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Rule Fog Hunter

Fog Hunter Forecast for Vesijärvi, Southern Finland

Lahti, Päijänne Tavastia, Finland

Vesijärvi presents broad water and island horizons beside Lahti, with sheltered bays for reflections and autumn fog over reed-lined shores.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread2.3°C
Visibility24135 (Clear)
Relative Humidity86%
Wind Speed3.9m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Fog Potential at Sunrise
Vesijärvi
Tomorrow · 04:00–06:00 · 2h window
Low confidence
29%
🌫️Fog Probability75.8%
Dewpoint Spread: 0.2°C
Visibility: 24135 (Clear)
Relative Humidity: 99%
Wind Speed: 1.9m/s (calm conditions)
fog weather icon
Fog Potential
Vesijärvi
Tomorrow · 06:00–07:00
🌫️Fog Probability:75.8%
Medium
fog weather icon
Fog Potential
Vesijärvi
Tue, Jul 28 · 01:00–03:00
🌫️Fog Probability:75.8%
Low

How this forecast is evaluated

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

Explore Fog Hunter conditions across Southern Finland →

Recorded match history

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

Last 30 days
1
recorded matching window · 95% average confidence
Last 90 days
5
recorded matching windows · 84% average confidence
Last 365 days
5
recorded matching windows · 84% average confidence

Only 5 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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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
5matching hours in the next 92 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 75.0%
Sat, Jul 25
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, Jul 26
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:0014%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0048%
23:000%
Mon, Jul 27
24:000%
01:000%
02:000%
03:000%
04:0076%
05:0076%
06:0076%
07:0041%
08:0036%
09:0028%
10:0028%
11:0022%
12:000%
13:000%
14:000%
15:000%
16:000%
17:0024%
18:0031%
19:000%
20:000%
21:000%
22:0073%
23:0073%
Tue, Jul 28
24:0073%
01:0076%
02:0076%
03:0046%
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%
Wed, Jul 29
24:000%
01:000%
02:000%
03:000%
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/Helsinki
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 04:36 Sunset 22:09
05:00
0% 12°C 0mm 86% 0cm 1.6° 14°C 0mm 0.22kPa 24135m 11m/s 3.9m/s
06:00
0% 12°C 0mm 86% 0cm 7.4° 15°C 0mm 0.23kPa 24135m 11m/s 4.4m/s
07:00
0% 13°C 0.05mm 84% 0cm 14° 15°C 0mm 0.27kPa 24135m 11m/s 4.7m/s
08:00
0% 13°C 0.04mm 90% 0cm 21° 15°C 0.19mm 0.16kPa 24135m 12m/s 4.9m/s
09:00
0% 13°C 0.49mm 90% 0cm 29° 15°C 0.25mm 0.17kPa 17357m 11m/s 5m/s
10:00
0% 14°C 0.01mm 95% 0cm 35° 14°C 0.38mm 0.09kPa 24134m 12m/s 5.1m/s
11:00
0% 14°C 0mm 92% 0cm 41° 15°C 0.44mm 0.13kPa 24135m 11m/s 5.1m/s
12:00
0% 14°C 0.01mm 91% 0cm 46° 16°C 0.63mm 0.17kPa 23684m 11m/s 5.3m/s
13:00
0% 14°C 0.31mm 90% 0cm 48° 16°C 0.75mm 0.19kPa 23598m 11m/s 5.1m/s
14:00
0% 14°C 0mm 91% 0cm 48° 15°C 0.88mm 0.15kPa 24134m 12m/s 4.4m/s
15:00
0% 14°C 0mm 90% 0cm 45° 16°C 0.88mm 0.17kPa 24134m 11m/s 4.8m/s
16:00
0% 14°C 0mm 87% 0cm 40° 16°C 0mm 0.24kPa 24134m 12m/s 4.6m/s
17:00
0% 14°C 0.01mm 75% 0cm 34° 18°C 0mm 0.52kPa 24135m 12m/s 5.2m/s
18:00
0% 14°C 0.03mm 76% 0cm 27° 18°C 0.06mm 0.5kPa 24135m 12m/s 4.7m/s
19:00
0% 14°C 0.32mm 89% 0cm 20° 16°C 0.38mm 0.2kPa 22973m 12m/s 4.7m/s
20:00
0% 14°C 0.92mm 94% 0cm 13° 15°C 0.69mm 0.11kPa 11069m 12m/s 5m/s
21:00
0% 14°C 0mm 96% 0cm 6° 15°C 1mm 0.07kPa 24134m 12m/s 4.2m/s
22:00
2% 14°C 0.02mm 96% 0cm 0.52° 15°C 0mm 0.06kPa 24134m 11m/s 3.3m/s
23:00 ☾
5% 15°C 1mm 97% 0cm -4.6° 15°C 0.38mm 0.05kPa 11263m 10m/s 3.6m/s
Mon, Jul 27 Sunrise 04:36 Sunset 22:09
24:00 ☾
7% 15°C 0.42mm 97% 0cm -7.9° 15°C 1.6mm 0.04kPa 21607m 11m/s 3.7m/s
01:00 ☾
5% 15°C 0mm 97% 0cm -9.6° 15°C 1.6mm 0.05kPa 24134m 10m/s 3.5m/s
02:00 ☾
4% 14°C 0mm 98% 0cm -9.4° 15°C 1.6mm 0.04kPa 24135m 9.2m/s 3m/s
03:00 ☾
2% 14°C 0mm 99% 0cm -7.4° 14°C 1.6mm 0.02kPa 24134m 8.5m/s 2.2m/s
04:00 ☾
2% 13°C 0mm 99% 0cm -3.8° 13°C 0mm 0.02kPa 24135m 6.4m/s 1.9m/s
05:00
2% 13°C 0mm 99% 0cm 1.4° 13°C 0mm 0.02kPa 21831m 5.2m/s 1.8m/s
06:00
2% 14°C 0mm 99% 0cm 7.2° 14°C 0mm 0.02kPa 21490m 6m/s 1.7m/s
07:00
1% 14°C 0.24mm 98% 0cm 14° 15°C 0.19mm 0.02kPa 23160m 6m/s 1.8m/s
08:00
1% 14°C 0.02mm 99% 0cm 21° 15°C 0.25mm 0.02kPa 24134m 6.6m/s 1.9m/s
09:00
0% 15°C 0.79mm 98% 0cm 28° 15°C 0.63mm 0.03kPa 12555m 7.8m/s 2.3m/s
10:00
0% 15°C 0.33mm 98% 0cm 35° 15°C 0.44mm 0.03kPa 15926m 8.9m/s 3.1m/s
11:00
1% 15°C 0.2mm 97% 0cm 41° 15°C 0.81mm 0.05kPa 24051m 8.6m/s 3.2m/s
12:00
1% 15°C 0.37mm 98% 0cm 46° 15°C 1.1mm 0.04kPa 20598m 9m/s 3.2m/s
13:00
1% 15°C 0.2mm 98% 0cm 48° 15°C 1.5mm 0.04kPa 23682m 8.1m/s 3.1m/s
14:00
0% 16°C 0mm 91% 0cm 48° 17°C 1.7mm 0.18kPa 24135m 6.9m/s 3.7m/s
15:00
0% 16°C 0mm 85% 0cm 45° 18°C 2.1mm 0.31kPa 10300m 6.4m/s 4.1m/s
16:00
0% 16°C 0.02mm 90% 0cm 40° 18°C 0.63mm 0.21kPa 11255m 6.5m/s 3.9m/s
17:00
1% 15°C 0.02mm 96% 0cm 34° 16°C 0.88mm 0.07kPa 24135m 5.6m/s 2.4m/s
18:00
1% 15°C 0mm 98% 0cm 27° 15°C 0.88mm 0.04kPa 24134m 5.8m/s 2.3m/s
19:00
1% 15°C 0.25mm 98% 0cm 20° 15°C 1.2mm 0.03kPa 23757m 3.2m/s 1.4m/s
20:00
0% 15°C 0mm 96% 0cm 12° 16°C 1.2mm 0.06kPa 24134m 2.2m/s 1.1m/s
21:00
0% 15°C 0mm 98% 0cm 5.8° 15°C 1.3mm 0.03kPa 24135m 0.31m/s 0.29m/s
22:00
0% 14°C 0mm 99% 0cm 0.34° 14°C 0mm 0.02kPa 24134m 0.31m/s 0.33m/s
23:00 ☾
1% 13°C 0mm 99% 0cm -4.8° 14°C 0mm 0.02kPa 24134m 0.9m/s 0.9m/s
Tue, Jul 28 Sunrise 04:38 Sunset 22:07
24:00 ☾
1% 14°C 0.04mm 99% 0cm -8.2° 14°C 0mm 0.02kPa 24134m 1.2m/s 1.2m/s
01:00 ☾
1% 14°C 0.09mm 99% 0cm -9.8° 14°C 0.13mm 0.02kPa 24135m 2.4m/s 1.4m/s
02:00 ☾
0% 14°C 0.04mm 99% 0cm -9.6° 14°C 0.13mm 0.02kPa 24135m 3.8m/s 1.7m/s
03:00 ☾
0% 14°C 0.81mm 99% 0cm -7.6° 14°C 0.5mm 0.01kPa 10702m 5.4m/s 2.1m/s
04:00 ☾
1% 14°C 4.3mm 99% 0cm -4° 14°C 3.1mm 0.01kPa 2807m 7.6m/s 2.4m/s
05:00
1% 15°C 9.8mm 99% 0cm 1.3° 15°C 8.9mm 0.01kPa 341m 6.6m/s 1.9m/s
06:00
2% 15°C 5.3mm 99% 0cm 7° 15°C 16mm 0.01kPa 406m 3.6m/s 0.42m/s
07:00
2% 14°C 0.59mm 99% 0cm 14° 14°C 18mm 0.02kPa 281m 3.5m/s 2.2m/s
08:00
3% 13°C 0.4mm 98% 0cm 21° 13°C 19mm 0.03kPa 5079m 7.6m/s 4m/s
09:00
3% 12°C 0.37mm 97% 0cm 28° 13°C 19mm 0.04kPa 5005m 10m/s 5.6m/s
10:00
6% 12°C 1.2mm 97% 0cm 35° 13°C 15mm 0.04kPa 5127m 11m/s 5.7m/s
11:00
10% 13°C 2.1mm 97% 0cm 41° 13°C 12mm 0.04kPa 5248m 12m/s 5.7m/s
12:00
13% 13°C 2.9mm 97% 0cm 45° 13°C 7.6mm 0.05kPa 5370m 12m/s 5.7m/s
13:00
14% 13°C 2.4mm 97% 0cm 48° 13°C 9.4mm 0.05kPa 7968m 13m/s 5.9m/s
14:00
14% 12°C 1.9mm 97% 0cm 47° 13°C 11mm 0.05kPa 10567m 14m/s 6m/s
15:00
15% 12°C 1.4mm 97% 0cm 45° 13°C 13mm 0.05kPa 13166m 14m/s 6.2m/s
16:00
12% 12°C 1.5mm 97% 0cm 40° 13°C 10mm 0.05kPa 11293m 14m/s 6.3m/s
17:00
10% 12°C 1.7mm 97% 0cm 34° 13°C 7.9mm 0.05kPa 9419m 14m/s 6.3m/s
18:00
7% 12°C 1.8mm 96% 0cm 27° 13°C 5.4mm 0.05kPa 7545m 15m/s 6.4m/s
19:00
8% 12°C 1.6mm 96% 0cm 19° 13°C 7mm 0.05kPa 8908m 15m/s 6.4m/s
20:00
8% 12°C 1.5mm 96% 0cm 12° 12°C 8.7mm 0.05kPa 10271m 15m/s 6.3m/s
21:00
9% 12°C 1.4mm 96% 0cm 5.6° 12°C 10mm 0.06kPa 11633m 15m/s 6.3m/s
22:00
14% 12°C 3.1mm 97% 0cm 0.16° 12°C 9.2mm 0.05kPa 8640m 15m/s 6.2m/s
23:00 ☾
19% 12°C 4.8mm 97% 0cm -5.1° 13°C 8.1mm 0.04kPa 5646m 14m/s 6m/s
Wed, Jul 29 Sunrise 04:41 Sunset 22:04
24:00 ☾
24% 12°C 6.6mm 97% 0cm -8.4° 13°C 6.9mm 0.04kPa 2652m 14m/s 5.9m/s
01:00 ☾
23% 12°C 5.3mm 97% 0cm -10° 13°C 9mm 0.04kPa 4300m 14m/s 5.8m/s
02:00 ☾
22% 12°C 4.1mm 97% 0cm -9.9° 12°C 11mm 0.04kPa 5948m 13m/s 5.7m/s
03:00 ☾
21% 12°C 2.8mm 97% 0cm -7.9° 12°C 13mm 0.04kPa 7595m 13m/s 5.6m/s
04:00 ☾
22% 12°C 2.3mm 97% 0cm -4.2° 12°C 11mm 0.04kPa 8958m 13m/s 5.4m/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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