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Rule Fog Hunter

Kurjenrahka - Fog Hunter - Southern Finland

Turku, Southwest Finland, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.7°C
Visibility24134 (Clear)
Relative Humidity88%
Wind Speed3.5m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Dense Fog (lingering, sunbreaks)
Kurjenrahka
Tue, Mar 10 · 13:00–17:00 · 4h window
Medium confidence
57%
🌫️Fog Probability86.7-100%
Dewpoint Spread: 0.1°C
Visibility: 300 (Fog)
Relative Humidity: 99%
Wind Speed: 1.3m/s (calm conditions)
fog weather icon
Dense Fog (lingering) at Sunset
Kurjenrahka
Tue, Mar 10 · 17:00–19:00
🌫️Fog Probability:100%
High
fog weather icon
Dense Fog (lingering) at Dusk
Kurjenrahka
Tue, Mar 10 · 19:00–20:00
🌫️Fog Probability:100%
Medium
fog weather icon
Dense Fog (lingering)
Kurjenrahka
Tue, Mar 10 · 20:00–06:00
🌫️Fog Probability:100%
High
fog weather icon
Dense Fog (lingering) at Sunrise
Kurjenrahka
Wed, Mar 11 · 06:00–08:00
🌫️Fog Probability:100%
Medium
fog weather icon
Dense Fog (lingering)
Kurjenrahka
Wed, Mar 11 · 08:00–09:00
🌫️Fog Probability:100%
Medium
fog weather icon
Dense Fog (lingering)
Kurjenrahka
Fri, Mar 13 · 08:00–09:00
🌫️Fog Probability:100%
Medium
+1 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
0matching hours in the next 92 hours
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
Wed, Mar 4
06:000%2.5°C24134m4.6m/s
07:000%3.1°C24134m4.9m/s
08:000%3°C24134m5.8m/s
09:000%3.4°C24135m5.7m/s
10:000%3.9°C24135m7.2m/s
11:000%4.5°C24134m7.7m/s
12:000%4.8°C24135m8.9m/s
13:000%4.4°C24134m8.8m/s
14:000%4.1°C24134m8.1m/s
15:000%4.1°C24134m8.2m/s
16:000%3.9°C24134m8.1m/s
17:000%3.8°C24135m8.1m/s
18:000%3.6°C24135m8m/s
19:000%3.4°C24135m8m/s
20:000%3.2°C24135m8m/s
21:000%2.8°C24135m7.1m/s
22:000%2.6°C24134m6.6m/s
23:000%2.4°C24134m6.3m/s
Thu, Mar 5
24:000%2.3°C24135m5.9m/s
01:000%2.2°C24135m5.2m/s
02:000%2.2°C24134m4.6m/s
03:000%2°C24135m3.9m/s
04:000%1.7°C24134m3.5m/s
05:000%1.4°C24134m3.3m/s
06:000%1.2°C24134m3.1m/s
07:000%1°C24135m3.2m/s
08:0051%0.8°C24134m3.2m/s
09:0051%1°C24135m3.2m/s
10:0045%1°C24135m2.8m/s
11:000%1.1°C24134m2.6m/s
12:000%1.4°C24134m2.8m/s
13:000%1.7°C24134m2.6m/s
14:000%1.6°C24135m2.5m/s
15:000%1.5°C24134m2.6m/s
16:000%1.2°C24134m2.4m/s
17:0064%0.6°C24134m1.5m/s
18:0067%0.4°C24135m1.4m/s
19:0067%0.4°C24135m1m/s
20:0067%0.4°C24135m0.8m/s
21:0067%0.4°C24134m0.47m/s
22:0067%0.4°C24134m0.37m/s
23:0067%0.5°C24134m1.2m/s
Fri, Mar 6
24:0067%0.4°C24134m1.4m/s
01:0067%0.4°C24135m1.1m/s
02:0067%0.5°C24134m1.2m/s
03:0064%0.5°C24135m1.3m/s
04:0064%0.7°C24135m1.5m/s
05:0060%0.7°C24134m1.5m/s
06:0060%1°C24134m1.8m/s
07:000%1.2°C24134m2.1m/s
08:000%1.2°C24135m2.3m/s
09:000%1.8°C24134m2.9m/s
10:000%2°C24135m3.3m/s
11:000%2.1°C24134m3.5m/s
12:000%2.3°C24134m3.8m/s
13:000%2.3°C24135m3.9m/s
14:000%2.1°C24134m3.8m/s
15:000%1.8°C24134m3.3m/s
16:000%1.5°C24135m3.1m/s
17:000%1.3°C24134m3.2m/s
18:0051%0.9°C24134m3.1m/s
19:0051%0.9°C24134m3.2m/s
20:0051%0.9°C24135m3.7m/s
21:0054%0.7°C24135m3.7m/s
22:0051%0.8°C24134m3.2m/s
23:0051%0.9°C24134m2.7m/s
Sat, Mar 7
24:0051%0.8°C24134m2.6m/s
01:0054%0.7°C24135m2.4m/s
02:0054%0.5°C24135m2.4m/s
03:0057%0.5°C24135m2.4m/s
04:0054%0.6°C24135m2.3m/s
05:0051%0.8°C24134m2.5m/s
06:0051%0.8°C24135m2.7m/s
07:000%1°C24134m2.6m/s
08:000%1.2°C24135m2.7m/s
09:000%1.4°C24135m2.2m/s
10:000%1.7°C24135m1.6m/s
11:000%2°C24135m1.1m/s
12:000%1.6°C24135m1m/s
13:000%1.3°C24135m0.85m/s
14:0053%1°C24135m0.71m/s
15:0053%0.9°C24135m0.91m/s
16:0060%0.9°C24135m1.1m/s
17:0060%0.8°C24135m1.3m/s
18:000%1°C24135m1.2m/s
19:000%1.1°C24135m1.1m/s
20:000%1.4°C24135m1m/s
21:000%1.5°C24135m1.2m/s
22:000%1.7°C24135m1.4m/s
23:000%1.9°C24135m1.6m/s
Sun, Mar 8
24:000%2°C24135m1.7m/s
01:000%2.1°C24135m1.9m/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
Thu, Mar 5 Sunrise 07:18 Sunset 18:07
04:00 ☾
-1.8°C 0mm 88% 0cm -0.06°C 0mm 0.07kPa 11m/s
05:00 ☾
-2.1°C 0mm 90% 0cm -0.69°C 0mm 0.06kPa 9.9m/s
06:00 ☾
-2.3°C 0mm 92% 0cm -1.1°C 0mm 0.05kPa 9.5m/s
07:00 ☾
-2.1°C 0mm 93% 0cm -1.1°C 0mm 0.04kPa 10m/s
08:00
-1.3°C 0mm 94% 0cm -0.47°C 0mm 0.04kPa 11m/s
09:00
-0.2°C 0mm 93% 0cm 0.79°C 0mm 0.04kPa 10m/s
10:00
0.8°C 0mm 93% 0cm 1.8°C 0mm 0.05kPa 9.2m/s
11:00
1.5°C 0mm 93% 0cm 2.6°C 0mm 0.05kPa 7.7m/s
12:00
2°C 0mm 91% 0cm 3.4°C 0mm 0.07kPa 7m/s
13:00
2.3°C 0mm 89% 0cm 4°C 0mm 0.09kPa 6.2m/s
14:00
2.7°C 0mm 89% 0cm 4.3°C 0mm 0.09kPa 6.8m/s
15:00
2.7°C 0mm 90% 0cm 4.2°C 0mm 0.08kPa 7m/s
16:00
2°C 0mm 92% 0cm 3.2°C 0mm 0.06kPa 5.9m/s
17:00
1°C 0mm 96% 0cm 1.6°C 0mm 0.03kPa 2.8m/s
18:00
-0.4°C 0mm 97% 0cm 0.01°C 0mm 0.02kPa 1.3m/s
19:00 ☾
-1.5°C 0mm 97% 0cm -1.1°C 0mm 0.02kPa 1m/s
20:00 ☾
-2°C 0mm 97% 0cm -1.6°C 0mm 0.02kPa 0.91m/s
21:00 ☾
-2.1°C 0mm 97% 0cm -1.7°C 0mm 0.02kPa 0.41m/s
22:00 ☾
-2.4°C 0mm 97% 0cm -2°C 0mm 0.02kPa 0.31m/s
23:00 ☾
-2.7°C 0mm 97% 0cm -2.2°C 0mm 0.02kPa 1.2m/s
Fri, Mar 6 Sunrise 07:18 Sunset 18:07
24:00 ☾
-3.2°C 0mm 97% 0cm -2.8°C 0mm 0.01kPa 1.3m/s
01:00 ☾
-3.6°C 0mm 97% 0cm -3.2°C 0mm 0.01kPa 1m/s
02:00 ☾
-3.8°C 0mm 97% 0cm -3.3°C 0mm 0.02kPa 1.1m/s
03:00 ☾
-3.8°C 0mm 96% 0cm -3.3°C 0mm 0.02kPa 1.2m/s
04:00 ☾
-3.8°C 0mm 96% 0cm -3.1°C 0mm 0.02kPa 1.4m/s
05:00 ☾
-3.8°C 0mm 95% 0cm -3.1°C 0mm 0.03kPa 2.7m/s
06:00 ☾
-3.8°C 0mm 93% 0cm -2.8°C 0mm 0.03kPa 3.5m/s
07:00 ☾
-3.7°C 0mm 92% 0cm -2.5°C 0mm 0.04kPa 6m/s
08:00
-3°C 0mm 92% 0cm -1.8°C 0mm 0.05kPa 7.6m/s
09:00
-1.6°C 0mm 88% 0cm 0.15°C 0mm 0.07kPa 10m/s
10:00
-0.6°C 0mm 87% 0cm 1.4°C 0mm 0.09kPa 9.9m/s
11:00
-0.1°C 0mm 86% 0cm 2°C 0mm 0.1kPa 10m/s
12:00
0°C 0mm 85% 0cm 2.3°C 0mm 0.11kPa 9.1m/s
13:00
0.1°C 0mm 85% 0cm 2.4°C 0mm 0.11kPa 9.6m/s
14:00
0.2°C 0mm 86% 0cm 2.3°C 0mm 0.1kPa 9.6m/s
15:00
0.3°C 0mm 88% 0cm 2.1°C 0mm 0.09kPa 9.2m/s
16:00
0.2°C 0mm 90% 0cm 1.7°C 0mm 0.07kPa 9m/s
17:00
-0.2°C 0mm 91% 0cm 1.1°C 0mm 0.06kPa 9.3m/s
18:00
-0.8°C 0mm 93% 0cm 0.13°C 0mm 0.04kPa 9.7m/s
19:00 ☾
-0.9°C 0mm 94% 0cm 0.004°C 0mm 0.04kPa 12m/s
20:00 ☾
-0.2°C 0mm 94% 0cm 0.75°C 0mm 0.04kPa 13m/s
21:00 ☾
0°C 0mm 95% 0cm 0.73°C 0mm 0.03kPa 11m/s
22:00 ☾
-0.7°C 0mm 95% 0cm 0.06°C 0mm 0.03kPa 11m/s
23:00 ☾
-1.5°C 0mm 94% 0cm -0.56°C 0mm 0.04kPa 9.2m/s
Sat, Mar 7 Sunrise 07:15 Sunset 18:09
24:00 ☾
-1.8°C 0mm 94% 0cm -0.96°C 0mm 0.04kPa 8.6m/s
01:00 ☾
-2.1°C 0mm 95% 0cm -1.4°C 0mm 0.03kPa 7.9m/s
02:00 ☾
-2.4°C 0mm 96% 0cm -1.9°C 0mm 0.02kPa 7.7m/s
03:00 ☾
-2.3°C 0mm 97% 0cm -1.8°C 0mm 0.02kPa 8.2m/s
04:00 ☾
-1.7°C 0mm 96% 0cm -1.1°C 0mm 0.02kPa 7.4m/s
05:00 ☾
-1.4°C 0mm 94% 0cm -0.59°C 0mm 0.04kPa 8.4m/s
06:00 ☾
-1.3°C 0mm 94% 0cm -0.49°C 0mm 0.03kPa 10m/s
07:00 ☾
-0.9°C 0mm 93% 0cm 0.14°C 0mm 0.05kPa 10m/s
08:00
-0.8°C 0mm 92% 0cm 0.41°C 0mm 0.05kPa 10m/s
09:00
-0.6°C 0mm 90% 0cm 0.83°C 0mm 0.06kPa 7.1m/s
10:00
-0.5°C 0mm 88% 0cm 1.2°C 0mm 0.08kPa 4.1m/s
11:00
-0.3°C 0mm 87% 0cm 1.7°C 0mm 0.09kPa 1.1m/s
12:00
-1°C 0mm 89% 0cm 0.57°C 0mm 0.07kPa 1m/s
13:00
-1.8°C 0mm 91% 0cm -0.52°C 0mm 0.05kPa 0.85m/s
14:00
-2.6°C 0mm 93% 0cm -1.6°C 0mm 0.04kPa 0.7m/s
15:00
-2.7°C 0mm 93% 0cm -1.8°C 0mm 0.04kPa 0.87m/s
16:00
-2.8°C 0mm 94% 0cm -1.9°C 0mm 0.03kPa 1m/s
17:00
-2.9°C 0mm 94% 0cm -2.1°C 0mm 0.03kPa 1.2m/s
18:00
-3.1°C 0mm 93% 0cm -2.1°C 0mm 0.04kPa 1.1m/s
19:00 ☾
-3.2°C 0mm 92% 0cm -2.1°C 0mm 0.04kPa 1.1m/s
20:00 ☾
-3.4°C 0mm 91% 0cm -2°C 0mm 0.05kPa 1m/s
21:00 ☾
-3.6°C 0mm 89% 0cm -2.1°C 0mm 0.06kPa 2.8m/s
22:00 ☾
-3.8°C 0mm 88% 0cm -2.1°C 0mm 0.06kPa 4.7m/s
23:00 ☾
-4°C 0mm 86% 0cm -2.1°C 0mm 0.07kPa 6.5m/s
Sun, Mar 8 Sunrise 07:12 Sunset 18:12
24:00 ☾
-4.1°C 0mm 86% 0cm -2.1°C 0mm 0.07kPa 7m/s
01:00 ☾
-4.2°C 0mm 85% 0cm -2.1°C 0mm 0.08kPa 7.6m/s
02:00 ☾
-4.3°C 0mm 84% 0cm -2°C 0mm 0.08kPa 8.1m/s
03:00 ☾
-3.9°C 0mm 80% 0cm -0.92°C 0mm 0.11kPa 8.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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