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Rule Fog Hunter

Vesijärvi - Fog Hunter - Southern Finland

Lahti, Päijänne Tavastia, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.1°C
Visibility24134 (Clear)
Relative Humidity92%
Wind Speed3.4m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Moderate Fog at Sunset
Vesijärvi
Today · 17:00–18:00 · 1h window
Medium confidence
49%
🌫️Fog Probability63.9%
Dewpoint Spread: 0.7°C
Visibility: 24135 (Clear)
Relative Humidity: 95%
Wind Speed: 2.9m/s (calm conditions)
fog weather icon
Dense Fog
Vesijärvi
Today · 19:00–24:00
🌫️Fog Probability:69.4-100%
High
fog weather icon
Dense Fog
Vesijärvi
Tomorrow · 02:00–06:00
🌫️Fog Probability:70.8-100%
Medium
fog weather icon
Moderate Fog at Sunrise
Vesijärvi
Tomorrow · 06:00–08:00
🌫️Fog Probability:69.4%
Low
fog weather icon
Moderate Fog
Vesijärvi
Tomorrow · 08:00–09:00
🌫️Fog Probability:69.4%
Medium
fog weather icon
Moderate Fog at Dawn
Vesijärvi
Sun, Mar 15 · 05:00–06:00
🌫️Fog Probability:63.9%
Low
fog weather icon
Dense Fog at Dawn
Vesijärvi
Tue, Mar 17 · 05:00–06:00
🌫️Fog Probability:87.5%
Medium
+5 more windows in the next 10 days

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
13matching hours in the next 92 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 60.0%
Tue, Mar 10
06:00-
07:00-
08:00-
09:00-
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:0051%
17:0054%
18:0051%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, Mar 11
24:000%
01:000%
02:000%
03:000%
04:000%
05:0051%
06:0051%
07:0051%
08:0051%
09:000%
10:000%
11:000%
12:000%
13:000%
14:0048%
15:0050%
16:0057%
17:0064%
18:0057%
19:0073%
20:00100%
21:00100%
22:00100%
23:0069%
Thu, Mar 12
24:0040%
01:0040%
02:0071%
03:00100%
04:0080%
05:00100%
06:0069%
07:0069%
08:0069%
09:0035%
10:0031%
11:0031%
12:0025%
13:0028%
14:0022%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Fri, Mar 13
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%
Sat, Mar 14
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/Helsinki
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Wed, Mar 11 Sunrise 06:47 Sunset 18:08
03:00 ☾
-0.9°C 0mm 92% 0cm 0.24°C 0mm 0.05kPa 24134m 13m/s 3.4m/s
04:00 ☾
-1.1°C 0mm 92% 0cm -0.02°C 0mm 0.05kPa 24135m 12m/s 3.3m/s
05:00 ☾
-1.2°C 0mm 93% 0cm -0.28°C 0mm 0.04kPa 24135m 11m/s 3.2m/s
06:00 ☾
-1.3°C 0mm 94% 0cm -0.45°C 0mm 0.04kPa 24135m 11m/s 3.1m/s
07:00
-1.3°C 0mm 94% 0cm -0.47°C 0mm 0.03kPa 24134m 11m/s 3.3m/s
08:00
-0.7°C 0mm 93% 0cm 0.23°C 0mm 0.04kPa 24134m 12m/s 3.5m/s
09:00
0.3°C 0mm 91% 0cm 1.6°C 0mm 0.06kPa 24135m 11m/s 3.4m/s
10:00
1.5°C 0mm 90% 0cm 2.9°C 0mm 0.07kPa 24135m 12m/s 3.4m/s
11:00
2.4°C 0mm 89% 0cm 4°C 0mm 0.09kPa 24135m 9.8m/s 3.5m/s
12:00
3.2°C 0mm 89% 0cm 4.9°C 0mm 0.1kPa 24135m 8.1m/s 3.6m/s
13:00
3.8°C 0mm 90% 0cm 5.2°C 0mm 0.09kPa 24135m 7.7m/s 3.1m/s
14:00
3.6°C 0mm 96% 0cm 4.3°C 0mm 0.04kPa 24135m 8m/s 2.5m/s
15:00
3.7°C 0mm 98% 0cm 4°C 0mm 0.02kPa 24135m 8.8m/s 2.5m/s
16:00
4°C 0mm 98% 0cm 4.3°C 0mm 0.02kPa 24135m 8.2m/s 2.7m/s
17:00
3.2°C 0mm 95% 0cm 3.9°C 0mm 0.04kPa 24135m 6.6m/s 2.9m/s
18:00
2.6°C 0.03mm 97% 0cm 3.1°C 0mm 0.02kPa 24135m 8.3m/s 2.5m/s
19:00 ☾
2.5°C 0mm 98% 0cm 2.8°C 0mm 0.01kPa 7299m 8.9m/s 2.6m/s
20:00 ☾
2.1°C 0mm 98% 0cm 2.4°C 0mm 0.01kPa 243m 8m/s 2.7m/s
21:00 ☾
1.8°C 0mm 98% 0cm 2°C 0mm 0.01kPa 103m 9.3m/s 3m/s
22:00 ☾
1.8°C 0mm 99% 0cm 2°C 0mm 0.01kPa 122m 11m/s 3m/s
23:00 ☾
2.2°C 0.16mm 98% 0cm 2.6°C 0.06mm 0.02kPa 692m 15m/s 4m/s
Thu, Mar 12 Sunrise 06:47 Sunset 18:08
24:00 ☾
2.4°C 0mm 97% 0cm 2.8°C 0.19mm 0.02kPa 20808m 14m/s 4.3m/s
01:00 ☾
2.6°C 0mm 97% 0cm 3°C 0.19mm 0.02kPa 15271m 13m/s 4.1m/s
02:00 ☾
2.7°C 0mm 98% 0cm 3°C 0.19mm 0.02kPa 7603m 11m/s 3.7m/s
03:00 ☾
2.4°C 0mm 98% 0cm 2.7°C 0mm 0.01kPa 549m 11m/s 3.4m/s
04:00 ☾
2.3°C 0mm 97% 0cm 2.7°C 0mm 0.02kPa 3944m 11m/s 3.7m/s
05:00 ☾
2.2°C 0mm 98% 0cm 2.5°C 0mm 0.01kPa 121m 12m/s 3.6m/s
06:00 ☾
2.4°C 0mm 98% 0cm 2.7°C 0mm 0.02kPa 115m 13m/s 4m/s
07:00
2.7°C 0mm 98% 0cm 3°C 0mm 0.02kPa 180m 14m/s 4.1m/s
08:00
2.8°C 0.02mm 98% 0cm 3.1°C 0mm 0.02kPa 195m 14m/s 4.2m/s
09:00
3.1°C 0.61mm 98% 0cm 3.4°C 0.19mm 0.02kPa 367m 15m/s 4.4m/s
10:00
3.2°C 0.12mm 97% 0cm 3.6°C 0.5mm 0.02kPa 906m 15m/s 4.8m/s
11:00
3.3°C 0.02mm 97% 0cm 3.7°C 0.5mm 0.02kPa 846m 14m/s 4.6m/s
12:00
3.7°C 0mm 98% 0cm 4.1°C 0.56mm 0.02kPa 1140m 14m/s 4.5m/s
13:00
3.7°C 0mm 98% 0cm 4.1°C 0.56mm 0.02kPa 882m 12m/s 4.5m/s
14:00
3.3°C 0mm 97% 0cm 3.8°C 0.56mm 0.03kPa 6892m 12m/s 4.3m/s
15:00
1.8°C 0.01mm 87% 0cm 3.7°C 0mm 0.1kPa 24134m 11m/s 4.9m/s
16:00
1.1°C 0mm 85% 0cm 3.5°C 0mm 0.12kPa 24135m 11m/s 4.9m/s
17:00
0.8°C 0mm 84% 0cm 3.3°C 0mm 0.13kPa 24134m 12m/s 4.1m/s
18:00
0.5°C 0mm 87% 0cm 2.4°C 0mm 0.09kPa 24135m 12m/s 4.3m/s
19:00 ☾
0.5°C 0mm 90% 0cm 2.1°C 0mm 0.07kPa 24135m 13m/s 4.3m/s
20:00 ☾
0°C 0mm 91% 0cm 1.3°C 0mm 0.06kPa 24134m 14m/s 4.2m/s
21:00 ☾
-0.6°C 0mm 90% 0cm 0.85°C 0mm 0.07kPa 24134m 15m/s 4.5m/s
22:00 ☾
-0.7°C 0mm 89% 0cm 0.87°C 0mm 0.07kPa 24134m 16m/s 4.8m/s
23:00 ☾
-0.4°C 0mm 90% 0cm 1.1°C 0mm 0.07kPa 24134m 16m/s 5m/s
Fri, Mar 13 Sunrise 06:44 Sunset 18:10
24:00 ☾
-0.2°C 0mm 90% 0cm 1.2°C 0mm 0.07kPa 24134m 17m/s 5.1m/s
01:00 ☾
0°C 0mm 92% 0cm 1.2°C 0mm 0.06kPa 24134m 16m/s 5.1m/s
02:00 ☾
-0.1°C 0mm 92% 0cm 1.1°C 0mm 0.06kPa 24135m 17m/s 5.3m/s
03:00 ☾
-0.5°C 0mm 91% 0cm 0.87°C 0mm 0.06kPa 24134m 18m/s 5.5m/s
04:00 ☾
-0.7°C 0mm 88% 0cm 1.1°C 0mm 0.08kPa 24134m 18m/s 5.8m/s
05:00 ☾
-0.4°C 0mm 85% 0cm 1.8°C 0mm 0.1kPa 24134m 18m/s 6m/s
06:00 ☾
0°C 0mm 86% 0cm 2.1°C 0mm 0.1kPa 24134m 19m/s 6.4m/s
07:00
-0.1°C 0mm 84% 0cm 2.4°C 0mm 0.12kPa 24135m 19m/s 6.6m/s
08:00
0.1°C 0mm 82% 0cm 2.8°C 0mm 0.13kPa 24135m 18m/s 6.7m/s
09:00
0.5°C 0mm 80% 0cm 3.7°C 0mm 0.16kPa 24135m 18m/s 6.9m/s
10:00
0.9°C 0mm 77% 0cm 4.5°C 0mm 0.19kPa 24135m 18m/s 7.1m/s
11:00
1.2°C 0mm 75% 0cm 5.4°C 0mm 0.23kPa 24135m 18m/s 7.3m/s
12:00
1.2°C 0mm 75% 0cm 5.3°C 0mm 0.22kPa 24135m 19m/s 7.3m/s
13:00
1.2°C 0mm 75% 0cm 5.2°C 0mm 0.22kPa 24135m 19m/s 7.2m/s
14:00
1.2°C 0mm 76% 0cm 5.1°C 0mm 0.22kPa 24135m 19m/s 7.2m/s
15:00
1.2°C 0mm 76% 0cm 5.1°C 0mm 0.21kPa 24135m 19m/s 7m/s
16:00
1.3°C 0mm 76% 0cm 5.1°C 0mm 0.21kPa 24135m 19m/s 6.8m/s
17:00
1.4°C 0mm 77% 0cm 5.1°C 0mm 0.2kPa 24135m 18m/s 6.6m/s
18:00
2.1°C 0mm 81% 0cm 5.1°C 0mm 0.17kPa 24135m 18m/s 6.4m/s
19:00 ☾
2.8°C 0mm 85% 0cm 5.1°C 0mm 0.13kPa 24135m 18m/s 6.2m/s
20:00 ☾
3.5°C 0mm 89% 0cm 5.1°C 0mm 0.1kPa 24135m 17m/s 6m/s
21:00 ☾
3.9°C 0mm 90% 0cm 5.4°C 0mm 0.09kPa 24135m 17m/s 6m/s
22:00 ☾
4.3°C 0mm 91% 0cm 5.6°C 0mm 0.08kPa 24135m 16m/s 6m/s
23:00 ☾
4.7°C 0mm 93% 0cm 5.8°C 0mm 0.07kPa 24135m 16m/s 6m/s
Sat, Mar 14 Sunrise 06:41 Sunset 18:13
24:00 ☾
4.5°C 0mm 93% 0cm 5.6°C 0mm 0.07kPa 24135m 16m/s 5.7m/s
01:00 ☾
4.3°C 0mm 92% 0cm 5.4°C 0mm 0.07kPa 24135m 16m/s 5.5m/s
02:00 ☾
4.1°C 0mm 92% 0cm 5.2°C 0mm 0.07kPa 24135m 15m/s 5.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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