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Rule Fog Hunter

Balmaha - Fog Hunter - Trossachs & Loch Lomond

Balmaha, Scotland, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread3.6°C
Visibility24135 (Clear)
Relative Humidity78%
Wind Speed3.9m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Moderate Fog at Dusk
Balmaha
Wed, Apr 15 · 21:00–22:00 · 1h window
Medium confidence
40%
🌫️Fog Probability74.6%
Dewpoint Spread: 0.4°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 1.1m/s (calm conditions)
fog weather icon
Moderate Fog
Balmaha
Wed, Apr 15 · 22:00–24:00
🌫️Fog Probability:62.7-74.6%
Low

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
1matching hours in the next 92 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Wed, Apr 8
05:0044%
06:0049%
07:0054%
08:0080%
09:0047%
10:000%
11:000%
12:000%
13:000%
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21:0039%
22:0039%
23:0057%
Thu, Apr 9
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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Fri, Apr 10
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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23:000%
Sat, Apr 11
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
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20:000%
21:000%
22:000%
23:000%
Sun, Apr 12
24:000%
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
Thu, Apr 9 Sunrise 06:28 Sunset 20:12
03:00 ☾
0% 5.1°C 0.01mm 78% 0cm -23° 8.7°C 0mm 0.25kPa 24135m 9.5m/s 3.9m/s
04:00 ☾
0% 5.7°C 0.54mm 84% 0cm -18° 8.2°C 0.13mm 0.17kPa 17171m 9.2m/s 3.5m/s
05:00 ☾
0% 6.6°C 2.8mm 94% 0cm -12° 7.5°C 1.8mm 0.06kPa 5115m 9.5m/s 3.6m/s
06:00 ☾
0% 6.6°C 2.9mm 97% 0cm -4.5° 7°C 5.3mm 0.03kPa 3618m 7.1m/s 2.9m/s
07:00
0% 6.7°C 0.7mm 98% 0cm 3.8° 7°C 6.1mm 0.02kPa 744m 8.3m/s 3.5m/s
08:00
0% 6.8°C 1.3mm 98% 0cm 12° 7.1°C 1.1mm 0.02kPa 514m 9.5m/s 3.8m/s
09:00
0% 4.1°C 0.59mm 91% 0cm 20° 5.5°C 2.2mm 0.08kPa 13149m 12m/s 6.3m/s
10:00
0% 4.2°C 0.01mm 90% 0cm 28° 5.7°C 2.4mm 0.09kPa 24134m 10m/s 5.2m/s
11:00
0% 3.7°C 0mm 86% 0cm 34° 5.8°C 2.6mm 0.13kPa 24135m 10m/s 5.4m/s
12:00
0% 2.8°C 0mm 77% 0cm 39° 6.5°C 2.8mm 0.22kPa 22785m 11m/s 6.3m/s
13:00
0% 1.4°C 0mm 66% 0cm 41° 7.5°C 2.9mm 0.36kPa 24135m 12m/s 6.8m/s
14:00
7% 1°C 0mm 63% 0cm 41° 7.6°C 0.06mm 0.39kPa 24135m 12m/s 8.3m/s
15:00
15% 0.4°C 0mm 60% 0cm 38° 7.7°C 0.13mm 0.42kPa 24134m 13m/s 8.3m/s
16:00
22% 1.2°C 0mm 65% 0cm 32° 7.4°C 0.25mm 0.36kPa 23370m 14m/s 8.3m/s
17:00
20% 3.4°C 0.01mm 82% 0cm 25° 6.2°C 0.44mm 0.17kPa 9837m 13m/s 8.3m/s
18:00
17% 2.6°C 0.02mm 85% 0cm 18° 4.9°C 0.63mm 0.13kPa 19303m 14m/s 7.1m/s
19:00
15% 3.2°C 0.46mm 93% 0cm 9.3° 4.2°C 1.1mm 0.06kPa 291m 14m/s 7m/s
20:00
16% 3.1°C 0.01mm 92% 0cm 1.3° 4.2°C 0.38mm 0.06kPa 20103m 13m/s 6m/s
21:00 ☾
18% 2.3°C 0mm 88% 0cm -6.9° 4.1°C 0.44mm 0.1kPa 24134m 12m/s 6m/s
22:00 ☾
19% 1.6°C 0mm 85% 0cm -14° 3.9°C 0.5mm 0.12kPa 24134m 11m/s 5.6m/s
23:00 ☾
20% 0.9°C 0mm 84% 0cm -20° 3.4°C 0.5mm 0.13kPa 24135m 11m/s 4.5m/s
Fri, Apr 10 Sunrise 06:28 Sunset 20:12
24:00 ☾
21% 0.2°C 0.01mm 82% 0cm -24° 3°C 0.5mm 0.14kPa 24134m 11m/s 4.5m/s
01:00 ☾
22% -0.6°C 0mm 82% 0cm -26° 2.1°C 0.5mm 0.13kPa 24135m 10m/s 3.6m/s
02:00 ☾
46% -1.1°C 0mm 86% 0cm -25° 1.1°C 0mm 0.1kPa 24134m 4.9m/s 2.4m/s
03:00 ☾
70% -1.3°C 0mm 87% 0cm -23° 0.59°C 0mm 0.08kPa 24134m 4.3m/s 2.1m/s
04:00 ☾
94% -1.6°C 0mm 87% 0cm -18° 0.32°C 0mm 0.08kPa 24135m 1.9m/s 1.8m/s
05:00 ☾
94% -1.8°C 0mm 87% 0cm -12° 0.05°C 0mm 0.08kPa 24134m 1.4m/s 1.5m/s
06:00 ☾
94% -1.9°C 0mm 88% 0cm -4.1° -0.13°C 0mm 0.07kPa 24134m 1.3m/s 1.4m/s
07:00
94% -1.6°C 0mm 87% 0cm 4.1° 0.29°C 0mm 0.08kPa 24135m 1m/s 1.1m/s
08:00
79% -0.6°C 0mm 82% 0cm 12° 2.1°C 0mm 0.13kPa 24134m 2.2m/s 0.99m/s
09:00
65% 0.1°C 0mm 75% 0cm 21° 4.1°C 0mm 0.21kPa 24134m 3m/s 1.5m/s
10:00
50% 0.1°C 0.01mm 70% 0cm 28° 5.1°C 0mm 0.26kPa 24135m 3.6m/s 2.7m/s
11:00
41% -0.1°C 0mm 65% 0cm 35° 5.9°C 0.13mm 0.32kPa 24135m 4.3m/s 3.7m/s
12:00
33% -0.7°C 0mm 61% 0cm 39° 6.1°C 0.25mm 0.36kPa 24134m 5.4m/s 4.4m/s
13:00
24% -1.6°C 0mm 54% 0cm 42° 7°C 0.31mm 0.46kPa 24134m 6.2m/s 4.4m/s
14:00
16% -2°C 0mm 51% 0cm 41° 7.6°C 0.06mm 0.51kPa 24134m 6.9m/s 4.6m/s
15:00
9% -1.9°C 0mm 52% 0cm 38° 7.3°C 0.06mm 0.49kPa 24134m 7.9m/s 4.9m/s
16:00
1% -1.9°C 0mm 51% 0cm 33° 7.6°C 0.06mm 0.51kPa 24134m 9.6m/s 6.7m/s
17:00
1% -1.1°C 0mm 54% 0cm 26° 7.5°C 0.06mm 0.47kPa 24134m 11m/s 6.7m/s
18:00
0% -1.7°C 0mm 56% 0cm 18° 6.5°C 0.06mm 0.42kPa 24135m 12m/s 6.7m/s
19:00
0% -1.3°C 0mm 61% 0cm 9.6° 5.6°C 0.06mm 0.35kPa 24135m 14m/s 6.8m/s
20:00
0% -1°C 0mm 66% 0cm 1.5° 5°C 0mm 0.3kPa 24135m 14m/s 6.6m/s
21:00 ☾
0% -0.2°C 0mm 69% 0cm -6.7° 5°C 0mm 0.27kPa 24134m 14m/s 6.2m/s
22:00 ☾
0% 0.2°C 0.03mm 74% 0cm -14° 4.4°C 0mm 0.22kPa 24135m 14m/s 6.4m/s
23:00 ☾
0% 1.4°C 0.16mm 83% 0cm -20° 4.1°C 0.31mm 0.14kPa 19978m 16m/s 6.4m/s
Sat, Apr 11 Sunrise 06:25 Sunset 20:14
24:00 ☾
0% 1.6°C 0.01mm 84% 0cm -24° 4.1°C 0.38mm 0.13kPa 24135m 16m/s 7m/s
01:00 ☾
0% 2.2°C 0.67mm 89% 0cm -26° 3.8°C 0.63mm 0.09kPa 11616m 16m/s 7.1m/s
02:00 ☾
0% 2.3°C 0.56mm 94% 0cm -25° 3.3°C 0.88mm 0.05kPa 14412m 19m/s 7.3m/s
03:00 ☾
0% 3.1°C 2.5mm 95% 0cm -22° 3.8°C 1.7mm 0.04kPa 3360m 20m/s 7.6m/s
04:00 ☾
0% 2.4°C 0.4mm 97% 0cm -18° 2.9°C 4.8mm 0.02kPa 128m 12m/s 6.3m/s
05:00 ☾
0% 1.5°C 0mm 92% 0.04cm -11° 2.7°C 4.9mm 0.06kPa 19233m 13m/s 6.7m/s
06:00 ☾
0% 0.7°C 0mm 86% 0cm -3.8° 2.8°C 4.9mm 0.1kPa 24135m 12m/s 6.1m/s
07:00
0% 0.5°C 0mm 87% 0cm 4.4° 2.4°C 4.9mm 0.09kPa 24135m 13m/s 5.7m/s
08:00
0% -0.1°C 0mm 74% 0cm 13° 4.1°C 3.3mm 0.21kPa 24135m 12m/s 6.4m/s
09:00
0% -1.1°C 0mm 61% 0cm 21° 5.8°C 1.6mm 0.36kPa 24135m 12m/s 7.1m/s
10:00
0% -2.8°C 0mm 48% 0cm 29° 7.5°C 0mm 0.54kPa 24135m 12m/s 7.8m/s
11:00
0% -1.3°C 0mm 56% 0cm 35° 6.8°C 0.04mm 0.43kPa 24135m 13m/s 7.7m/s
12:00
1% -0.1°C 0mm 64% 0cm 40° 6.1°C 0.08mm 0.34kPa 24135m 14m/s 7.6m/s
13:00
1% 0.8°C 0mm 72% 0cm 42° 5.4°C 0.13mm 0.25kPa 24135m 15m/s 7.5m/s
14:00
9% 1.5°C 0.13mm 79% 0cm 42° 4.9°C 0.27mm 0.18kPa 21986m 15m/s 7.2m/s
15:00
18% 2.2°C 0.26mm 86% 0cm 38° 4.3°C 0.42mm 0.12kPa 19836m 15m/s 6.8m/s
16:00
26% 2.7°C 0.39mm 92% 0cm 33° 3.8°C 0.56mm 0.06kPa 17686m 15m/s 6.5m/s
17:00
18% 2.9°C 0.26mm 90% 0cm 26° 4.5°C 0.94mm 0.09kPa 17609m 15m/s 6.7m/s
18:00
11% 3.2°C 0.14mm 87% 0cm 18° 5.1°C 1.3mm 0.11kPa 17532m 15m/s 7m/s
19:00
3% 3.4°C 0.01mm 84% 0cm 9.8° 5.8°C 1.7mm 0.14kPa 17454m 15m/s 7.2m/s
20:00
7% 3.5°C 0.05mm 86% 0cm 1.8° 5.7°C 1.7mm 0.13kPa 19074m 15m/s 7.3m/s
21:00 ☾
12% 3.6°C 0.1mm 87% 0cm -6.4° 5.6°C 1.8mm 0.12kPa 20694m 15m/s 7.5m/s
22:00 ☾
16% 3.7°C 0.14mm 88% 0cm -13° 5.5°C 1.8mm 0.11kPa 22313m 16m/s 7.6m/s
23:00 ☾
13% 3.1°C 0.74mm 89% 0cm -19° 4.7°C 2.1mm 0.09kPa 16575m 16m/s 7.8m/s
Sun, Apr 12 Sunrise 06:23 Sunset 20:16
24:00 ☾
10% 2.5°C 1.3mm 90% 0cm -23° 3.9°C 2.4mm 0.08kPa 10836m 16m/s 8m/s
01:00 ☾
7% 1.9°C 1.9mm 92% 0cm -25° 3.1°C 2.7mm 0.06kPa 5098m 16m/s 8.2m/s
02:00 ☾
7% 2.6°C 1.4mm 93% 0cm -25° 3.7°C 2.9mm 0.06kPa 6624m 15m/s 8.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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