| 20:00 | 980hPa | 0% | 4% | 33% | 95% | 1.1° | 100% | 13m/s | 5.2m/s |
| 21:00 ☾ | 981hPa | 0% | 27% | 16% | 86% | -7° | 42% | 12m/s | 6m/s |
| 22:00 ☾ | 982hPa | 0% | 5% | 0% | 90% | -14° | 92% | 11m/s | 4m/s |
| 23:00 ☾ | 982hPa | 0% | 83% | 0% | 83% | -20° | 83% | 11m/s | 4.7m/s |
| Fri, Apr 10
Sunrise 06:26
Sunset 20:11 | |||||||||
| 24:00 ☾ | 983hPa | 0% | 5% | 0% | 85% | -24° | 21% | 8.5m/s | 4m/s |
| 01:00 ☾ | 983hPa | 0% | 0% | 0% | 84% | -26° | 5% | 8.1m/s | 3.7m/s |
| 02:00 ☾ | 983hPa | 0% | 0% | 0% | 86% | -25° | 5% | 4.7m/s | 2.6m/s |
| 03:00 ☾ | 983hPa | 0% | 0% | 0% | 88% | -22° | 5% | 2.3m/s | 2.3m/s |
| 04:00 ☾ | 984hPa | 0% | 0% | 0% | 89% | -18° | 5% | 1.7m/s | 1.9m/s |
| 05:00 ☾ | 984hPa | 0% | 0% | 13% | 89% | -11° | 5% | 1.4m/s | 1.5m/s |
| 06:00 ☾ | 984hPa | 0% | 0% | 26% | 89% | -3.9° | 5% | 1.4m/s | 1.5m/s |
| 07:00 | 984hPa | 0% | 72% | 39% | 88% | 4.3° | 72% | 1m/s | 1.1m/s |
| 08:00 | 984hPa | 0% | 5% | 33% | 82% | 13° | 31% | 1.3m/s | 1m/s |
| 09:00 | 984hPa | 0% | 82% | 28% | 74% | 21° | 82% | 2.1m/s | 1.5m/s |
| 10:00 | 984hPa | 0% | 100% | 22% | 70% | 28° | 100% | 3.1m/s | 2.2m/s |
| 11:00 | 983hPa | 0% | 100% | 33% | 66% | 35° | 100% | 3.6m/s | 2.8m/s |
| 12:00 | 983hPa | 0% | 100% | 45% | 63% | 39° | 100% | 5m/s | 3.9m/s |
| 13:00 | 982hPa | 0% | 100% | 56% | 60% | 42° | 100% | 5.8m/s | 4.3m/s |
| 14:00 | 981hPa | 0% | 100% | 50% | 51% | 41° | 100% | 6.9m/s | 4.8m/s |
| 15:00 | 980hPa | 0% | 100% | 44% | 50% | 38° | 100% | 8m/s | 4.9m/s |
| 16:00 | 978hPa | 0% | 15% | 39% | 53% | 32° | 94% | 9.7m/s | 6.6m/s |
| 17:00 | 977hPa | 0% | 43% | 45% | 54% | 25° | 71% | 11m/s | 7.1m/s |
| 18:00 | 976hPa | 0% | 44% | 52% | 57% | 18° | 70% | 13m/s | 6.9m/s |
| 19:00 | 975hPa | 0% | 8% | 58% | 62% | 9.4° | 96% | 13m/s | 6.6m/s |
| 20:00 | 974hPa | 0% | 28% | 66% | 68% | 1.4° | 98% | 13m/s | 6.4m/s |
| 21:00 ☾ | 972hPa | 0% | 51% | 75% | 70% | -6.7° | 100% | 13m/s | 6.4m/s |
| 22:00 ☾ | 970hPa | 0% | 98% | 83% | 73% | -14° | 100% | 14m/s | 7.1m/s |
| 23:00 ☾ | 969hPa | 0% | 100% | 87% | 87% | -20° | 100% | 15m/s | 6.6m/s |
| Sat, Apr 11
Sunrise 06:24
Sunset 20:13 | |||||||||
| 24:00 ☾ | 966hPa | 0% | 100% | 91% | 88% | -24° | 100% | 15m/s | 7.1m/s |
| 01:00 ☾ | 964hPa | 0% | 100% | 96% | 92% | -25° | 100% | 16m/s | 7.3m/s |
| 02:00 ☾ | 962hPa | 0% | 100% | 85% | 96% | -25° | 100% | 16m/s | 7.1m/s |
| 03:00 ☾ | 960hPa | 0% | 100% | 75% | 97% | -22° | 100% | 20m/s | 6.1m/s |
| 04:00 ☾ | 960hPa | 0% | 100% | 64% | 98% | -17° | 100% | 15m/s | 6.9m/s |
| 05:00 ☾ | 961hPa | 0% | 80% | 67% | 95% | -11° | 98% | 13m/s | 6m/s |
| 06:00 ☾ | 961hPa | 0% | 0% | 71% | 92% | -3.5° | 81% | 13m/s | 6.3m/s |
| 07:00 | 961hPa | 0% | 0% | 74% | 90% | 4.6° | 58% | 12m/s | 5.7m/s |
| 08:00 | 967hPa | 0% | 0% | 62% | 76% | 13° | 40% | 12m/s | 6.3m/s |
| 09:00 | 973hPa | 0% | 0% | 50% | 62% | 21° | 23% | 12m/s | 6.9m/s |
| 10:00 | 979hPa | 0% | 0% | 38% | 48% | 29° | 5% | 12m/s | 7.5m/s |
| 11:00 | 979hPa | 0% | 2% | 48% | 55% | 35° | 33% | 13m/s | 7.5m/s |
| 12:00 | 978hPa | 0% | 3% | 58% | 62% | 40° | 61% | 15m/s | 7.5m/s |
| 13:00 | 978hPa | 0% | 5% | 68% | 70% | 42° | 88% | 16m/s | 7.5m/s |
| 14:00 | 977hPa | 1% | 34% | 58% | 74% | 42° | 92% | 16m/s | 7.6m/s |
| 15:00 | 976hPa | 1% | 64% | 47% | 79% | 38° | 96% | 17m/s | 7.7m/s |
| 16:00 | 976hPa | 2% | 93% | 36% | 84% | 33° | 100% | 17m/s | 7.9m/s |
| 17:00 | 975hPa | 1% | 95% | 44% | 82% | 26° | 100% | 16m/s | 7.3m/s |
| 18:00 | 975hPa | 1% | 98% | 53% | 80% | 18° | 100% | 15m/s | 6.8m/s |
| 19:00 | 975hPa | 0% | 100% | 61% | 79% | 9.6° | 100% | 14m/s | 6.2m/s |
| 20:00 | 975hPa | 0% | 68% | 59% | 79% | 1.6° | 100% | 14m/s | 6.7m/s |
| 21:00 ☾ | 974hPa | 0% | 37% | 57% | 80% | -6.5° | 100% | 15m/s | 7.1m/s |
| 22:00 ☾ | 974hPa | 0% | 5% | 54% | 80% | -13° | 100% | 16m/s | 7.5m/s |
| 23:00 ☾ | 974hPa | 0% | 5% | 58% | 81% | -19° | 91% | 15m/s | 7.4m/s |
| Sun, Apr 12
Sunrise 06:21
Sunset 20:15 | |||||||||
| 24:00 ☾ | 974hPa | 0% | 5% | 61% | 81% | -23° | 82% | 15m/s | 7.3m/s |
| 01:00 ☾ | 974hPa | 0% | 5% | 64% | 81% | -25° | 73% | 14m/s | 7.2m/s |
| 02:00 ☾ | 975hPa | 0% | 28% | 57% | 86% | -25° | 82% | 14m/s | 7.6m/s |
How to read: these inputs help produce the derived score; they are not requirements by themselves.
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