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Rule Fog Hunter

Buttertubs Pass - Fog Hunter - Yorkshire Dales

Hawes, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread2.7°C
Visibility24134 (Clear)
Relative Humidity83%
Wind Speed12.2m/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 at Sunset
Buttertubs Pass
Fri, Apr 10 · 19:00–21:00 · 2h window
Low confidence
39%
🌫️Fog Probability62.7-84.8%
Dewpoint Spread: 0.4°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 2.5m/s (calm conditions)

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts when temperature inversions and fog conditions create atmospheric valley scenes in the Yorkshire Dales. We track overnight cooling, humidity, wind speed, and topography to identify when fog fills limestone valleys while peaks emerge above.

The Yorkshire Dales' distinctive U-shaped valleys carved by glaciers create natural bowls that trap cold air and fog, while high ground like Pen-y-ghent and Ingleborough rises above the mist layer. The combination of limestone formations, ancient stone walls, and historic barns emerging from fog creates quintessentially northern English scenes.

What makes Yorkshire Dales fog photography special:

  • Valley inversions - Deep dales fill with fog while peaks and high pastures stay clear in sunshine
  • Limestone drama - Malham Cove's 260-foot cliff and limestone pavement emerge from dawn mist
  • Stone-wall patterns - Traditional dry-stone walls create geometric patterns disappearing into fog
  • Historic structures - Ribblehead Viaduct's 24 arches pierce fog layers like a Victorian ghost ship

Malham Cove becomes magical when fog pools in the valley below its curved limestone amphitheater—arrive before dawn to capture the cliffs emerging as mist burns off. Ribblehead Viaduct crossing fog-filled valleys creates iconic compositions, especially with early light. From Pen-y-ghent summit, fog inversions reveal only the highest peaks above a sea of white. The limestone pavements near Malham and Ingleborough become otherworldly when patches of fog drift through their geometric patterns. Best conditions occur on clear, calm autumn and winter nights when valley temperatures drop rapidly. Winter fog can persist all day in sheltered valleys, providing extended shooting windows.

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72-hour requirements breakdown

What passed or failed, hour by hour
1matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Fri, Apr 3
20:000%
21:000%
22:000%
23:000%
Sat, Apr 4
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:0043%
07:0043%
08:0094%
09:000%
10:0031%
11:0034%
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 5
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%
22:000%
23:000%
Mon, Apr 6
24:000%
01:000%
02:000%
03:000%
04:0043%
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%
22:0039%
23:0043%
Tue, Apr 7
24:0043%
01:0043%
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%
16:0040%
17:0034%
18:0034%
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 4 Sunrise 06:34 Sunset 19:50
20:00
0% 4.7°C 0.05mm 83% 0cm -2° 7.4°C 0mm 0.17kPa 24134m 22m/s 12m/s
21:00
0% 5.5°C 0.34mm 90% 0cm -10° 7.1°C 0.31mm 0.11kPa 20789m 25m/s 12m/s
22:00
0% 4.8°C 3.7mm 93% 0cm -18° 5.9°C 3.9mm 0.07kPa 5688m 24m/s 16m/s
23:00
0% 2.2°C 0mm 85% 0cm -24° 4.5°C 4.4mm 0.13kPa 23176m 24m/s 14m/s
Sun, Apr 5 Sunrise 06:34 Sunset 19:50
24:00
0% 1.9°C 0mm 88% 0cm -28° 3.8°C 4.5mm 0.1kPa 22533m 24m/s 15m/s
01:00
0% 2.9°C 0.25mm 91% 0cm -30° 4.2°C 4.8mm 0.07kPa 11348m 22m/s 15m/s
02:00
11% 2.9°C 0.05mm 95% 0cm -29° 3.7°C 0.25mm 0.04kPa 5720m 20m/s 14m/s
03:00
21% 0.1°C 0mm 91% 0.03cm -26° 1.4°C 0.31mm 0.06kPa 13467m 22m/s 13m/s
04:00
32% -0.8°C 0mm 87% 0cm -20° 1.1°C 0.38mm 0.08kPa 24134m 22m/s 13m/s
05:00
39% -1.2°C 0mm 86% 0cm -13° 0.94°C 0.38mm 0.09kPa 24134m 19m/s 11m/s
06:00
45% -1.3°C 0mm 87% 0cm -5.2° 0.69°C 0.38mm 0.09kPa 24135m 15m/s 8.7m/s
07:00
52% -0.8°C 0mm 89% 0.05cm 3.5° 0.78°C 0.44mm 0.07kPa 16910m 13m/s 7.2m/s
08:00
63% -0.4°C 0mm 88% 0.08cm 12° 1.5°C 0.06mm 0.08kPa 24134m 12m/s 7.1m/s
09:00
73% 0°C 0.34mm 84% 0.53cm 21° 2.5°C 0.25mm 0.12kPa 4121m 12m/s 8.6m/s
10:00
84% 2°C 0.92mm 98% 1.1cm 28° 2.2°C 1.2mm 0.01kPa 33m 13m/s 7.2m/s
11:00
81% 0.5°C 0mm 92% 0.21cm 35° 1.6°C 1.6mm 0.05kPa 3357m 15m/s 9.4m/s
12:00
79% 0.4°C 0mm 85% 0.38cm 40° 2.5°C 1.9mm 0.11kPa 4135m 15m/s 10m/s
13:00
76% 0.2°C 0mm 79% 0.37cm 42° 3.5°C 2.3mm 0.17kPa 16016m 16m/s 10m/s
14:00
68% 0.1°C 0mm 77% 0.37cm 41° 3.7°C 0.38mm 0.18kPa 15935m 16m/s 11m/s
15:00
59% 0.4°C 0mm 79% 0.27cm 37° 3.7°C 0.69mm 0.17kPa 20573m 15m/s 11m/s
16:00
51% 0.1°C 0mm 77% 0.12cm 31° 3.8°C 0.88mm 0.19kPa 24120m 15m/s 10m/s
17:00
38% 0°C 0mm 78% 0.14cm 24° 3.5°C 1mm 0.17kPa 24063m 15m/s 10m/s
18:00
24% -0.2°C 0mm 81% 0cm 16° 2.8°C 1.1mm 0.14kPa 24134m 14m/s 8.9m/s
19:00
11% -0.7°C 0mm 82% 0cm 6.9° 2°C 1.1mm 0.12kPa 24135m 12m/s 7m/s
20:00
9% -1.2°C 0mm 86% 0cm -1.7° 0.86°C 0mm 0.09kPa 24135m 12m/s 5.4m/s
21:00
6% -1.6°C 0mm 90% 0cm -10° -0.15°C 0mm 0.06kPa 24135m 10m/s 3.2m/s
22:00
4% -2°C 0mm 91% 0cm -17° -0.74°C 0mm 0.05kPa 24134m 4.1m/s 2.1m/s
23:00
4% -2.3°C 0mm 91% 0cm -23° -0.97°C 0mm 0.05kPa 24134m 1.8m/s 1.8m/s
Mon, Apr 6 Sunrise 06:31 Sunset 19:52
24:00
5% -2.2°C 0mm 91% 0cm -28° -0.95°C 0mm 0.05kPa 24134m 1.9m/s 2m/s
01:00
5% -2.2°C 0mm 92% 0cm -29° -1°C 0mm 0.05kPa 24134m 1.9m/s 2m/s
02:00
18% -2.2°C 0mm 92% 0cm -28° -1°C 0mm 0.05kPa 24135m 1.9m/s 2m/s
03:00
30% -2.1°C 0mm 92% 0cm -25° -1°C 0mm 0.04kPa 24134m 1.9m/s 2m/s
04:00
43% -1.9°C 0mm 93% 0cm -20° -0.93°C 0mm 0.04kPa 24135m 2m/s 2.1m/s
05:00
33% -1.9°C 0mm 92% 0cm -13° -0.76°C 0mm 0.05kPa 24134m 1.8m/s 1.8m/s
06:00
22% -1.9°C 0mm 91% 0cm -4.9° -0.55°C 0mm 0.05kPa 24134m 1.7m/s 1.7m/s
07:00
12% -1.5°C 0mm 87% 0cm 3.8° 0.32°C 0mm 0.08kPa 24135m 2.2m/s 2m/s
08:00
13% -0.8°C 0mm 84% 0cm 12° 1.6°C 0mm 0.11kPa 24134m 3.3m/s 1.9m/s
09:00
15% 0°C 0mm 80% 0cm 21° 3°C 0mm 0.15kPa 24135m 4.6m/s 2.1m/s
10:00
16% -0.1°C 0mm 70% 0cm 29° 4.8°C 0mm 0.26kPa 24135m 7.7m/s 3.5m/s
11:00
16% -0.6°C 0mm 63% 0cm 35° 5.9°C 0mm 0.34kPa 24135m 6.8m/s 4.1m/s
12:00
16% 0.1°C 0mm 60% 0cm 40° 7.2°C 0mm 0.4kPa 24135m 6.8m/s 4.8m/s
13:00
16% 1.4°C 0mm 62% 0cm 42° 8.2°C 0mm 0.41kPa 24134m 7m/s 5.2m/s
14:00
20% 2.2°C 0mm 63% 0cm 41° 8.8°C 0mm 0.42kPa 24134m 7.6m/s 5.5m/s
15:00
24% 3.1°C 0mm 66% 0cm 38° 9.2°C 0mm 0.4kPa 24134m 7.4m/s 5.7m/s
16:00
28% 4°C 0mm 70% 0cm 32° 9.1°C 0mm 0.35kPa 24135m 7.1m/s 5.3m/s
17:00
24% 4.9°C 0mm 79% 0cm 24° 8.4°C 0mm 0.23kPa 24134m 6.9m/s 4.3m/s
18:00
19% 5.2°C 0mm 82% 0cm 16° 8°C 0mm 0.19kPa 24134m 7.5m/s 3.5m/s
19:00
15% 5°C 0mm 86% 0cm 7.1° 7.2°C 0.06mm 0.14kPa 24135m 5m/s 2.6m/s
20:00
19% 4°C 0mm 91% 0cm -1.4° 5.4°C 0mm 0.08kPa 24134m 2m/s 2.2m/s
21:00
22% 3.5°C 0mm 92% 0cm -9.8° 4.6°C 0mm 0.07kPa 24134m 2m/s 2.2m/s
22:00
26% 3.1°C 0mm 93% 0cm -17° 4.1°C 0mm 0.06kPa 24135m 1.8m/s 2.1m/s
23:00
28% 2.8°C 0mm 94% 0cm -23° 3.8°C 0mm 0.05kPa 24134m 1.9m/s 2m/s
Tue, Apr 7 Sunrise 06:29 Sunset 19:54
24:00
30% 2.7°C 0mm 94% 0cm -27° 3.6°C 0mm 0.05kPa 24134m 1.8m/s 2.1m/s
01:00
32% 2.6°C 0mm 94% 0cm -29° 3.5°C 0mm 0.05kPa 24135m 1.8m/s 2m/s
02:00
54% 2.9°C 0mm 87% 0cm -28° 4.8°C 0mm 0.11kPa 24135m 5.1m/s 3m/s
03:00
75% 3.1°C 0mm 81% 0cm -25° 6.2°C 0mm 0.18kPa 24135m 8.4m/s 4m/s
04:00
97% 3.2°C 0mm 74% 0cm -19° 7.6°C 0mm 0.27kPa 24135m 12m/s 5.1m/s
05:00
97% 3.9°C 0mm 70% 0cm -13° 9°C 0mm 0.34kPa 24135m 11m/s 5.6m/s
06:00
96% 4.6°C 0mm 67% 0cm -4.5° 10°C 0mm 0.42kPa 24135m 11m/s 6.2m/s
07:00
96% 5.1°C 0mm 63% 0cm 4.2° 12°C 0mm 0.52kPa 24135m 10m/s 6.7m/s
08:00
84% 5.7°C 0.003mm 63% 0cm 13° 12°C 0mm 0.53kPa 24135m 10m/s 6.6m/s
09:00
71% 6.2°C 0.007mm 63% 0cm 21° 13°C 0mm 0.55kPa 24135m 9.8m/s 6.4m/s
10:00
59% 6.7°C 0.01mm 63% 0cm 29° 14°C 0mm 0.57kPa 24135m 9.5m/s 6.3m/s
11:00
55% 7.1°C 0.007mm 68% 0cm 36° 13°C 0.02mm 0.47kPa 24135m 9.1m/s 5.5m/s
12:00
51% 7.5°C 0.003mm 74% 0cm 41° 12°C 0.04mm 0.37kPa 24135m 8.7m/s 4.7m/s
13:00
47% 7.7°C 0mm 79% 0cm 43° 11°C 0.06mm 0.28kPa 24135m 8.3m/s 3.8m/s
14:00
42% 7.4°C 0mm 84% 0cm 42° 9.9°C 0.04mm 0.19kPa 24135m 7m/s 3.4m/s
15:00
37% 7°C 0mm 90% 0cm 38° 8.6°C 0.02mm 0.12kPa 24135m 5.8m/s 3m/s
16:00
32% 6.5°C 0mm 95% 0cm 32° 7.2°C 0mm 0.05kPa 24135m 4.5m/s 2.5m/s
17:00
25% 6.1°C 0mm 94% 0cm 24° 7°C 0mm 0.06kPa 24135m 4.4m/s 2.6m/s
18:00
19% 5.8°C 0mm 93% 0cm 16° 6.7°C 0mm 0.06kPa 24135m 4.3m/s 2.7m/s
19:00
12% 5.4°C 0mm 93% 0cm 7.4° 6.5°C 0mm 0.07kPa 24135m 4.2m/s 2.8m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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