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Rule Fog Hunter

Mount Aso - Fog Hunter - Kyushu

Aso, Kumamoto, Japan

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
63%
Dewpoint Spread0.6°C
Visibility24135 (Clear)
Relative Humidity96%
Wind Speed1.6m/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
Mount Aso
Today · 22:00–23:00 · 1h window
Medium confidence
52%
🌫️Fog Probability62.7%
Dewpoint Spread: 0.6°C
Visibility: 24135 (Clear)
Relative Humidity: 96%
Wind Speed: 1.6m/s (calm conditions)
fog weather icon
Dense Fog
Mount Aso
Sat, Apr 11 · 24:00–01:00
🌫️Fog Probability:100%
Medium

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
10matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Fog Probability
≥ 60.0%
Sat, Apr 4
22:00100%
23:0065%
Sun, Apr 5
24:0061%
01:0030%
02:0063%
03:0061%
04:00100%
05:00100%
06:0092%
07:0075%
08:000%
09:000%
10:000%
11:000%
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15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0039%
22:0063%
23:0057%
Mon, Apr 6
24:0039%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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22:000%
23:000%
Tue, Apr 7
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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23:000%
Wed, Apr 8
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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14:000%
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16:000%
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18:000%
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
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 05:57 Sunset 18:38
22:00 ☾
97% 6.4°C 0mm 96% 0cm -39° 7°C 0mm 0.04kPa 24135m 1.9m/s 1.6m/s
23:00 ☾
99% 6.1°C 0mm 96% 0cm -47° 6.7°C 0mm 0.04kPa 24135m 1.3m/s 1.2m/s
Mon, Apr 6 Sunrise 05:57 Sunset 18:38
24:00 ☾
100% 5.7°C 0mm 94% 0cm -51° 6.6°C 0mm 0.06kPa 24134m 1.3m/s 1.4m/s
01:00 ☾
99% 4.3°C 0mm 87% 0cm -50° 6.4°C 0mm 0.12kPa 24135m 1.4m/s 1.5m/s
02:00 ☾
99% 2.9°C 0mm 79% 0cm -44° 6.1°C 0mm 0.19kPa 24134m 1.3m/s 1.4m/s
03:00 ☾
98% 1.8°C 0mm 73% 0cm -35° 6.3°C 0mm 0.26kPa 24135m 1.4m/s 1.5m/s
04:00 ☾
67% 1.4°C 0mm 68% 0cm -24° 6.8°C 0mm 0.31kPa 24135m 1.4m/s 1.6m/s
05:00 ☾
37% 1.2°C 0mm 67% 0cm -13° 7°C 0mm 0.33kPa 24134m 1.5m/s 1.7m/s
06:00 ☾
6% 1.9°C 0mm 68% 0cm 0.17° 7.5°C 0mm 0.34kPa 24134m 1.7m/s 2.1m/s
07:00 ☾
4% 4.6°C 0mm 71% 0cm 12° 9.6°C 0mm 0.35kPa 24135m 1.5m/s 1.6m/s
08:00 ☾
2% 7°C 0mm 66% 0cm 25° 13°C 0mm 0.51kPa 24135m 2.1m/s 1.3m/s
09:00 ☾
0% 8.1°C 0mm 62% 0cm 37° 15°C 0mm 0.67kPa 24134m 3.4m/s 1.9m/s
10:00 ☾
0% 8.6°C 0mm 58% 0cm 48° 17°C 0mm 0.79kPa 24135m 4.1m/s 2.4m/s
11:00 ☾
0% 8.5°C 0mm 55% 0cm 58° 18°C 0mm 0.92kPa 24134m 6.1m/s 3.5m/s
12:00 ☾
0% 8.3°C 0mm 53% 0cm 63° 18°C 0mm 0.98kPa 24134m 5.5m/s 3.2m/s
13:00 ☾
0% 8.1°C 0mm 51% 0cm 62° 18°C 0mm 1.1kPa 24134m 5.4m/s 3.3m/s
14:00 ☾
0% 7.9°C 0mm 49% 0cm 55° 19°C 0mm 1.1kPa 24134m 5.5m/s 3.2m/s
15:00 ☾
0% 7.6°C 0mm 50% 0cm 44° 18°C 0mm 1.1kPa 24135m 5.2m/s 3.1m/s
16:00 ☾
0% 7.7°C 0mm 53% 0cm 32° 17°C 0mm 0.94kPa 24135m 5.3m/s 2.8m/s
17:00 ☾
0% 9.4°C 0mm 64% 0cm 20° 16°C 0mm 0.66kPa 24134m 3.4m/s 1.6m/s
18:00 ☾
0% 9.2°C 0mm 73% 0cm 7.4° 14°C 0mm 0.42kPa 24134m 1.1m/s 1.1m/s
19:00 ☾
0% 8°C 0mm 72% 0cm -5.1° 13°C 0mm 0.42kPa 24135m 0.71m/s 0.75m/s
20:00 ☾
0% 7.6°C 0mm 71% 0cm -17° 13°C 0mm 0.42kPa 24134m 0.71m/s 0.43m/s
21:00 ☾
0% 6.9°C 0.01mm 68% 0cm -29° 13°C 0mm 0.47kPa 24135m 1.9m/s 1.9m/s
22:00 ☾
0% 6.7°C 0.01mm 67% 0cm -39° 13°C 0.06mm 0.48kPa 24135m 1.8m/s 2m/s
23:00 ☾
0% 7.2°C 0.07mm 71% 0cm -46° 12°C 0.06mm 0.42kPa 24135m 1.1m/s 0.91m/s
Tue, Apr 7 Sunrise 05:56 Sunset 18:38
24:00 ☾
0% 7.7°C 0.16mm 77% 0cm -50° 12°C 0.19mm 0.32kPa 24135m 1m/s 1.1m/s
01:00 ☾
0% 8.1°C 0.21mm 84% 0cm -49° 11°C 0.44mm 0.21kPa 24134m 1.5m/s 1.6m/s
02:00 ☾
0% 8.4°C 0.63mm 87% 0cm -44° 10°C 0.88mm 0.16kPa 17104m 0.92m/s 1m/s
03:00 ☾
0% 8.8°C 2.2mm 94% 0cm -35° 9.7°C 2.6mm 0.07kPa 6683m 1.4m/s 1.3m/s
04:00 ☾
0% 9°C 1.6mm 97% 0cm -24° 9.5°C 2.3mm 0.04kPa 8607m 2.8m/s 1.6m/s
05:00 ☾
0% 9°C 1.5mm 98% 0cm -12° 9.4°C 3.8mm 0.03kPa 8649m 3.9m/s 2m/s
06:00 ☾
0% 9°C 0.62mm 98% 0cm 0.4° 9.4°C 4.6mm 0.03kPa 4979m 4m/s 2m/s
07:00 ☾
0% 9.1°C 0.22mm 97% 0cm 13° 9.5°C 4.9mm 0.03kPa 7068m 3.5m/s 1.9m/s
08:00 ☾
0% 7.8°C 0.49mm 94% 0cm 25° 8.6°C 5.3mm 0.06kPa 18135m 5.2m/s 3.1m/s
09:00 ☾
0% 5.7°C 0.11mm 90% 0cm 37° 7.3°C 5.8mm 0.1kPa 24134m 5.5m/s 3m/s
10:00 ☾
3% 6.3°C 0mm 91% 0cm 49° 7.7°C 0.06mm 0.1kPa 24134m 3.6m/s 2.1m/s
11:00 ☾
6% 4.8°C 0mm 58% 0cm 58° 13°C 0.06mm 0.62kPa 24135m 5.6m/s 2.6m/s
12:00 ☾
9% 1.3°C 0mm 42% 0cm 64° 14°C 0.06mm 0.93kPa 24134m 5.7m/s 3.4m/s
13:00 ☾
12% 1.8°C 0mm 42% 0cm 62° 15°C 0.06mm 0.96kPa 24134m 7.8m/s 3.5m/s
14:00 ☾
14% 0.8°C 0mm 39% 0cm 55° 15°C 0.06mm 1kPa 24135m 9.2m/s 4.6m/s
15:00 ☾
17% -0.4°C 0mm 38% 0cm 44° 14°C 0.06mm 0.96kPa 24134m 9.3m/s 5.4m/s
16:00 ☾
43% -0.3°C 0mm 43% 0cm 32° 12°C 0mm 0.79kPa 24135m 7.5m/s 5.6m/s
17:00 ☾
70% 0.8°C 0mm 51% 0cm 20° 11°C 0mm 0.62kPa 24134m 6.4m/s 4.2m/s
18:00 ☾
96% 0.7°C 0mm 58% 0cm 7.6° 8.4°C 0mm 0.46kPa 24135m 6m/s 3m/s
19:00 ☾
97% 0°C 0mm 69% 0cm -4.9° 5.2°C 0mm 0.27kPa 24134m 1.8m/s 1.9m/s
20:00 ☾
98% -0.4°C 0mm 72% 0cm -17° 4.3°C 0mm 0.24kPa 24134m 1.7m/s 2m/s
21:00 ☾
99% -1°C 0mm 71% 0cm -28° 3.7°C 0mm 0.23kPa 24135m 1.7m/s 1.9m/s
22:00 ☾
99% -1.9°C 0mm 69% 0cm -38° 3.3°C 0mm 0.24kPa 24135m 1.8m/s 2m/s
23:00 ☾
100% -2.7°C 0mm 67% 0cm -46° 2.8°C 0mm 0.25kPa 24135m 1.7m/s 2m/s
Wed, Apr 8 Sunrise 05:55 Sunset 18:39
24:00 ☾
100% -3.2°C 0mm 65% 0cm -50° 2.6°C 0mm 0.26kPa 24134m 1.6m/s 1.9m/s
01:00 ☾
99% -3.6°C 0mm 64% 0cm -49° 2.5°C 0mm 0.26kPa 24134m 1.7m/s 1.9m/s
02:00 ☾
99% -4°C 0mm 62% 0cm -43° 2.5°C 0mm 0.28kPa 24135m 1.6m/s 2m/s
03:00 ☾
98% -4.2°C 0mm 61% 0cm -34° 2.5°C 0mm 0.28kPa 24135m 1.7m/s 2m/s
04:00 ☾
97% -2.6°C 0mm 51% 0cm -24° 6.8°C 0mm 0.48kPa 24135m 1.7m/s 1.8m/s
05:00 ☾
95% -1.5°C 0mm 42% 0cm -12° 11°C 0mm 0.76kPa 24135m 1.7m/s 1.6m/s
06:00 ☾
94% -1.3°C 0mm 32% 0cm 0.62° 15°C 0mm 1.2kPa 24135m 1.6m/s 1.4m/s
07:00 ☾
94% -0.7°C 0mm 33% 0cm 13° 15°C 0mm 1.2kPa 24135m 1.8m/s 1.8m/s
08:00 ☾
94% -0.1°C 0mm 34% 0cm 25° 16°C 0mm 1.2kPa 24135m 2m/s 2.2m/s
09:00 ☾
94% 0.4°C 0mm 35% 0cm 38° 16°C 0mm 1.1kPa 24135m 2.2m/s 2.6m/s
10:00 ☾
92% 1.6°C 0mm 44% 0cm 49° 14°C 0mm 0.89kPa 24135m 2m/s 2.3m/s
11:00 ☾
91% 2.3°C 0mm 52% 0cm 59° 12°C 0mm 0.67kPa 24135m 1.8m/s 2m/s
12:00 ☾
89% 2.6°C 0mm 60% 0cm 64° 10°C 0mm 0.49kPa 24135m 1.5m/s 1.7m/s
13:00 ☾
87% 1.6°C 0mm 61% 0cm 62° 8.7°C 0mm 0.44kPa 24135m 1.4m/s 1.6m/s
14:00 ☾
84% 0.6°C 0mm 62% 0cm 55° 7.5°C 0mm 0.4kPa 24135m 1.3m/s 1.5m/s
15:00 ☾
82% -0.4°C 0mm 63% 0cm 44° 6.2°C 0mm 0.36kPa 24135m 1.2m/s 1.3m/s
16:00 ☾
76% 0.1°C 0mm 66% 0cm 33° 6.1°C 0mm 0.32kPa 24135m 1.4m/s 1.6m/s
17:00 ☾
71% 0.5°C 0mm 68% 0cm 20° 5.9°C 0mm 0.29kPa 24135m 1.5m/s 1.8m/s
18:00 ☾
65% 0.9°C 0mm 71% 0cm 7.7° 5.7°C 0mm 0.26kPa 24135m 1.6m/s 2m/s
19:00 ☾
67% 1.4°C 0mm 75% 0cm -4.8° 5.5°C 0mm 0.23kPa 24135m 1.7m/s 2.1m/s
20:00 ☾
70% 1.8°C 0mm 78% 0cm -17° 5.4°C 0mm 0.2kPa 24135m 1.8m/s 2.2m/s
21:00 ☾
72% 2.3°C 0mm 81% 0cm -28° 5.2°C 0mm 0.17kPa 24135m 1.8m/s 2.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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