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Rule Fire Sky

Yufuin - Fire Sky - Kyushu

Yufu, Oita, Japan

Those rare, intensely red and orange sunset skies

Currently

Real-time conditions
Low Cloud Cover25%
Mid Cloud Cover0%
High Cloud Cover0%
Aerosol Optical Depth0.2
Sun Elevation-31.2° (Astronomical night)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
fire-sky weather icon
Next opportunity
Good Fiery Red Sky at Sunrise
Yufuin
Tomorrow · 05:00–05:48 · 1h window
Medium confidence
62%
🔥Fiery Red Sky Potential67%
Low Cloud Cover: 26%
Mid Cloud Cover: 0%
High Cloud Cover: 0%
Aerosol Optical Depth: 0.1

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks dramatic sunset and twilight conditions across Kyushu's volcanic landscapes and subtropical coasts. We analyze cloud formations, volcanic haze, atmospheric instability, and weather systems to predict when active volcanoes and ocean horizons create spectacular fire-sky photography.

Kyushu's active volcanism, subtropical weather, and coastal exposure create exceptional fire-sky conditions. Volcanic ash from Sakurajima and Mount Aso adds atmospheric particles enhancing sunset colors. Weather systems from the East China Sea and Pacific interact with volcanic peaks creating dynamic cloud formations. Coastal locations provide unobstructed ocean horizons for dramatic twilight.

What makes Kyushu fire-sky photography special:

  • Active volcano twilight - Sakurajima erupting against sunset creates silhouettes with ash plumes illuminated by fading light
  • Volcanic atmospheric enhancement - Fine volcanic ash particles scatter light creating intensified orange and red sunset conditions
  • Subtropical cloud drama - Warm humid air masses create towering cumulus formations at sunset over volcanic peaks
  • Ocean horizon fire - Unobstructed Pacific and East China Sea horizons provide dramatic sunset compositions

Sakurajima from Kagoshima waterfront provides Kyushu's most dramatic fire-sky photography—the volcano erupts multiple times daily, and evening eruptions with ash plumes backlit against sunset create extraordinary conditions. Mount Aso's caldera rim at sunset offers westward views over volcanic bowl with setting sun illuminating crater walls. Nagasaki harbor at twilight combines hillside city lights with dramatic western skies. Aoshima shrine island provides Pacific sunset with distinctive washboard rock formations. Autumn after typhoon season and winter provide reliable fire-sky conditions. Volcanic haze generally enhances rather than obscures sunset colors.

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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
Golden Hour
Any
Fiery Red Sky Potential
≥ 65.0%
Precipitation Chance
≤ 15.0%
Visibility
≥ 8000.0m
Tue, Jul 7
22:0020%55%3497m
23:0015%27%2696m
Wed, Jul 8
24:0013%0%2539m
01:004.5%13%3446m
02:002.2%26%3478m
03:005.7%39%3510m
04:0014%13%3571m
05:0028%26%5025m
06:0021%39%18572m
07:0019%53%20151m
08:0013%68%24135m
09:008.8%82%24134m
10:0017%82%24134m
11:0016%82%24135m
12:0012%82%24135m
13:0014%82%24135m
14:0015%82%24134m
15:005.7%82%24135m
16:0017%66%24134m
17:005.7%33%24135m
18:000.6%0%24134m
19:0011%0%24134m
20:0037%0%24134m
21:000%0%24134m
22:000%0%17714m
23:000.5%0%8014m
Thu, Jul 9
24:0017%0%3811m
01:0017%0%10340m
02:0017%0%10697m
03:0017%0%11540m
04:0014%0%24134m
05:0067%0%24134m
06:0013%0%24135m
07:0011%0%24134m
08:0017%0%24134m
09:0017%0%24135m
10:0014%0%24135m
11:008.6%0%24135m
12:009.4%0%24134m
13:007%13%24134m
14:0017%26%24134m
15:005.3%39%24135m
16:000.4%39%24135m
17:003.2%39%24134m
18:001%39%24135m
19:008.1%53%24134m
20:0022%68%24135m
21:001.5%82%24135m
22:0013%68%24134m
23:0016%53%24135m
Fri, Jul 10
24:0019%39%24135m
01:0022%58%24134m
02:0023%76%24135m
03:0015%95%24135m
04:0012%90%24134m
05:0011%86%24135m
06:004.3%82%24135m
07:0017%82%24135m
08:0019%82%24135m
09:005.5%82%24135m
10:008.5%67%24135m
11:0022%53%24135m
12:0022%39%24134m
13:0021%38%24135m
14:0017%38%24134m
15:0020%38%24135m
16:0014%44%24134m
17:0022%50%24134m
18:0030%56%24135m
19:0032%56%24134m
20:0038%56%24134m
21:0028%56%24134m
22:0028%56%18181m
23:0028%56%7149m
Sat, Jul 11
24:0027%56%4183m
01:0027%65%3695m
02:0021%74%3723m
03:0024%83%3589m
04:000%83%9727m
05:0012%83%15865m
06:000%83%22003m
07:000%78%22714m
08:000%74%23424m
09:000%69%24135m
10:000%57%24135m
11:000%44%24135m
12:000%32%24135m
13:000%31%24135m
14:000%31%24135m
15:000%30%24135m
16:000%53%24135m
17:000%77%24135m
18:000%100%24135m
19:002.9%77%24135m
20:0010%54%24135m
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fiery Red Sky Potential 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
Aerosol Optical Depth (550nm)
Clear Sky Probability (Ensemble)
%
Cloud Cover Uncertainty (Ensemble)
%
Dust AOD (550nm)
Golden Hour
High Clouds
%
Low Clouds
%
Mid-Level Clouds
%
RH @ 700 hPa
%
Smoke AOD (550nm)
Solar Elevation
°
Sunshine Duration
seconds
Wed, Jul 8 Sunrise 05:12 Sunset 19:26
23:00
0.16 5% 18% 0.002 - 0% 25% 0% 31% 0.03 -31° 0seconds
Thu, Jul 9 Sunrise 05:12 Sunset 19:26
24:00
0.14 6% 19% 0.002 - 0% 32% 0% 31% 0.03 -34° 0seconds
01:00
0.13 5% 17% 0.002 - 0% 31% 0% 31% 0.03 -34° 0seconds
02:00
0.12 5% 15% 0.002 - 0% 28% 0% 31% 0.03 -29° 0seconds
03:00
0.12 4% 13% 0.003 - 0% 27% 0% 32% 0.03 -23° 0seconds
04:00
0.12 13% 14% 0.003 - 0% 28% 0% 31% 0.03 -14° 0seconds
05:00
0.12 23% 14% 0.003 - 0% 26% 0% 30% 0.03 -3° 0seconds
06:00
0.11 32% 15% 0.003 - 0% 25% 0% 30% 0.03 8.3° 0seconds
07:00
0.11 31% 14% 0.003 - 0% 18% 0% 30% 0.03 20° 0seconds
08:00
0.11 29% 12% 0.003 - 0% 35% 0% 30% 0.03 32° 0seconds
09:00
0.11 28% 11% 0.004 - 0% 41% 0% 31% 0.03 45° 3600seconds
10:00
0.12 34% 13% 0.004 - 0% 28% 0% 33% 0.03 57° 3600seconds
11:00
0.13 40% 16% 0.003 - 0% 15% 0% 35% 0.03 69° 3600seconds
12:00
0.14 46% 18% 0.003 - 0% 10% 0% 37% 0.03 78° 3600seconds
13:00
0.16 55% 16% 0.003 - 0% 9% 0% 41% 0.03 76° 3600seconds
14:00
0.17 64% 15% 0.002 - 0% 13% 0% 46% 0.02 65° 3600seconds
15:00
0.17 73% 13% 0.002 - 0% 9% 0% 51% 0.02 53° 3600seconds
16:00
0.16 74% 13% 0.002 - 0% 1% 0% 47% 0.02 41° 3600seconds
17:00
0.16 75% 12% 0.002 - 0% 0% 0% 43% 0.02 28° 3600seconds
18:00
0.17 76% 12% 0.002 - 0% 1% 0% 39% 0.02 16° 3600seconds
19:00
0.2 66% 12% 0.002 - 0% 24% 0% 39% 0.02 4.4° 3600seconds
20:00
0.2 57% 13% 0.002 - 0% 46% 0% 39% 0.01 -6.8° 3600seconds
21:00
0.2 47% 13% 0.002 - 0% 44% 0% 38% 0.01 -17° 3600seconds
22:00
0.19 32% 15% 0.002 - 0% 24% 0% 40% 0.01 -25° 0seconds
23:00
0.19 18% 16% 0.002 - 3% 14% 0% 42% 0.01 -31° 0seconds
Fri, Jul 10 Sunrise 05:12 Sunset 19:26
24:00
0.19 3% 18% 0.002 - 4% 27% 0% 45% 0.01 -34° 0seconds
01:00
0.17 3% 18% 0.002 - 3% 41% 0% 43% 0.01 -34° 0seconds
02:00
0.12 2% 17% 0.002 - 0% 63% 0% 41% 0.01 -30° 0seconds
03:00
0.1 2% 17% 0.003 - 17% 73% 0% 39% 0.01 -23° 0seconds
04:00
0.09 2% 17% 0.004 - 4% 72% 0% 40% 0.009 -14° 0seconds
05:00
0.09 2% 18% 0.004 - 0% 72% 0% 41% 0.009 -3.1° 0seconds
06:00
0.08 2% 18% 0.005 - 2% 72% 0% 41% 0.009 8.2° 0seconds
07:00
0.08 2% 17% 0.005 - 1% 70% 0% 48% 0.01 20° 0seconds
08:00
0.08 1% 17% 0.005 - 0% 57% 0% 55% 0.01 32° 0seconds
09:00
0.09 1% 16% 0.004 - 5% 68% 0% 61% 0.01 45° 0seconds
10:00
- 1% 16% - - 6% 63% 0% 60% - 57° 3600seconds
11:00
- 1% 15% - - 4% 35% 0% 59% - 69° 3600seconds
12:00
- 1% 15% - - 0% 41% 0% 57% - 78° 3600seconds
13:00
- 1% 15% - - 0% 67% 0% 60% - 76° 3600seconds
14:00
- 2% 16% - - 2% 62% 0% 62% - 65° 3600seconds
15:00
- 2% 16% - - 5% 14% 1% 64% - 53° 3600seconds
16:00
- 9% 21% - - 6% 51% 4% 63% - 41° 3600seconds
17:00
- 17% 25% - - 32% 9% 3% 63% - 28° 3600seconds
18:00
- 24% 30% - - 100% 11% 1% 62% - 16° 3600seconds
19:00
- 20% 29% - - 100% 1% 0% 62% - 4.3° 3600seconds
20:00
- 17% 28% - - 100% 2% 0% 62% - -6.9° 3600seconds
21:00
- 13% 27% - - 100% 8% 0% 62% - -17° 3600seconds
22:00
- 9% 23% - - 100% 14% 0% 64% - -25° 0seconds
23:00
- 5% 19% - - 100% 16% 0% 67% - -31° 0seconds
Sat, Jul 11 Sunrise 05:13 Sunset 19:26
24:00
- 1% 15% - - 100% 21% 4% 69% - -34° 0seconds
01:00
- 1% 13% - - 100% 32% 35% 65% - -34° 0seconds
02:00
- 0% 11% - - 100% 35% 100% 61% - -30° 0seconds
03:00
- 0% 9% - - 100% 43% 75% 57% - -23° 0seconds
04:00
- 0% 9% - - 67% 44% 52% 56% - -14° 1200seconds
05:00
- 0% 9% - - 33% 45% 28% 56% - -3.3° 2400seconds
06:00
- 0% 9% - - 0% 46% 5% 56% - 8.1° 3600seconds
07:00
- 0% 9% - - 0% 37% 19% 54% - 20° 3600seconds
08:00
- 0% 8% - - 0% 28% 32% 53% - 32° 3600seconds
09:00
- 0% 8% - - 0% 19% 46% 51% - 45° 3600seconds
10:00
- 2% 14% - - 0% 16% 51% 52% - 57° 3600seconds
11:00
- 5% 19% - - 0% 12% 56% 52% - 69° 3600seconds
12:00
- 7% 25% - - 0% 9% 62% 52% - 78° 3600seconds
13:00
- 6% 24% - - 10% 8% 43% 53% - 76° 3600seconds
14:00
- 5% 22% - - 21% 8% 24% 53% - 65° 3600seconds
15:00
- 4% 21% - - 31% 7% 6% 54% - 53° 3600seconds
16:00
- 6% 23% - - 54% 8% 5% 50% - 41° 2400seconds
17:00
- 7% 25% - - 77% 8% 5% 46% - 28° 1200seconds
18:00
- 9% 27% - - 100% 9% 4% 42% - 16° 0seconds
19:00
- 8% 26% - - 86% 7% 5% 42% - 4.3° 0seconds
20:00
- 7% 25% - - 72% 4% 5% 42% - -7° 0seconds
21:00
- 6% 24% - - 57% 2% 5% 42% - -17° 0seconds
22:00
- 5% 22% - - 71% 1% 5% 42% - -25° 0seconds
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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