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There are 10 upcoming opportunity windows in the next 10 days.

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Rule Fog Hunter

Biei - Fog Hunter - Japan

Biei, Hokkaido, Japan

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions

Fog Probability

Dewpoint Spread2.1°C

Visibility24134 (Clear)

Relative Humidity86%

Wind Speed7.3m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo

Next opportunity

Dense Fog

Biei

Today · 19:00–05:00 · 10h window

High confidence

90%

🌫️Fog Probability61.2-100%

Dewpoint Spread: 0.3°C

Visibility: 535 (Fog)

Relative Humidity: 98%

Wind Speed: 3.3m/s (calm conditions)

Dense Fog at Sunrise

Biei

Tomorrow · 05:00–07:00

🌫️Fog Probability:100%

High

Dense Fog

Biei

Tomorrow · 07:00–09:00

🌫️Fog Probability:92.9-100%

High

Dense Fog

Biei

Tomorrow · 19:00–05:00

🌫️Fog Probability:72.2-100%

High

Dense Fog at Sunrise

Biei

Sat, Mar 14 · 05:00–07:00

🌫️Fog Probability:100%

High

Dense Fog

Biei

Sat, Mar 14 · 07:00–16:00

🌫️Fog Probability:61.1-100%

High

Dense Fog at Sunset

Biei

Sat, Mar 14 · 16:00–18:00

🌫️Fog Probability:100%

High

+3 more windows in the next 10 days

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72-hour requirements breakdown

What passed or failed, hour by hour

40matching hours in the next 74 hoursJump to next match

AND logic: all conditions required

Meets requirement

Misses requirement

Time Asia/Tokyo	Fog Probability ≥ 60.0%
Thu, Mar 12
13:00	0%
14:00	0%
15:00	0%
16:00	0%
17:00	0%
18:00	0%
19:00	61%
20:00	69%
21:00	100%
22:00	100%
23:00	100%
Fri, Mar 13
24:00	100%
01:00	100%
02:00	100%
03:00	100%
04:00	100%
05:00	100%
06:00	100%
07:00	100%
08:00	93%
09:00	47%
10:00	0%
11:00	0%
12:00	44%
13:00	0%
14:00	0%
15:00	0%
16:00	0%
17:00	0%
18:00	0%
19:00	72%
20:00	97%
21:00	94%
22:00	100%
23:00	100%
Sat, Mar 14
24:00	100%
01:00	100%
02:00	100%
03:00	100%
04:00	100%
05:00	100%
06:00	100%
07:00	100%
08:00	97%
09:00	61%
10:00	73%
11:00	88%
12:00	88%
13:00	84%
14:00	84%
15:00	88%
16:00	100%
17:00	100%
18:00	100%
19:00	100%
20:00	100%
21:00	60%
22:00	60%
23:00	60%
Sun, Mar 15
24:00	60%
01:00	40%
02:00	30%
03:00	0%
04:00	0%
05:00	0%
06:00	0%
07:00	0%
08:00	0%
09:00	0%
10:00	0%
11:00	0%
12:00	0%
13:00	0%
14:00	0%

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	Dew Point °C	Rainfall mm	Relative Humidity %	Snowfall cm	Temperature °C	Total Precipitation mm	Vapor Pressure Deficit kPa	Visibility m	Wind Gusts m/s	Wind Speed m/s
Thu, Mar 12 Sunrise 05:47 Sunset 17:31
16:00 ☾	-4.9°C	0.01mm	86%	0cm	-2.8°C	0mm	0.07kPa	24134m	11m/s	7.3m/s
17:00 ☾	-5.3°C	0.01mm	88%	0cm	-3.7°C	0mm	0.05kPa	22354m	11m/s	6.3m/s
18:00 ☾	-5.5°C	0.01mm	92%	0cm	-4.4°C	0mm	0.03kPa	11295m	11m/s	5.4m/s
19:00 ☾	-5.5°C	0.01mm	96%	0cm	-5°C	0mm	0.02kPa	1240m	10m/s	4.6m/s
20:00 ☾	-5.5°C	0.02mm	98%	0.02cm	-5.2°C	0.06mm	0.01kPa	625m	9.3m/s	4m/s
21:00 ☾	-5.6°C	0.02mm	98%	0.02cm	-5.3°C	0.06mm	0.01kPa	535m	8.5m/s	3.3m/s
22:00 ☾	-5.8°C	0.02mm	99%	0.02cm	-5.6°C	0mm	0.01kPa	1196m	7.6m/s	3m/s
23:00 ☾	-6.1°C	0.02mm	98%	0.02cm	-5.9°C	0mm	0.01kPa	1408m	7.6m/s	2.9m/s
Fri, Mar 13 Sunrise 05:47 Sunset 17:31
24:00 ☾	-6.2°C	0.02mm	98%	0.02cm	-6°C	0.06mm	0.01kPa	1264m	7.8m/s	3m/s
01:00 ☾	-6.3°C	0.02mm	99%	0.02cm	-6.1°C	0.06mm	0.01kPa	1201m	7.4m/s	3m/s
02:00 ☾	-6.3°C	0.03mm	99%	0.03cm	-6.1°C	0.13mm	0kPa	973m	7.6m/s	3.1m/s
03:00 ☾	-6.1°C	0.03mm	99%	0.03cm	-5.9°C	0.13mm	0.01kPa	711m	8.4m/s	3.2m/s
04:00 ☾	-5.9°C	0.04mm	98%	0.04cm	-5.6°C	0mm	0.01kPa	732m	8.5m/s	3.3m/s
05:00 ☾	-5.7°C	0.05mm	98%	0.05cm	-5.4°C	0.06mm	0.01kPa	610m	8m/s	3.1m/s
06:00 ☾	-5.7°C	0.04mm	98%	0.04cm	-5.5°C	0.13mm	0.01kPa	748m	7.6m/s	3.1m/s
07:00 ☾	-5.4°C	0.04mm	98%	0.04cm	-5.2°C	0.13mm	0.01kPa	542m	7.7m/s	3.6m/s
08:00 ☾	-5.2°C	0.02mm	96%	0.03cm	-4.7°C	0.19mm	0.02kPa	1326m	6.9m/s	3.9m/s
09:00 ☾	-4.8°C	0.01mm	93%	0.02cm	-3.8°C	0.19mm	0.03kPa	2837m	7.3m/s	4.4m/s
10:00 ☾	-4°C	0.02mm	90%	0.03cm	-2.6°C	0mm	0.05kPa	3299m	7.7m/s	5.1m/s
11:00 ☾	-3.5°C	0.02mm	88%	0.03cm	-1.8°C	0.06mm	0.06kPa	4974m	7.7m/s	5.4m/s
12:00 ☾	-3.3°C	0.02mm	88%	0.04cm	-1.6°C	0.06mm	0.06kPa	2644m	7.9m/s	5.6m/s
13:00 ☾	-3.1°C	0.04mm	87%	0.05cm	-1.2°C	0.13mm	0.08kPa	3301m	8.1m/s	5.6m/s
14:00 ☾	-2.8°C	0.02mm	86%	0.04cm	-0.8°C	0.19mm	0.08kPa	6125m	8.4m/s	5.4m/s
15:00 ☾	-3°C	0.01mm	84%	0cm	-0.58°C	0.19mm	0.1kPa	21164m	7.9m/s	5.2m/s
16:00 ☾	-3.1°C	0.01mm	85%	0.02cm	-0.82°C	0mm	0.09kPa	16082m	8m/s	4.8m/s
17:00 ☾	-3.7°C	0mm	87%	0cm	-1.8°C	0mm	0.07kPa	19611m	8.4m/s	4.2m/s
18:00 ☾	-4.6°C	0.01mm	92%	0cm	-3.4°C	0.06mm	0.04kPa	20909m	7.1m/s	3.2m/s
19:00 ☾	-5.6°C	0.01mm	95%	0cm	-5°C	0.06mm	0.02kPa	13795m	5.7m/s	2.4m/s
20:00 ☾	-6.5°C	0.01mm	98%	0cm	-6.3°C	0.06mm	0.01kPa	4787m	4.5m/s	1.9m/s
21:00 ☾	-5.6°C	0.02mm	98%	0.02cm	-5.3°C	0.06mm	0.01kPa	2014m	6.4m/s	2m/s
22:00 ☾	-5.6°C	0.02mm	97%	0.02cm	-5.3°C	0mm	0.01kPa	1580m	5.2m/s	1.8m/s
23:00 ☾	-5.6°C	0.03mm	97%	0.03cm	-5.3°C	0.06mm	0.01kPa	880m	4.4m/s	1.5m/s
Sat, Mar 14 Sunrise 05:45 Sunset 17:33
24:00 ☾	-5.7°C	0.04mm	97%	0.04cm	-5.2°C	0.06mm	0.01kPa	766m	3.5m/s	1.6m/s
01:00 ☾	-5.4°C	0.03mm	97%	0.03cm	-5°C	0.13mm	0.01kPa	781m	3.7m/s	1.7m/s
02:00 ☾	-5.7°C	0.03mm	97%	0.03cm	-5.3°C	0.13mm	0.01kPa	878m	4.3m/s	2m/s
03:00 ☾	-5.9°C	0.02mm	97%	0.02cm	-5.4°C	0.19mm	0.01kPa	1219m	3.8m/s	1.8m/s
04:00 ☾	-5.9°C	0.02mm	97%	0.02cm	-5.5°C	0mm	0.01kPa	1497m	3.8m/s	1.9m/s
05:00 ☾	-5.9°C	0.03mm	98%	0.03cm	-5.6°C	0.06mm	0.01kPa	981m	3.7m/s	1.9m/s
06:00 ☾	-6.1°C	0.04mm	97%	0.04cm	-5.7°C	0.06mm	0.01kPa	718m	3.9m/s	2m/s
07:00 ☾	-5.6°C	0.05mm	96%	0.05cm	-5.1°C	0.13mm	0.02kPa	655m	3.8m/s	2.3m/s
08:00 ☾	-4.9°C	0.05mm	95%	0.05cm	-4.2°C	0.13mm	0.02kPa	612m	3.7m/s	2.3m/s
09:00 ☾	-4°C	0.01mm	94%	0cm	-3.2°C	0.19mm	0.03kPa	5488m	3.8m/s	2.5m/s
10:00 ☾	-3°C	0.01mm	96%	0cm	-2.4°C	0mm	0.02kPa	2345m	3.7m/s	2.6m/s
11:00 ☾	-2.5°C	0.01mm	95%	0.02cm	-1.8°C	0mm	0.03kPa	531m	3.7m/s	2.8m/s
12:00 ☾	-2.4°C	0.01mm	93%	0.02cm	-1.5°C	0mm	0.04kPa	502m	3.7m/s	2.8m/s
13:00 ☾	-2.2°C	0.02mm	92%	0.03cm	-1.2°C	0.06mm	0.04kPa	292m	4.3m/s	3m/s
14:00 ☾	-2.1°C	0.02mm	91%	0.03cm	-0.92°C	0.06mm	0.05kPa	419m	4.4m/s	3m/s
15:00 ☾	-2°C	0.03mm	93%	0.04cm	-1°C	0.13mm	0.04kPa	962m	3.9m/s	2.4m/s
16:00 ☾	-1.9°C	0.04mm	95%	0.04cm	-1.3°C	0mm	0.03kPa	909m	2.8m/s	1.9m/s
17:00 ☾	-1.9°C	0.02mm	97%	0.02cm	-1.5°C	0.06mm	0.02kPa	1704m	2.5m/s	1.5m/s
18:00 ☾	-2°C	0.05mm	99%	0.05cm	-1.8°C	0.13mm	0.01kPa	661m	1.8m/s	1.1m/s
19:00 ☾	-1.9°C	0.05mm	99%	0.05cm	-1.7°C	0.19mm	0.01kPa	668m	1.7m/s	1.1m/s
20:00 ☾	-1.9°C	0.05mm	99%	0.05cm	-1.7°C	0.19mm	0.01kPa	644m	1.7m/s	1.2m/s
21:00 ☾	-1.8°C	0.05mm	99%	0.05cm	-1.7°C	0.25mm	0.01kPa	586m	2.1m/s	1.3m/s
22:00 ☾	-1.8°C	0.06mm	99%	0.06cm	-1.7°C	0.29mm	0.01kPa	586m	2m/s	1.2m/s
23:00 ☾	-1.9°C	0.07mm	98%	0.07cm	-1.7°C	0.33mm	0.01kPa	586m	1.9m/s	1.1m/s
Sun, Mar 15 Sunrise 05:43 Sunset 17:34
24:00 ☾	-1.9°C	0.08mm	98%	0.08cm	-1.7°C	0.38mm	0.01kPa	586m	1.8m/s	1m/s
01:00 ☾	-1.7°C	0.06mm	96%	0.05cm	-1.2°C	0.42mm	0.02kPa	8436m	1.9m/s	1.1m/s
02:00 ☾	-1.5°C	0.03mm	95%	0.03cm	-0.69°C	0.46mm	0.03kPa	16285m	2m/s	1.1m/s
03:00 ☾	-1.2°C	0.01mm	93%	0cm	-0.19°C	0.5mm	0.04kPa	24135m	2m/s	1.2m/s
04:00 ☾	-1°C	0.007mm	92%	0.07cm	0.16°C	0.42mm	0.05kPa	22749m	3.3m/s	1.9m/s
05:00 ☾	-0.8°C	0.003mm	91%	0.13cm	0.52°C	0.33mm	0.06kPa	21363m	4.5m/s	2.6m/s
06:00 ☾	-0.6°C	0mm	90%	0.2cm	0.87°C	0.25mm	0.07kPa	19977m	5.7m/s	3.3m/s
07:00 ☾	-0.9°C	0.04mm	88%	0.27cm	0.84°C	0.63mm	0.08kPa	14052m	6.1m/s	3.8m/s
08:00 ☾	-1.3°C	0.09mm	86%	0.34cm	0.8°C	1mm	0.09kPa	8127m	6.4m/s	4.2m/s
09:00 ☾	-1.6°C	0.13mm	84%	0.41cm	0.76°C	1.4mm	0.1kPa	2202m	6.7m/s	4.6m/s
10:00 ☾	-3.1°C	0.11mm	85%	0.3cm	-0.85°C	1.2mm	0.09kPa	9404m	5.4m/s	3.6m/s
11:00 ☾	-4.7°C	0.08mm	85%	0.18cm	-2.5°C	1mm	0.08kPa	16606m	4.1m/s	2.6m/s
12:00 ☾	-6.2°C	0.06mm	85%	0.07cm	-4.1°C	0.88mm	0.07kPa	23808m	2.8m/s	1.5m/s
13:00 ☾	-6.7°C	0.04mm	85%	0.05cm	-4.6°C	0.92mm	0.06kPa	23917m	2.5m/s	1.7m/s
14:00 ☾	-7.2°C	0.03mm	86%	0.02cm	-5.2°C	0.96mm	0.06kPa	24026m	2.2m/s	1.8m/s
15:00 ☾	-7.7°C	0.01mm	86%	0cm	-5.8°C	1mm	0.06kPa	24135m	1.9m/s	2m/s

How to read: these inputs help produce the derived score; they are not requirements by themselves.

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