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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
30%
Dewpoint Spread0.8°C
Visibility18147 (Clear)
Relative Humidity95%
Wind Speed0.8m/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
Yufuin
Tue, Apr 21 · 04:00–05:00 · 1h window
Medium confidence
40%
🌫️Fog Probability62.7%
Dewpoint Spread: 0.5°C
Visibility: 24134 (Clear)
Relative Humidity: 97%
Wind Speed: 2.4m/s (calm conditions)
fog weather icon
Moderate Fog at Sunset
Yufuin
Thu, Apr 23 · 18:00–19:00
🌫️Fog Probability:66.7%
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
1matching 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 18
04:0037%
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%
Sun, Apr 19
24:000%
01:000%
02:000%
03:000%
04:0030%
05:000%
06:000%
07:000%
08:000%
09:000%
10:0043%
11:000%
12:000%
13:000%
14:000%
15:000%
16:0016%
17:009.9%
18:0034%
19:0051%
20:0052%
21:000%
22:000%
23:000%
Mon, Apr 20
24:000%
01:000%
02:000%
03:000%
04:0059%
05:0053%
06:0053%
07:0030%
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%
22:0033%
23:0033%
Tue, Apr 21
24:0047%
01:000%
02:000%
03:000%
04:0063%
05:0040%
06:0025%
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%
Wed, Apr 22
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
Sun, Apr 19 Sunrise 05:41 Sunset 18:46
04:00 ☾
0% 13°C 0.41mm 95% 0cm -20° 14°C 0.31mm 0.08kPa 18147m 1m/s 0.79m/s
05:00 ☾
0% 13°C 1.1mm 98% 0cm -8.9° 14°C 1.1mm 0.03kPa 2335m 0.61m/s 0.46m/s
06:00 ☾
0% 14°C 2.6mm 99% 0cm 3.4° 14°C 2.8mm 0.02kPa 1802m 0.9m/s 0.74m/s
07:00 ☾
0% 14°C 2.4mm 99% 0cm 16° 14°C 5.6mm 0.02kPa 1569m 0.91m/s 0.45m/s
08:00 ☾
0% 14°C 0.32mm 99% 0cm 28° 14°C 6.8mm 0.01kPa 3592m 0.8m/s 0.28m/s
09:00
0% 14°C 0.33mm 99% 0cm 41° 14°C 7.1mm 0.01kPa 3049m 1.7m/s 0.97m/s
10:00
0% 14°C 0.97mm 98% 0cm 52° 15°C 0.75mm 0.03kPa 4205m 3m/s 1.7m/s
11:00
0% 14°C 0.92mm 97% 0cm 62° 15°C 1.9mm 0.04kPa 5089m 3.3m/s 1.6m/s
12:00
0% 14°C 0.4mm 99% 0cm 68° 14°C 3mm 0.02kPa 3301m 3.8m/s 1.7m/s
13:00
0% 14°C 0mm 98% 0cm 66° 14°C 3.1mm 0.03kPa 2584m 3m/s 1.4m/s
14:00
0% 14°C 0mm 96% 0cm 57° 15°C 3.2mm 0.07kPa 3787m 4.2m/s 1.9m/s
15:00
0% 14°C 0mm 97% 0cm 46° 15°C 3.3mm 0.05kPa 2710m 4.4m/s 1.9m/s
16:00
0% 15°C 0.01mm 95% 0cm 34° 16°C 0.19mm 0.09kPa 3159m 5.1m/s 2.2m/s
17:00
0% 15°C 0mm 95% 0cm 21° 16°C 0.31mm 0.09kPa 5481m 4.5m/s 2m/s
18:00
0% 15°C 0mm 96% 0cm 9° 15°C 0.38mm 0.06kPa 4188m 4m/s 1.8m/s
19:00 ☾
0% 14°C 0.01mm 98% 0cm -3.2° 14°C 0.5mm 0.04kPa 3928m 3m/s 1.2m/s
20:00 ☾
0% 14°C 0.2mm 98% 0cm -15° 14°C 0.63mm 0.03kPa 2743m 2.1m/s 1.1m/s
21:00 ☾
0% 14°C 1.1mm 100% 0cm -26° 14°C 1.3mm 0.01kPa 542m 3.9m/s 1.2m/s
22:00 ☾
0% 15°C 0.59mm 100% 0cm -35° 15°C 1.1mm 0kPa 183m 4m/s 1.4m/s
23:00 ☾
0% 15°C 0.08mm 100% 0cm -42° 15°C 1.4mm 0kPa 163m 2.6m/s 1.3m/s
Mon, Apr 20 Sunrise 05:40 Sunset 18:47
24:00 ☾
0% 15°C 0mm 99% 0cm -45° 15°C 1.4mm 0.01kPa 328m 2.8m/s 1.1m/s
01:00 ☾
0% 14°C 0mm 99% 0cm -44° 14°C 1.4mm 0.02kPa 2625m 2.2m/s 1.4m/s
02:00 ☾
0% 14°C 0mm 98% 0cm -39° 14°C 1.4mm 0.04kPa 17570m 1.4m/s 1.2m/s
03:00 ☾
0% 13°C 0mm 97% 0cm -30° 13°C 1.4mm 0.05kPa 24135m 1.1m/s 0.92m/s
04:00 ☾
2% 12°C 0mm 96% 0cm -20° 13°C 0mm 0.06kPa 24134m 1.1m/s 1.1m/s
05:00 ☾
3% 12°C 0mm 96% 0cm -8.6° 13°C 0mm 0.07kPa 24135m 0.9m/s 0.96m/s
06:00 ☾
5% 12°C 0mm 95% 0cm 3.6° 13°C 0mm 0.07kPa 22781m 1m/s 1m/s
07:00 ☾
4% 14°C 0mm 94% 0cm 16° 14°C 0mm 0.09kPa 19265m 2.2m/s 1.4m/s
08:00 ☾
3% 14°C 0mm 90% 0cm 28° 16°C 0mm 0.18kPa 24134m 4.3m/s 1.7m/s
09:00
2% 15°C 0mm 83% 0cm 41° 18°C 0.06mm 0.35kPa 23126m 5.1m/s 2.3m/s
10:00
3% 15°C 0mm 77% 0cm 53° 19°C 0.06mm 0.51kPa 24128m 4.4m/s 2.4m/s
11:00
4% 15°C 0mm 72% 0cm 63° 20°C 0.44mm 0.64kPa 17710m 3.1m/s 2m/s
12:00
5% 15°C 0mm 71% 0cm 68° 20°C 0.81mm 0.69kPa 20275m 3.6m/s 3m/s
13:00
5% 16°C 0mm 76% 0cm 66° 20°C 1.3mm 0.55kPa 17408m 4.3m/s 3.3m/s
14:00
6% 16°C 0mm 75% 0cm 57° 20°C 1.8mm 0.59kPa 19867m 4.4m/s 3.6m/s
15:00
6% 16°C 0mm 75% 0cm 46° 21°C 2.3mm 0.61kPa 24134m 4.6m/s 3.9m/s
16:00
5% 16°C 0mm 80% 0cm 34° 19°C 0.5mm 0.45kPa 21521m 5.3m/s 3.2m/s
17:00
5% 16°C 0mm 83% 0cm 22° 19°C 1.1mm 0.39kPa 15576m 3.3m/s 2m/s
18:00
4% 16°C 0mm 89% 0cm 9.2° 18°C 1.4mm 0.22kPa 24134m 2.1m/s 1.3m/s
19:00 ☾
3% 15°C 0mm 93% 0cm -3.1° 16°C 1.6mm 0.13kPa 23474m 1.2m/s 0.91m/s
20:00 ☾
2% 15°C 0.01mm 95% 0cm -15° 16°C 1.8mm 0.09kPa 24134m 1.9m/s 1.7m/s
21:00 ☾
1% 15°C 0mm 96% 0cm -26° 15°C 1.8mm 0.07kPa 24135m 1.3m/s 1.2m/s
22:00 ☾
4% 15°C 0.44mm 97% 0cm -35° 15°C 0.38mm 0.06kPa 20516m 1.4m/s 1.3m/s
23:00 ☾
7% 15°C 0.04mm 97% 0cm -42° 15°C 0.75mm 0.06kPa 22500m 0.71m/s 0.39m/s
Tue, Apr 21 Sunrise 05:39 Sunset 18:48
24:00 ☾
10% 14°C 0.02mm 98% 0cm -45° 15°C 0.94mm 0.04kPa 24135m 0.5m/s 0.37m/s
01:00 ☾
7% 14°C 0mm 97% 0cm -44° 15°C 1.2mm 0.05kPa 24135m 1m/s 0.96m/s
02:00 ☾
5% 14°C 0mm 97% 0cm -38° 15°C 1.5mm 0.05kPa 18578m 1.6m/s 1.4m/s
03:00 ☾
2% 13°C 0mm 98% 0cm -30° 14°C 1.7mm 0.04kPa 16472m 2.5m/s 1.9m/s
04:00 ☾
1% 13°C 0mm 97% 0cm -20° 14°C 0.13mm 0.05kPa 24134m 4.8m/s 2.4m/s
05:00 ☾
1% 13°C 0mm 95% 0cm -8.4° 13°C 0.19mm 0.08kPa 24134m 6.1m/s 2.8m/s
06:00 ☾
0% 12°C 0mm 94% 0cm 3.9° 12°C 0.19mm 0.09kPa 24134m 6m/s 2.8m/s
07:00 ☾
0% 11°C 0mm 91% 0cm 16° 12°C 0.19mm 0.13kPa 24135m 5.5m/s 2.2m/s
08:00 ☾
0% 9.6°C 0mm 75% 0cm 29° 14°C 0.19mm 0.4kPa 24134m 3.6m/s 2.1m/s
09:00
0% 4.8°C 0mm 48% 0cm 41° 16°C 0.19mm 0.91kPa 24135m 2.4m/s 1.4m/s
10:00
6% 5.9°C 0mm 53% 0cm 53° 15°C 0.13mm 0.82kPa 24135m 2m/s 1.3m/s
11:00
12% 6.8°C 0mm 58% 0cm 63° 15°C 0.06mm 0.73kPa 24135m 1.6m/s 1.3m/s
12:00
18% 7.7°C 0mm 62% 0cm 68° 15°C 0mm 0.64kPa 24135m 1.1m/s 1.2m/s
13:00
19% 6.5°C 0mm 64% 0cm 66° 13°C 0mm 0.55kPa 24135m 1.4m/s 1.6m/s
14:00
19% 5.2°C 0mm 65% 0cm 58° 11°C 0mm 0.47kPa 24135m 1.7m/s 1.9m/s
15:00
20% 3.9°C 0mm 67% 0cm 46° 9.8°C 0mm 0.4kPa 24135m 2m/s 2.3m/s
16:00
26% 3.1°C 0mm 65% 0cm 34° 9.4°C 0mm 0.41kPa 24135m 2.1m/s 2.4m/s
17:00
33% 2.3°C 0mm 63% 0cm 22° 9°C 0mm 0.43kPa 24135m 2.1m/s 2.4m/s
18:00
39% 1.5°C 0mm 60% 0cm 9.3° 8.7°C 0mm 0.44kPa 24135m 2.1m/s 2.4m/s
19:00 ☾
38% 0.7°C 0mm 58% 0cm -2.9° 8.6°C 0mm 0.47kPa 24135m 2m/s 2.3m/s
20:00 ☾
36% 0°C 0mm 55% 0cm -15° 8.6°C 0mm 0.51kPa 24135m 1.9m/s 2.2m/s
21:00 ☾
35% -0.8°C 0mm 52% 0cm -26° 8.5°C 0mm 0.54kPa 24135m 1.8m/s 2m/s
22:00 ☾
34% -0.7°C 0mm 52% 0cm -35° 8.5°C 0mm 0.53kPa 24135m 1.9m/s 2.1m/s
23:00 ☾
33% -0.5°C 0mm 53% 0cm -42° 8.5°C 0mm 0.52kPa 24135m 1.9m/s 2.1m/s
Wed, Apr 22 Sunrise 05:38 Sunset 18:48
24:00 ☾
32% -0.3°C 0mm 54% 0cm -45° 8.4°C 0mm 0.51kPa 24135m 1.9m/s 2.1m/s
01:00 ☾
30% 1.1°C 0mm 49% 0cm -43° 12°C 0mm 0.69kPa 24135m 1.8m/s 1.7m/s
02:00 ☾
28% 2.4°C 0mm 44% 0cm -38° 15°C 0mm 0.94kPa 24135m 1.7m/s 1.3m/s
03:00 ☾
26% 3.4°C 0mm 38% 0cm -30° 18°C 0mm 1.3kPa 24135m 1.6m/s 0.94m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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