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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

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 60.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread9.5°C
Visibility24134 (Clear)
Relative Humidity51%
Wind Speed1.6m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

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 86 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 60.0%
Tue, Apr 21
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, Apr 22
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%
Thu, Apr 23
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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20:000%
21:000%
22:000%
23:000%
Fri, Apr 24
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
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19:000%
20:000%
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
Tue, Apr 21 Sunrise 05:40 Sunset 20:53
22:00 ☾
59% -2.1°C 0mm 51% 0cm -7.3° 7.4°C 0mm 0.5kPa 24134m 1.5m/s 1.6m/s
23:00 ☾
58% -2°C 0mm 52% 0cm -12° 7.2°C 0mm 0.48kPa 24134m 1.5m/s 1.6m/s
Wed, Apr 22 Sunrise 05:40 Sunset 20:53
24:00 ☾
58% -1.7°C 0mm 56% 0cm -15° 6.6°C 0mm 0.43kPa 24134m 1.7m/s 1.8m/s
01:00 ☾
63% -0.7°C 0mm 62% 0cm -17° 6°C 0mm 0.35kPa 24134m 1.8m/s 1.9m/s
02:00 ☾
69% 0.4°C 0mm 69% 0cm -16° 5.6°C 0mm 0.28kPa 24135m 2.1m/s 2m/s
03:00 ☾
74% 0.4°C 0mm 71% 0cm -14° 5.3°C 0mm 0.26kPa 24134m 3.7m/s 2.2m/s
04:00 ☾
73% 0°C 0mm 72% 0cm -10° 4.7°C 0mm 0.24kPa 24135m 7.4m/s 2.3m/s
05:00 ☾
72% -0.3°C 0mm 73% 0cm -4.6° 4.1°C 0mm 0.22kPa 24134m 8.8m/s 2.3m/s
06:00
71% -0.5°C 0mm 73% 0cm 2° 3.9°C 0mm 0.22kPa 24135m 9.6m/s 2.5m/s
07:00
52% -0.5°C 0mm 67% 0cm 8.8° 5°C 0mm 0.28kPa 24134m 10m/s 3m/s
08:00
33% 0°C 0mm 62% 0cm 16° 6.7°C 0mm 0.37kPa 24135m 11m/s 3.8m/s
09:00
14% 0.4°C 0mm 62% 0cm 23° 7.2°C 0mm 0.39kPa 24134m 11m/s 4.1m/s
10:00
9% 0.2°C 0mm 59% 0cm 30° 7.6°C 0mm 0.42kPa 24134m 9.8m/s 4.5m/s
11:00
5% -0.5°C 0mm 54% 0cm 35° 8.3°C 0mm 0.5kPa 24134m 8.6m/s 4.8m/s
12:00
0% -1.1°C 0mm 47% 0cm 39° 9.6°C 0mm 0.63kPa 24135m 8.7m/s 5.6m/s
13:00
0% -1.2°C 0mm 44% 0cm 41° 11°C 0mm 0.71kPa 24134m 9.3m/s 5.6m/s
14:00
0% -1°C 0mm 41% 0cm 41° 12°C 0mm 0.81kPa 24134m 10m/s 6m/s
15:00
0% -1.1°C 0mm 40% 0cm 38° 12°C 0mm 0.85kPa 24135m 9.8m/s 6.3m/s
16:00
1% -1°C 0mm 41% 0cm 33° 12°C 0mm 0.83kPa 24135m 11m/s 6.4m/s
17:00
2% -0.1°C 0mm 44% 0cm 27° 12°C 0mm 0.76kPa 24135m 10m/s 5.5m/s
18:00
3% 1.2°C 0mm 53% 0cm 20° 10°C 0.06mm 0.59kPa 24135m 11m/s 6.2m/s
19:00
2% 1°C 0mm 56% 0cm 13° 9.3°C 0.19mm 0.52kPa 22561m 12m/s 5.4m/s
20:00
2% 0.7°C 0mm 61% 0cm 5.7° 7.8°C 0.38mm 0.42kPa 24134m 13m/s 6.3m/s
21:00 ☾
1% -2.2°C 0mm 52% 0cm -0.9° 6.8°C 0.38mm 0.47kPa 24134m 15m/s 7m/s
22:00 ☾
32% -4.1°C 0mm 50% 0cm -7° 5.6°C 0mm 0.46kPa 24134m 18m/s 7.1m/s
23:00 ☾
62% -5.8°C 0.01mm 48% 0cm -12° 4.1°C 0mm 0.42kPa 24134m 14m/s 7.3m/s
Thu, Apr 23 Sunrise 05:37 Sunset 20:56
24:00 ☾
93% -7.9°C 0mm 48% 0cm -15° 2.1°C 0mm 0.37kPa 24135m 12m/s 6.2m/s
01:00 ☾
93% -9.3°C 0mm 46% 0cm -16° 1°C 0mm 0.35kPa 24135m 12m/s 5.8m/s
02:00 ☾
94% -9.2°C 0mm 48% 0cm -16° 0.47°C 0mm 0.33kPa 24135m 12m/s 6m/s
03:00 ☾
94% -8.9°C 0mm 51% 0cm -14° -0.001°C 0mm 0.3kPa 24134m 12m/s 6m/s
04:00 ☾
91% -8.5°C 0mm 54% 0cm -9.6° -0.44°C 0mm 0.27kPa 24135m 12m/s 5.9m/s
05:00 ☾
89% -8.2°C 0mm 57% 0cm -4.2° -0.83°C 0mm 0.25kPa 24135m 12m/s 6m/s
06:00
86% -8.2°C 0mm 59% 0cm 2.3° -1.2°C 0mm 0.23kPa 24135m 12m/s 5.9m/s
07:00
86% -8°C 0mm 59% 0cm 9.1° -1.1°C 0mm 0.23kPa 24135m 12m/s 5.7m/s
08:00
85% -7.6°C 0mm 57% 0cm 16° -0.17°C 0mm 0.26kPa 24135m 12m/s 5.8m/s
09:00
85% -7.6°C 0mm 53% 0cm 23° 1°C 0mm 0.31kPa 24135m 11m/s 6m/s
10:00
74% -8.3°C 0mm 48% 0cm 30° 1.7°C 0mm 0.36kPa 24135m 11m/s 6.5m/s
11:00
64% -8.6°C 0mm 43% 0cm 36° 2.9°C 0mm 0.43kPa 24134m 10m/s 6.2m/s
12:00
53% -8.4°C 0mm 39% 0cm 40° 4.3°C 0mm 0.51kPa 24135m 11m/s 6.4m/s
13:00
48% -7.8°C 0mm 38% 0cm 42° 5.5°C 0mm 0.56kPa 24135m 11m/s 6.4m/s
14:00
42% -7.3°C 0mm 37% 0cm 41° 6.3°C 0mm 0.6kPa 24135m 11m/s 6.5m/s
15:00
37% -7.2°C 0mm 36% 0cm 38° 6.8°C 0mm 0.63kPa 24134m 11m/s 6.6m/s
16:00
31% -6.5°C 0mm 36% 0cm 33° 7.6°C 0mm 0.66kPa 24135m 12m/s 5.9m/s
17:00
25% -5.1°C 0mm 40% 0cm 27° 7.7°C 0mm 0.63kPa 24135m 11m/s 5.2m/s
18:00
19% -4.7°C 0mm 41% 0cm 20° 7.6°C 0mm 0.61kPa 24134m 11m/s 5m/s
19:00
15% -4.1°C 0mm 46% 0cm 13° 6.7°C 0mm 0.53kPa 24135m 10m/s 4.8m/s
20:00
10% -3.9°C 0mm 49% 0cm 6° 5.9°C 0mm 0.47kPa 24134m 9.7m/s 4.7m/s
21:00 ☾
6% -3.5°C 0mm 53% 0cm -0.53° 5.2°C 0mm 0.41kPa 24134m 8.8m/s 4.3m/s
22:00 ☾
9% -3°C 0mm 58% 0cm -6.7° 4.5°C 0mm 0.35kPa 24134m 9.1m/s 3.9m/s
23:00 ☾
11% -2.8°C 0mm 63% 0cm -11° 3.6°C 0mm 0.29kPa 24134m 9.4m/s 3.4m/s
Fri, Apr 24 Sunrise 05:34 Sunset 20:58
24:00 ☾
14% -2.8°C 0mm 66% 0cm -15° 2.9°C 0.06mm 0.25kPa 24134m 9.5m/s 3.1m/s
01:00 ☾
13% -2.7°C 0mm 69% 0cm -16° 2.4°C 0.06mm 0.22kPa 24135m 10m/s 3.2m/s
02:00 ☾
12% -2.7°C 0mm 72% 0cm -16° 1.8°C 0.06mm 0.2kPa 24135m 10m/s 3.3m/s
03:00 ☾
11% -2.7°C 0mm 74% 0cm -13° 1.4°C 0.06mm 0.17kPa 24135m 9.9m/s 3.3m/s
04:00 ☾
19% -2.9°C 0mm 64% 0cm -9.3° 3.3°C 0.04mm 0.28kPa 24135m 8.2m/s 3.3m/s
05:00 ☾
27% -3.5°C 0mm 53% 0cm -3.9° 5.3°C 0.02mm 0.42kPa 24135m 6.4m/s 3.4m/s
06:00
35% -4.7°C 0mm 42% 0cm 2.6° 7.2°C 0mm 0.58kPa 24135m 4.7m/s 3.5m/s
07:00
36% -5°C 0mm 40% 0cm 9.4° 7.8°C 0mm 0.63kPa 24135m 4.5m/s 3.3m/s
08:00
38% -5.2°C 0mm 38% 0cm 17° 8.4°C 0mm 0.69kPa 24135m 4.3m/s 3.1m/s
09:00
39% -5.5°C 0mm 35% 0cm 24° 9°C 0mm 0.74kPa 24135m 4.1m/s 2.9m/s
10:00
47% -5.5°C 0mm 35% 0cm 30° 9.1°C 0mm 0.75kPa 24135m 3.8m/s 2.6m/s
11:00
55% -5.5°C 0mm 35% 0cm 36° 9.2°C 0mm 0.76kPa 24135m 3.5m/s 2.3m/s
12:00
63% -5.5°C 0mm 35% 0cm 40° 9.3°C 0mm 0.76kPa 24135m 3.2m/s 2m/s
13:00
58% -5.1°C 0mm 39% 0cm 42° 7.9°C 0mm 0.65kPa 24135m 2.5m/s 1.7m/s
14:00
54% -4.9°C 0mm 44% 0cm 41° 6.5°C 0mm 0.54kPa 24135m 1.7m/s 1.4m/s
15:00
49% -4.8°C 0mm 48% 0cm 38° 5.2°C 0mm 0.45kPa 24135m 1m/s 1.1m/s
16:00
40% -4.8°C 0mm 50% 0cm 34° 4.7°C 0mm 0.42kPa 24135m 1.5m/s 1.4m/s
17:00
32% -4.8°C 0mm 52% 0cm 27° 4.2°C 0mm 0.4kPa 24135m 1.9m/s 1.6m/s
18:00
23% -4.8°C 0mm 54% 0cm 21° 3.7°C 0mm 0.37kPa 24135m 2.3m/s 1.8m/s
19:00
21% -4.3°C 0mm 57% 0cm 13° 3.5°C 0mm 0.34kPa 24135m 2.2m/s 1.8m/s
20:00
18% -3.8°C 0mm 59% 0cm 6.2° 3.3°C 0mm 0.31kPa 24135m 2.1m/s 1.7m/s
21:00
16% -3.3°C 0mm 62% 0cm -0.08° 3.1°C 0mm 0.29kPa 24135m 2m/s 1.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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