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Rule Fog Hunter

Repovesi - Fog Hunter - Southern Finland

Repovesi Nationalpark, Kymenlaakso, 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 · ≥ 75.0%

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 Spread1.0°C
Visibility24135 (Clear)
Relative Humidity94%
Wind Speed3.3m/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 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 75.0%
Tue, May 12
23:000%
Wed, May 13
24:000%
01:000%
02:000%
03:000%
04:0048%
05:0064%
06:0062%
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, May 14
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%
Fri, May 15
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, May 16
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%
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
Thu, May 14 Sunrise 04:29 Sunset 21:50
05:00
0% 6.4°C 0.01mm 94% 0cm 2.3° 7.4°C 0.06mm 0.07kPa 24135m 8.7m/s 3.3m/s
06:00
0% 6.1°C 0mm 91% 0cm 8.4° 7.4°C 0.06mm 0.09kPa 24135m 7.9m/s 3.4m/s
07:00
0% 6.1°C 0mm 89% 0cm 15° 7.8°C 0.13mm 0.11kPa 24135m 7.7m/s 3.4m/s
08:00
0% 5.6°C 0mm 84% 0cm 22° 8.2°C 0.13mm 0.18kPa 24135m 7.2m/s 4m/s
09:00
0% 5.1°C 0mm 78% 0cm 30° 8.6°C 0.13mm 0.24kPa 24134m 7.2m/s 4.3m/s
10:00
5% 4.9°C 0mm 74% 0cm 36° 9.3°C 0mm 0.3kPa 24135m 6.5m/s 4.2m/s
11:00
10% 4.3°C 0mm 69% 0cm 42° 9.7°C 0mm 0.37kPa 24134m 6.5m/s 4.2m/s
12:00
15% 3.7°C 0mm 62% 0cm 46° 11°C 0mm 0.49kPa 24135m 6.6m/s 4.4m/s
13:00
25% 2.8°C 0mm 53% 0cm 47° 12°C 0mm 0.66kPa 24134m 6.7m/s 4.4m/s
14:00
34% 2.2°C 0mm 46% 0cm 47° 14°C 0mm 0.84kPa 24134m 6.6m/s 4.4m/s
15:00
44% 1.8°C 0mm 43% 0cm 43° 14°C 0mm 0.91kPa 24134m 6.6m/s 4.6m/s
16:00
61% 1.3°C 0mm 41% 0cm 38° 14°C 0mm 0.97kPa 24134m 5.9m/s 4.1m/s
17:00
77% 0.9°C 0mm 39% 0cm 32° 15°C 0mm 1kPa 24135m 5m/s 3.6m/s
18:00
94% 0.9°C 0mm 40% 0cm 25° 14°C 0mm 0.98kPa 24135m 4.1m/s 3.3m/s
19:00
93% 1.1°C 0mm 42% 0cm 17° 14°C 0mm 0.91kPa 24134m 3.8m/s 3.3m/s
20:00
92% 2.5°C 0mm 50% 0cm 11° 13°C 0mm 0.73kPa 24134m 4.7m/s 2.7m/s
21:00
91% 3.2°C 0mm 62% 0cm 4.2° 10°C 0mm 0.48kPa 24135m 3.7m/s 2.1m/s
22:00 ☾
85% 2.7°C 0mm 68% 0cm -1.4° 8.2°C 0mm 0.34kPa 24135m 2.1m/s 2.1m/s
23:00 ☾
80% 2.5°C 0mm 72% 0cm -5.9° 7.3°C 0mm 0.29kPa 24135m 2.6m/s 2.1m/s
Fri, May 15 Sunrise 04:29 Sunset 21:50
24:00 ☾
74% 2.6°C 0mm 74% 0cm -8.8° 7°C 0mm 0.26kPa 24134m 4.6m/s 2.4m/s
01:00 ☾
63% 2.5°C 0mm 76% 0cm -10° 6.6°C 0mm 0.24kPa 24134m 6.4m/s 2.4m/s
02:00 ☾
53% 2.5°C 0mm 77% 0cm -9.3° 6.3°C 0mm 0.22kPa 24135m 6.8m/s 2.4m/s
03:00 ☾
42% 2.5°C 0mm 77% 0cm -6.9° 6.2°C 0mm 0.22kPa 24135m 6.6m/s 2.2m/s
04:00 ☾
35% 2.5°C 0mm 77% 0cm -2.9° 6.2°C 0mm 0.21kPa 24135m 7.8m/s 2.3m/s
05:00
29% 2.7°C 0mm 79% 0cm 2.5° 6.1°C 0mm 0.2kPa 24135m 8.3m/s 2.4m/s
06:00
22% 3.2°C 0mm 74% 0cm 8.6° 7.5°C 0mm 0.27kPa 24135m 8.9m/s 2.5m/s
07:00
20% 3.9°C 0mm 69% 0cm 15° 9.4°C 0mm 0.37kPa 24134m 8m/s 2.5m/s
08:00
17% 4.5°C 0mm 62% 0cm 23° 11°C 0mm 0.51kPa 24135m 6.7m/s 3m/s
09:00
15% 4.9°C 0mm 57% 0cm 30° 13°C 0mm 0.64kPa 24134m 5.2m/s 2.7m/s
10:00
12% 5.1°C 0mm 53% 0cm 36° 15°C 0mm 0.77kPa 24135m 4.1m/s 2.5m/s
11:00
9% 5.1°C 0mm 49% 0cm 42° 16°C 0mm 0.91kPa 24134m 3.2m/s 2.1m/s
12:00
6% 4.8°C 0mm 44% 0cm 46° 17°C 0mm 1.1kPa 24135m 2.6m/s 1.8m/s
13:00
6% 4.3°C 0mm 39% 0cm 48° 19°C 0mm 1.3kPa 24134m 2m/s 1.5m/s
14:00
6% 4.1°C 0mm 36% 0cm 47° 20°C 0mm 1.5kPa 24135m 1.4m/s 0.8m/s
15:00
6% 3.7°C 0mm 34% 0cm 43° 20°C 0mm 1.5kPa 24135m 1.4m/s 0.34m/s
16:00
6% 3.3°C 0mm 34% 0cm 38° 19°C 0mm 1.5kPa 24135m 1.2m/s 0.71m/s
17:00
7% 3.1°C 0mm 34% 0cm 32° 19°C 0mm 1.4kPa 24134m 1.4m/s 1.9m/s
18:00
7% 3.5°C 0mm 37% 0cm 25° 19°C 0mm 1.4kPa 24134m 2.4m/s 3.2m/s
19:00
7% 4.1°C 0mm 42% 0cm 18° 17°C 0mm 1.1kPa 24134m 4.1m/s 3.1m/s
20:00
7% 4.3°C 0mm 46% 0cm 11° 16°C 0mm 0.96kPa 24135m 4m/s 1.9m/s
21:00
7% 4.2°C 0mm 53% 0cm 4.4° 14°C 0mm 0.74kPa 24134m 1.8m/s 1.8m/s
22:00 ☾
11% 3.5°C 0mm 56% 0cm -1.1° 12°C 0mm 0.61kPa 24134m 1.5m/s 1.5m/s
23:00 ☾
15% 2.7°C 0mm 57% 0cm -5.7° 11°C 0mm 0.56kPa 24134m 1.2m/s 1.1m/s
Sat, May 16 Sunrise 04:26 Sunset 21:53
24:00 ☾
19% 2.3°C 0mm 57% 0cm -8.6° 10°C 0mm 0.53kPa 24134m 1.1m/s 1.1m/s
01:00 ☾
19% 2.4°C 0mm 58% 0cm -9.7° 10°C 0mm 0.53kPa 24134m 1.4m/s 1.5m/s
02:00 ☾
18% 2.5°C 0mm 58% 0cm -9.1° 11°C 0mm 0.54kPa 24134m 1.9m/s 1.8m/s
03:00 ☾
18% 2.3°C 0mm 58% 0cm -6.7° 10°C 0mm 0.53kPa 24134m 3.6m/s 2.1m/s
04:00 ☾
18% 4.2°C 0mm 57% 0cm -2.7° 12°C 0mm 0.62kPa 24134m 3m/s 1.8m/s
05:00
17% 6°C 0mm 57% 0cm 2.7° 15°C 0mm 0.71kPa 24135m 2.4m/s 1.6m/s
06:00
17% 7.9°C 0mm 56% 0cm 8.8° 17°C 0mm 0.82kPa 24135m 1.8m/s 1.3m/s
07:00
18% 8.5°C 0mm 59% 0cm 16° 17°C 0mm 0.78kPa 24135m 1.7m/s 1.3m/s
08:00
18% 9.1°C 0mm 61% 0cm 23° 17°C 0mm 0.73kPa 24135m 1.6m/s 1.4m/s
09:00
19% 9.6°C 0mm 64% 0cm 30° 17°C 0mm 0.69kPa 24135m 1.5m/s 1.4m/s
10:00
18% 9.7°C 0mm 65% 0cm 37° 16°C 0.02mm 0.64kPa 24135m 1.5m/s 1.3m/s
11:00
16% 9.7°C 0mm 67% 0cm 42° 16°C 0.04mm 0.6kPa 24135m 1.4m/s 1.1m/s
12:00
15% 9.7°C 0mm 68% 0cm 46° 15°C 0.06mm 0.56kPa 24135m 1.3m/s 0.99m/s
13:00
16% 8.6°C 0mm 66% 0cm 48° 15°C 0.06mm 0.57kPa 24135m 2.3m/s 1.4m/s
14:00
16% 7.6°C 0mm 65% 0cm 47° 14°C 0.06mm 0.57kPa 24135m 3.4m/s 1.8m/s
15:00
17% 6.5°C 0mm 63% 0cm 44° 13°C 0.06mm 0.57kPa 24135m 4.4m/s 2.2m/s
16:00
17% 5.5°C 0mm 60% 0cm 38° 13°C 0.04mm 0.59kPa 24135m 3.7m/s 2m/s
17:00
18% 4.5°C 0mm 58% 0cm 32° 13°C 0.02mm 0.61kPa 24135m 2.9m/s 1.9m/s
18:00
18% 3.4°C 0mm 56% 0cm 25° 12°C 0mm 0.62kPa 24135m 2.2m/s 1.7m/s
19:00
17% 3.2°C 0mm 57% 0cm 18° 11°C 0mm 0.59kPa 24135m 2.1m/s 1.7m/s
20:00
16% 3°C 0mm 58% 0cm 11° 11°C 0mm 0.55kPa 24135m 2.1m/s 1.7m/s
21:00
15% 2.7°C 0mm 59% 0cm 4.6° 10°C 0mm 0.52kPa 24135m 2m/s 1.8m/s
22:00 ☾
21% 3°C 0mm 61% 0cm -0.87° 10°C 0mm 0.49kPa 24135m 2.4m/s 1.7m/s
23:00 ☾
28% 3.3°C 0mm 63% 0cm -5.4° 10°C 0mm 0.46kPa 24135m 2.7m/s 1.7m/s
Sun, May 17 Sunrise 04:24 Sunset 21:55
24:00 ☾
34% 3.6°C 0mm 64% 0cm -8.3° 10°C 0mm 0.44kPa 24135m 3.1m/s 1.7m/s
01:00 ☾
33% 5.3°C 0mm 62% 0cm -9.5° 12°C 0mm 0.54kPa 24135m 3.6m/s 2.2m/s
02:00 ☾
33% 6.8°C 0mm 60% 0cm -8.9° 14°C 0mm 0.65kPa 24135m 4.2m/s 2.6m/s
03:00 ☾
32% 8.4°C 0mm 58% 0cm -6.5° 17°C 0mm 0.79kPa 24135m 4.7m/s 3.1m/s
04:00 ☾
31% 8.4°C 0mm 54% 0cm -2.4° 18°C 0mm 0.95kPa 24135m 4.8m/s 3.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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