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Rule Fog Hunter

Fog Hunter Forecast for Blea Tarn, Lake District

Chapel Stile, England, United Kingdom

Blea Tarn frames the Langdale Pikes beyond reeds, water and a distinctive shoreline pine, with reflections strongest during calm, sheltered conditions.

Currently

Real-time conditions
Fog Probability
69%
Dewpoint Spread0.2°C
Visibility617 (Fog)
Relative Humidity99%
Wind Speed2.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Fog
Blea Tarn
Today · 02:00–04:00 · 2h window
High confidence
100%
🌫️Fog Probability100%
Dewpoint Spread: 0.3°C
Visibility: 797 (Fog)
Relative Humidity: 98%
Wind Speed: 1.9m/s (calm conditions)

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 Blea Tarn.

Explore Fog Hunter conditions across Lake District →

Recorded match history

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

Last 30 days
6
recorded matching windows · 80% average confidence
Last 90 days
41
recorded matching windows · 75% average confidence
Last 365 days
41
recorded matching windows · 75% average confidence
Most frequent recorded start hour

04:00 local time, shared by 10 of 40 matches recorded in the last 365 days.

Most represented month

June, with 22 of 40 matches recorded in the last 365 days.

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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92-hour requirements breakdown

When available, the detailed table below covers only the stated 92-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
4matching hours in the next 92 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Sat, Jul 25
06:0055%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:0077%
15:0077%
16:0069%
17:0044%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Sun, Jul 26
24:0055%
01:0060%
02:00100%
03:00100%
04:0068%
05:0058%
06:0037%
07:000%
08:0059%
09:0029%
10:0029%
11:0016%
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, Jul 27
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%
19:0069%
20:0067%
21:0067%
22:0069%
23:0069%
Tue, Jul 28
24:0069%
01:0069%
02:0069%
03:0069%
04:0068%
05:0068%
06:0067%
07:0066%
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%
Wed, Jul 29
24:000%
01:000%
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
Sun, Jul 26 Sunrise 05:13 Sunset 21:22
03:00 ☾
0% 12°C 0.09mm 99% 0cm -13° 12°C 0.06mm 0.02kPa 617m 2.4m/s 2m/s
04:00 ☾
0% 12°C 0.49mm 99% 0cm -8.4° 12°C 0.5mm 0.01kPa 252m 5.4m/s 2.1m/s
05:00 ☾
0% 13°C 0.18mm 98% 0cm -2.2° 13°C 0.81mm 0.02kPa 321m 9.3m/s 2.9m/s
06:00
0% 13°C 0.03mm 97% 0cm 5.1° 13°C 0.94mm 0.05kPa 733m 10m/s 3.6m/s
07:00
0% 13°C 0.12mm 96% 0cm 13° 13°C 1.1mm 0.05kPa 10113m 10m/s 3.4m/s
08:00
0% 12°C 0.02mm 97% 0cm 22° 13°C 0.06mm 0.05kPa 641m 9.9m/s 3.7m/s
09:00
0% 12°C 0.02mm 96% 0cm 30° 13°C 0.13mm 0.05kPa 10057m 10m/s 3.8m/s
10:00
0% 12°C 0.01mm 96% 0cm 39° 13°C 0.19mm 0.06kPa 10750m 11m/s 4.3m/s
11:00
0% 12°C 0.02mm 96% 0cm 46° 12°C 0.25mm 0.06kPa 10876m 11m/s 4.4m/s
12:00
0% 12°C 0mm 95% 0cm 52° 13°C 0.25mm 0.08kPa 4323m 11m/s 4.3m/s
13:00
0% 12°C 0mm 93% 0cm 55° 13°C 0.31mm 0.11kPa 10823m 11m/s 4.5m/s
14:00
4% 12°C 0mm 94% 0cm 54° 13°C 0.06mm 0.08kPa 12324m 12m/s 5m/s
15:00
7% 12°C 0mm 93% 0cm 50° 13°C 0.19mm 0.1kPa 24135m 13m/s 7.1m/s
16:00
11% 12°C 0mm 92% 0cm 43° 13°C 0.25mm 0.12kPa 24135m 13m/s 7.8m/s
17:00
17% 12°C 0mm 90% 0cm 36° 13°C 0.38mm 0.16kPa 24135m 13m/s 8.4m/s
18:00
22% 11°C 0mm 89% 0cm 27° 13°C 0.44mm 0.17kPa 24135m 13m/s 7.9m/s
19:00
28% 11°C 0mm 88% 0cm 18° 13°C 0.5mm 0.18kPa 24134m 12m/s 6.8m/s
20:00
45% 10°C 0mm 86% 0cm 9.9° 13°C 0mm 0.2kPa 24134m 11m/s 4.6m/s
21:00
63% 10°C 0mm 88% 0cm 2.2° 12°C 0.06mm 0.17kPa 24134m 12m/s 4.5m/s
22:00 ☾
80% 9.7°C 0mm 85% 0cm -4.9° 12°C 0.06mm 0.21kPa 24135m 11m/s 4.9m/s
23:00 ☾
80% 9.8°C 0mm 87% 0cm -11° 12°C 0.13mm 0.18kPa 24134m 10m/s 4.3m/s
Mon, Jul 27 Sunrise 05:13 Sunset 21:22
24:00 ☾
80% 9.9°C 0mm 88% 0cm -14° 12°C 0.13mm 0.17kPa 24135m 9.7m/s 3.5m/s
01:00 ☾
80% 10°C 0mm 92% 0cm -16° 12°C 0.19mm 0.11kPa 24134m 9.8m/s 3.5m/s
02:00 ☾
69% 10°C 0mm 90% 0cm -16° 12°C 0.06mm 0.14kPa 24135m 9.6m/s 3.6m/s
03:00 ☾
57% 10°C 0mm 93% 0cm -13° 11°C 0.06mm 0.1kPa 24135m 9.3m/s 2.7m/s
04:00 ☾
46% 9.5°C 0mm 90% 0cm -8.6° 11°C 0.13mm 0.14kPa 24135m 8.9m/s 2.8m/s
05:00 ☾
37% 9.4°C 0mm 90% 0cm -2.4° 11°C 0.19mm 0.14kPa 24134m 9.5m/s 2.7m/s
06:00
27% 9.3°C 0mm 89% 0cm 4.9° 11°C 0.19mm 0.14kPa 24134m 9.2m/s 2.7m/s
07:00
18% 9.3°C 0mm 87% 0cm 13° 11°C 0.19mm 0.18kPa 24134m 8.6m/s 2.6m/s
08:00
12% 8.8°C 0mm 80% 0cm 21° 12°C 0mm 0.28kPa 24135m 8.6m/s 3.7m/s
09:00
6% 9.1°C 0mm 78% 0cm 30° 13°C 0mm 0.33kPa 24135m 8.7m/s 4.4m/s
10:00
0% 9.7°C 0mm 78% 0cm 39° 13°C 0.06mm 0.34kPa 24135m 9m/s 5.3m/s
11:00
0% 11°C 0mm 81% 0cm 46° 14°C 0.13mm 0.3kPa 24134m 8.8m/s 5.7m/s
12:00
0% 11°C 0mm 78% 0cm 52° 14°C 0.19mm 0.35kPa 24135m 8.8m/s 6.2m/s
13:00
0% 11°C 0mm 77% 0cm 55° 15°C 0.25mm 0.39kPa 24134m 8.5m/s 6.1m/s
14:00
2% 11°C 0mm 75% 0cm 54° 15°C 0.06mm 0.43kPa 24135m 7.7m/s 4.9m/s
15:00
4% 11°C 0mm 79% 0cm 50° 14°C 0.06mm 0.35kPa 24135m 6.6m/s 3.4m/s
16:00
6% 11°C 0.02mm 80% 0cm 43° 14°C 0.13mm 0.33kPa 24134m 6.5m/s 2.8m/s
17:00
5% 12°C 0.01mm 87% 0cm 35° 14°C 0.13mm 0.19kPa 10260m 7m/s 2.3m/s
18:00
4% 12°C 0.01mm 93% 0cm 27° 13°C 0.13mm 0.1kPa 9923m 7.9m/s 2.6m/s
19:00
3% 12°C 0.05mm 97% 0cm 18° 13°C 0.19mm 0.04kPa 317m 3.9m/s 2.3m/s
20:00
4% 13°C 0.03mm 99% 0cm 9.7° 13°C 0.25mm 0.02kPa 232m 2.8m/s 2.2m/s
21:00
4% 13°C 0.05mm 99% 0cm 2.1° 13°C 0.31mm 0.02kPa 126m 3.1m/s 2.3m/s
22:00 ☾
5% 13°C 0.03mm 99% 0cm -5.1° 13°C 0.31mm 0.01kPa 88m 3.1m/s 2.3m/s
23:00 ☾
3% 14°C 0.11mm 99% 0cm -11° 14°C 0.56mm 0.01kPa 85m 3.1m/s 2.3m/s
Tue, Jul 28 Sunrise 05:15 Sunset 21:20
24:00 ☾
2% 14°C 0.38mm 99% 0cm -15° 14°C 0.63mm 0.01kPa 78m 3.2m/s 2.2m/s
01:00 ☾
0% 15°C 0.07mm 99% 0cm -16° 15°C 0.88mm 0.01kPa 93m 2.6m/s 1.9m/s
02:00 ☾
0% 15°C 0.01mm 99% 0cm -16° 15°C 0.06mm 0.01kPa 99m 2.4m/s 1.8m/s
03:00 ☾
0% 15°C 0.29mm 99% 0cm -13° 15°C 0.19mm 0.01kPa 100m 2.1m/s 1.7m/s
04:00 ☾
0% 15°C 0.01mm 99% 0cm -8.9° 15°C 0.69mm 0.01kPa 120m 1.8m/s 1.6m/s
05:00 ☾
0% 15°C 0mm 99% 0cm -2.6° 15°C 0.75mm 0.02kPa 170m 1.5m/s 1.4m/s
06:00
0% 15°C 0mm 99% 0cm 4.7° 15°C 0.75mm 0.02kPa 417m 1.6m/s 1.5m/s
07:00
0% 15°C 0mm 99% 0cm 13° 15°C 0.81mm 0.02kPa 562m 2.1m/s 1.7m/s
08:00
0% 15°C 0.01mm 91% 0cm 21° 17°C 0.69mm 0.16kPa 8420m 3.7m/s 2.4m/s
09:00
0% 16°C 0.02mm 84% 0cm 30° 18°C 0.56mm 0.35kPa 16277m 5.3m/s 3.1m/s
10:00
0% 16°C 0.03mm 76% 0cm 38° 20°C 0.44mm 0.57kPa 24135m 6.9m/s 3.8m/s
11:00
0% 16°C 0.02mm 76% 0cm 46° 20°C 0.44mm 0.55kPa 24135m 5.9m/s 3.3m/s
12:00
0% 15°C 0.01mm 77% 0cm 51° 20°C 0.44mm 0.53kPa 24135m 4.9m/s 2.8m/s
13:00
0% 15°C 0mm 78% 0cm 54° 19°C 0.44mm 0.51kPa 24135m 3.9m/s 2.3m/s
14:00
1% 15°C 0mm 83% 0cm 54° 18°C 0.29mm 0.35kPa 24135m 3.4m/s 2.3m/s
15:00
1% 15°C 0mm 89% 0cm 50° 17°C 0.15mm 0.21kPa 24135m 3m/s 2.2m/s
16:00
2% 14°C 0mm 94% 0cm 43° 15°C 0mm 0.1kPa 24135m 2.6m/s 2.2m/s
17:00
2% 14°C 0mm 94% 0cm 35° 15°C 0mm 0.11kPa 24135m 2.4m/s 2.2m/s
18:00
3% 14°C 0mm 93% 0cm 27° 15°C 0mm 0.12kPa 24135m 2.3m/s 2.2m/s
19:00
3% 14°C 0mm 92% 0cm 18° 15°C 0mm 0.13kPa 24135m 2.2m/s 2.2m/s
20:00
5% 13°C 0mm 93% 0cm 9.5° 15°C 0mm 0.12kPa 24135m 2.1m/s 2.1m/s
21:00
7% 13°C 0mm 93% 0cm 1.9° 14°C 0mm 0.12kPa 24135m 2m/s 2m/s
22:00 ☾
9% 13°C 0mm 93% 0cm -5.3° 14°C 0mm 0.11kPa 24135m 1.9m/s 1.9m/s
23:00 ☾
7% 13°C 0mm 92% 0cm -11° 15°C 0mm 0.14kPa 24135m 2.2m/s 1.9m/s
Wed, Jul 29 Sunrise 05:17 Sunset 21:19
24:00 ☾
5% 14°C 0mm 90% 0cm -15° 15°C 0mm 0.17kPa 24135m 2.4m/s 1.9m/s
01:00 ☾
3% 14°C 0mm 88% 0cm -17° 16°C 0mm 0.21kPa 24135m 2.7m/s 1.9m/s
02:00 ☾
3% 15°C 0mm 84% 0cm -16° 17°C 0mm 0.31kPa 24135m 3.2m/s 2.3m/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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