What conditions does Fog Hunter look for?

Fog Probability: ≥ 85.0%. Dewpoint Spread: ≤ 2.0°C. Visibility: ≤ 3000.0m. Wind Speed: ≤ 2.0m/s

How often do conditions match?

There are 4 upcoming opportunity windows in the next 10 days.

More Fog Hunter in Southern Finland

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Rule Fog Hunter

Liesjärvi - Fog Hunter - Southern Finland

Liesjärven Kansallispuisto, Kanta-Häme, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions

Fog Probability

51%

Dewpoint Spread0.8°C

Visibility24134 (Clear)

Relative Humidity94%

Wind Speed3.4m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

Next opportunity

Dense Fog (lingering)

Liesjärvi

Mon, Feb 9 · 23:00–24:00 · 1h window

Medium confidence

54%

🌫️Fog Probability97.2%

Dewpoint Spread: 0.2°C

Visibility: 2961 (Mist/Haze)

Relative Humidity: 98%

Wind Speed: 1.4m/s (calm conditions)

Dense Fog (lingering) at Sunset

Liesjärvi

Sat, Feb 14 · 17:00–18:00

🌫️Fog Probability:100%

Medium

Dense Fog (lingering)

Liesjärvi

Sat, Feb 14 · 18:00–24:00

🌫️Fog Probability:100%

Medium

Dense Fog (lingering)

Liesjärvi

Tue, Feb 17 · 01:00–03:00

🌫️Fog Probability:94.4-100%

Low

What this forecast looks for

Plain-language explanation from the rule

Southern Finland's lake district and boreal forests create ideal conditions for fog photography. The region's 188,000 lakes, countless bogs, and mixed forests generate reliable morning mist from late summer through autumn.

What makes Southern Finland special for fog photography:

Lake fog - Large lakes like Vesijärvi and Saimaa produce dramatic ground fog at dawn
Bog mist - Torronsuo and other wetlands create ethereal low-lying fog over boardwalks
Forest atmosphere - Nuuksio and Repovesi offer misty woodland scenes with cliff viewpoints
Accessibility - Most locations within 2 hours of Helsinki

Peak fog season runs from August through October, with the strongest conditions occurring on calm, clear nights when temperatures drop near the dewpoint. Arrive before sunrise for the most dramatic mist.

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72-hour requirements breakdown

What passed or failed, hour by hour

1matching hours in the next 72 hoursJump to next match

AND logic: all conditions required

Meets requirement

Misses requirement

Time Europe/Helsinki	Fog Probability ≥ 85.0%	Dewpoint Spread ≤ 2.0°C	Visibility ≤ 3000.0m	Wind Speed ≤ 2.0m/s
Sat, Feb 7
20:00	51%	0.9°C	24134m	3.5m/s
21:00	51%	0.8°C	24134m	3.4m/s
22:00	51%	0.7°C	24134m	3.1m/s
23:00	54%	0.6°C	24134m	2.7m/s
Sun, Feb 8
24:00	57%	0.5°C	23067m	2.5m/s
01:00	75%	0.4°C	13588m	2.2m/s
02:00	75%	0.3°C	13598m	2.1m/s
03:00	75%	0.3°C	13582m	2m/s
04:00	78%	0.2°C	13390m	1.8m/s
05:00	78%	0.1°C	13400m	1.7m/s
06:00	78%	0°C	13197m	1.5m/s
07:00	78%	0°C	13222m	1.6m/s
08:00	78%	0°C	11919m	1.3m/s
09:00	78%	0.1°C	12373m	1.3m/s
10:00	0%	1.1°C	24135m	0.97m/s
11:00	0%	2.2°C	24134m	0.39m/s
12:00	0%	3.1°C	24134m	0.83m/s
13:00	0%	3.6°C	24134m	1.2m/s
14:00	0%	3.6°C	24134m	1.5m/s
15:00	0%	2.5°C	24135m	1.6m/s
16:00	60%	0.9°C	24134m	1.3m/s
17:00	64%	0.5°C	24135m	1.4m/s
18:00	67%	0.4°C	20595m	1.5m/s
19:00	75%	0.3°C	13621m	1.6m/s
20:00	67%	0.5°C	24135m	1.9m/s
21:00	83%	0.3°C	6992m	1.9m/s
22:00	86%	0.2°C	6549m	2m/s
23:00	73%	0.2°C	6549m	2.3m/s
Mon, Feb 9
24:00	71%	0.4°C	6701m	2.4m/s
01:00	68%	0.5°C	8518m	2.5m/s
02:00	57%	0.5°C	24135m	2.5m/s
03:00	54%	0.5°C	24134m	2.6m/s
04:00	54%	0.6°C	24135m	2.8m/s
05:00	54%	0.6°C	23993m	3m/s
06:00	51%	0.8°C	24101m	3.4m/s
07:00	0%	1.1°C	24134m	4m/s
08:00	0%	1.1°C	23154m	4.2m/s
09:00	0%	1.1°C	9854m	4.2m/s
10:00	0%	1.3°C	5021m	4.5m/s
11:00	56%	1.3°C	1767m	4.7m/s
12:00	47%	1.9°C	2108m	5.4m/s
13:00	46%	2.2°C	1908m	5.1m/s
14:00	54%	1.6°C	1720m	4.7m/s
15:00	47%	1.5°C	2358m	4.7m/s
16:00	56%	1.3°C	1900m	4.5m/s
17:00	56%	1°C	1485m	4.1m/s
18:00	84%	1°C	1892m	3.8m/s
19:00	74%	0.8°C	2219m	3.6m/s
20:00	84%	0.8°C	1800m	3.1m/s
21:00	87%	0.5°C	1394m	2.8m/s
22:00	100%	0.4°C	1694m	2.2m/s
23:00	97%	0.2°C	2961m	1.4m/s
Tue, Feb 10
24:00	86%	0.1°C	5608m	1m/s
01:00	86%	0.1°C	6284m	0.74m/s
02:00	86%	0.2°C	6247m	0.47m/s
03:00	75%	0.4°C	12210m	1.1m/s
04:00	60%	0.7°C	18172m	1.8m/s
05:00	0%	1°C	24135m	2.4m/s
06:00	0%	1.4°C	24135m	2.5m/s
07:00	0%	1.6°C	24135m	2.5m/s
08:00	0%	1.9°C	24135m	2.6m/s
09:00	0%	1.4°C	19712m	2.1m/s
10:00	60%	0.8°C	15290m	1.6m/s
11:00	75%	0.4°C	10867m	1m/s
12:00	83%	0.3°C	9484m	1m/s
13:00	73%	0.3°C	8101m	1m/s
14:00	86%	0.2°C	6718m	0.99m/s
15:00	86%	0.2°C	6663m	0.87m/s
16:00	86%	0.1°C	6608m	0.75m/s
17:00	86%	0.2°C	6553m	0.63m/s
18:00	86%	0.2°C	5867m	0.69m/s
19:00	86%	0.2°C	5181m	0.74m/s

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	Dew Point °C	Rainfall mm	Relative Humidity %	Snowfall cm	Temperature °C	Total Precipitation mm	Vapor Pressure Deficit kPa	Wind Gusts m/s
Sat, Feb 7 Sunrise 08:27 Sunset 16:50
21:00 ☾	-14°C	0mm	94%	0cm	-13°C	0mm	0.01kPa	12m/s
22:00 ☾	-14°C	0mm	94%	0cm	-14°C	0mm	0.01kPa	11m/s
23:00 ☾	-15°C	0mm	95%	0cm	-15°C	0mm	0.01kPa	9.7m/s
Sun, Feb 8 Sunrise 08:27 Sunset 16:50
24:00 ☾	-16°C	0mm	96%	0cm	-15°C	0mm	0.01kPa	7.9m/s
01:00 ☾	-16°C	0mm	97%	0cm	-16°C	0mm	0.01kPa	6.8m/s
02:00 ☾	-17°C	0mm	97%	0cm	-17°C	0mm	0kPa	5.6m/s
03:00 ☾	-17°C	0mm	98%	0cm	-17°C	0mm	0kPa	4.9m/s
04:00 ☾	-18°C	0mm	98%	0cm	-17°C	0mm	0kPa	4m/s
05:00 ☾	-18°C	0mm	99%	0cm	-18°C	0mm	0kPa	2.2m/s
06:00 ☾	-19°C	0mm	100%	0cm	-19°C	0mm	0kPa	1.4m/s
07:00 ☾	-19°C	0mm	100%	0cm	-19°C	0mm	0kPa	1.5m/s
08:00 ☾	-19°C	0mm	100%	0cm	-19°C	0mm	0kPa	1.2m/s
09:00	-19°C	0mm	100%	0cm	-19°C	0mm	0kPa	1.2m/s
10:00	-14°C	0mm	92%	0cm	-13°C	0mm	0.02kPa	0.92m/s
11:00	-12°C	0mm	84%	0cm	-10°C	0mm	0.05kPa	0.62m/s
12:00	-11°C	0mm	78%	0cm	-8.4°C	0mm	0.07kPa	1.2m/s
13:00	-11°C	0mm	75%	0cm	-7.5°C	0mm	0.09kPa	1.9m/s
14:00	-11°C	0mm	75%	0cm	-7.2°C	0mm	0.09kPa	2.5m/s
15:00	-10°C	0mm	82%	0cm	-7.7°C	0mm	0.06kPa	3.3m/s
16:00	-11°C	0mm	93%	0cm	-10°C	0mm	0.02kPa	1.2m/s
17:00 ☾	-14°C	0mm	96%	0cm	-14°C	0mm	0.01kPa	1.3m/s
18:00 ☾	-15°C	0mm	97%	0cm	-15°C	0mm	0.01kPa	1.5m/s
19:00 ☾	-16°C	0mm	98%	0cm	-15°C	0mm	0kPa	1.7m/s
20:00 ☾	-15°C	0mm	96%	0cm	-15°C	0mm	0.01kPa	4.6m/s
21:00 ☾	-15°C	0mm	97%	0cm	-15°C	0mm	0.01kPa	5.5m/s
22:00 ☾	-14°C	0mm	99%	0cm	-14°C	0mm	0kPa	6.9m/s
23:00 ☾	-14°C	0mm	98%	0cm	-14°C	0mm	0kPa	8.2m/s
Mon, Feb 9 Sunrise 08:24 Sunset 16:53
24:00 ☾	-13°C	0mm	97%	0cm	-13°C	0mm	0.01kPa	9.6m/s
01:00 ☾	-13°C	0mm	96%	0cm	-13°C	0mm	0.01kPa	11m/s
02:00 ☾	-13°C	0mm	96%	0cm	-12°C	0mm	0.01kPa	11m/s
03:00 ☾	-13°C	0mm	96%	0cm	-12°C	0mm	0.01kPa	12m/s
04:00 ☾	-12°C	0mm	96%	0cm	-12°C	0mm	0.01kPa	13m/s
05:00 ☾	-11°C	0mm	95%	0cm	-11°C	0mm	0.01kPa	13m/s
06:00 ☾	-11°C	0mm	94%	0cm	-10°C	0mm	0.02kPa	15m/s
07:00 ☾	-10°C	0mm	92%	0cm	-9°C	0mm	0.03kPa	15m/s
08:00 ☾	-9.7°C	0mm	92%	0cm	-8.6°C	0mm	0.03kPa	15m/s
09:00	-9.1°C	0.01mm	92%	0cm	-8°C	0mm	0.03kPa	15m/s
10:00	-8.1°C	0.02mm	91%	0cm	-6.8°C	0mm	0.03kPa	14m/s
11:00	-7.5°C	0.03mm	90%	0.03cm	-6.2°C	0mm	0.04kPa	13m/s
12:00	-7.7°C	0.04mm	86%	0.04cm	-5.8°C	0.06mm	0.06kPa	12m/s
13:00	-7.8°C	0.05mm	85%	0.05cm	-5.6°C	0.13mm	0.06kPa	11m/s
14:00	-7.2°C	0.04mm	88%	0.04cm	-5.6°C	0.13mm	0.05kPa	11m/s
15:00	-7°C	0.03mm	89%	0.03cm	-5.5°C	0.06mm	0.05kPa	11m/s
16:00	-6.9°C	0.03mm	90%	0.03cm	-5.6°C	0.06mm	0.04kPa	11m/s
17:00 ☾	-7°C	0.03mm	92%	0.03cm	-6°C	0.13mm	0.03kPa	11m/s
18:00 ☾	-7.1°C	0.02mm	93%	0.02cm	-6.1°C	0.13mm	0.03kPa	10m/s
19:00 ☾	-7.2°C	0.02mm	94%	0cm	-6.4°C	0.13mm	0.02kPa	9.9m/s
20:00 ☾	-7.3°C	0.02mm	95%	0.02cm	-6.5°C	0.19mm	0.02kPa	9.3m/s
21:00 ☾	-7.5°C	0.02mm	96%	0.02cm	-7°C	0mm	0.02kPa	8.2m/s
22:00 ☾	-8°C	0.02mm	96%	0.02cm	-7.6°C	0.06mm	0.01kPa	6.4m/s
23:00 ☾	-9°C	0.01mm	98%	0cm	-8.8°C	0.06mm	0.01kPa	3m/s
Tue, Feb 10 Sunrise 08:22 Sunset 16:56
24:00 ☾	-10°C	0.01mm	100%	0cm	-10°C	0.06mm	0kPa	1m/s
01:00 ☾	-11°C	0.01mm	99%	0cm	-11°C	0.06mm	0kPa	0.72m/s
02:00 ☾	-11°C	0mm	99%	0cm	-11°C	0.06mm	0kPa	0.51m/s
03:00 ☾	-9.7°C	0mm	97%	0cm	-9.3°C	0.04mm	0.01kPa	3.1m/s
04:00 ☾	-8.6°C	0mm	94%	0cm	-7.9°C	0.02mm	0.02kPa	5.8m/s
05:00 ☾	-7.5°C	0mm	92%	0cm	-6.5°C	0mm	0.03kPa	8.4m/s
06:00 ☾	-7.2°C	0mm	90%	0cm	-5.8°C	0mm	0.04kPa	8.2m/s
07:00 ☾	-6.8°C	0mm	88%	0cm	-5.2°C	0mm	0.05kPa	8m/s
08:00 ☾	-6.5°C	0mm	86%	0cm	-4.6°C	0mm	0.06kPa	7.8m/s
09:00	-7.1°C	0mm	90%	0cm	-5.7°C	0mm	0.04kPa	5.6m/s
10:00	-7.6°C	0mm	93%	0cm	-6.8°C	0mm	0.02kPa	3.3m/s
11:00	-8.3°C	0mm	97%	0cm	-7.9°C	0mm	0.01kPa	1m/s
12:00	-9°C	0mm	98%	0cm	-8.7°C	0mm	0.01kPa	0.99m/s
13:00	-9.7°C	0mm	98%	0cm	-9.4°C	0mm	0.01kPa	0.95m/s
14:00	-10°C	0mm	98%	0cm	-10°C	0mm	0kPa	0.92m/s
15:00	-11°C	0.003mm	99%	0cm	-11°C	0mm	0kPa	0.8m/s
16:00	-11°C	0.007mm	99%	0cm	-11°C	0mm	0kPa	0.68m/s
17:00 ☾	-12°C	0.01mm	99%	0cm	-12°C	0mm	0kPa	0.56m/s
18:00 ☾	-12°C	0.01mm	99%	0cm	-12°C	0.02mm	0kPa	0.62m/s
19:00 ☾	-12°C	0.01mm	99%	0cm	-12°C	0.04mm	0kPa	0.68m/s
20:00 ☾	-13°C	0.01mm	98%	0cm	-12°C	0.06mm	0kPa	0.74m/s

How to read: these inputs help produce the derived score; they are not requirements by themselves.

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