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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 Spread5.4°C
Visibility24134 (Clear)
Relative Humidity70%
Wind Speed3.8m/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
Dovedale
Tue, Apr 7 · 22:00–23:00 · 1h window
Medium confidence
40%
🌫️Fog Probability74.6%
Dewpoint Spread: 0.5°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 3.3m/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
0matching hours in the next 79 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Wed, Apr 1
06:000%
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Thu, Apr 2
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Fri, Apr 3
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Sat, Apr 4
24:000%
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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
Wed, Apr 1 Sunrise 06:41 Sunset 19:41
14:00
0% 5.7°C 0mm 70% 0cm 41° 11°C 0mm 0.4kPa 24134m 5.3m/s 3.8m/s
15:00
0% 5.8°C 0mm 71% 0cm 37° 11°C 0mm 0.38kPa 24135m 5.8m/s 4.1m/s
16:00
0% 5.9°C 0mm 69% 0cm 31° 11°C 0mm 0.42kPa 24134m 5.7m/s 4.5m/s
17:00
0% 6.5°C 0mm 70% 0cm 23° 12°C 0mm 0.41kPa 24134m 6.2m/s 4.5m/s
18:00
0% 7.4°C 0mm 77% 0cm 14° 11°C 0mm 0.3kPa 24134m 6.2m/s 3.1m/s
19:00
0% 7.5°C 0mm 81% 0cm 5.6° 11°C 0mm 0.24kPa 24134m 6.7m/s 3m/s
20:00
0% 6.6°C 0mm 80% 0cm -3.4° 9.9°C 0mm 0.24kPa 24135m 8.6m/s 3.5m/s
21:00
0% 6.4°C 0.08mm 81% 0cm -12° 9.4°C 0.06mm 0.22kPa 24134m 11m/s 5.6m/s
22:00
0% 6.8°C 0mm 90% 0cm -20° 8.4°C 0.06mm 0.11kPa 24135m 11m/s 5.8m/s
23:00
0% 5.2°C 0mm 88% 0cm -26° 7°C 0.13mm 0.12kPa 24134m 10m/s 6.4m/s
Thu, Apr 2 Sunrise 06:41 Sunset 19:41
24:00
1% 3.2°C 0mm 88% 0cm -30° 5°C 0.13mm 0.1kPa 24134m 12m/s 6.5m/s
01:00
1% 2.3°C 0mm 87% 0cm -32° 4.4°C 0.13mm 0.11kPa 24134m 12m/s 7.2m/s
02:00
26% 1.9°C 0mm 81% 0cm -31° 4.8°C 0mm 0.16kPa 24135m 10m/s 7m/s
03:00
52% 1.8°C 0mm 78% 0cm -28° 5.2°C 0mm 0.19kPa 24134m 7.1m/s 4.6m/s
04:00
77% 2.2°C 0.01mm 81% 0cm -22° 5.1°C 0mm 0.16kPa 24134m 4.9m/s 2.5m/s
05:00
64% 2.5°C 0mm 82% 0cm -15° 5.2°C 0mm 0.15kPa 24134m 3m/s 1.7m/s
06:00
51% 2.3°C 0mm 83% 0cm -6.4° 5°C 0mm 0.15kPa 24135m 2m/s 1.3m/s
07:00
38% 2.1°C 0mm 83% 0cm 2.6° 4.7°C 0mm 0.15kPa 24135m 2m/s 1.6m/s
08:00
30% 1.9°C 0mm 81% 0cm 11° 4.8°C 0mm 0.16kPa 24134m 1.1m/s 1.3m/s
09:00
21% 2°C 0mm 80% 0cm 20° 5.1°C 0mm 0.17kPa 24135m 0.4m/s 0.99m/s
10:00
13% 2.4°C 0mm 80% 0cm 28° 5.6°C 0.06mm 0.18kPa 24135m 0.73m/s 0.79m/s
11:00
10% 2.9°C 0mm 80% 0cm 35° 6.2°C 0.13mm 0.19kPa 24134m 1.7m/s 1.7m/s
12:00
7% 2°C 0mm 72% 0cm 40° 6.8°C 0.19mm 0.28kPa 22079m 2m/s 1.7m/s
13:00
4% 1.7°C 0mm 69% 0cm 42° 7°C 0.19mm 0.31kPa 24102m 2.9m/s 1.9m/s
14:00
3% 1.1°C 0mm 62% 0cm 41° 7.9°C 0mm 0.4kPa 24135m 3.6m/s 1.8m/s
15:00
3% 1.4°C 0mm 57% 0cm 37° 9.4°C 0mm 0.5kPa 24135m 4.2m/s 2.6m/s
16:00
2% 1.8°C 0mm 58% 0cm 31° 9.8°C 0mm 0.51kPa 24135m 5m/s 4.2m/s
17:00
2% 2.3°C 0mm 61% 0cm 23° 9.6°C 0mm 0.47kPa 24135m 6.3m/s 4.5m/s
18:00
2% 3.4°C 0mm 67% 0cm 15° 9.2°C 0mm 0.38kPa 24135m 5.9m/s 3.5m/s
19:00
2% 1.7°C 0mm 67% 0cm 5.8° 7.4°C 0mm 0.34kPa 24135m 8.4m/s 5.1m/s
20:00
8% 0.2°C 0mm 70% 0cm -3.2° 5.1°C 0mm 0.26kPa 24134m 9.3m/s 3.6m/s
21:00
13% -0.1°C 0mm 72% 0cm -12° 4.5°C 0mm 0.24kPa 24135m 9.7m/s 3.2m/s
22:00
19% 0.2°C 0mm 75% 0cm -19° 4.4°C 0mm 0.21kPa 24134m 8.7m/s 3.3m/s
23:00
15% 1.5°C 0.01mm 76% 0cm -26° 5.5°C 0mm 0.22kPa 24135m 9m/s 4.7m/s
Fri, Apr 3 Sunrise 06:38 Sunset 19:43
24:00
11% 2.5°C 0.07mm 86% 0cm -30° 4.6°C 0.06mm 0.12kPa 24135m 10m/s 5.6m/s
01:00
7% 2.6°C 0.07mm 85% 0cm -32° 5°C 0.13mm 0.13kPa 24134m 11m/s 5.3m/s
02:00
5% 3°C 0.01mm 86% 0cm -31° 5.1°C 0mm 0.12kPa 24135m 12m/s 5.9m/s
03:00
3% 4°C 0.01mm 90% 0cm -27° 5.5°C 0mm 0.09kPa 24135m 13m/s 6.5m/s
04:00
1% 4.5°C 0.01mm 91% 0cm -22° 5.7°C 0mm 0.08kPa 24134m 14m/s 7.2m/s
05:00
1% 4.7°C 0.02mm 92% 0cm -14° 5.8°C 0.06mm 0.07kPa 24134m 15m/s 7.8m/s
06:00
0% 5.2°C 0.04mm 94% 0cm -6.1° 6.2°C 0.06mm 0.06kPa 24135m 16m/s 8.1m/s
07:00
0% 5.8°C 0mm 94% 0cm 6.7°C 0.06mm 0.06kPa 24134m 16m/s 8.3m/s
08:00
0% 6.7°C 0mm 96% 0cm 12° 7.3°C 0mm 0.04kPa 3818m 16m/s 8.3m/s
09:00
0% 7.5°C 0mm 97% 0cm 21° 8°C 0mm 0.03kPa 2649m 15m/s 7.7m/s
10:00
0% 8.5°C 0.01mm 97% 0cm 29° 8.9°C 0.06mm 0.03kPa 1173m 15m/s 7.7m/s
11:00
0% 9.1°C 0mm 95% 0cm 35° 9.9°C 0.06mm 0.06kPa 24134m 15m/s 8.2m/s
12:00
0% 9.2°C 0mm 92% 0cm 40° 10°C 0.06mm 0.1kPa 24134m 16m/s 8.4m/s
13:00
0% 9.7°C 0mm 88% 0cm 42° 12°C 0.06mm 0.16kPa 24135m 17m/s 9.7m/s
14:00
1% 9.7°C 0mm 90% 0cm 41° 11°C 0mm 0.14kPa 24134m 17m/s 9.5m/s
15:00
3% 9.4°C 0mm 86% 0cm 37° 12°C 0mm 0.19kPa 24135m 18m/s 10m/s
16:00
4% 9.6°C 0.04mm 87% 0cm 31° 12°C 0.13mm 0.18kPa 24134m 17m/s 9.7m/s
17:00
4% 8.8°C 0mm 87% 0cm 24° 11°C 0.13mm 0.16kPa 24134m 18m/s 9.9m/s
18:00
3% 8.1°C 0mm 81% 0cm 15° 11°C 0.19mm 0.25kPa 24134m 19m/s 11m/s
19:00
3% 4.6°C 0mm 81% 0cm 6.1° 7.7°C 0.19mm 0.2kPa 24135m 16m/s 11m/s
20:00
8% 3.7°C 0mm 85% 0cm -2.9° 6.1°C 0.13mm 0.14kPa 24135m 12m/s 8.1m/s
21:00
14% 2.8°C 0mm 89% 0cm -11° 4.5°C 0.06mm 0.1kPa 24135m 8.5m/s 5.2m/s
22:00
19% 1.8°C 0mm 93% 0cm -19° 2.9°C 0mm 0.06kPa 24135m 4.5m/s 2.4m/s
23:00
21% 2.1°C 0mm 91% 0cm -25° 3.4°C 0mm 0.07kPa 24135m 4m/s 2.1m/s
Sat, Apr 4 Sunrise 06:36 Sunset 19:44
24:00
22% 2.3°C 0mm 89% 0cm -30° 3.9°C 0mm 0.09kPa 24135m 3.5m/s 1.8m/s
01:00
24% 2.5°C 0mm 87% 0cm -31° 4.4°C 0mm 0.11kPa 24135m 2.9m/s 1.5m/s
02:00
30% 2.9°C 0mm 87% 0cm -30° 4.9°C 0.04mm 0.11kPa 24135m 5.1m/s 2m/s
03:00
37% 3.4°C 0mm 87% 0cm -27° 5.4°C 0.08mm 0.12kPa 24135m 7.3m/s 2.5m/s
04:00
43% 3.8°C 0mm 86% 0cm -21° 5.9°C 0.13mm 0.13kPa 24135m 9.4m/s 3.1m/s
05:00
37% 5.5°C 0.003mm 86% 0cm -14° 7.6°C 0.13mm 0.14kPa 24135m 10m/s 3.9m/s
06:00
31% 7.2°C 0.007mm 86% 0cm -5.7° 9.4°C 0.13mm 0.16kPa 24135m 11m/s 4.7m/s
07:00
25% 8.9°C 0.01mm 86% 0cm 3.3° 11°C 0.13mm 0.18kPa 24135m 13m/s 5.6m/s
08:00
18% 8.9°C 0.007mm 80% 0cm 12° 12°C 0.1mm 0.29kPa 24135m 14m/s 6.7m/s
09:00
11% 8.8°C 0.003mm 73% 0cm 21° 13°C 0.08mm 0.41kPa 24135m 15m/s 7.9m/s
10:00
4% 8.6°C 0mm 67% 0cm 29° 15°C 0.06mm 0.55kPa 24135m 16m/s 9m/s
11:00
3% 8.3°C 0mm 70% 0cm 36° 14°C 0.06mm 0.46kPa 24135m 16m/s 9.2m/s
12:00
1% 8°C 0mm 74% 0cm 41° 13°C 0.06mm 0.38kPa 24135m 17m/s 9.5m/s
13:00
0% 7.6°C 0mm 77% 0cm 43° 11°C 0.06mm 0.31kPa 24135m 17m/s 9.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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