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Rule Fog Hunter

Snowshill - Fog Hunter - Cotswolds

Snowshill, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 60.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Dewpoint Spread2.5°C
Visibility24135 (Clear)
Relative Humidity84%
Wind Speed3.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks morning mist and fog conditions that transform the Cotswolds' gentle landscapes into atmospheric scenes worthy of a Constable painting. We monitor temperature inversions, humidity levels, and overnight cooling to predict when valley fog will blanket the honey-stone villages and rolling hills.

The Cotswolds' distinctive topography of shallow river valleys creates perfect conditions for radiation fog and valley mist. Cold air pools in valleys overnight, and when combined with moisture from the River Windrush and its tributaries, creates dreamy morning conditions that soften the already pastoral landscape.

What makes Cotswolds fog photography special:

  • Slad Valley inversions - Laurie Lee's famous valley fills with morning mist, with hilltop villages emerging as islands above the fog layer
  • Arlington Row mist - Bibury's iconic weavers' cottages partially obscured by dawn fog, with honey-stone glowing through the haze
  • Valley villages - Bourton-on-the-Water and Lower Slaughter with fog settled along their streams, stone bridges emerging from mist
  • Church tower beacons - Stow-on-the-Wold and Painswick church towers rising above fog blankets, marking village locations

The best fog photography occurs on calm, clear autumn and winter mornings (September-March) following cold nights. Slad Valley—immortalized in Laurie Lee's "Cider with Rosie"—is particularly reliable for valley fog, with viewpoints along the valley rim offering elevated perspectives. Arlington Row benefits from mist rising from the River Coln, creating dreamy morning compositions of England's most photographed street. Arrive before dawn to capture the transition from pre-dawn blue light through foggy golden hour. Fog typically burns off by mid-morning, creating a narrow window of opportunity.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Fri, Apr 17
20:000%
21:000%
22:0035%
23:0035%
Sat, Apr 18
24:0038%
01:0045%
02:0045%
03:0053%
04:0043%
05:0028%
06:0026%
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%
03:000%
04:0043%
05:0049%
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 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%
22:0030%
23:0032%
Tue, Apr 21
24:0044%
01:0059%
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%
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 06:04 Sunset 20:09
20:00
55% 5.3°C 0mm 84% 0cm 1.1° 7.8°C 0.06mm 0.16kPa 24135m 8.6m/s 3.7m/s
21:00
75% 4.5°C 0mm 90% 0cm -7.8° 6°C 0.06mm 0.09kPa 24134m 6.4m/s 2.9m/s
22:00
94% 3.7°C 0mm 90% 0cm -15° 5.2°C 0.06mm 0.09kPa 24135m 2.4m/s 2.3m/s
23:00
96% 3.1°C 0mm 90% 0cm -21° 4.7°C 0.06mm 0.09kPa 24135m 1.9m/s 2m/s
Sun, Apr 19 Sunrise 06:04 Sunset 20:09
24:00
97% 2.7°C 0mm 90% 0cm -25° 4.1°C 0.06mm 0.08kPa 24134m 1.8m/s 1.8m/s
01:00
99% 2.4°C 0mm 92% 0cm -27° 3.6°C 0.06mm 0.07kPa 24135m 1.8m/s 1.9m/s
02:00
99% 2.1°C 0mm 92% 0cm -26° 3.2°C 0mm 0.06kPa 24135m 1.8m/s 1.9m/s
03:00
98% 1.8°C 0mm 93% 0cm -22° 2.9°C 0mm 0.05kPa 24134m 1.8m/s 1.8m/s
04:00
98% 1.6°C 0mm 93% 0cm -17° 2.6°C 0mm 0.05kPa 24134m 1.8m/s 1.8m/s
05:00
97% 1.4°C 0mm 93% 0cm -9.4° 2.4°C 0mm 0.05kPa 24135m 1.7m/s 1.8m/s
06:00
95% 1.1°C 0mm 93% 0cm -0.88° 2.1°C 0mm 0.05kPa 24134m 1.8m/s 1.8m/s
07:00
94% 1.6°C 0mm 91% 0cm 7.9° 2.9°C 0mm 0.07kPa 24135m 2.1m/s 1.8m/s
08:00
81% 2.5°C 0mm 83% 0cm 17° 5.2°C 0mm 0.15kPa 24135m 5.6m/s 2m/s
09:00
67% 3.1°C 0mm 77% 0cm 26° 6.8°C 0mm 0.23kPa 24135m 4.8m/s 2.9m/s
10:00
54% 3.4°C 0mm 71% 0cm 35° 8.3°C 0mm 0.31kPa 24134m 4.7m/s 3.5m/s
11:00
40% 3.3°C 0mm 65% 0cm 42° 9.6°C 0mm 0.42kPa 24134m 4.1m/s 3.3m/s
12:00
27% 3.1°C 0mm 60% 0cm 47° 11°C 0mm 0.52kPa 24135m 3.8m/s 3.1m/s
13:00
13% 2.8°C 0mm 56% 0cm 49° 11°C 0mm 0.6kPa 24135m 3.9m/s 3.1m/s
14:00
9% 2.6°C 0mm 53% 0cm 48° 12°C 0mm 0.65kPa 24135m 4m/s 3.4m/s
15:00
5% 2.7°C 0mm 52% 0cm 43° 12°C 0mm 0.68kPa 24134m 4.1m/s 3.4m/s
16:00
1% 2.8°C 0mm 52% 0cm 36° 12°C 0mm 0.69kPa 24134m 4m/s 3.3m/s
17:00
1% 3°C 0mm 53% 0cm 28° 12°C 0mm 0.66kPa 24135m 3.8m/s 3.1m/s
18:00
2% 4.8°C 0mm 62% 0cm 19° 12°C 0.06mm 0.53kPa 24134m 3.3m/s 2.4m/s
19:00
2% 5.2°C 0mm 71% 0cm 10° 10°C 0.06mm 0.37kPa 24135m 1.7m/s 1.6m/s
20:00
24% 2.6°C 0mm 71% 0cm 1.3° 7.5°C 0mm 0.3kPa 24134m 1.1m/s 1m/s
21:00
47% 2.1°C 0mm 77% 0cm -7.5° 5.8°C 0mm 0.21kPa 24135m 0.7m/s 0.65m/s
22:00
69% 1.6°C 0mm 78% 0cm -15° 5.1°C 0mm 0.19kPa 24135m 1.3m/s 1.3m/s
23:00
68% 1.6°C 0mm 80% 0cm -21° 4.6°C 0mm 0.17kPa 24134m 1.7m/s 1.7m/s
Mon, Apr 20 Sunrise 06:02 Sunset 20:11
24:00
68% 1.8°C 0mm 79% 0cm -25° 5.1°C 0mm 0.18kPa 24134m 1.4m/s 1.4m/s
01:00
67% 2°C 0mm 80% 0cm -27° 5.2°C 0mm 0.18kPa 24135m 1.7m/s 1.6m/s
02:00
65% 2°C 0mm 87% 0cm -25° 4°C 0mm 0.11kPa 24134m 1.4m/s 1.4m/s
03:00
64% 2°C 0mm 89% 0cm -22° 3.6°C 0mm 0.09kPa 24135m 1.2m/s 1.2m/s
04:00
62% 2.1°C 0mm 92% 0cm -16° 3.3°C 0mm 0.07kPa 24135m 1.4m/s 1.5m/s
05:00
61% 1.9°C 0mm 93% 0cm -9.1° 3°C 0mm 0.06kPa 24135m 1.4m/s 1.4m/s
06:00
60% 1.7°C 0mm 92% 0cm -0.47° 2.9°C 0mm 0.06kPa 24134m 1.2m/s 1.2m/s
07:00
59% 2.1°C 0mm 88% 0cm 8.2° 3.9°C 0mm 0.1kPa 24134m 1.2m/s 1.2m/s
08:00
59% 1.8°C 0mm 75% 0cm 17° 5.9°C 0mm 0.23kPa 24135m 3.2m/s 1.7m/s
09:00
59% 1.7°C 0mm 67% 0cm 26° 7.4°C 0mm 0.34kPa 24135m 3.8m/s 2.8m/s
10:00
59% 2.3°C 0mm 65% 0cm 35° 8.6°C 0mm 0.39kPa 24134m 4.3m/s 3.4m/s
11:00
55% 2.7°C 0mm 63% 0cm 42° 9.5°C 0mm 0.44kPa 24135m 4.4m/s 3.8m/s
12:00
51% 2.3°C 0mm 58% 0cm 47° 10°C 0mm 0.52kPa 24134m 4.5m/s 4m/s
13:00
47% 2.4°C 0mm 56% 0cm 50° 11°C 0mm 0.57kPa 24135m 4.5m/s 4m/s
14:00
33% 2.9°C 0mm 57% 0cm 48° 11°C 0mm 0.57kPa 23922m 4.7m/s 4.3m/s
15:00
18% 2.8°C 0mm 61% 0cm 44° 10°C 0.06mm 0.49kPa 24135m 4.8m/s 4.9m/s
16:00
4% 3.8°C 0mm 68% 0cm 37° 9.4°C 0.06mm 0.38kPa 24135m 4.7m/s 3.7m/s
17:00
4% 3.7°C 0mm 66% 0cm 28° 9.7°C 0.06mm 0.41kPa 24135m 4.6m/s 3.5m/s
18:00
3% 4.3°C 0mm 68% 0cm 19° 9.8°C 0.06mm 0.38kPa 24135m 4.7m/s 3.3m/s
19:00
3% 4.9°C 0mm 77% 0cm 10° 8.8°C 0.13mm 0.27kPa 24134m 6.2m/s 3.6m/s
20:00
19% 4.8°C 0mm 83% 0cm 1.5° 7.5°C 0.06mm 0.18kPa 24134m 7.4m/s 3.4m/s
21:00
34% 4.7°C 0mm 86% 0cm -7.2° 6.8°C 0.06mm 0.14kPa 24134m 8.2m/s 3.4m/s
22:00
50% 3.8°C 0mm 93% 0cm -15° 4.7°C 0.06mm 0.06kPa 24134m 8.6m/s 3.2m/s
23:00
53% 3.1°C 0mm 94% 0cm -21° 3.9°C 0.06mm 0.05kPa 24135m 9.3m/s 3.2m/s
Tue, Apr 21 Sunrise 06:00 Sunset 20:13
24:00
56% 2.9°C 0mm 96% 0cm -25° 3.5°C 0.06mm 0.03kPa 24134m 9.9m/s 3.3m/s
01:00
59% 2.7°C 0mm 97% 0cm -26° 3.1°C 0.06mm 0.02kPa 24135m 9.2m/s 3.1m/s
02:00
60% 3.4°C 0mm 89% 0cm -25° 5.1°C 0.04mm 0.1kPa 24135m 9.2m/s 4.2m/s
03:00
62% 4°C 0mm 80% 0cm -22° 7.1°C 0.02mm 0.2kPa 24135m 9.1m/s 5.4m/s
04:00
63% 4.4°C 0mm 72% 0cm -16° 9.1°C 0mm 0.32kPa 24135m 9m/s 6.6m/s
05:00
58% 4.7°C 0.003mm 70% 0cm -8.8° 9.9°C 0mm 0.37kPa 24135m 9.2m/s 6.8m/s
06:00
54% 4.9°C 0.007mm 68% 0cm 0.02° 11°C 0mm 0.41kPa 24135m 9.3m/s 7m/s
07:00
49% 5.2°C 0.01mm 65% 0cm 8.5° 11°C 0mm 0.47kPa 24135m 9.4m/s 7.1m/s
08:00
41% 5.4°C 0.007mm 65% 0cm 18° 12°C 0mm 0.48kPa 24135m 9.8m/s 7.3m/s
09:00
34% 5.7°C 0.003mm 65% 0cm 27° 12°C 0mm 0.5kPa 24135m 10m/s 7.4m/s
10:00
26% 5.9°C 0mm 64% 0cm 35° 12°C 0mm 0.52kPa 24135m 11m/s 7.6m/s
11:00
22% 5.6°C 0mm 67% 0cm 43° 12°C 0mm 0.46kPa 24135m 11m/s 7.3m/s
12:00
19% 5.3°C 0mm 69% 0cm 48° 11°C 0mm 0.4kPa 24135m 11m/s 7m/s
13:00
15% 5°C 0mm 71% 0cm 50° 9.9°C 0mm 0.35kPa 24135m 11m/s 6.6m/s
14:00
19% 4.6°C 0mm 75% 0cm 49° 8.8°C 0mm 0.29kPa 24135m 12m/s 6.1m/s
15:00
23% 4.2°C 0mm 78% 0cm 44° 7.7°C 0mm 0.23kPa 24135m 12m/s 5.7m/s
16:00
27% 3.7°C 0mm 82% 0cm 37° 6.6°C 0mm 0.18kPa 24135m 13m/s 5.2m/s
17:00
27% 3.5°C 0mm 84% 0cm 29° 6°C 0mm 0.15kPa 24135m 12m/s 4.7m/s
18:00
27% 3.3°C 0mm 87% 0cm 20° 5.3°C 0mm 0.12kPa 24135m 11m/s 4.3m/s
19:00
27% 3.1°C 0mm 90% 0cm 10° 4.6°C 0mm 0.09kPa 24135m 10m/s 3.8m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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