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Rule Fog Hunter

Fog Hunter Forecast for Derwentwater, Lake District

Penrith, England, United Kingdom

Derwentwater offers wooded islands, jetties and shoreline boulders beneath Catbells and surrounding fells, creating clear foreground-to-ridge compositions.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread3.5°C
Visibility24135 (Clear)
Relative Humidity79%
Wind Speed7.6m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (79-hour forecast)

  • Fog Probability100% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Lake District. The requirements and hourly values below show how those signals apply at Derwentwater.

Explore Fog Hunter conditions across Lake District →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Derwentwater during the last 365 days.

Last 30 days
7
recorded matching windows · 86% average confidence
Last 90 days
9
recorded matching windows · 83% average confidence
Last 365 days
9
recorded matching windows · 83% average confidence

Only 9 completed matches are recorded in the last 365 days—insufficient history to identify a reliable typical start time or month.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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79-hour requirements breakdown

When available, the detailed table below covers only the stated 79-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

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
≥ 75.0%
Tue, Aug 18
06:000%
07:000%
08:0029%
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%
Wed, Aug 19
24:000%
01:000%
02:0030%
03:0030%
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%
23:0030%
Thu, Aug 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%
22:000%
23:000%
Fri, Aug 21
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%
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
Tue, Aug 18 Sunrise 05:54 Sunset 20:37
15:00
0% 11°C 0mm 79% 0cm 44° 15°C 0.19mm 0.35kPa 24135m 10m/s 7.6m/s
16:00
0% 11°C 0mm 79% 0cm 38° 14°C 0.31mm 0.35kPa 24135m 10m/s 7.4m/s
17:00
0% 11°C 0mm 78% 0cm 30° 14°C 0.38mm 0.35kPa 24135m 9.6m/s 6.6m/s
18:00
0% 11°C 0mm 80% 0cm 22° 14°C 0.44mm 0.32kPa 24134m 8.8m/s 4.6m/s
19:00
0% 11°C 0mm 82% 0cm 13° 14°C 0.5mm 0.28kPa 24135m 8.1m/s 3m/s
20:00
0% 11°C 0mm 85% 0cm 4.5° 13°C 0.13mm 0.22kPa 24135m 7.4m/s 2.2m/s
21:00 ☾
0% 11°C 0mm 89% 0cm -3.6° 12°C 0.19mm 0.15kPa 24134m 2m/s 1.9m/s
22:00 ☾
0% 11°C 0mm 92% 0cm -11° 12°C 0.31mm 0.11kPa 24134m 2.7m/s 2m/s
23:00 ☾
0% 11°C 0mm 90% 0cm -17° 12°C 0.38mm 0.14kPa 22758m 5.4m/s 1.8m/s
Wed, Aug 19 Sunrise 05:54 Sunset 20:37
24:00 ☾
0% 11°C 0.01mm 91% 0cm -21° 12°C 0.63mm 0.13kPa 19345m 6.5m/s 2.7m/s
01:00 ☾
0% 11°C 0mm 92% 0cm -22° 12°C 0.88mm 0.1kPa 21253m 3.6m/s 2.1m/s
02:00 ☾
0% 11°C 0mm 96% 0cm -22° 11°C 0.31mm 0.05kPa 14840m 3.2m/s 2.1m/s
03:00 ☾
0% 11°C 0mm 95% 0cm -19° 11°C 0.69mm 0.07kPa 21666m 4.5m/s 2.2m/s
04:00 ☾
0% 10°C 0mm 94% 0cm -14° 11°C 1.1mm 0.07kPa 20978m 4.7m/s 2.2m/s
05:00 ☾
0% 9.8°C 0mm 95% 0cm -7.8° 11°C 1.2mm 0.06kPa 24134m 2.8m/s 2m/s
06:00
0% 9.4°C 0mm 89% 0cm 0.26° 11°C 1.3mm 0.14kPa 22245m 3.4m/s 2.8m/s
07:00
0% 9.6°C 0mm 91% 0cm 8.1° 11°C 1.4mm 0.12kPa 22872m 3.3m/s 2.4m/s
08:00
11% 9.6°C 0mm 89% 0cm 17° 11°C 0.13mm 0.15kPa 23366m 5.9m/s 2.2m/s
09:00
23% 9.3°C 0mm 83% 0cm 25° 12°C 0.25mm 0.23kPa 23091m 4.8m/s 2.3m/s
10:00
34% 9.2°C 0mm 80% 0cm 33° 13°C 0.38mm 0.3kPa 22160m 4.7m/s 2.4m/s
11:00
30% 9.1°C 0mm 75% 0cm 40° 13°C 0.5mm 0.38kPa 22816m 5.3m/s 3.6m/s
12:00
25% 9°C 0mm 76% 0cm 46° 13°C 0.63mm 0.37kPa 24134m 5.9m/s 4.1m/s
13:00
21% 9.3°C 0mm 71% 0cm 48° 14°C 0.69mm 0.47kPa 24135m 6.2m/s 4.5m/s
14:00
24% 9.6°C 0mm 71% 0cm 47° 15°C 0.06mm 0.49kPa 22702m 6.7m/s 5.2m/s
15:00
28% 11°C 0mm 81% 0cm 43° 14°C 0.44mm 0.31kPa 10754m 7.1m/s 5.4m/s
16:00
31% 11°C 0mm 88% 0cm 37° 13°C 1mm 0.18kPa 12104m 6.1m/s 3.1m/s
17:00
29% 11°C 0mm 88% 0cm 30° 13°C 1.7mm 0.18kPa 10307m 4.9m/s 2.4m/s
18:00
28% 11°C 0mm 88% 0cm 21° 13°C 2.1mm 0.17kPa 17152m 3.3m/s 1.9m/s
19:00
26% 12°C 0.02mm 93% 0cm 13° 13°C 2.4mm 0.1kPa 23008m 4.1m/s 2.1m/s
20:00
26% 11°C 0mm 95% 0cm 4.2° 12°C 0.25mm 0.08kPa 19642m 2.7m/s 1.9m/s
21:00 ☾
25% 11°C 0mm 95% 0cm -4° 12°C 0.38mm 0.08kPa 24134m 2.2m/s 1.8m/s
22:00 ☾
25% 11°C 0mm 95% 0cm -11° 12°C 0.38mm 0.07kPa 24134m 1.7m/s 1.7m/s
23:00 ☾
22% 11°C 0.05mm 95% 0cm -17° 12°C 0.5mm 0.06kPa 18864m 1.4m/s 1.5m/s
Thu, Aug 20 Sunrise 05:56 Sunset 20:35
24:00 ☾
20% 11°C 0.42mm 96% 0cm -21° 12°C 1mm 0.05kPa 10155m 1.2m/s 1.3m/s
01:00 ☾
17% 11°C 0.77mm 97% 0cm -23° 12°C 1.9mm 0.04kPa 7386m 0.91m/s 1m/s
02:00 ☾
14% 11°C 0.94mm 98% 0cm -22° 11°C 1.3mm 0.03kPa 7847m 1m/s 1.1m/s
03:00 ☾
12% 11°C 0.44mm 98% 0cm -19° 12°C 2.4mm 0.03kPa 12181m 1.2m/s 1.2m/s
04:00 ☾
9% 11°C 0.22mm 98% 0cm -15° 11°C 2.9mm 0.03kPa 4796m 2.5m/s 2.2m/s
05:00 ☾
8% 11°C 0.34mm 98% 0cm -8.1° 11°C 3.6mm 0.03kPa 5374m 3.4m/s 2.6m/s
06:00
6% 11°C 1.2mm 98% 0cm 0.05° 11°C 4.6mm 0.03kPa 3487m 3.9m/s 2.8m/s
07:00
5% 10°C 0.38mm 96% 0cm 7.9° 11°C 5.4mm 0.06kPa 21564m 8.5m/s 3.4m/s
08:00
5% 9°C 0.07mm 93% 0cm 16° 10°C 0.19mm 0.09kPa 24134m 11m/s 4.3m/s
09:00
6% 9.1°C 0.19mm 93% 0cm 25° 10°C 0.25mm 0.09kPa 22911m 9.8m/s 3.7m/s
10:00
6% 9°C 0.72mm 94% 0cm 33° 10°C 0.81mm 0.08kPa 13206m 9.6m/s 4m/s
11:00
5% 8.6°C 0.41mm 93% 0cm 40° 9.6°C 1.6mm 0.08kPa 20607m 7.8m/s 3.5m/s
12:00
4% 8.2°C 0.03mm 89% 0cm 45° 10°C 1.8mm 0.13kPa 24135m 8.4m/s 3.4m/s
13:00
3% 8.5°C 0mm 78% 0cm 48° 12°C 1.8mm 0.32kPa 24135m 7.9m/s 4.3m/s
14:00
3% 8.3°C 0mm 70% 0cm 47° 14°C 0.06mm 0.47kPa 24134m 6.4m/s 3.8m/s
15:00
2% 8.4°C 0mm 73% 0cm 43° 13°C 0.06mm 0.41kPa 24134m 5.5m/s 3.5m/s
16:00
2% 8.7°C 0mm 75% 0cm 37° 13°C 0.13mm 0.38kPa 24135m 5.6m/s 3.6m/s
17:00
2% 8.3°C 0mm 70% 0cm 29° 14°C 0.25mm 0.47kPa 24134m 5.4m/s 3.4m/s
18:00
2% 8.1°C 0mm 68% 0cm 21° 14°C 0.31mm 0.5kPa 24135m 5.1m/s 2.8m/s
19:00
2% 8.8°C 0mm 75% 0cm 12° 13°C 0.44mm 0.37kPa 24134m 4.9m/s 2.3m/s
20:00
9% 7.2°C 0mm 78% 0cm 3.9° 11°C 0.29mm 0.29kPa 24134m 3.8m/s 2.1m/s
21:00 ☾
16% 5.6°C 0mm 81% 0cm -4.3° 8.7°C 0.15mm 0.22kPa 24135m 2.8m/s 1.9m/s
22:00 ☾
23% 4°C 0mm 84% 0cm -11° 6.5°C 0mm 0.16kPa 24135m 1.7m/s 1.7m/s
23:00 ☾
22% 4.4°C 0mm 83% 0cm -17° 7.1°C 0mm 0.17kPa 24135m 1.7m/s 1.7m/s
Fri, Aug 21 Sunrise 05:57 Sunset 20:32
24:00 ☾
20% 4.9°C 0mm 83% 0cm -21° 7.7°C 0mm 0.18kPa 24135m 1.7m/s 1.6m/s
01:00 ☾
19% 5.4°C 0mm 82% 0cm -23° 8.2°C 0mm 0.19kPa 24135m 1.6m/s 1.5m/s
02:00 ☾
18% 5.6°C 0mm 79% 0cm -23° 9°C 0mm 0.24kPa 24135m 1.7m/s 1.5m/s
03:00 ☾
17% 5.7°C 0mm 76% 0cm -20° 9.8°C 0mm 0.29kPa 24135m 1.8m/s 1.5m/s
04:00 ☾
16% 5.8°C 0mm 72% 0cm -15° 11°C 0mm 0.35kPa 24135m 1.9m/s 1.6m/s
05:00 ☾
17% 5.8°C 0mm 68% 0cm -8.3° 12°C 0.02mm 0.44kPa 24135m 2.1m/s 1.7m/s
06:00
17% 5.7°C 0mm 63% 0cm -0.32° 13°C 0.04mm 0.54kPa 24135m 2.2m/s 1.9m/s
07:00
18% 5.5°C 0mm 58% 0cm 7.7° 14°C 0.06mm 0.65kPa 24135m 2.3m/s 2.1m/s
08:00
23% 5.7°C 0mm 58% 0cm 16° 14°C 0.19mm 0.67kPa 23077m 2.3m/s 1.8m/s
09:00
27% 6°C 0mm 58% 0cm 25° 14°C 0.31mm 0.69kPa 22018m 2.2m/s 1.6m/s
10:00
32% 6.2°C 0mm 57% 0cm 33° 15°C 0.44mm 0.71kPa 20960m 2.1m/s 1.4m/s
11:00
31% 7°C 0.02mm 64% 0cm 40° 14°C 0.65mm 0.55kPa 22018m 1.9m/s 1.3m/s
12:00
30% 7.7°C 0.05mm 72% 0cm 45° 13°C 0.85mm 0.41kPa 23077m 1.6m/s 1.3m/s
13:00
29% 8.1°C 0.07mm 79% 0cm 47° 12°C 1.1mm 0.29kPa 24135m 1.3m/s 1.2m/s
14:00
20% 7.8°C 0.05mm 80% 0cm 47° 11°C 0.73mm 0.26kPa 24135m 1.2m/s 1.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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