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Rule Mirror Lake

Mirror Lake 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.

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
mirror-lake weather icon
Next opportunity
Perfect Mirror Reflections at Sunset
Biei
Today · 18:00–19:00 · 1h window
Medium confidence
63%
💨Wind Speed0.8m/s
mirror-lake weather icon
Glassy Mirror Reflections (glassy)
Biei
Thu, Jul 23 · 24:00–02:00
💨Wind Speed:0.4-0.7m/s
Low

How this forecast is evaluated

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

Explore Mirror Lake 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
22
recorded matching windows · 69% average confidence
Last 90 days
50
recorded matching windows · 67% average confidence
Last 365 days
71
recorded matching windows · 67% average confidence
Most frequent recorded start hour

19:00 local time, shared by 12 of 71 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
1matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Wind Speed
≤ 1.0m/s
Wind Gusts
≤ 2.0m/s
Precipitation Chance
≤ 10.0%
Visibility
≥ 5000.0m
Wed, Jul 15
10:004.4m/s5.9m/s81%15646m
11:005.3m/s6.8m/s75%24134m
12:006.3m/s7.2m/s65%24135m
13:006.1m/s7.4m/s62%24134m
14:005.8m/s7.5m/s59%24135m
15:005m/s6.9m/s56%24135m
16:004.6m/s7m/s63%24134m
17:004.3m/s7.3m/s44%24135m
18:003.8m/s7.4m/s25%24134m
19:003.2m/s4.5m/s49%24135m
20:003.7m/s5.9m/s73%24135m
21:003.8m/s6.4m/s97%22623m
22:004.1m/s7.3m/s80%19897m
23:004.5m/s7.7m/s90%19824m
Thu, Jul 16
24:004.8m/s8.1m/s100%3694m
01:004.9m/s8.3m/s99%5463m
02:005.1m/s9m/s98%7855m
03:004.2m/s8.8m/s97%3578m
04:004.1m/s7.1m/s98%20314m
05:004.6m/s8m/s96%22642m
06:004.1m/s8.3m/s95%24133m
07:003.9m/s9.7m/s94%18856m
08:003.4m/s8.3m/s93%11959m
09:003m/s7.1m/s93%8297m
10:003.1m/s6m/s62%5198m
11:002.8m/s5.9m/s31%2156m
12:002.1m/s3.9m/s0%19852m
13:002.3m/s3.1m/s0%24135m
14:001.5m/s2.4m/s0%24135m
15:001.4m/s2.3m/s0%24134m
16:001.2m/s2m/s0%24134m
17:001m/s1.8m/s0%24134m
18:000.83m/s1m/s0%24135m
19:001.3m/s1.3m/s0%24135m
20:002.2m/s2m/s0%24135m
21:002.2m/s2.1m/s0%24135m
22:002.6m/s2.4m/s0%24134m
23:002.9m/s2.6m/s0%24135m
Fri, Jul 17
24:003m/s2.7m/s0%24135m
01:002.9m/s2.6m/s0%24134m
02:003m/s2.7m/s0%24135m
03:003m/s2.9m/s0%24134m
04:003m/s3.7m/s10%24134m
05:002.9m/s3.5m/s20%24135m
06:002.7m/s4.4m/s30%24134m
07:002.7m/s5.1m/s29%24135m
08:003.5m/s5.7m/s27%24135m
09:003.9m/s5.6m/s26%24134m
10:004.2m/s5.8m/s45%24135m
11:004.3m/s6.4m/s65%24134m
12:004.1m/s5.7m/s84%24135m
13:003.5m/s4.7m/s85%24135m
14:003.3m/s5.2m/s85%24134m
15:002.7m/s4.9m/s86%24135m
16:003.2m/s4.7m/s64%24134m
17:002.5m/s4.3m/s41%24134m
18:002.2m/s2.3m/s19%24135m
19:002.2m/s2.1m/s21%24134m
20:002.3m/s2.1m/s24%24135m
21:002.2m/s2.1m/s26%24135m
22:002.3m/s2.3m/s26%24135m
23:002.2m/s2.3m/s26%24135m
Sat, Jul 18
24:002.6m/s3.5m/s26%24135m
01:002.5m/s3.1m/s23%24134m
02:002.5m/s3.2m/s19%24134m
03:002.5m/s3.2m/s16%24134m
04:002.7m/s3.9m/s27%24135m
05:002.5m/s3.8m/s38%24135m
06:002.2m/s3.4m/s49%24134m
07:002.8m/s3.7m/s52%24135m
08:003.4m/s4.3m/s55%24134m
09:003.8m/s4.3m/s59%24134m
10:004.4m/s4.5m/s55%24134m
11:004.8m/s5m/s50%24134m
12:005.1m/s5.5m/s46%24135m
13:004.7m/s5.8m/s50%24134m
14:004.6m/s5.7m/s55%20459m
15:004.1m/s6.1m/s59%20558m
16:003.6m/s5.8m/s63%16076m
17:003m/s5.5m/s66%11595m
18:002.5m/s5.2m/s69%7113m
19:002.4m/s5m/s72%6663m
20:002.2m/s4.7m/s75%6214m
21:002.1m/s4.4m/s78%5765m
22:002.7m/s6.2m/s73%10716m
23:003.3m/s7.9m/s69%15667m
Sun, Jul 19
24:003.9m/s9.6m/s64%20618m
01:003.8m/s9.3m/s69%21790m
02:003.7m/s8.9m/s73%22963m
03:003.6m/s8.5m/s78%24135m
04:004m/s9m/s67%24135m
05:004.3m/s9.4m/s57%24135m
06:004.7m/s9.8m/s46%24135m
07:004.9m/s10m/s46%22707m
08:005.2m/s10m/s47%21278m
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

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.

Forecast generated

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