Rule
Cloudscapes
Callander - Cloudscapes - Trossachs & Loch Lomond
Callander, Scotland, United Kingdom
Multi-layered dramatic clouds for striking sky photography
Currently
Real-time conditionsCloud Cover74%
Wind Gusts6.6m/s
Precipitation Chance0%
Air Pressure995.3hPa
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/London
Next opportunity
Striking Cloud Drama at Sunrise
Callander
Sun, May 31 · 05:00–06:00 · 1h window
Medium confidence
48%
☁️Cloud Drama Score82.6%
Cloud Cover: 99%
Wind Gusts: 5.3m/s
Precipitation Chance: 40%
Air Pressure: 991.1hPa
Striking Cloud Drama at Sunset
Callander
Sun, May 31 · 20:00–21:00
☁️Cloud Drama Score:80.6%
Low
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 hour0matching hours in the next 80 hours
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 |
|---|---|---|---|---|---|
| Sun, May 24 | |||||
| 05:00 | 43% | 99% | 5% | 83% | 24134m |
| 06:00 | 61% | 94% | 5% | 13% | 24135m |
| 07:00 | 59% | 47% | 5% | 4.9% | 24134m |
| 08:00 | 57% | 98% | 5% | 43% | 24134m |
| 09:00 | 51% | 78% | 7.2% | 75% | 24134m |
| 10:00 | 67% | 60% | 5% | 69% | 24134m |
| 11:00 | 64% | 78% | 5% | 58% | 24135m |
| 12:00 | 48% | 97% | 5% | 49% | 24134m |
| 13:00 | 37% | 99% | 5% | 93% | 24135m |
| 14:00 | 66% | 74% | 2.9% | 53% | 24135m |
| 15:00 | 58% | 29% | 4.6% | 7.2% | 24135m |
| 16:00 | 75% | 20% | 5% | 31% | 24134m |
| 17:00 | 68% | 31% | 5% | 5.1% | 24134m |
| 18:00 | 62% | 40% | 3.9% | 5% | 24134m |
| 19:00 | 49% | 12% | 3.9% | 6.5% | 24134m |
| 20:00 | 33% | 2.4% | 2.8% | 4.5% | 24135m |
| 21:00 | 32% | 2% | 4.3% | 0.6% | 24134m |
| 22:00 | 22% | 2.3% | 2.3% | 0% | 24135m |
| 23:00 | 25% | 1.9% | 4.1% | 0% | 24134m |
| Mon, May 25 | |||||
| 24:00 | 15% | 0.3% | 5% | 0% | 24135m |
| 01:00 | 8.7% | 0% | 5% | 0% | 24135m |
| 02:00 | 8.4% | 0% | 5% | 0% | 24135m |
| 03:00 | 16% | 0% | 5% | 0% | 24135m |
| 04:00 | 20% | 0% | 4.4% | 0% | 24135m |
| 05:00 | 22% | 1% | 5% | 0% | 24134m |
| 06:00 | 21% | 2.1% | 5% | 0% | 24134m |
| 07:00 | 25% | 0% | 7.4% | 0% | 24134m |
| 08:00 | 25% | 0% | 6.3% | 0% | 24135m |
| 09:00 | 39% | 0.2% | 12% | 0% | 24134m |
| 10:00 | 75% | 16% | 12% | 0% | 24135m |
| 11:00 | 24% | 6.8% | 5% | 0% | 24135m |
| 12:00 | 24% | 1.7% | 5% | 0% | 24134m |
| 13:00 | 23% | 1.8% | 5% | 0% | 24135m |
| 14:00 | 26% | 3.8% | 4.1% | 0% | 24134m |
| 15:00 | 23% | 0.4% | 5% | 0% | 24134m |
| 16:00 | 21% | 2.3% | 4.9% | 0% | 24134m |
| 17:00 | 26% | 4.5% | 5% | 0% | 24134m |
| 18:00 | 23% | 0.4% | 5% | 0% | 24135m |
| 19:00 | 28% | 1.3% | 5% | 0% | 24134m |
| 20:00 | 25% | 2.1% | 5% | 0% | 24135m |
| 21:00 | 20% | 1.7% | 5% | 0% | 24134m |
| 22:00 | 15% | 2.1% | 5% | 0% | 24135m |
| 23:00 | 15% | 2.3% | 5% | 0% | 24134m |
| Tue, May 26 | |||||
| 24:00 | 20% | 2.3% | 5% | 2.7% | 24134m |
| 01:00 | 7.8% | 2.3% | 5% | 5% | 24135m |
| 02:00 | 9.1% | 2.3% | 5% | 5% | 24134m |
| 03:00 | 26% | 2.1% | 5% | 5% | 24135m |
| 04:00 | 36% | 9.1% | 5% | 5% | 24134m |
| 05:00 | 72% | 55% | 5% | 5% | 24134m |
| 06:00 | 63% | 22% | 5% | 5% | 24134m |
| 07:00 | 96% | 40% | 15% | 5% | 24135m |
| 08:00 | 94% | 79% | 14% | 5% | 24134m |
| 09:00 | 83% | 69% | 11% | 5.9% | 24135m |
| 10:00 | 51% | 88% | 19% | 5% | 24134m |
| 11:00 | 52% | 47% | 5% | 5% | 24135m |
| 12:00 | 37% | 15% | 5% | 5.6% | 24134m |
| 13:00 | 39% | 15% | 5% | 5.7% | 24134m |
| 14:00 | 24% | 6.4% | 5% | 5% | 24134m |
| 15:00 | 46% | 21% | 5% | 5% | 24135m |
| 16:00 | 42% | 19% | 5% | 5% | 24135m |
| 17:00 | 83% | 42% | 5% | 13% | 24134m |
| 18:00 | 40% | 83% | 5% | 66% | 24135m |
| 19:00 | 68% | 56% | 5% | 5% | 24134m |
| 20:00 | 78% | 42% | 7.7% | 37% | 24134m |
| 21:00 | 56% | 28% | 10% | 68% | 24135m |
| 22:00 | 52% | 14% | 13% | 100% | 24135m |
| 23:00 | 36% | 9.7% | 8.7% | 78% | 24135m |
| Wed, May 27 | |||||
| 24:00 | 49% | 5.7% | 4.4% | 57% | 24135m |
| 01:00 | 0% | 1.8% | 0% | 35% | 24135m |
| 02:00 | 49% | 1.5% | 0% | 31% | 24135m |
| 03:00 | 43% | 1.2% | 0% | 27% | 24135m |
| 04:00 | 50% | 0.9% | 0% | 23% | 24135m |
| 05:00 | 50% | 4.6% | 0% | 28% | 24135m |
| 06:00 | 64% | 8.4% | 0% | 34% | 24135m |
| 07:00 | 74% | 12% | 0% | 40% | 24135m |
| 08:00 | 75% | 16% | 0% | 46% | 24135m |
| 09:00 | 59% | 20% | 0% | 51% | 24135m |
| 10:00 | 49% | 24% | 0% | 57% | 24135m |
| 11:00 | 52% | 36% | 0% | 49% | 24135m |
| 12:00 | 54% | 49% | 0% | 40% | 24135m |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Sun, May 24
Sunrise 04:48
Sunset 21:40 | |||||||||
| 14:00 | 995hPa | 53% | 3% | 0% | 69% | 54° | 74% | 6.6m/s | 3.7m/s |
| 15:00 | 995hPa | 7% | 5% | 0% | 62% | 49° | 31% | 7.5m/s | 4.9m/s |
| 16:00 | 995hPa | 31% | 5% | 0% | 60% | 43° | 31% | 7.8m/s | 5.5m/s |
| 17:00 | 995hPa | 5% | 5% | 0% | 61% | 36° | 31% | 7.8m/s | 5.6m/s |
| 18:00 | 996hPa | 5% | 4% | 0% | 67% | 27° | 40% | 7.8m/s | 5m/s |
| 19:00 | 995hPa | 6% | 4% | 0% | 73% | 19° | 14% | 7.3m/s | 4.6m/s |
| 20:00 | 995hPa | 4% | 3% | 0% | 79% | 11° | 5% | 7.3m/s | 3.3m/s |
| 21:00 | 996hPa | 1% | 4% | 0% | 88% | 3.9° | 5% | 2m/s | 2.1m/s |
| 22:00 ☾ | 996hPa | 0% | 2% | 0% | 92% | -2.6° | 4% | 1.6m/s | 1.7m/s |
| 23:00 ☾ | 996hPa | 0% | 4% | 0% | 93% | -7.8° | 5% | 1.3m/s | 1.4m/s |
| Mon, May 25
Sunrise 04:48
Sunset 21:40 | |||||||||
| 24:00 ☾ | 996hPa | 0% | 5% | 0% | 93% | -11° | 5% | 1.1m/s | 1.2m/s |
| 01:00 ☾ | 996hPa | 0% | 5% | 0% | 94% | -13° | 5% | 1.2m/s | 1.2m/s |
| 02:00 ☾ | 996hPa | 0% | 5% | 0% | 95% | -12° | 5% | 1.3m/s | 1.3m/s |
| 03:00 ☾ | 996hPa | 0% | 5% | 0% | 96% | -9.6° | 5% | 1.3m/s | 1.4m/s |
| 04:00 ☾ | 996hPa | 0% | 4% | 0% | 96% | -5.2° | 4% | 1.2m/s | 1.4m/s |
| 05:00 | 996hPa | 0% | 5% | 0% | 96% | 1° | 5% | 1.3m/s | 1.4m/s |
| 06:00 | 996hPa | 0% | 5% | 0% | 96% | 7.8° | 5% | 1.4m/s | 1.5m/s |
| 07:00 | 996hPa | 0% | 7% | 0% | 91% | 15° | 7% | 2.4m/s | 1.7m/s |
| 08:00 | 996hPa | 0% | 6% | 0% | 82% | 24° | 6% | 2.8m/s | 2m/s |
| 09:00 | 996hPa | 0% | 12% | 0% | 72% | 32° | 12% | 4.8m/s | 2.1m/s |
| 10:00 | 996hPa | 0% | 12% | 0% | 66% | 40° | 21% | 6.2m/s | 3.1m/s |
| 11:00 | 996hPa | 0% | 5% | 0% | 62% | 47° | 8% | 8m/s | 4.8m/s |
| 12:00 | 996hPa | 0% | 5% | 0% | 59% | 52° | 6% | 9.2m/s | 5.6m/s |
| 13:00 | 996hPa | 0% | 5% | 0% | 57% | 55° | 5% | 9.5m/s | 6.1m/s |
| 14:00 | 996hPa | 0% | 4% | 0% | 57% | 54° | 5% | 9.9m/s | 6.4m/s |
| 15:00 | 996hPa | 0% | 5% | 0% | 58% | 50° | 5% | 9.4m/s | 6.1m/s |
| 16:00 | 996hPa | 0% | 5% | 0% | 60% | 43° | 5% | 9.4m/s | 5.8m/s |
| 17:00 | 996hPa | 0% | 5% | 0% | 63% | 36° | 6% | 9.2m/s | 5.4m/s |
| 18:00 | 996hPa | 0% | 5% | 0% | 66% | 28° | 5% | 8.4m/s | 4.4m/s |
| 19:00 | 996hPa | 0% | 5% | 0% | 69% | 19° | 5% | 7.5m/s | 3m/s |
| 20:00 | 996hPa | 0% | 5% | 0% | 77% | 11° | 6% | 3.7m/s | 2.1m/s |
| 21:00 | 997hPa | 0% | 5% | 0% | 85% | 4° | 6% | 1.5m/s | 1.6m/s |
| 22:00 ☾ | 997hPa | 0% | 5% | 0% | 91% | -2.4° | 5% | 1.4m/s | 1.5m/s |
| 23:00 ☾ | 997hPa | 0% | 5% | 0% | 92% | -7.6° | 5% | 1.4m/s | 1.4m/s |
| Tue, May 26
Sunrise 04:46
Sunset 21:42 | |||||||||
| 24:00 ☾ | 997hPa | 3% | 5% | 0% | 94% | -11° | 5% | 1.5m/s | 1.6m/s |
| 01:00 ☾ | 997hPa | 5% | 5% | 0% | 95% | -13° | 5% | 1.7m/s | 1.8m/s |
| 02:00 ☾ | 997hPa | 5% | 5% | 0% | 95% | -12° | 5% | 1.7m/s | 1.9m/s |
| 03:00 ☾ | 997hPa | 5% | 5% | 0% | 95% | -9.4° | 5% | 1.8m/s | 1.9m/s |
| 04:00 ☾ | 997hPa | 5% | 5% | 0% | 94% | -5° | 11% | 1.7m/s | 1.9m/s |
| 05:00 | 996hPa | 5% | 5% | 0% | 93% | 1.2° | 55% | 1.8m/s | 1.9m/s |
| 06:00 | 997hPa | 5% | 5% | 0% | 88% | 7.9° | 22% | 1.9m/s | 1.8m/s |
| 07:00 | 997hPa | 5% | 15% | 0% | 82% | 16° | 40% | 2.2m/s | 1.6m/s |
| 08:00 | 997hPa | 5% | 14% | 0% | 71% | 24° | 79% | 1.5m/s | 1.2m/s |
| 09:00 | 997hPa | 6% | 11% | 0% | 67% | 32° | 69% | 1.6m/s | 1.2m/s |
| 10:00 | 997hPa | 5% | 18% | 0% | 60% | 40° | 88% | 1.7m/s | 1.3m/s |
| 11:00 | 997hPa | 5% | 5% | 0% | 58% | 47° | 47% | 1.6m/s | 0.96m/s |
| 12:00 | 997hPa | 6% | 5% | 0% | 54% | 52° | 14% | 1.7m/s | 0.65m/s |
| 13:00 | 997hPa | 6% | 5% | 0% | 52% | 55° | 15% | 1.8m/s | 0.73m/s |
| 14:00 | 997hPa | 5% | 5% | 0% | 51% | 54° | 8% | 1.9m/s | 0.82m/s |
| 15:00 | 997hPa | 5% | 5% | 0% | 50% | 50° | 20% | 1.8m/s | 0.63m/s |
| 16:00 | 996hPa | 5% | 5% | 0% | 51% | 44° | 19% | 1.7m/s | 0.59m/s |
| 17:00 | 996hPa | 13% | 5% | 0% | 52% | 36° | 43% | 1.2m/s | 0.76m/s |
| 18:00 | 996hPa | 66% | 5% | 0% | 64% | 28° | 88% | 2.6m/s | 3m/s |
| 19:00 | 997hPa | 5% | 5% | 0% | 84% | 19° | 56% | 3.7m/s | 3.1m/s |
| 20:00 | 1003hPa | 37% | 8% | 0% | 85% | 11° | 71% | 3.9m/s | 2.9m/s |
| 21:00 | 1010hPa | 68% | 10% | 0% | 86% | 4.2° | 85% | 4.2m/s | 2.6m/s |
| 22:00 ☾ | 1016hPa | 100% | 13% | 0% | 87% | -2.3° | 100% | 4.4m/s | 2.4m/s |
| 23:00 ☾ | 1016hPa | 78% | 9% | 0% | 84% | -7.5° | 78% | 4.5m/s | 2.4m/s |
| Wed, May 27
Sunrise 04:45
Sunset 21:43 | |||||||||
| 24:00 ☾ | 1016hPa | 57% | 4% | 0% | 81% | -11° | 57% | 4.6m/s | 2.5m/s |
| 01:00 ☾ | 1016hPa | 35% | 0% | 0% | 79% | -12° | 35% | 4.7m/s | 2.6m/s |
| 02:00 ☾ | 1016hPa | 31% | 0% | 2% | 75% | -12° | 31% | 4.4m/s | 2.8m/s |
| 03:00 ☾ | 1016hPa | 27% | 0% | 3% | 71% | -9.3° | 27% | 4.2m/s | 3m/s |
| 04:00 ☾ | 1016hPa | 22% | 0% | 5% | 67% | -4.9° | 22% | 3.9m/s | 3.1m/s |
| 05:00 | 1015hPa | 28% | 0% | 3% | 65% | 1.3° | 28% | 3.7m/s | 3.1m/s |
| 06:00 | 1015hPa | 34% | 0% | 2% | 64% | 8° | 34% | 3.4m/s | 3.2m/s |
| 07:00 | 1015hPa | 40% | 0% | 0% | 62% | 16° | 40% | 3.1m/s | 3.2m/s |
| 08:00 | 1015hPa | 46% | 0% | 3% | 63% | 24° | 46% | 3.2m/s | 3.2m/s |
| 09:00 | 1014hPa | 51% | 0% | 6% | 63% | 32° | 51% | 3.3m/s | 3.3m/s |
| 10:00 | 1014hPa | 57% | 0% | 9% | 64% | 40° | 57% | 3.3m/s | 3.4m/s |
| 11:00 | 1014hPa | 49% | 0% | 19% | 66% | 47° | 59% | 3.6m/s | 3.5m/s |
| 12:00 | 1013hPa | 40% | 0% | 29% | 70% | 53° | 61% | 4m/s | 3.6m/s |
| 13:00 | 1013hPa | 32% | 0% | 39% | 72% | 55° | 62% | 4.3m/s | 3.7m/s |
How to read: these inputs help produce the derived score; they are not requirements by themselves.
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