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Rule Fog Hunter

Yufuin - Fog Hunter - Kyushu

Yufu, Oita, Japan

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread3.4°C
Visibility24135 (Clear)
Relative Humidity79%
Wind Speed2.2m/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
Yufuin
Tue, Apr 14 · 18:00–19:00 · 1h window
Low confidence
28%
🌫️Fog Probability62.7%
Dewpoint Spread: 0.5°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 1.2m/s (calm conditions)
fog weather icon
Moderate Fog at Dusk
Yufuin
Tue, Apr 14 · 19:00–20:00
🌫️Fog Probability:62.7%
Low
fog weather icon
Moderate Fog
Yufuin
Tue, Apr 14 · 20:00–22:00
🌫️Fog Probability:62.7%
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%
Sat, Apr 4
22:000%
23:000%
Sun, Apr 5
24:000%
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Mon, Apr 6
24:000%
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Tue, Apr 7
24:000%
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Wed, Apr 8
24:000%
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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
Sun, Apr 5 Sunrise 05:56 Sunset 18:37
22:00 ☾
92% 6.7°C 0mm 79% 0cm -39° 10°C 0mm 0.26kPa 24135m 1.8m/s 2.2m/s
23:00 ☾
96% 5.7°C 0mm 77% 0cm -47° 9.5°C 0mm 0.27kPa 24135m 2m/s 2.3m/s
Mon, Apr 6 Sunrise 05:56 Sunset 18:37
24:00 ☾
100% 4.8°C 0mm 75% 0cm -50° 9°C 0mm 0.29kPa 24134m 1.9m/s 2.2m/s
01:00 ☾
100% 3.5°C 0mm 70% 0cm -49° 8.7°C 0mm 0.34kPa 24135m 2m/s 2.2m/s
02:00 ☾
99% 2°C 0mm 63% 0cm -44° 8.7°C 0mm 0.42kPa 24134m 1.9m/s 2.2m/s
03:00 ☾
99% 0.7°C 0mm 57% 0cm -35° 8.7°C 0mm 0.48kPa 24135m 1.8m/s 2.2m/s
04:00 ☾
67% 0.1°C 0mm 55% 0cm -24° 8.7°C 0mm 0.51kPa 24135m 1.6m/s 2m/s
05:00 ☾
36% 0.5°C 0mm 56% 0cm -12° 8.8°C 0mm 0.49kPa 24134m 1.5m/s 1.8m/s
06:00 ☾
4% 1.9°C 0mm 61% 0cm 0.41° 9°C 0mm 0.45kPa 24134m 1.4m/s 1.6m/s
07:00 ☾
3% 5.1°C 0mm 67% 0cm 13° 11°C 0mm 0.43kPa 24135m 0.92m/s 0.83m/s
08:00 ☾
1% 6.3°C 0mm 61% 0cm 25° 14°C 0mm 0.61kPa 24135m 0.9m/s 0.78m/s
09:00 ☾
0% 7.3°C 0mm 57% 0cm 37° 16°C 0mm 0.77kPa 24134m 1.7m/s 1.4m/s
10:00 ☾
0% 8.6°C 0mm 54% 0cm 48° 18°C 0mm 0.95kPa 24135m 1.8m/s 1.4m/s
11:00 ☾
0% 9.2°C 0mm 49% 0cm 58° 20°C 0mm 1.2kPa 24134m 3.3m/s 1.3m/s
12:00 ☾
0% 9.3°C 0mm 48% 0cm 63° 21°C 0mm 1.3kPa 24134m 2.5m/s 2m/s
13:00 ☾
0% 9.1°C 0mm 49% 0cm 61° 20°C 0mm 1.2kPa 24134m 2.1m/s 1.7m/s
14:00 ☾
0% 9.3°C 0mm 50% 0cm 54° 20°C 0mm 1.2kPa 24134m 2.5m/s 1.9m/s
15:00 ☾
0% 9.5°C 0mm 53% 0cm 44° 19°C 0mm 1kPa 24135m 1.5m/s 1.9m/s
16:00 ☾
0% 10°C 0mm 59% 0cm 32° 18°C 0mm 0.85kPa 24135m 1.5m/s 1.7m/s
17:00 ☾
0% 11°C 0mm 72% 0cm 20° 16°C 0mm 0.51kPa 24134m 1.6m/s 1.3m/s
18:00 ☾
0% 11°C 0mm 78% 0cm 7.2° 15°C 0mm 0.37kPa 24134m 0.61m/s 0.36m/s
19:00 ☾
0% 11°C 0mm 77% 0cm -5.3° 14°C 0mm 0.38kPa 24135m 1m/s 0.92m/s
20:00 ☾
0% 9.9°C 0mm 73% 0cm -17° 15°C 0mm 0.44kPa 24134m 1.3m/s 1.4m/s
21:00 ☾
0% 9.5°C 0mm 70% 0cm -29° 15°C 0mm 0.51kPa 24135m 1.6m/s 1.7m/s
22:00 ☾
0% 9.4°C 0mm 71% 0cm -39° 15°C 0mm 0.49kPa 24135m 1.8m/s 1.9m/s
23:00 ☾
0% 9.1°C 0mm 69% 0cm -46° 15°C 0mm 0.52kPa 24135m 1.6m/s 1.8m/s
Tue, Apr 7 Sunrise 05:55 Sunset 18:37
24:00 ☾
0% 9.1°C 0.2mm 71% 0cm -50° 14°C 0.06mm 0.48kPa 22803m 2m/s 2.3m/s
01:00 ☾
0% 9.8°C 0.08mm 78% 0cm -49° 14°C 0.19mm 0.35kPa 24134m 1.6m/s 1.7m/s
02:00 ☾
0% 9.7°C 0.24mm 80% 0cm -43° 13°C 0.25mm 0.31kPa 24134m 1.2m/s 1.2m/s
03:00 ☾
0% 10°C 0.96mm 89% 0cm -34° 12°C 0.94mm 0.16kPa 11116m 1.7m/s 1.7m/s
04:00 ☾
0% 11°C 1.1mm 94% 0cm -24° 12°C 1.1mm 0.08kPa 11043m 2.8m/s 1.8m/s
05:00 ☾
0% 11°C 1.9mm 96% 0cm -12° 11°C 2.4mm 0.05kPa 5862m 4.8m/s 2.9m/s
06:00 ☾
0% 9.2°C 1mm 95% 0cm 0.64° 10°C 3.8mm 0.06kPa 12711m 4.8m/s 2.9m/s
07:00 ☾
0% 7.9°C 0.39mm 93% 0cm 13° 9°C 4.4mm 0.08kPa 23611m 5.8m/s 3m/s
08:00 ☾
0% 7.5°C 0.3mm 90% 0cm 25° 9°C 4.6mm 0.11kPa 24134m 5.4m/s 2.8m/s
09:00 ☾
0% 7.1°C 0.42mm 86% 0cm 37° 9.3°C 5.1mm 0.16kPa 19911m 2.8m/s 1.6m/s
10:00 ☾
0% 7.2°C 0mm 78% 0cm 49° 11°C 0.06mm 0.29kPa 24134m 2.6m/s 1.4m/s
11:00 ☾
1% 5.7°C 0mm 58% 0cm 58° 14°C 0.06mm 0.67kPa 24135m 4.2m/s 1.9m/s
12:00 ☾
1% 2°C 0mm 41% 0cm 63° 15°C 0.06mm 1kPa 24134m 6.7m/s 4.1m/s
13:00 ☾
3% 1.7°C 0mm 40% 0cm 62° 15°C 0.06mm 1kPa 24134m 7.7m/s 4.6m/s
14:00 ☾
4% 1.6°C 0mm 39% 0cm 54° 16°C 0.06mm 1.1kPa 24135m 9m/s 5.6m/s
15:00 ☾
6% 2.1°C 0mm 43% 0cm 44° 15°C 0.06mm 0.95kPa 24134m 9.5m/s 6.7m/s
16:00 ☾
34% 2.2°C 0mm 48% 0cm 32° 13°C 0mm 0.79kPa 24135m 9.5m/s 6.1m/s
17:00 ☾
61% 2.1°C 0mm 51% 0cm 20° 12°C 0mm 0.67kPa 24134m 9m/s 4.7m/s
18:00 ☾
89% 1.2°C 0mm 55% 0cm 7.4° 9.8°C 0mm 0.54kPa 24135m 8.1m/s 4m/s
19:00 ☾
92% 0.3°C 0mm 62% 0cm -5.1° 7.1°C 0mm 0.39kPa 24134m 5.2m/s 3m/s
20:00 ☾
94% 0.1°C 0mm 65% 0cm -17° 6.2°C 0mm 0.33kPa 24134m 4.6m/s 2.7m/s
21:00 ☾
97% -0.1°C 0mm 67% 0cm -28° 5.6°C 0mm 0.3kPa 24135m 3.5m/s 2.5m/s
22:00 ☾
98% -0.4°C 0mm 67% 0cm -38° 5.3°C 0mm 0.3kPa 24135m 2.5m/s 2.4m/s
23:00 ☾
99% -0.7°C 0mm 67% 0cm -46° 5°C 0mm 0.29kPa 24135m 1.9m/s 2.2m/s
Wed, Apr 8 Sunrise 05:54 Sunset 18:38
24:00 ☾
100% -0.9°C 0mm 66% 0cm -50° 4.9°C 0mm 0.29kPa 24134m 1.8m/s 2.1m/s
01:00 ☾
99% -1.1°C 0mm 65% 0cm -48° 4.8°C 0mm 0.3kPa 24134m 1.8m/s 2.1m/s
02:00 ☾
99% -1.5°C 0mm 64% 0cm -43° 4.7°C 0mm 0.31kPa 24135m 1.7m/s 2.1m/s
03:00 ☾
98% -1.8°C 0mm 63% 0cm -34° 4.6°C 0mm 0.31kPa 24135m 1.7m/s 2m/s
04:00 ☾
97% -0.8°C 0mm 53% 0cm -23° 8.3°C 0mm 0.52kPa 24135m 1.7m/s 2m/s
05:00 ☾
97% -0.4°C 0mm 42% 0cm -12° 12°C 0mm 0.81kPa 24135m 1.7m/s 1.9m/s
06:00 ☾
96% -1°C 0mm 32% 0cm 0.87° 16°C 0mm 1.2kPa 24135m 1.7m/s 1.9m/s
07:00 ☾
96% -0.1°C 0mm 33% 0cm 13° 16°C 0mm 1.2kPa 24135m 2m/s 2.3m/s
08:00 ☾
96% 0.7°C 0mm 35% 0cm 26° 16°C 0mm 1.2kPa 24135m 2.2m/s 2.7m/s
09:00 ☾
96% 1.5°C 0mm 36% 0cm 38° 17°C 0mm 1.2kPa 24135m 2.4m/s 3.2m/s
10:00 ☾
94% 3.9°C 0mm 48% 0cm 49° 15°C 0mm 0.87kPa 24135m 2.1m/s 2.6m/s
11:00 ☾
92% 5.4°C 0mm 60% 0cm 59° 13°C 0mm 0.59kPa 24135m 1.8m/s 2m/s
12:00 ☾
90% 6.3°C 0mm 72% 0cm 64° 11°C 0mm 0.37kPa 24135m 1.4m/s 1.5m/s
13:00 ☾
89% 5.6°C 0mm 75% 0cm 62° 9.8°C 0mm 0.3kPa 24135m 1.5m/s 1.6m/s
14:00 ☾
89% 4.9°C 0mm 79% 0cm 55° 8.4°C 0mm 0.24kPa 24135m 1.6m/s 1.7m/s
15:00 ☾
88% 4.2°C 0mm 82% 0cm 44° 7.1°C 0mm 0.18kPa 24135m 1.7m/s 1.9m/s
16:00 ☾
81% 3.9°C 0mm 82% 0cm 32° 6.8°C 0mm 0.18kPa 24135m 1.8m/s 1.9m/s
17:00 ☾
73% 3.5°C 0mm 82% 0cm 20° 6.5°C 0mm 0.18kPa 24135m 1.8m/s 1.9m/s
18:00 ☾
66% 3.2°C 0mm 81% 0cm 7.5° 6.2°C 0mm 0.18kPa 24135m 1.8m/s 2m/s
19:00 ☾
69% 2.9°C 0mm 80% 0cm -5° 6°C 0mm 0.18kPa 24135m 1.9m/s 2m/s
20:00 ☾
71% 2.6°C 0mm 79% 0cm -17° 5.9°C 0mm 0.19kPa 24135m 2m/s 2.1m/s
21:00 ☾
74% 2.3°C 0mm 78% 0cm -28° 5.8°C 0mm 0.2kPa 24135m 2m/s 2.2m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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