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Rule Fog Hunter

Dovedale - Fog Hunter - Peak District

Ashbourne, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread5.8°C
Visibility24134 (Clear)
Relative Humidity67%
Wind Speed5.8m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Moderate Fog
Dovedale
Mon, Apr 20 · 22:00–02:00 · 4h window
High confidence
70%
🌫️Fog Probability76.6-84.7%
Dewpoint Spread: 0.3°C
Visibility: 21644 (Clear)
Relative Humidity: 98%
Wind Speed: 4.0m/s (calm conditions)

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when temperature inversions create the valley fog and mist that make the Peak District one of England's premier locations for atmospheric landscape photography. We track dew point, temperature differentials, and wind conditions to predict when valleys fill with fog while higher ground remains clear.

The Peak District's topography creates ideal conditions for temperature inversions—cold air settles in valleys like the Hope Valley and Edale while summits like Mam Tor rise above the fog blanket. On still, clear nights, particularly in autumn and winter, the valleys fill with dense fog that glows at sunrise, transforming gritstone edges into dramatic islands floating above cloud seas.

What makes Peak District fog photography distinctive:

  • Mam Tor inversions - The Great Ridge rises dramatically above Hope Valley fog, creating spectacular dawn compositions with layered ridges disappearing into mist
  • Edale Valley blankets - Dense fog fills the valley below Kinder Scout, visible from multiple viewpoints along the edges
  • Dovedale mist - The limestone gorge channels morning mist that softens the valley's stepping stones and spires
  • Gritstone emergence - Stanage Edge, Curbar Edge, and Bamford Edge become dramatic foregrounds rising above valley fog

Mam Tor offers the Peak District's signature fog composition—standing on the summit at dawn with the Great Ridge extending ahead while Hope Valley lies hidden beneath fog creates an ethereal sea of cloud with ridge islands. The A625 Snake Pass viewpoint provides safe roadside access to photograph Ladybower Reservoir emerging from mist. Stanage Edge becomes even more dramatic when moorland fog swirls around its gritstone formations. Best conditions occur on clear autumn and winter nights following cold, still days—particularly September through February. The fog typically burns off by mid-morning, so arrive before sunrise to capture the best light illuminating the mist.

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72-hour requirements breakdown

What passed or failed, hour by hour
4matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Sat, Apr 18
05:0026%
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%
Sun, Apr 19
24:000%
01:000%
02:000%
03:0032%
04:0032%
05:0030%
06:0030%
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, Apr 20
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%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0077%
23:0081%
Tue, Apr 21
24:0085%
01:0077%
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
Sat, Apr 18 Sunrise 06:01 Sunset 20:11
14:00
64% 5.3°C 0mm 67% 0cm 47° 11°C 0.06mm 0.43kPa 24134m 7.7m/s 5.8m/s
15:00
46% 5.6°C 0mm 70% 0cm 42° 11°C 0.19mm 0.38kPa 22969m 8.4m/s 7.1m/s
16:00
27% 5.3°C 0mm 70% 0cm 36° 10°C 0.25mm 0.38kPa 24135m 8.5m/s 6.7m/s
17:00
34% 4.1°C 0mm 64% 0cm 28° 11°C 0.25mm 0.46kPa 24135m 9.1m/s 7.1m/s
18:00
41% 5.3°C 0mm 73% 0cm 19° 10°C 0.25mm 0.33kPa 24135m 8.7m/s 6.5m/s
19:00
48% 3.8°C 0mm 71% 0cm 9.8° 8.7°C 0.25mm 0.32kPa 24134m 9.3m/s 5.5m/s
20:00
64% 2.5°C 0mm 74% 0cm 1.3° 6.7°C 0mm 0.25kPa 24135m 9m/s 4.2m/s
21:00
79% 2.1°C 0mm 81% 0cm -7.3° 5.2°C 0mm 0.17kPa 24135m 9.4m/s 3.7m/s
22:00
95% 2.2°C 0mm 83% 0cm -15° 4.9°C 0mm 0.15kPa 24134m 11m/s 4.1m/s
23:00
96% 1.8°C 0mm 82% 0cm -20° 4.6°C 0mm 0.15kPa 24134m 12m/s 4.1m/s
Sun, Apr 19 Sunrise 06:01 Sunset 20:11
24:00
97% 1.4°C 0mm 81% 0cm -24° 4.4°C 0mm 0.16kPa 24135m 12m/s 4.4m/s
01:00
98% 1.2°C 0mm 82% 0cm -26° 4°C 0mm 0.14kPa 24135m 12m/s 4.2m/s
02:00
95% 1.3°C 0mm 88% 0cm -25° 3°C 0mm 0.09kPa 24135m 11m/s 3.6m/s
03:00
92% 1.4°C 0mm 93% 0cm -21° 2.4°C 0mm 0.05kPa 24135m 9.7m/s 3.4m/s
04:00
89% 1.3°C 0mm 94% 0cm -16° 2.3°C 0mm 0.05kPa 24135m 8.7m/s 3.5m/s
05:00
89% 1.3°C 0mm 94% 0cm -8.8° 2.2°C 0mm 0.05kPa 24135m 9.1m/s 3.5m/s
06:00
88% 1.4°C 0mm 94% 0cm -0.31° 2.2°C 0mm 0.04kPa 24134m 10m/s 3.7m/s
07:00
88% 1.9°C 0mm 92% 0cm 8.1° 3.1°C 0mm 0.06kPa 24134m 9.4m/s 3.3m/s
08:00
80% 2.9°C 0mm 83% 0cm 17° 5.7°C 0mm 0.16kPa 24135m 8.9m/s 3.6m/s
09:00
73% 2.2°C 0mm 69% 0cm 26° 7.5°C 0mm 0.32kPa 24134m 7.3m/s 4.6m/s
10:00
65% 1.7°C 0mm 62% 0cm 34° 8.6°C 0mm 0.43kPa 24134m 5.8m/s 4.5m/s
11:00
57% 1.2°C 0mm 56% 0cm 41° 9.5°C 0mm 0.52kPa 24134m 4.8m/s 3.8m/s
12:00
49% 1°C 0mm 53% 0cm 46° 10°C 0mm 0.59kPa 24135m 4.4m/s 3.5m/s
13:00
41% 1.2°C 0mm 51% 0cm 48° 11°C 0mm 0.64kPa 24134m 4.3m/s 3.5m/s
14:00
32% 1.4°C 0mm 50% 0cm 47° 11°C 0mm 0.68kPa 24135m 4.4m/s 3.7m/s
15:00
23% 1.6°C 0mm 50% 0cm 42° 12°C 0mm 0.7kPa 24135m 4.3m/s 3.7m/s
16:00
14% 1.7°C 0mm 50% 0cm 36° 12°C 0mm 0.69kPa 24134m 4.3m/s 3.9m/s
17:00
11% 2.2°C 0mm 52% 0cm 28° 12°C 0mm 0.65kPa 24134m 4m/s 4m/s
18:00
9% 4°C 0mm 62% 0cm 19° 11°C 0mm 0.5kPa 24134m 4.5m/s 4.1m/s
19:00
6% 3.9°C 0mm 70% 0cm 10° 9.2°C 0mm 0.35kPa 24134m 7.4m/s 4.5m/s
20:00
13% 3.1°C 0mm 78% 0cm 1.5° 6.8°C 0mm 0.22kPa 24134m 6m/s 3.6m/s
21:00
21% 2.8°C 0mm 83% 0cm -7.1° 5.6°C 0mm 0.16kPa 24134m 6.8m/s 3.7m/s
22:00
28% 3°C 0mm 83% 0cm -14° 5.7°C 0mm 0.16kPa 24135m 8.7m/s 4.4m/s
23:00
28% 2.4°C 0mm 84% 0cm -20° 4.9°C 0mm 0.14kPa 24134m 7m/s 2.8m/s
Mon, Apr 20 Sunrise 05:59 Sunset 20:13
24:00
29% 2.1°C 0mm 79% 0cm -24° 5.5°C 0mm 0.19kPa 24135m 5.6m/s 2.5m/s
01:00
29% 1.9°C 0mm 78% 0cm -26° 5.5°C 0mm 0.2kPa 24134m 4.4m/s 2m/s
02:00
40% 1.7°C 0mm 79% 0cm -24° 5°C 0mm 0.18kPa 24135m 1.8m/s 1.4m/s
03:00
51% 1.2°C 0mm 84% 0cm -21° 3.6°C 0mm 0.12kPa 24135m 0.91m/s 0.85m/s
04:00
62% 1°C 0mm 85% 0cm -16° 3.2°C 0mm 0.11kPa 24134m 1.2m/s 1.2m/s
05:00
61% 1°C 0mm 84% 0cm -8.5° 3.3°C 0mm 0.12kPa 24135m 1.5m/s 1.5m/s
06:00
59% 0.8°C 0mm 82% 0cm 0.11° 3.6°C 0mm 0.14kPa 24134m 1.7m/s 1.8m/s
07:00
58% 1.5°C 0mm 82% 0cm 8.4° 4.2°C 0mm 0.15kPa 24134m 2m/s 1.8m/s
08:00
55% 2.6°C 0mm 78% 0cm 17° 6.2°C 0mm 0.21kPa 24134m 2.3m/s 1.6m/s
09:00
52% 3.3°C 0mm 73% 0cm 26° 7.9°C 0mm 0.29kPa 24135m 2.7m/s 1.7m/s
10:00
49% 3.1°C 0mm 66% 0cm 35° 9°C 0.06mm 0.38kPa 24135m 2.8m/s 2.1m/s
11:00
42% 2.9°C 0.01mm 61% 0cm 42° 10°C 0.19mm 0.47kPa 24134m 3.2m/s 2.3m/s
12:00
35% 2.9°C 0mm 63% 0cm 47° 9.6°C 0.25mm 0.44kPa 24134m 3.3m/s 2.7m/s
13:00
28% 3.7°C 0mm 69% 0cm 49° 9.1°C 0.44mm 0.36kPa 24135m 4.1m/s 3.9m/s
14:00
19% 4.6°C 0mm 74% 0cm 47° 8.9°C 0.25mm 0.29kPa 23752m 4.5m/s 4.2m/s
15:00
9% 4.4°C 0mm 69% 0cm 43° 9.8°C 0.38mm 0.37kPa 23891m 4m/s 3.3m/s
16:00
0% 4°C 0mm 64% 0cm 36° 10°C 0.56mm 0.45kPa 18266m 4.1m/s 3.5m/s
17:00
0% 4.6°C 0mm 71% 0cm 28° 9.5°C 0.81mm 0.34kPa 23054m 5.2m/s 5.2m/s
18:00
1% 5.1°C 0mm 78% 0cm 19° 8.7°C 0.94mm 0.25kPa 24108m 6m/s 4.5m/s
19:00
1% 5°C 0mm 80% 0cm 10° 8.2°C 1.1mm 0.22kPa 23666m 7.5m/s 4.5m/s
20:00
13% 4.2°C 0mm 86% 0cm 1.7° 6.3°C 0.71mm 0.13kPa 23822m 7.5m/s 4.1m/s
21:00
26% 3.2°C 0mm 92% 0cm -6.8° 4.4°C 0.35mm 0.07kPa 23979m 7.5m/s 3.7m/s
22:00
38% 2.2°C 0mm 98% 0cm -14° 2.6°C 0mm 0.02kPa 24135m 7.4m/s 3.3m/s
23:00
40% 2.6°C 0mm 98% 0cm -20° 2.9°C 0mm 0.02kPa 22890m 8.1m/s 3.6m/s
Tue, Apr 21 Sunrise 05:57 Sunset 20:15
24:00
41% 2.9°C 0mm 98% 0cm -24° 3.2°C 0mm 0.01kPa 21644m 8.8m/s 4m/s
01:00
43% 3.3°C 0mm 98% 0cm -25° 3.5°C 0mm 0.01kPa 20399m 9.5m/s 4.4m/s
02:00
41% 3.7°C 0mm 90% 0cm -24° 5.3°C 0.02mm 0.09kPa 21644m 9.4m/s 5.2m/s
03:00
39% 4°C 0mm 81% 0cm -21° 7°C 0.04mm 0.19kPa 22889m 9.2m/s 6.1m/s
04:00
37% 4.1°C 0mm 73% 0cm -15° 8.8°C 0.06mm 0.31kPa 24135m 9.1m/s 7m/s
05:00
30% 3.6°C 0mm 67% 0cm -8.2° 9.4°C 0.06mm 0.39kPa 24135m 9.4m/s 7.5m/s
06:00
23% 2.9°C 0mm 61% 0cm 0.37° 10°C 0.06mm 0.48kPa 24135m 9.6m/s 7.9m/s
07:00
16% 2.1°C 0mm 56% 0cm 8.7° 11°C 0.06mm 0.57kPa 24135m 9.9m/s 8.3m/s
08:00
12% 2.3°C 0mm 57% 0cm 18° 11°C 0.04mm 0.55kPa 24135m 10m/s 8.5m/s
09:00
8% 2.5°C 0mm 58% 0cm 27° 10°C 0.02mm 0.53kPa 24135m 10m/s 8.7m/s
10:00
4% 2.7°C 0mm 59% 0cm 35° 10°C 0mm 0.51kPa 24135m 11m/s 8.9m/s
11:00
4% 2.2°C 0mm 61% 0cm 42° 9.3°C 0mm 0.45kPa 24135m 11m/s 8.5m/s
12:00
3% 1.8°C 0mm 63% 0cm 47° 8.3°C 0mm 0.4kPa 24135m 12m/s 8.1m/s
13:00
3% 1.3°C 0mm 65% 0cm 49° 7.3°C 0mm 0.35kPa 24135m 13m/s 7.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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