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Rule Fog Hunter

Haarlem - Fog Hunter - The Netherlands

Haarlem, North Holland, The Netherlands

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 Spread7.5°C
Visibility24135 (Clear)
Relative Humidity60%
Wind Speed4.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Amsterdam

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

The Netherlands' unique below-sea-level geography creates exceptional fog conditions as the polder landscape—land reclaimed from the sea—traps cold, moist air in natural depressions. This creates persistent valley fog and radiation fog that transforms windmills and waterways into ethereal scenes.

Kinderdijk's 19 UNESCO windmills rising from morning mist create one of photography's most iconic Dutch scenes. The flat terrain and extensive water networks mean fog forms readily on calm, clear nights and can persist well into morning. Marken's historic harbor on the Markermeer lake experiences frequent sea fog rolling in from the IJsselmeer.

What makes Dutch fog photography exceptional:

  • Windmill emergence - Historic structures appearing gradually as fog lifts from polder basins
  • Canal diffusion - Amsterdam and Leiden's canals create soft, atmospheric street scenes in fog
  • Flat persistence - Lack of topography means fog lingers longer than in hilly regions
  • Autumn reliability - October-November offer most consistent radiation fog conditions

Best fog occurs on calm, clear nights following daytime warmth—typically spring and autumn. Arrive before sunrise to catch densest conditions. The polders around Kinderdijk, Zaanse Schans windmills north of Amsterdam, and the Alblasserwaard region are prime locations. Fog typically burns off by 10-11 AM as temperatures rise.

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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/Amsterdam
Fog Probability
≥ 60.0%
Wed, Apr 8
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
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21:000%
22:000%
23:000%
Thu, Apr 9
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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16:000%
17:000%
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Fri, Apr 10
24:000%
01:000%
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06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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Sat, Apr 11
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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Sun, Apr 12
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
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/Amsterdam
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, Apr 9 Sunrise 06:58 Sunset 20:29
10:00
2% 6.2°C 0mm 60% 0cm 26° 14°C 0mm 0.62kPa 24135m 5.6m/s 4m/s
11:00
1% 6.7°C 0mm 55% 0cm 34° 16°C 0mm 0.79kPa 24134m 5.5m/s 4m/s
12:00
1% 7.1°C 0mm 51% 0cm 41° 17°C 0mm 0.96kPa 22384m 5.2m/s 3.7m/s
13:00
1% 7.9°C 0mm 50% 0cm 44° 19°C 0.06mm 1.1kPa 24134m 5.2m/s 3.8m/s
14:00
1% 8.6°C 0mm 50% 0cm 45° 19°C 0.06mm 1.1kPa 24134m 5.4m/s 4m/s
15:00
2% 9.6°C 0mm 53% 0cm 43° 19°C 0mm 1.1kPa 17092m 5.7m/s 4.4m/s
16:00
2% 9.7°C 0mm 58% 0cm 37° 18°C 0mm 0.89kPa 17014m 6.3m/s 4.6m/s
17:00
3% 9.9°C 0mm 66% 0cm 30° 16°C 0.13mm 0.62kPa 17570m 7.7m/s 5m/s
18:00
2% 11°C 0mm 74% 0cm 22° 15°C 0.25mm 0.46kPa 13508m 8.3m/s 4.8m/s
19:00
1% 11°C 0mm 80% 0cm 13° 14°C 0.38mm 0.32kPa 15677m 7.4m/s 4m/s
20:00
0% 11°C 0mm 88% 0cm 3.8° 13°C 0.63mm 0.18kPa 11699m 7.8m/s 3.8m/s
21:00 ☾
0% 11°C 0.34mm 91% 0cm -5.2° 12°C 0.31mm 0.13kPa 11155m 9.2m/s 4m/s
22:00 ☾
0% 11°C 0.03mm 94% 0cm -13° 11°C 0.56mm 0.08kPa 24135m 11m/s 5.7m/s
23:00 ☾
0% 7.1°C 0mm 87% 0cm -20° 9.2°C 0.63mm 0.15kPa 24134m 14m/s 9.9m/s
Fri, Apr 10 Sunrise 06:58 Sunset 20:29
24:00 ☾
0% 6.5°C 0.05mm 88% 0cm -26° 8.3°C 0.69mm 0.13kPa 24134m 13m/s 7.2m/s
01:00 ☾
0% 6.1°C 0mm 87% 0cm -29° 8.1°C 0.69mm 0.14kPa 24135m 12m/s 7.4m/s
02:00 ☾
0% 5.6°C 0mm 86% 0cm -30° 7.8°C 0.69mm 0.14kPa 24134m 13m/s 7.2m/s
03:00 ☾
21% 4.9°C 0mm 85% 0cm -28° 7.3°C 0mm 0.15kPa 24135m 12m/s 7.6m/s
04:00 ☾
42% 4.1°C 0mm 81% 0cm -23° 7°C 0mm 0.19kPa 24135m 11m/s 6.6m/s
05:00 ☾
63% 3.6°C 0mm 79% 0cm -17° 6.9°C 0mm 0.21kPa 24135m 11m/s 7.6m/s
06:00 ☾
55% 2.9°C 0mm 77% 0cm -8.8° 6.7°C 0mm 0.22kPa 24134m 11m/s 7m/s
07:00
48% 2.8°C 0mm 79% 0cm 0.35° 6.3°C 0mm 0.2kPa 24135m 9.8m/s 6.2m/s
08:00
40% 3.3°C 0mm 80% 0cm 9° 6.6°C 0mm 0.2kPa 24135m 9.4m/s 6m/s
09:00
27% 3.4°C 0mm 76% 0cm 18° 7.3°C 0mm 0.24kPa 24134m 7.8m/s 5.4m/s
10:00
14% 2.8°C 0mm 71% 0cm 27° 7.8°C 0mm 0.31kPa 24134m 5.1m/s 4.2m/s
11:00
1% 2.6°C 0mm 68% 0cm 35° 8.3°C 0mm 0.35kPa 24135m 4.8m/s 4.2m/s
12:00
1% 2.5°C 0mm 65% 0cm 41° 8.8°C 0mm 0.4kPa 24135m 3.6m/s 3.5m/s
13:00
0% 2.5°C 0mm 63% 0cm 45° 9.1°C 0.06mm 0.43kPa 24135m 3.1m/s 3.6m/s
14:00
0% 2.4°C 0mm 62% 0cm 46° 9.3°C 0.06mm 0.45kPa 24135m 2.7m/s 3.7m/s
15:00
13% 2.5°C 0mm 61% 0cm 43° 9.6°C 0mm 0.46kPa 24135m 3.1m/s 4.3m/s
16:00
26% 2.2°C 0mm 61% 0cm 38° 9.4°C 0mm 0.46kPa 24134m 2.5m/s 3.6m/s
17:00
39% 2.1°C 0mm 61% 0cm 30° 9.3°C 0mm 0.46kPa 24135m 2.4m/s 3.3m/s
18:00
34% 2°C 0mm 62% 0cm 22° 9°C 0mm 0.44kPa 24134m 1.9m/s 2.8m/s
19:00
28% 2°C 0mm 64% 0cm 13° 8.4°C 0mm 0.39kPa 24135m 1.3m/s 2.2m/s
20:00
23% 2.5°C 0mm 72% 0cm 4° 7.2°C 0mm 0.29kPa 24134m 2m/s 1.8m/s
21:00 ☾
16% 2.4°C 0mm 76% 0cm -5° 6.3°C 0mm 0.23kPa 24135m 2.8m/s 2.1m/s
22:00 ☾
8% 2.7°C 0mm 80% 0cm -13° 6°C 0mm 0.19kPa 24135m 4.5m/s 2.8m/s
23:00 ☾
1% 2.9°C 0mm 80% 0cm -20° 6°C 0mm 0.19kPa 24134m 6.1m/s 3.1m/s
Sat, Apr 11 Sunrise 06:55 Sunset 20:30
24:00 ☾
1% 2.7°C 0mm 78% 0cm -26° 6.1°C 0mm 0.2kPa 24135m 8.1m/s 3.5m/s
01:00 ☾
0% 2.6°C 0mm 76% 0cm -29° 6.5°C 0mm 0.23kPa 24135m 7.9m/s 3.6m/s
02:00 ☾
0% 2.5°C 0mm 73% 0cm -29° 7°C 0mm 0.27kPa 24134m 9m/s 3.9m/s
03:00 ☾
3% 2.2°C 0mm 72% 0cm -27° 6.8°C 0mm 0.27kPa 24135m 10m/s 4.1m/s
04:00 ☾
5% 1.7°C 0mm 74% 0cm -23° 6°C 0mm 0.24kPa 24134m 11m/s 4.3m/s
05:00 ☾
8% 1.4°C 0mm 72% 0cm -16° 6°C 0mm 0.26kPa 24135m 12m/s 5m/s
06:00 ☾
6% 1.1°C 0mm 69% 0cm -8.4° 6.4°C 0mm 0.3kPa 24134m 12m/s 4.7m/s
07:00
3% 1°C 0mm 68% 0cm 0.63° 6.4°C 0mm 0.31kPa 24135m 11m/s 4.6m/s
08:00
1% 1.5°C 0mm 67% 0cm 9.3° 7.2°C 0mm 0.33kPa 24135m 12m/s 5.3m/s
09:00
1% 2.2°C 0mm 65% 0cm 18° 8.5°C 0mm 0.39kPa 24134m 13m/s 5.6m/s
10:00
0% 2.9°C 0mm 61% 0cm 27° 10°C 0mm 0.49kPa 24134m 14m/s 6.5m/s
11:00
0% 3.3°C 0mm 55% 0cm 35° 12°C 0mm 0.64kPa 24134m 13m/s 6.9m/s
12:00
0% 3.7°C 0mm 54% 0cm 41° 13°C 0mm 0.69kPa 24135m 14m/s 6.9m/s
13:00
0% 3.9°C 0mm 47% 0cm 45° 15°C 0mm 0.91kPa 24135m 13m/s 7.9m/s
14:00
0% 5.5°C 0mm 49% 0cm 46° 16°C 0mm 0.96kPa 24134m 13m/s 7.9m/s
15:00
0% 5.7°C 0mm 58% 0cm 43° 14°C 0.19mm 0.67kPa 24134m 11m/s 7.1m/s
16:00
0% 5.4°C 0mm 67% 0cm 38° 11°C 0.38mm 0.44kPa 24135m 9.9m/s 6.2m/s
17:00
0% 4.8°C 0mm 76% 0cm 31° 8.7°C 0.56mm 0.27kPa 24135m 8.4m/s 5.3m/s
18:00
0% 4.4°C 0mm 75% 0cm 22° 8.7°C 0.56mm 0.29kPa 24135m 8.9m/s 6.2m/s
19:00
0% 4°C 0mm 73% 0cm 13° 8.6°C 0.56mm 0.3kPa 24135m 9.3m/s 7m/s
20:00
0% 3.7°C 0mm 71% 0cm 4.3° 8.6°C 0.56mm 0.32kPa 24135m 9.7m/s 7.8m/s
21:00 ☾
5% 3.8°C 0mm 73% 0cm -4.7° 8.5°C 0.38mm 0.3kPa 24135m 9.7m/s 8.1m/s
22:00 ☾
11% 4°C 0mm 74% 0cm -13° 8.3°C 0.19mm 0.28kPa 24135m 9.7m/s 8.3m/s
23:00 ☾
16% 4.2°C 0mm 76% 0cm -20° 8.2°C 0mm 0.26kPa 24135m 9.7m/s 8.6m/s
Sun, Apr 12 Sunrise 06:53 Sunset 20:32
24:00 ☾
16% 3.8°C 0mm 75% 0cm -25° 8°C 0mm 0.27kPa 24135m 10m/s 8.7m/s
01:00 ☾
17% 3.4°C 0mm 74% 0cm -28° 7.8°C 0mm 0.28kPa 24135m 11m/s 8.8m/s
02:00 ☾
17% 3°C 0mm 72% 0cm -29° 7.6°C 0mm 0.29kPa 24135m 11m/s 8.9m/s
03:00 ☾
24% 3.3°C 0mm 74% 0cm -27° 7.7°C 0mm 0.27kPa 24135m 11m/s 9.1m/s
04:00 ☾
30% 3.7°C 0mm 76% 0cm -22° 7.7°C 0mm 0.26kPa 24135m 11m/s 9.2m/s
05:00 ☾
37% 4°C 0mm 77% 0cm -16° 7.7°C 0mm 0.24kPa 24135m 11m/s 9.3m/s
06:00 ☾
34% 4.5°C 0mm 79% 0cm -8.1° 7.9°C 0mm 0.22kPa 24135m 12m/s 9.4m/s
07:00
30% 5°C 0mm 80% 0cm 0.92° 8.1°C 0mm 0.21kPa 24135m 12m/s 9.5m/s
08:00
27% 5.4°C 0mm 82% 0cm 9.7° 8.3°C 0mm 0.2kPa 24135m 13m/s 9.6m/s
09:00
27% 5.5°C 0mm 81% 0cm 19° 8.6°C 0mm 0.22kPa 24135m 13m/s 9.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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