Rule
Mirror Lake
Biei - Mirror Lake - Japan
Biei, Hokkaido, Japan
Perfectly calm water for flawless reflections
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Asia/Tokyo
Next opportunity
Glassy Mirror Reflections (glassy) at Sunset
Biei
Today · 18:00–19:00 · 1h window
High confidence
79%
💨Wind Speed0.1m/s
Perfect Mirror Reflections
Biei
Mon, Apr 20 · 01:00–04:00
💨Wind Speed:0.9-1m/s
Low
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72-hour requirements breakdown
What passed or failed, hour by hourAND 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, Apr 15 | ||||
| 11:00 | 2.1m/s | 1.2m/s | 18% | 24135m |
| 12:00 | 2.3m/s | 1.5m/s | 27% | 24135m |
| 13:00 | 2.7m/s | 2m/s | 39% | 24135m |
| 14:00 | 2.4m/s | 1.7m/s | 51% | 24135m |
| 15:00 | 1.8m/s | 1.3m/s | 62% | 24135m |
| 16:00 | 1.4m/s | 1.2m/s | 42% | 24134m |
| 17:00 | 1.6m/s | 2.5m/s | 46% | 24135m |
| 18:00 | 1.4m/s | 2.1m/s | 49% | 24135m |
| 19:00 | 0.71m/s | 1.1m/s | 56% | 24135m |
| 20:00 | 2.1m/s | 3.1m/s | 62% | 20415m |
| 21:00 | 2.5m/s | 3.4m/s | 69% | 19893m |
| 22:00 | 1.9m/s | 2.4m/s | 55% | 19944m |
| 23:00 | 0.94m/s | 1.2m/s | 28% | 19916m |
| Thu, Apr 16 | ||||
| 24:00 | 0.64m/s | 0.8m/s | 0% | 19876m |
| 01:00 | 0.89m/s | 1m/s | 0% | 19860m |
| 02:00 | 0.83m/s | 1.1m/s | 0% | 24135m |
| 03:00 | 1.1m/s | 1.2m/s | 0% | 24134m |
| 04:00 | 1.6m/s | 1.6m/s | 0% | 24134m |
| 05:00 | 1.5m/s | 1.5m/s | 0% | 24135m |
| 06:00 | 1.3m/s | 1.6m/s | 0% | 24134m |
| 07:00 | 0.64m/s | 0.9m/s | 0% | 24135m |
| 08:00 | 0.49m/s | 1.3m/s | 0% | 24134m |
| 09:00 | 0.75m/s | 1.8m/s | 0% | 24134m |
| 10:00 | 2.1m/s | 2.3m/s | 0% | 24134m |
| 11:00 | 2.6m/s | 2.9m/s | 0% | 24134m |
| 12:00 | 2.5m/s | 3m/s | 0% | 24135m |
| 13:00 | 2.5m/s | 2.8m/s | 0% | 24135m |
| 14:00 | 3.4m/s | 2.9m/s | 0% | 24135m |
| 15:00 | 2.6m/s | 2.4m/s | 0% | 24135m |
| 16:00 | 1.7m/s | 1.6m/s | 0% | 24135m |
| 17:00 | 1.3m/s | 1.1m/s | 0% | 24134m |
| 18:00 | 0.07m/s | 0.52m/s | 0% | 24134m |
| 19:00 | 2m/s | 1.7m/s | 0% | 24134m |
| 20:00 | 2.8m/s | 3.4m/s | 0% | 24134m |
| 21:00 | 2.9m/s | 4.1m/s | 0% | 24135m |
| 22:00 | 2.7m/s | 4.8m/s | 0% | 24134m |
| 23:00 | 3.1m/s | 5.6m/s | 0% | 24135m |
| Fri, Apr 17 | ||||
| 24:00 | 3.3m/s | 5.8m/s | 0% | 24134m |
| 01:00 | 3.1m/s | 5.1m/s | 0% | 24134m |
| 02:00 | 3.3m/s | 5.7m/s | 0% | 24135m |
| 03:00 | 2.8m/s | 4.6m/s | 0% | 24135m |
| 04:00 | 2.7m/s | 3.9m/s | 0% | 24135m |
| 05:00 | 2.8m/s | 4m/s | 0% | 24135m |
| 06:00 | 2.7m/s | 4.4m/s | 0% | 24135m |
| 07:00 | 3.1m/s | 4.3m/s | 0% | 24135m |
| 08:00 | 2.9m/s | 3.3m/s | 0% | 24134m |
| 09:00 | 2.8m/s | 2.8m/s | 0% | 24134m |
| 10:00 | 2.9m/s | 3.2m/s | 0% | 24134m |
| 11:00 | 2.9m/s | 3.6m/s | 0% | 24135m |
| 12:00 | 2.9m/s | 3.9m/s | 0% | 24135m |
| 13:00 | 2.8m/s | 3.9m/s | 0% | 24134m |
| 14:00 | 3m/s | 4.3m/s | 0% | 24135m |
| 15:00 | 3m/s | 4.1m/s | 0% | 24134m |
| 16:00 | 3.4m/s | 4m/s | 0% | 24134m |
| 17:00 | 4.1m/s | 6.6m/s | 0% | 24135m |
| 18:00 | 4.4m/s | 7.8m/s | 0% | 24134m |
| 19:00 | 3.6m/s | 6.5m/s | 0% | 24134m |
| 20:00 | 2.8m/s | 4.1m/s | 0% | 24135m |
| 21:00 | 3m/s | 4.2m/s | 0% | 24135m |
| 22:00 | 3.2m/s | 4.6m/s | 7.9% | 24134m |
| 23:00 | 3.2m/s | 4.6m/s | 16% | 24135m |
| Sat, Apr 18 | ||||
| 24:00 | 3.1m/s | 3.7m/s | 24% | 24135m |
| 01:00 | 2.9m/s | 3.6m/s | 42% | 24135m |
| 02:00 | 3m/s | 3.8m/s | 61% | 24134m |
| 03:00 | 3.2m/s | 4m/s | 80% | 24135m |
| 04:00 | 3.3m/s | 5m/s | 64% | 24134m |
| 05:00 | 3.4m/s | 7.7m/s | 48% | 24135m |
| 06:00 | 3.9m/s | 9.3m/s | 32% | 18400m |
| 07:00 | 4.7m/s | 7.4m/s | 45% | 6464m |
| 08:00 | 4.5m/s | 8.7m/s | 58% | 8298m |
| 09:00 | 3m/s | 6.1m/s | 72% | 6784m |
| 10:00 | 4.2m/s | 10m/s | 76% | 24134m |
| 11:00 | 6.3m/s | 10m/s | 79% | 18613m |
| 12:00 | 4.7m/s | 7.7m/s | 83% | 24134m |
| 13:00 | 5.4m/s | 7.9m/s | 85% | 24135m |
| 14:00 | 4.2m/s | 8m/s | 88% | 24135m |
| 15:00 | 4m/s | 8.4m/s | 90% | 20085m |
| 16:00 | 3.5m/s | 7.3m/s | 79% | 21435m |
| 17:00 | 3.1m/s | 6.2m/s | 68% | 22785m |
| 18:00 | 2.6m/s | 5.1m/s | 56% | 24135m |
| 19:00 | 2.9m/s | 6.7m/s | 62% | 16199m |
| 20:00 | 3.1m/s | 8.3m/s | 67% | 8262m |
| 21:00 | 3.4m/s | 9.9m/s | 73% | 326m |
| 22:00 | 3.4m/s | 9.7m/s | 70% | 6993m |
| 23:00 | 3.4m/s | 9.4m/s | 67% | 13661m |
| Sun, Apr 19 | ||||
| 24:00 | 3.4m/s | 9.1m/s | 64% | 20328m |
| 01:00 | 3.8m/s | 8.8m/s | 66% | 17298m |
| 02:00 | 4.2m/s | 8.4m/s | 69% | 14268m |
| 03:00 | 4.7m/s | 8.1m/s | 72% | 11238m |
| 04:00 | 5m/s | 8.2m/s | 62% | 10297m |
| 05:00 | 5.2m/s | 8.4m/s | 53% | 9356m |
| 06:00 | 5.5m/s | 8.5m/s | 43% | 8415m |
| 07:00 | 5.1m/s | 8.2m/s | 42% | 7501m |
| 08:00 | 4.6m/s | 7.8m/s | 40% | 6587m |
| 09:00 | 4.2m/s | 7.4m/s | 39% | 5673m |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).
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