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Rule Fog Hunter

Beppu - Fog Hunter - Kyushu

Beppu, Oita, Japan

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread10.4°C
Visibility24134 (Clear)
Relative Humidity48%
Wind Speed1.5m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
fog weather icon
Next opportunity
Moderate Fog at Sunset
Beppu
Sun, Apr 26 · 18:00–20:00 · 2h window
Low confidence
17%
🌫️Fog Probability62.7%
Dewpoint Spread: 0.5°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 1.3m/s (calm conditions)
fog weather icon
Dense Fog
Beppu
Thu, Apr 30 · 24:00–01:00
🌫️Fog Probability:100%
Medium
fog weather icon
Moderate Fog
Beppu
Thu, Apr 30 · 03:00–04:00
🌫️Fog Probability:61.4%
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts when Kyushu's volcanic steam, subtropical humidity, and mountainous terrain create atmospheric photography conditions. We track temperature inversions, humidity patterns, and geothermal activity to identify when mist transforms calderas, forests, and onsen villages.

Kyushu's subtropical climate and active volcanism create fog conditions unlike anywhere else in Japan. Mount Aso's massive caldera traps morning mist around its active crater, while Yakushima's ancient cedars remain wrapped in perpetual cloud. Yufuin's onsen village sees lake mist rising from thermal springs beneath Mount Yufu's twin peaks.

What makes Kyushu fog photography special:

  • Volcanic steam mixing with natural fog - Mount Aso's active crater sends white plumes into morning mist creating otherworldly layers
  • Subtropical forest clouds - Yakushima's 3,000-year-old cedars emerge from moss-draped mist receiving 250+ inches annual rainfall
  • Onsen village atmospherics - Thermal springs in Yufuin and Beppu create steam rising from streets and ponds blending with natural fog
  • Crater lake mysteries - Kirishima's volcanic lakes develop morning fog banks isolated between peaks

Lake Kinrinko in Yufuin produces spectacular morning mist November through March when cold air meets thermal waters—arrive before dawn for steam rising across mirror-calm surface with Mount Yufu reflected. Mount Aso's caldera rim offers views into fog-filled volcanic bowls with Nakadake crater's steam plume above. Yakushima's forest trails become mystical when fog drifts through moss-covered ancient trees. Best conditions occur on clear cold winter mornings, though Yakushima's fog is reliably year-round.

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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
Asia/Tokyo
Fog Probability
≥ 60.0%
Tue, Apr 21
04:0053%
05:0034%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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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%
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Thu, Apr 23
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
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16:0033%
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21:000%
22:0039%
23:0039%
Fri, Apr 24
24:0039%
01:0039%
02:0046%
03:0057%
04:0057%
05:0057%
06:000%
07:000%
08:000%
09:000%
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21:000%
22:000%
23:000%
Sat, Apr 25
24:000%
01:000%
02:000%
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
Asia/Tokyo
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
Wed, Apr 22 Sunrise 05:37 Sunset 18:48
04:00 ☾
2% -0.9°C 0mm 48% 0cm -19° 9.5°C 0mm 0.62kPa 24134m 1.3m/s 1.5m/s
05:00 ☾
4% -0.9°C 0mm 49% 0cm -8° 9.2°C 0mm 0.59kPa 24134m 1.3m/s 1.5m/s
06:00 ☾
6% 0°C 0mm 52% 0cm 4.2° 9.3°C 0mm 0.55kPa 24134m 1.4m/s 1.5m/s
07:00 ☾
4% 3.1°C 0mm 56% 0cm 16° 11°C 0mm 0.59kPa 24134m 1m/s 0.96m/s
08:00 ☾
2% 3.4°C 0mm 50% 0cm 29° 14°C 0mm 0.79kPa 24135m 0.7m/s 0.32m/s
09:00
0% 3.7°C 0mm 47% 0cm 41° 15°C 0mm 0.88kPa 24134m 1m/s 1.2m/s
10:00
0% 3.8°C 0mm 43% 0cm 53° 16°C 0mm 1.1kPa 24135m 1.7m/s 1.5m/s
11:00
0% 4.1°C 0mm 41% 0cm 63° 17°C 0mm 1.2kPa 24134m 2.1m/s 1.9m/s
12:00
0% 5.1°C 0mm 41% 0cm 69° 19°C 0mm 1.3kPa 24135m 2.4m/s 2m/s
13:00
0% 6.6°C 0mm 56% 0cm 66° 15°C 0mm 0.76kPa 24134m 1.7m/s 1.3m/s
14:00
0% 6.8°C 0mm 55% 0cm 58° 16°C 0mm 0.81kPa 24135m 1.2m/s 1m/s
15:00
0% 8.5°C 0.05mm 66% 0cm 46° 15°C 0.06mm 0.56kPa 24134m 2.3m/s 1.5m/s
16:00
0% 9.5°C 0.64mm 80% 0cm 34° 13°C 0.38mm 0.3kPa 18517m 2.8m/s 1.9m/s
17:00
0% 9.9°C 0.38mm 91% 0cm 22° 11°C 1.1mm 0.12kPa 21314m 2.5m/s 1.7m/s
18:00
0% 10°C 0.16mm 94% 0cm 9.4° 11°C 1.3mm 0.08kPa 24135m 2.6m/s 1.7m/s
19:00 ☾
0% 10°C 1.1mm 96% 0cm -2.8° 11°C 2.1mm 0.05kPa 10074m 1.3m/s 0.66m/s
20:00 ☾
0% 11°C 1.4mm 98% 0cm -15° 11°C 3.6mm 0.02kPa 2411m 1.4m/s 0.98m/s
21:00 ☾
0% 11°C 1.8mm 99% 0cm -25° 11°C 5.4mm 0.01kPa 939m 2.2m/s 1.3m/s
22:00 ☾
0% 10°C 1.7mm 99% 0cm -35° 11°C 1.7mm 0.01kPa 455m 2.2m/s 1.4m/s
23:00 ☾
0% 10°C 1.4mm 99% 0cm -41° 10°C 3.4mm 0.01kPa 372m 3.1m/s 1.7m/s
Thu, Apr 23 Sunrise 05:36 Sunset 18:49
24:00 ☾
0% 11°C 2mm 99% 0cm -44° 11°C 5.1mm 0.01kPa 386m 3m/s 1.6m/s
01:00 ☾
0% 11°C 1.7mm 99% 0cm -43° 11°C 7.1mm 0.01kPa 648m 4.5m/s 1.9m/s
02:00 ☾
0% 11°C 1.9mm 99% 0cm -38° 11°C 9.3mm 0.01kPa 732m 4.5m/s 1.9m/s
03:00 ☾
0% 11°C 1.6mm 99% 0cm -29° 11°C 11mm 0.01kPa 2594m 2.8m/s 1.4m/s
04:00 ☾
0% 11°C 4.2mm 99% 0cm -19° 11°C 2.6mm 0.01kPa 915m 2.9m/s 1.5m/s
05:00 ☾
0% 10°C 4.1mm 99% 0cm -7.8° 10°C 6.8mm 0.01kPa 328m 3m/s 1.6m/s
06:00 ☾
0% 10°C 4mm 99% 0cm 4.4° 10°C 11mm 0.01kPa 297m 2.9m/s 1.7m/s
07:00 ☾
0% 10°C 5.7mm 100% 0cm 17° 10°C 16mm 0.01kPa 274m 2.8m/s 1m/s
08:00 ☾
0% 11°C 4mm 99% 0cm 29° 11°C 21mm 0.01kPa 271m 4.4m/s 2m/s
09:00
0% 10°C 5.4mm 99% 0cm 42° 10°C 25mm 0.02kPa 321m 4m/s 1.7m/s
10:00
0% 10°C 3.1mm 99% 0cm 53° 10°C 3.9mm 0.01kPa 497m 5.1m/s 2m/s
11:00
0% 9.6°C 1.1mm 98% 0cm 63° 9.9°C 5.7mm 0.02kPa 755m 6.2m/s 2.2m/s
12:00
0% 9.2°C 2.6mm 98% 0cm 69° 9.6°C 7.5mm 0.03kPa 4070m 6.5m/s 2m/s
13:00
0% 9°C 2mm 97% 0cm 67° 9.4°C 9.9mm 0.03kPa 6500m 7m/s 2.4m/s
14:00
0% 8.7°C 2.5mm 97% 0cm 58° 9.1°C 12mm 0.03kPa 4608m 5.5m/s 2m/s
15:00
0% 8.4°C 1.4mm 97% 0cm 47° 8.9°C 14mm 0.04kPa 8039m 6.2m/s 2.2m/s
16:00
0% 8.3°C 0.4mm 97% 0cm 34° 8.8°C 0.94mm 0.04kPa 20092m 6.9m/s 2m/s
17:00
0% 8.5°C 1.3mm 97% 0cm 22° 8.9°C 1.9mm 0.03kPa 9753m 5.8m/s 1.9m/s
18:00
0% 8.6°C 0.17mm 97% 0cm 9.5° 9.1°C 2.4mm 0.04kPa 23605m 4.6m/s 2.1m/s
19:00 ☾
0% 8.7°C 0.12mm 96% 0cm -2.7° 9.3°C 2.6mm 0.04kPa 24035m 4.3m/s 1.7m/s
20:00 ☾
0% 8.9°C 0.02mm 96% 0cm -14° 9.4°C 2.6mm 0.04kPa 24135m 4.6m/s 2m/s
21:00 ☾
0% 9.1°C 0mm 96% 0cm -25° 9.7°C 2.6mm 0.05kPa 24134m 5.1m/s 2.1m/s
22:00 ☾
0% 9.2°C 0mm 95% 0cm -34° 10°C 0mm 0.06kPa 24135m 3.7m/s 2.1m/s
23:00 ☾
0% 9.2°C 0mm 95% 0cm -41° 10°C 0mm 0.06kPa 24135m 3.6m/s 2.2m/s
Fri, Apr 24 Sunrise 05:35 Sunset 18:50
24:00 ☾
0% 9.3°C 0mm 95% 0cm -44° 10°C 0mm 0.07kPa 24134m 3.2m/s 2.2m/s
01:00 ☾
0% 9.1°C 0mm 94% 0cm -43° 9.9°C 0mm 0.07kPa 24135m 2.6m/s 2m/s
02:00 ☾
0% 8.7°C 0mm 95% 0cm -37° 9.5°C 0mm 0.06kPa 24134m 3m/s 2.2m/s
03:00 ☾
0% 8.5°C 0mm 96% 0cm -29° 9.2°C 0mm 0.05kPa 24134m 2.4m/s 2.1m/s
04:00 ☾
4% 8.4°C 0mm 96% 0cm -19° 9°C 0mm 0.05kPa 24134m 2.2m/s 2m/s
05:00 ☾
9% 7.9°C 0mm 95% 0cm -7.5° 8.6°C 0mm 0.05kPa 24134m 2.1m/s 2.1m/s
06:00 ☾
13% 7.6°C 0mm 93% 0cm 4.6° 8.7°C 0mm 0.08kPa 24134m 2.2m/s 2.3m/s
07:00 ☾
13% 9.1°C 0mm 89% 0cm 17° 11°C 0mm 0.14kPa 24135m 2.3m/s 1.7m/s
08:00 ☾
13% 8.6°C 0mm 76% 0cm 29° 13°C 0mm 0.35kPa 24135m 5.4m/s 2m/s
09:00
13% 7.1°C 0mm 64% 0cm 42° 14°C 0mm 0.56kPa 24135m 6m/s 2.7m/s
10:00
21% 7.3°C 0mm 65% 0cm 54° 14°C 0mm 0.55kPa 24135m 5.5m/s 2.5m/s
11:00
30% 7.4°C 0mm 66% 0cm 64° 14°C 0mm 0.54kPa 24135m 5m/s 2.2m/s
12:00
38% 7.6°C 0mm 66% 0cm 69° 14°C 0mm 0.53kPa 24135m 4.5m/s 2m/s
13:00
40% 7°C 0mm 69% 0cm 67° 13°C 0mm 0.45kPa 24135m 3.6m/s 2m/s
14:00
42% 6.3°C 0mm 72% 0cm 58° 11°C 0mm 0.38kPa 24135m 2.7m/s 1.9m/s
15:00
44% 5.7°C 0mm 74% 0cm 47° 10°C 0mm 0.31kPa 24135m 1.7m/s 1.9m/s
16:00
48% 5.8°C 0mm 74% 0cm 35° 10°C 0mm 0.32kPa 24135m 1.9m/s 2m/s
17:00
53% 5.9°C 0mm 75% 0cm 22° 10°C 0mm 0.32kPa 24135m 2.2m/s 2.1m/s
18:00
57% 6°C 0mm 75% 0cm 9.6° 10°C 0mm 0.32kPa 24135m 2.4m/s 2.3m/s
19:00 ☾
57% 6.4°C 0mm 78% 0cm -2.5° 10°C 0mm 0.27kPa 24135m 2.3m/s 2.2m/s
20:00 ☾
58% 6.8°C 0mm 81% 0cm -14° 9.9°C 0mm 0.23kPa 24135m 2.2m/s 2.1m/s
21:00 ☾
58% 7.1°C 0mm 84% 0cm -25° 9.7°C 0mm 0.19kPa 24135m 2.1m/s 2.1m/s
22:00 ☾
60% 7.6°C 0mm 85% 0cm -34° 10°C 0mm 0.18kPa 24135m 2.4m/s 2m/s
23:00 ☾
63% 8.1°C 0mm 86% 0cm -41° 10°C 0mm 0.18kPa 24135m 2.7m/s 1.9m/s
Sat, Apr 25 Sunrise 05:34 Sunset 18:50
24:00 ☾
65% 8.6°C 0mm 87% 0cm -44° 11°C 0mm 0.17kPa 24135m 2.9m/s 1.9m/s
01:00 ☾
60% 8.8°C 0mm 81% 0cm -42° 12°C 0mm 0.27kPa 24135m 4.1m/s 2.5m/s
02:00 ☾
56% 8.9°C 0mm 74% 0cm -37° 13°C 0mm 0.39kPa 24135m 5.4m/s 3m/s
03:00 ☾
51% 8.9°C 0mm 68% 0cm -29° 15°C 0mm 0.53kPa 24135m 6.6m/s 3.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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