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Rule Fog Hunter

The Trossachs Pier - Fog Hunter - Trossachs & Loch Lomond

Callander, Scotland, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread5.7°C
Visibility24135 (Clear)
Relative Humidity69%
Wind Speed3.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when fog and mist conditions create atmospheric photography opportunities across the Trossachs lochs and glens. We track temperature, humidity, wind, and overnight cooling to predict when dawn mist will form over forest-fringed lochs and settle into wooded valleys.

The Trossachs—"the Highlands in miniature"—sits where Lowland Scotland meets the Highlands, creating perfect conditions for mist formation. Cool Highland air draining down valleys meets warmer air over the lochs, while dense oak and birch forests trap moisture overnight. The result is frequent dawn mist that transforms intimate lochs and wooded glens into scenes of ethereal beauty.

What makes the Trossachs special for fog photography:

  • Forest-fringed lochs - Loch Ard and Loch Chon with native woodland creating layered mist scenes
  • Valley fog formation - Glen Finglas and other glens trap overnight mist between mountains
  • Intimate scale - Smaller lochs allow compositions that capture both mist and reflections
  • Seasonal reliability - Autumn (September-November) brings most reliable mist conditions with calm nights

Loch Ard near Aberfoyle offers the Trossachs' most reliable dawn mist—native forest comes right to the water's edge, creating layered compositions as mist rises through trees. The forest pier at dawn with mist swirling around ancient oaks is magical. Loch Chon, deeper into the forest, sees even more atmospheric conditions due to its remote, sheltered position. The Trossachs Pier on Loch Katrine with the historic steamship and Ben Venue emerging from mist creates classic Scottish landscape scenes. Timing is critical—arrive in darkness, position yourself 30 minutes before sunrise, and capture the 1-2 hour window as mist lifts and breaks. Conditions change rapidly once sun hits the water.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Sun, May 24
05:0055%
06:0055%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Mon, May 25
24:000%
01:000%
02:0055%
03:0055%
04:0055%
05:0055%
06:0055%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, May 26
24:000%
01:000%
02:0055%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, May 27
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog Probability 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
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Sun, May 24 Sunrise 04:48 Sunset 21:40
14:00
0% 11°C 0mm 69% 0cm 54° 16°C 0mm 0.58kPa 24135m 6.6m/s 3.7m/s
15:00
1% 10°C 0mm 62% 0cm 49° 18°C 0mm 0.75kPa 24135m 7.5m/s 4.9m/s
16:00
1% 10°C 0mm 60% 0cm 43° 18°C 0mm 0.82kPa 24134m 7.8m/s 5.5m/s
17:00
2% 11°C 0mm 61% 0cm 36° 18°C 0.06mm 0.8kPa 24134m 7.8m/s 5.6m/s
18:00
4% 12°C 0mm 67% 0cm 27° 18°C 0.06mm 0.66kPa 24134m 7.8m/s 5m/s
19:00
5% 12°C 0mm 73% 0cm 19° 17°C 0.06mm 0.51kPa 24134m 7.3m/s 4.6m/s
20:00
22% 12°C 0.01mm 79% 0cm 11° 15°C 0mm 0.36kPa 24135m 7.3m/s 3.3m/s
21:00
40% 11°C 0mm 88% 0cm 3.9° 13°C 0mm 0.18kPa 24134m 2m/s 2.1m/s
22:00 ☾
57% 10°C 0mm 92% 0cm -2.6° 11°C 0mm 0.1kPa 24135m 1.6m/s 1.7m/s
23:00 ☾
57% 9.5°C 0mm 93% 0cm -7.8° 11°C 0mm 0.09kPa 24134m 1.3m/s 1.4m/s
Mon, May 25 Sunrise 04:48 Sunset 21:40
24:00 ☾
56% 9°C 0mm 93% 0cm -11° 10°C 0mm 0.08kPa 24135m 1.1m/s 1.2m/s
01:00 ☾
56% 8.7°C 0mm 94% 0cm -13° 9.6°C 0mm 0.07kPa 24135m 1.2m/s 1.2m/s
02:00 ☾
71% 8.4°C 0mm 95% 0cm -12° 9.2°C 0mm 0.06kPa 24135m 1.3m/s 1.3m/s
03:00 ☾
85% 8.2°C 0mm 96% 0cm -9.6° 8.9°C 0mm 0.05kPa 24135m 1.3m/s 1.4m/s
04:00 ☾
100% 8°C 0mm 96% 0cm -5.2° 8.5°C 0mm 0.04kPa 24135m 1.2m/s 1.4m/s
05:00
100% 7.8°C 0mm 96% 0cm 1° 8.3°C 0mm 0.04kPa 24134m 1.3m/s 1.4m/s
06:00
99% 8.5°C 0mm 96% 0cm 7.8° 9.1°C 0mm 0.04kPa 24134m 1.4m/s 1.5m/s
07:00
99% 9.7°C 0mm 91% 0cm 15° 11°C 0mm 0.12kPa 24134m 2.4m/s 1.7m/s
08:00
98% 10°C 0mm 82% 0cm 24° 13°C 0mm 0.27kPa 24135m 2.8m/s 2m/s
09:00
96% 10°C 0mm 72% 0cm 32° 15°C 0mm 0.49kPa 24134m 4.8m/s 2.1m/s
10:00
95% 10°C 0mm 66% 0cm 40° 17°C 0mm 0.64kPa 24135m 6.2m/s 3.1m/s
11:00
92% 10°C 0mm 62% 0cm 47° 18°C 0mm 0.77kPa 24135m 8m/s 4.8m/s
12:00
88% 11°C 0mm 59% 0cm 52° 19°C 0mm 0.89kPa 24134m 9.2m/s 5.6m/s
13:00
85% 11°C 0mm 57% 0cm 55° 19°C 0mm 0.96kPa 24135m 9.5m/s 6.1m/s
14:00
83% 11°C 0mm 57% 0cm 54° 19°C 0mm 0.96kPa 24134m 9.9m/s 6.4m/s
15:00
80% 11°C 0mm 58% 0cm 50° 19°C 0mm 0.93kPa 24134m 9.4m/s 6.1m/s
16:00
78% 11°C 0mm 60% 0cm 43° 19°C 0mm 0.87kPa 24134m 9.4m/s 5.8m/s
17:00
78% 11°C 0mm 63% 0cm 36° 18°C 0mm 0.78kPa 24134m 9.2m/s 5.4m/s
18:00
78% 11°C 0mm 66% 0cm 28° 18°C 0mm 0.68kPa 24135m 8.4m/s 4.4m/s
19:00
78% 11°C 0mm 69% 0cm 19° 17°C 0mm 0.6kPa 24134m 7.5m/s 3m/s
20:00
85% 12°C 0mm 77% 0cm 11° 16°C 0mm 0.43kPa 24135m 3.7m/s 2.1m/s
21:00
91% 12°C 0mm 85% 0cm 4° 14°C 0mm 0.24kPa 24134m 1.5m/s 1.6m/s
22:00 ☾
98% 11°C 0mm 91% 0cm -2.4° 12°C 0mm 0.13kPa 24135m 1.4m/s 1.5m/s
23:00 ☾
96% 10°C 0mm 92% 0cm -7.6° 11°C 0mm 0.1kPa 24134m 1.4m/s 1.4m/s
Tue, May 26 Sunrise 04:46 Sunset 21:42
24:00 ☾
95% 9.9°C 0mm 94% 0cm -11° 11°C 0mm 0.08kPa 24134m 1.5m/s 1.6m/s
01:00 ☾
93% 9.6°C 0mm 95% 0cm -13° 10°C 0mm 0.07kPa 24135m 1.7m/s 1.8m/s
02:00 ☾
88% 9.3°C 0mm 95% 0cm -12° 10°C 0mm 0.06kPa 24134m 1.7m/s 1.9m/s
03:00 ☾
82% 8.9°C 0mm 95% 0cm -9.4° 9.7°C 0mm 0.06kPa 24135m 1.8m/s 1.9m/s
04:00 ☾
77% 8.3°C 0mm 94% 0cm -5° 9.2°C 0mm 0.07kPa 24134m 1.7m/s 1.9m/s
05:00
79% 8°C 0mm 93% 0cm 1.2° 9.1°C 0mm 0.09kPa 24134m 1.8m/s 1.9m/s
06:00
82% 8.5°C 0mm 88% 0cm 7.9° 10°C 0mm 0.15kPa 24134m 1.9m/s 1.8m/s
07:00
84% 9.2°C 0mm 82% 0cm 16° 12°C 0mm 0.26kPa 24135m 2.2m/s 1.6m/s
08:00
82% 9°C 0mm 71% 0cm 24° 14°C 0mm 0.46kPa 24134m 1.5m/s 1.2m/s
09:00
81% 8.9°C 0mm 67% 0cm 32° 15°C 0mm 0.55kPa 24135m 1.6m/s 1.2m/s
10:00
79% 8.6°C 0mm 60% 0cm 40° 16°C 0mm 0.74kPa 24134m 1.7m/s 1.3m/s
11:00
77% 8.9°C 0mm 58% 0cm 47° 17°C 0mm 0.82kPa 24135m 1.6m/s 0.96m/s
12:00
74% 9.6°C 0mm 54% 0cm 52° 19°C 0mm 1kPa 24134m 1.7m/s 0.65m/s
13:00
72% 10°C 0mm 52% 0cm 55° 21°C 0mm 1.2kPa 24134m 1.8m/s 0.73m/s
14:00
66% 11°C 0mm 51% 0cm 54° 21°C 0mm 1.2kPa 24134m 1.9m/s 0.82m/s
15:00
60% 11°C 0mm 50% 0cm 50° 22°C 0mm 1.3kPa 24135m 1.8m/s 0.63m/s
16:00
54% 11°C 0mm 51% 0cm 44° 22°C 0mm 1.3kPa 24135m 1.7m/s 0.59m/s
17:00
53% 11°C 0mm 52% 0cm 36° 21°C 0mm 1.2kPa 24134m 1.2m/s 0.76m/s
18:00
53% 13°C 0mm 64% 0cm 28° 20°C 0mm 0.83kPa 24135m 2.6m/s 3m/s
19:00
52% 13°C 0.01mm 84% 0cm 19° 16°C 0.06mm 0.3kPa 24134m 3.7m/s 3.1m/s
20:00
47% 11°C 0.007mm 85% 0cm 11° 13°C 0.04mm 0.23kPa 24134m 3.9m/s 2.9m/s
21:00
41% 8.2°C 0.003mm 86% 0cm 4.2° 10°C 0.02mm 0.18kPa 24135m 4.2m/s 2.6m/s
22:00 ☾
36% 5.6°C 0mm 87% 0cm -2.3° 7.6°C 0mm 0.14kPa 24135m 4.4m/s 2.4m/s
23:00 ☾
28% 5.8°C 0mm 84% 0cm -7.5° 8.3°C 0mm 0.17kPa 24135m 4.5m/s 2.4m/s
Wed, May 27 Sunrise 04:45 Sunset 21:43
24:00 ☾
19% 5.9°C 0mm 81% 0cm -11° 8.9°C 0mm 0.21kPa 24135m 4.6m/s 2.5m/s
01:00 ☾
11% 6.1°C 0mm 79% 0cm -12° 9.6°C 0mm 0.25kPa 24135m 4.7m/s 2.6m/s
02:00 ☾
11% 6.8°C 0mm 75% 0cm -12° 11°C 0mm 0.33kPa 24135m 4.4m/s 2.8m/s
03:00 ☾
11% 7.5°C 0mm 71% 0cm -9.3° 13°C 0mm 0.42kPa 24135m 4.2m/s 3m/s
04:00 ☾
11% 8.2°C 0mm 67% 0cm -4.9° 14°C 0mm 0.53kPa 24135m 3.9m/s 3.1m/s
05:00
10% 8.9°C 0mm 65% 0cm 1.3° 15°C 0mm 0.6kPa 24135m 3.7m/s 3.1m/s
06:00
10% 9.7°C 0mm 64% 0cm 8° 17°C 0mm 0.68kPa 24135m 3.4m/s 3.2m/s
07:00
9% 11°C 0mm 62% 0cm 16° 18°C 0mm 0.77kPa 24135m 3.1m/s 3.2m/s
08:00
13% 11°C 0mm 63% 0cm 24° 18°C 0mm 0.78kPa 24135m 3.2m/s 3.2m/s
09:00
17% 12°C 0mm 63% 0cm 32° 19°C 0mm 0.8kPa 24135m 3.3m/s 3.3m/s
10:00
21% 12°C 0mm 64% 0cm 40° 19°C 0mm 0.81kPa 24135m 3.3m/s 3.4m/s
11:00
21% 12°C 0mm 66% 0cm 47° 19°C 0mm 0.71kPa 24135m 3.6m/s 3.5m/s
12:00
20% 12°C 0mm 70% 0cm 53° 18°C 0mm 0.63kPa 24135m 4m/s 3.6m/s
13:00
20% 12°C 0mm 72% 0cm 55° 17°C 0mm 0.54kPa 24135m 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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