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Rule Fog Hunter

Fog Hunter Forecast for Biei, Japan

Biei, Hokkaido, Japan

Biei's rolling fields create clean bands of color and isolated-tree studies, while the Blue Pond and birch woods add reflective winter subjects.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.3°C
Visibility24135 (Clear)
Relative Humidity92%
Wind Speed1.7m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
fog weather icon
Next opportunity
Dense Fog at Sunrise
Biei
Tue, Aug 25 · 04:00–06:00 · 2h window
High confidence
87%
🌫️Fog Probability100%
Dewpoint Spread: 0.1°C
Visibility: 81 (Dense fog)
Relative Humidity: 100%
Wind Speed: 2.5m/s (calm conditions)

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Japan. The requirements and hourly values below show how those signals apply at Biei.

Explore Fog Hunter conditions across Japan →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Biei during the last 365 days.

Last 30 days
5
recorded matching windows · 88% average confidence
Last 90 days
14
recorded matching windows · 85% average confidence
Last 365 days
19
recorded matching windows · 86% average confidence
Most represented month

June, with 6 of 19 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Fog Probability
≥ 75.0%
Sat, Aug 22
04:000%
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, Aug 23
24:000%
01:000%
02:000%
03:000%
04:000%
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%
21:0053%
22:000%
23:000%
Mon, Aug 24
24:000%
01:000%
02:000%
03:000%
04:000%
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%
Tue, Aug 25
24:000%
01:000%
02:000%
03:000%
04:00100%
05:00100%
06:0067%
07:0057%
08:0031%
09:0023%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0053%
20:000%
21:0053%
22:000%
23:000%
Wed, Aug 26
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, Aug 23 Sunrise 04:42 Sunset 18:23
05:00 ☾
28% 16°C 0mm 92% 0cm 2.4° 17°C 0mm 0.16kPa 24135m 1.6m/s 1.7m/s
06:00 ☾
0% 17°C 0mm 89% 0cm 13° 19°C 0mm 0.23kPa 24135m 1.9m/s 1.6m/s
07:00 ☾
0% 18°C 0mm 84% 0cm 24° 20°C 0mm 0.39kPa 24134m 2.6m/s 1.8m/s
08:00 ☾
0% 18°C 0mm 78% 0cm 34° 22°C 0mm 0.6kPa 24134m 2.6m/s 2m/s
09:00
0% 19°C 0mm 71% 0cm 44° 24°C 0mm 0.85kPa 24134m 2.4m/s 2.2m/s
10:00
26% 18°C 0mm 67% 0cm 52° 25°C 0mm 1.1kPa 24134m 3m/s 2.7m/s
11:00
52% 18°C 0mm 60% 0cm 57° 26°C 0mm 1.4kPa 24134m 3.2m/s 2.6m/s
12:00
78% 17°C 0mm 55% 0cm 57° 27°C 0mm 1.6kPa 24134m 3.4m/s 2.2m/s
13:00
62% 17°C 0mm 51% 0cm 53° 27°C 0mm 1.8kPa 24134m 3.8m/s 2.9m/s
14:00
45% 17°C 0mm 53% 0cm 45° 27°C 0mm 1.7kPa 24135m 4.1m/s 3.9m/s
15:00
29% 17°C 0mm 57% 0cm 35° 26°C 0mm 1.5kPa 24135m 4.8m/s 3.7m/s
16:00
24% 18°C 0mm 63% 0cm 25° 25°C 0mm 1.2kPa 24135m 5.6m/s 3.4m/s
17:00
18% 18°C 0mm 72% 0cm 14° 23°C 0mm 0.79kPa 24134m 4.9m/s 2.7m/s
18:00
13% 17°C 0mm 81% 0cm 3.2° 20°C 0mm 0.46kPa 24134m 4.8m/s 3.2m/s
19:00 ☾
19% 16°C 0mm 89% 0cm -7.3° 18°C 0mm 0.24kPa 24134m 3.8m/s 3.1m/s
20:00 ☾
24% 17°C 0mm 93% 0cm -17° 18°C 0mm 0.13kPa 24135m 3.4m/s 2.7m/s
21:00 ☾
30% 17°C 0mm 95% 0cm -25° 17°C 0mm 0.09kPa 24135m 5.6m/s 3.3m/s
22:00 ☾
34% 16°C 0mm 95% 0cm -31° 17°C 0mm 0.09kPa 24135m 3.4m/s 2.7m/s
23:00 ☾
38% 16°C 0mm 95% 0cm -35° 17°C 0mm 0.1kPa 24134m 5.3m/s 3.2m/s
Mon, Aug 24 Sunrise 04:43 Sunset 18:21
24:00 ☾
42% 16°C 0mm 94% 0cm -35° 16°C 0mm 0.1kPa 24135m 4.7m/s 3.2m/s
01:00 ☾
32% 15°C 0mm 93% 0cm -32° 16°C 0mm 0.12kPa 24135m 4.3m/s 3m/s
02:00 ☾
22% 14°C 0mm 90% 0cm -26° 16°C 0mm 0.19kPa 24134m 4.7m/s 3.2m/s
03:00 ☾
12% 14°C 0mm 87% 0cm -18° 16°C 0mm 0.24kPa 24135m 4.6m/s 3.2m/s
04:00 ☾
8% 14°C 0mm 87% 0cm -8.3° 16°C 0mm 0.24kPa 24134m 4.6m/s 3.1m/s
05:00 ☾
4% 14°C 0mm 87% 0cm 2.2° 16°C 0mm 0.24kPa 24134m 5.1m/s 3.2m/s
06:00 ☾
0% 15°C 0mm 87% 0cm 13° 17°C 0mm 0.25kPa 24134m 7.6m/s 3.5m/s
07:00 ☾
0% 17°C 0mm 85% 0cm 23° 19°C 0mm 0.35kPa 24134m 8.5m/s 4.2m/s
08:00 ☾
0% 17°C 0mm 79% 0cm 34° 21°C 0mm 0.51kPa 24134m 7.9m/s 5.3m/s
09:00
0% 18°C 0mm 74% 0cm 44° 23°C 0mm 0.73kPa 24134m 6.8m/s 5m/s
10:00
0% 18°C 0mm 69% 0cm 52° 24°C 0mm 0.93kPa 24134m 6.2m/s 4.5m/s
11:00
0% 18°C 0mm 65% 0cm 57° 25°C 0mm 1.1kPa 24134m 5.8m/s 3.9m/s
12:00
0% 18°C 0mm 64% 0cm 57° 26°C 0mm 1.2kPa 24135m 6m/s 3.9m/s
13:00
0% 19°C 0mm 71% 0cm 52° 25°C 0.25mm 0.94kPa 14162m 6m/s 3.6m/s
14:00
0% 20°C 0.01mm 77% 0cm 45° 24°C 0.69mm 0.69kPa 12471m 6.2m/s 3.2m/s
15:00
0% 19°C 0mm 83% 0cm 35° 22°C 1.1mm 0.45kPa 22140m 4.6m/s 2.6m/s
16:00
0% 19°C 0mm 87% 0cm 24° 22°C 0mm 0.35kPa 24134m 5m/s 2.9m/s
17:00
0% 19°C 0.37mm 90% 0cm 14° 21°C 0.31mm 0.25kPa 24134m 6.7m/s 3.3m/s
18:00
0% 19°C 1.1mm 93% 0cm 2.9° 20°C 1.3mm 0.17kPa 12816m 5.9m/s 2.9m/s
19:00 ☾
0% 18°C 1.2mm 96% 0cm -7.6° 19°C 2.8mm 0.1kPa 16050m 6.4m/s 3.3m/s
20:00 ☾
0% 18°C 6.9mm 97% 0cm -17° 19°C 9.4mm 0.06kPa 3196m 6.8m/s 3.6m/s
21:00 ☾
0% 19°C 7.4mm 98% 0cm -25° 19°C 17mm 0.04kPa 2603m 4m/s 1.5m/s
22:00 ☾
0% 19°C 15mm 99% 0cm -31° 19°C 8.3mm 0.02kPa 1332m 1.3m/s 0.86m/s
23:00 ☾
0% 19°C 24mm 100% 0cm -35° 19°C 26mm 0.01kPa 476m 2.1m/s 1.7m/s
Tue, Aug 25 Sunrise 04:44 Sunset 18:19
24:00 ☾
0% 19°C 3.2mm 99% 0cm -35° 19°C 38mm 0.02kPa 561m 1.3m/s 1.1m/s
01:00 ☾
0% 19°C 2.3mm 100% 0cm -32° 19°C 41mm 0kPa 172m 3.3m/s 2.2m/s
02:00 ☾
0% 19°C 0.93mm 100% 0cm -26° 19°C 43mm 0.01kPa 90m 4.1m/s 1.8m/s
03:00 ☾
0% 19°C 0.01mm 99% 0cm -18° 19°C 43mm 0.02kPa 144m 1.7m/s 1.6m/s
04:00 ☾
0% 18°C 0mm 100% 0cm -8.5° 18°C 0mm 0.01kPa 81m 3.6m/s 2.5m/s
05:00 ☾
1% 17°C 0.08mm 99% 0cm 2° 17°C 0.19mm 0.02kPa 60m 3.6m/s 2.4m/s
06:00 ☾
1% 17°C 0.04mm 99% 0cm 13° 17°C 0.25mm 0.02kPa 113m 2.5m/s 1.7m/s
07:00 ☾
1% 17°C 0.01mm 99% 0cm 23° 17°C 0.38mm 0.02kPa 564m 2.1m/s 1.5m/s
08:00 ☾
0% 17°C 0.01mm 98% 0cm 34° 17°C 0.38mm 0.04kPa 19957m 2.1m/s 1.7m/s
09:00
0% 17°C 0mm 96% 0cm 44° 18°C 0.38mm 0.09kPa 24134m 1.9m/s 1.7m/s
10:00
5% 17°C 0mm 95% 0cm 52° 18°C 0.25mm 0.11kPa 24134m 1.8m/s 1.7m/s
11:00
10% 17°C 0mm 93% 0cm 56° 18°C 0.13mm 0.14kPa 24134m 1.7m/s 1.6m/s
12:00
15% 17°C 0mm 92% 0cm 57° 18°C 0mm 0.16kPa 24135m 1.6m/s 1.5m/s
13:00
14% 17°C 0mm 93% 0cm 52° 18°C 0mm 0.15kPa 22799m 2m/s 1.8m/s
14:00
13% 17°C 0mm 93% 0cm 44° 18°C 0mm 0.14kPa 21464m 2.4m/s 2.1m/s
15:00
12% 16°C 0mm 94% 0cm 35° 17°C 0mm 0.13kPa 20128m 2.8m/s 2.4m/s
16:00
12% 16°C 0mm 94% 0cm 24° 17°C 0mm 0.11kPa 20160m 2.9m/s 2.5m/s
17:00
11% 15°C 0mm 95% 0cm 13° 16°C 0mm 0.1kPa 20191m 3m/s 2.5m/s
18:00
11% 15°C 0mm 95% 0cm 2.7° 16°C 0mm 0.09kPa 20223m 3.1m/s 2.5m/s
19:00 ☾
9% 15°C 0mm 95% 0cm -7.9° 16°C 0mm 0.09kPa 20122m 3.4m/s 2.6m/s
20:00 ☾
7% 15°C 0mm 95% 0cm -17° 16°C 0mm 0.09kPa 20020m 3.6m/s 2.7m/s
21:00 ☾
5% 15°C 0mm 95% 0cm -26° 16°C 0mm 0.09kPa 19919m 3.8m/s 2.8m/s
22:00 ☾
7% 15°C 0mm 94% 0cm -32° 16°C 0.02mm 0.11kPa 20027m 4.3m/s 3m/s
23:00 ☾
9% 15°C 0mm 92% 0cm -35° 17°C 0.04mm 0.15kPa 20135m 4.8m/s 3.1m/s
Wed, Aug 26 Sunrise 04:45 Sunset 18:18
24:00 ☾
11% 16°C 0mm 91% 0cm -35° 17°C 0.06mm 0.18kPa 20244m 5.2m/s 3.2m/s
01:00 ☾
9% 16°C 0mm 88% 0cm -32° 18°C 0.06mm 0.26kPa 21540m 5.5m/s 3.7m/s
02:00 ☾
6% 16°C 0mm 84% 0cm -26° 19°C 0.06mm 0.34kPa 22835m 5.8m/s 4.1m/s
03:00 ☾
4% 17°C 0mm 81% 0cm -18° 20°C 0.06mm 0.43kPa 24131m 6m/s 4.5m/s
04:00 ☾
3% 16°C 0mm 82% 0cm -8.7° 19°C 0.04mm 0.41kPa 22723m 6.4m/s 4.8m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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