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Rule Fog Hunter

Thirlmere - Fog Hunter - Lake District

Penrith, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread2.6°C
Visibility24134 (Clear)
Relative Humidity84%
Wind Speed5.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Dense Fog at Dawn
Thirlmere
Sun, Jun 14 · 03:00–04:00 · 1h window
Medium confidence
62%
🌫️Fog Probability100%
Dewpoint Spread: 0.3°C
Visibility: 82 (Dense fog)
Relative Humidity: 98%
Wind Speed: 1.6m/s (calm conditions)
fog weather icon
Dense Fog at Sunrise
Thirlmere
Sun, Jun 14 · 04:00–05:00
🌫️Fog Probability:100%
Medium

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the conditions that create the Lake District's legendary atmospheric photography. We combine fog probability, dewpoint spread, visibility, and wind data to predict when and where mist will form over these famous lakes and valleys.

The Lake District's combination of lakes, tarns, and enclosed valleys creates ideal conditions for fog formation. Cool, calm nights allow mist to pool in valley bottoms, creating ethereal scenes at dawn that have inspired poets and photographers for centuries.

What makes the Lake District special for fog photography:

  • Lake mist - Cold water surfaces generate fog that pools over the lakes at dawn
  • Valley inversions - Mountain-ringed valleys trap mist while fells rise above
  • Romantic landscapes - This is Wordsworth and Turner country, with timeless views
  • Accessible locations - Well-maintained paths reach viewpoints above the fog layer

Peak fog season runs from late August through October, when temperature differentials are greatest. The best conditions typically occur on calm, clear nights when temperatures drop near dewpoint. Arrive before dawn—lake mist often lifts within an hour or two of sunrise. Higher viewpoints like Catbells or Loughrigg offer shots looking down at fog-filled valleys.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 74 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Sat, Jun 6
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, Jun 7
24:000%
01:000%
02:000%
03:000%
04:0055%
05:0055%
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, Jun 8
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%
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20:000%
21:000%
22:000%
23:000%
Tue, Jun 9
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
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, Jun 6 Sunrise 04:38 Sunset 21:42
09:00
0% 7.4°C 0.07mm 84% 0cm 34° 10°C 0.06mm 0.2kPa 24134m 11m/s 5m/s
10:00
0% 7.5°C 0.09mm 86% 0cm 43° 9.8°C 0.13mm 0.17kPa 24135m 11m/s 4.8m/s
11:00
0% 7.7°C 0.08mm 88% 0cm 50° 9.6°C 0.25mm 0.15kPa 24135m 11m/s 5m/s
12:00
0% 7.9°C 0.02mm 89% 0cm 55° 9.6°C 0.31mm 0.13kPa 24134m 11m/s 4.7m/s
13:00
0% 8.6°C 0mm 91% 0cm 58° 10°C 0.31mm 0.11kPa 15674m 9.7m/s 3.9m/s
14:00
0% 9.4°C 0mm 90% 0cm 57° 11°C 0mm 0.13kPa 10349m 7.4m/s 3.4m/s
15:00
0% 9.4°C 0mm 85% 0cm 52° 12°C 0mm 0.2kPa 24135m 6.3m/s 3.6m/s
16:00
0% 9.4°C 0mm 84% 0cm 45° 12°C 0mm 0.22kPa 24135m 5.6m/s 3.2m/s
17:00
0% 9.3°C 0mm 82% 0cm 37° 12°C 0mm 0.25kPa 24134m 3.7m/s 2.3m/s
18:00
0% 9.6°C 0mm 80% 0cm 28° 13°C 0.06mm 0.31kPa 24134m 2.2m/s 1.5m/s
19:00
0% 9.9°C 0mm 81% 0cm 20° 13°C 0.06mm 0.28kPa 24134m 1.5m/s 1m/s
20:00
2% 9.9°C 0.01mm 86% 0cm 12° 12°C 0mm 0.2kPa 24134m 0.42m/s 0.39m/s
21:00
5% 9.6°C 0.02mm 89% 0cm 4.1° 11°C 0.06mm 0.15kPa 24135m 0.82m/s 0.83m/s
22:00 ☾
7% 9.5°C 0mm 90% 0cm -2.5° 11°C 0.06mm 0.13kPa 24135m 1m/s 1.1m/s
23:00 ☾
5% 9.3°C 0mm 92% 0cm -7.7° 11°C 0.06mm 0.1kPa 24134m 1.4m/s 1.4m/s
Sun, Jun 7 Sunrise 04:38 Sunset 21:42
24:00 ☾
3% 8.1°C 0mm 94% 0cm -11° 9.1°C 0.06mm 0.08kPa 24134m 1.2m/s 1.2m/s
01:00 ☾
1% 9.3°C 0.03mm 92% 0cm -13° 10°C 0.06mm 0.09kPa 24134m 1.4m/s 1.3m/s
02:00 ☾
1% 9.5°C 0mm 94% 0cm -12° 11°C 0mm 0.08kPa 24134m 2.3m/s 1.6m/s
03:00 ☾
0% 8.9°C 0mm 94% 0cm -9° 9.7°C 0.06mm 0.07kPa 24135m 1.4m/s 1.3m/s
04:00 ☾
0% 7.7°C 0mm 95% 0cm -4.4° 8.5°C 0.06mm 0.06kPa 24134m 2m/s 2.1m/s
05:00
0% 7.6°C 0mm 96% 0cm 2° 8.2°C 0.06mm 0.04kPa 16955m 3.9m/s 3.1m/s
06:00
0% 8.6°C 0mm 94% 0cm 9° 9.6°C 0.06mm 0.08kPa 22832m 5.1m/s 3.4m/s
07:00
0% 9.3°C 0mm 91% 0cm 17° 11°C 0.06mm 0.12kPa 24135m 7.9m/s 3.9m/s
08:00
0% 10°C 0mm 88% 0cm 26° 12°C 0mm 0.17kPa 23025m 9.6m/s 3.9m/s
09:00
0% 11°C 0mm 85% 0cm 34° 13°C 0mm 0.23kPa 24134m 9.6m/s 4.7m/s
10:00
0% 10°C 0mm 83% 0cm 43° 13°C 0.06mm 0.26kPa 24135m 9.2m/s 5.1m/s
11:00
0% 10°C 0mm 77% 0cm 50° 14°C 0.06mm 0.36kPa 24135m 9.8m/s 6.4m/s
12:00
0% 9.9°C 0mm 74% 0cm 56° 14°C 0.13mm 0.42kPa 24135m 11m/s 7.3m/s
13:00
0% 11°C 0mm 73% 0cm 58° 15°C 0.13mm 0.48kPa 23313m 13m/s 8.6m/s
14:00
0% 11°C 0mm 71% 0cm 57° 16°C 0mm 0.51kPa 24134m 13m/s 9.5m/s
15:00
0% 11°C 0.09mm 76% 0cm 52° 15°C 0.06mm 0.42kPa 21059m 14m/s 8.9m/s
16:00
0% 11°C 0mm 80% 0cm 45° 14°C 0.25mm 0.32kPa 24135m 13m/s 7.9m/s
17:00
0% 9.9°C 0.02mm 80% 0cm 37° 13°C 0.25mm 0.31kPa 24135m 13m/s 6.6m/s
18:00
0% 10°C 0mm 81% 0cm 28° 14°C 0.25mm 0.3kPa 24134m 13m/s 5.9m/s
19:00
0% 10°C 0mm 80% 0cm 20° 13°C 0.31mm 0.3kPa 24135m 12m/s 5.2m/s
20:00
1% 9.8°C 0mm 80% 0cm 12° 13°C 0mm 0.3kPa 24134m 11m/s 4.6m/s
21:00
1% 9.6°C 0mm 85% 0cm 4.2° 12°C 0mm 0.22kPa 24134m 7.5m/s 3.6m/s
22:00 ☾
2% 9.5°C 0.11mm 90% 0cm -2.4° 11°C 0.06mm 0.13kPa 24134m 7.9m/s 4.1m/s
23:00 ☾
1% 9.9°C 0.07mm 87% 0cm -7.6° 12°C 0.13mm 0.19kPa 24135m 10m/s 4.8m/s
Mon, Jun 8 Sunrise 04:37 Sunset 21:43
24:00 ☾
1% 10°C 0.63mm 92% 0cm -11° 12°C 0.5mm 0.11kPa 14570m 10m/s 4.7m/s
01:00 ☾
0% 11°C 1.1mm 97% 0cm -12° 11°C 1.4mm 0.05kPa 12995m 11m/s 5m/s
02:00 ☾
0% 11°C 0.98mm 98% 0cm -12° 11°C 1.1mm 0.03kPa 5205m 10m/s 5m/s
03:00 ☾
0% 11°C 1.1mm 97% 0cm -9° 11°C 2.4mm 0.04kPa 8630m 11m/s 5.3m/s
04:00 ☾
0% 11°C 1.5mm 97% 0cm -4.3° 11°C 4.1mm 0.04kPa 6406m 10m/s 4.9m/s
05:00
0% 11°C 0.96mm 96% 0cm 2° 11°C 5.9mm 0.06kPa 14334m 14m/s 6.7m/s
06:00
0% 11°C 0.82mm 96% 0cm 9.1° 11°C 6.8mm 0.05kPa 11574m 12m/s 6.1m/s
07:00
0% 10°C 0.94mm 95% 0cm 17° 11°C 7.7mm 0.06kPa 12212m 13m/s 6.4m/s
08:00
0% 11°C 4.7mm 96% 0cm 26° 11°C 2.2mm 0.05kPa 3904m 9.8m/s 5.2m/s
09:00
1% 8°C 0.96mm 97% 0cm 34° 8.4°C 6.6mm 0.03kPa 11109m 8.9m/s 3.7m/s
10:00
1% 8.8°C 0mm 91% 0cm 43° 10°C 6.8mm 0.11kPa 13096m 5.9m/s 3.3m/s
11:00
1% 8.4°C 0.98mm 95% 0cm 50° 9.2°C 7.4mm 0.06kPa 7799m 6.8m/s 4m/s
12:00
2% 7.4°C 0.16mm 94% 0cm 56° 8.3°C 8.1mm 0.06kPa 24079m 8.4m/s 4.8m/s
13:00
2% 7.3°C 0.14mm 91% 0cm 58° 8.7°C 8.3mm 0.1kPa 23883m 6.5m/s 3m/s
14:00
17% 7.7°C 0mm 81% 0cm 57° 11°C 0.31mm 0.25kPa 14353m 7.9m/s 6.4m/s
15:00
33% 7.7°C 0mm 80% 0cm 52° 11°C 0.56mm 0.27kPa 17492m 9m/s 7.1m/s
16:00
48% 6.7°C 0mm 70% 0cm 45° 12°C 0.69mm 0.42kPa 22812m 9.4m/s 7.8m/s
17:00
49% 6.3°C 0mm 68% 0cm 37° 12°C 0.75mm 0.46kPa 24135m 9.3m/s 7.6m/s
18:00
50% 7°C 0mm 73% 0cm 29° 12°C 0.81mm 0.38kPa 24135m 9.1m/s 6.8m/s
19:00
51% 7.9°C 0mm 81% 0cm 20° 11°C 1mm 0.26kPa 24135m 8.6m/s 5.6m/s
20:00
51% 7.3°C 0.08mm 85% 0cm 12° 9.7°C 1.6mm 0.18kPa 21465m 9m/s 5.4m/s
21:00
52% 6.6°C 0.16mm 90% 0cm 4.3° 8.2°C 2.3mm 0.11kPa 18795m 9.4m/s 5.1m/s
22:00 ☾
52% 5.8°C 0.24mm 94% 0cm -2.3° 6.7°C 2.9mm 0.06kPa 16125m 9.8m/s 4.9m/s
23:00 ☾
46% 5.7°C 0.21mm 93% 0cm -7.5° 6.7°C 3.1mm 0.07kPa 18795m 9.8m/s 4.8m/s
Tue, Jun 9 Sunrise 04:36 Sunset 21:43
24:00 ☾
41% 5.5°C 0.18mm 92% 0cm -11° 6.7°C 3.2mm 0.08kPa 21465m 9.7m/s 4.7m/s
01:00 ☾
35% 5.4°C 0.15mm 91% 0cm -12° 6.7°C 3.4mm 0.08kPa 24135m 9.7m/s 4.7m/s
02:00 ☾
29% 5.4°C 0.12mm 92% 0cm -12° 6.7°C 2.5mm 0.08kPa 24135m 10m/s 5.7m/s
03:00 ☾
24% 5.3°C 0.1mm 92% 0cm -8.9° 6.6°C 1.7mm 0.08kPa 24135m 11m/s 6.6m/s
04:00 ☾
18% 5.3°C 0.07mm 92% 0cm -4.2° 6.6°C 0.81mm 0.08kPa 24135m 11m/s 7.6m/s
05:00
15% 5.6°C 0.1mm 88% 0cm 2.1° 7.4°C 1.1mm 0.12kPa 23492m 12m/s 8.2m/s
06:00
11% 5.8°C 0.13mm 84% 0cm 9.1° 8.3°C 1.5mm 0.17kPa 22849m 12m/s 8.7m/s
07:00
8% 6°C 0.16mm 80% 0cm 17° 9.2°C 1.8mm 0.23kPa 22205m 12m/s 9.3m/s
08:00
11% 6.3°C 0.14mm 84% 0cm 26° 8.8°C 1.7mm 0.18kPa 20584m 12m/s 8.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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