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Rule Fire Sky

Beppu - Fire Sky - Kyushu

Beppu, Oita, Japan

Those rare, intensely red and orange sunset skies

Currently

Real-time conditions
Low Cloud Cover88%
Mid Cloud Cover0%
High Cloud Cover0%
Aerosol Optical Depth0.3dimensionless
Sun Elevation21.5° (Daylight)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
fire-sky weather icon
Next opportunity
Excellent Fiery Red Sky at Sunset
Beppu
Tomorrow · 19:00–19:04 · 1h window
Medium confidence
59%
🔥Fiery Red Sky Potential74.7%
Low Cloud Cover: 0%
Mid Cloud Cover: 0%
High Cloud Cover: 21%
Aerosol Optical Depth: 0.2dimensionless

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
Sun, Apr 19
17:001.4%68%382m
18:0017%56%243m
19:0015%63%172m
20:007.3%70%153m
21:009.2%77%158m
22:006.8%87%17056m
23:001.4%82%7600m
Mon, Apr 20
24:0018%77%11081m
01:0019%77%4494m
02:0017%78%4719m
03:0017%79%10481m
04:0011%31%24135m
05:0011%35%24135m
06:008.5%39%24135m
07:0012%50%16859m
08:0017%62%24135m
09:000%74%5521m
10:002.2%92%3700m
11:000.1%94%10767m
12:0014%96%24134m
13:003%97%24135m
14:002.2%98%24135m
15:0012%99%24134m
16:000.9%90%22263m
17:002.4%81%18299m
18:000.9%72%23645m
19:0014%80%24135m
20:001%87%18047m
21:0013%95%24135m
22:008.1%76%24134m
23:0020%58%24135m
Tue, Apr 21
24:0014%39%24134m
01:0021%39%17121m
02:0014%39%23122m
03:0026%39%17101m
04:0030%26%18252m
05:0017%13%24134m
06:0033%0%24135m
07:0012%0%24135m
08:0013%0%24134m
09:0025%0%24134m
10:0026%0%24135m
11:0031%0%24134m
12:0031%0%24135m
13:0031%0%24135m
14:0031%0%24134m
15:0033%0%24134m
16:0031%0%24135m
17:0032%0%24134m
18:0030%0%24135m
19:0075%0%24134m
20:0029%0%24134m
21:0029%0%24134m
22:0029%0%24134m
23:0029%0%24135m
Wed, Apr 22
24:0029%0%24134m
01:0029%0%24134m
02:0032%0%24134m
03:0032%0%24134m
04:0029%0%24134m
05:0037%0%24135m
06:0039%0%24135m
07:0032%17%24135m
08:0014%33%24134m
09:0012%50%24135m
10:0013%43%24135m
11:0013%37%24135m
12:0011%30%24134m
13:0013%39%24135m
14:009.8%47%24135m
15:0010%55%24134m
16:0010%59%17861m
17:009.6%63%10448m
18:009%67%9407m
19:009.1%74%6739m
20:007.2%80%3152m
21:008.1%87%2834m
22:0010%90%1960m
23:009.6%93%1087m
Thu, Apr 23
24:0010%96%213m
01:008.9%97%231m
02:007%98%249m
03:007.7%99%266m
04:000%97%1580m
05:000%94%2895m
06:000%92%4209m
07:000%92%10710m
08:000%92%17212m
09:000%92%23714m
10:000%83%23854m
11:000%74%23995m
12:000%65%24135m
13:000%65%24135m
14:000%64%24135m
15:000%63%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
Mon, Apr 20 Sunrise 05:38 Sunset 18:47
17:00
0.34 18% 18% 0.05 - 0% 88% 0% 67% 0.02 22° 3600seconds
18:00
0.35 24% 20% 0.05 - 0% 74% 0% 72% 0.02 9.1° 3600seconds
19:00
0.38 17% 18% 0.05 - 0% 89% 0% 69% 0.03 -3.2° 0seconds
20:00
0.37 9% 16% 0.05 - 0% 86% 1% 66% 0.03 -15° 0seconds
21:00
0.3 2% 14% 0.05 - 0% 54% 0% 63% 0.02 -26° 0seconds
22:00
0.3 1% 13% 0.05 - 5% 94% 0% 67% 0.02 -35° 0seconds
23:00
0.3 1% 13% 0.05 - 6% 82% 2% 71% 0.02 -42° 0seconds
Tue, Apr 21 Sunrise 05:38 Sunset 18:47
24:00
0.28 0% 12% 0.05 - 98% 45% 0% 76% 0.02 -45° 0seconds
01:00
0.29 0% 10% 0.06 - 100% 83% 0% 68% 0.02 -44° 0seconds
02:00
0.33 0% 9% 0.08 - 100% 85% 0% 59% 0.02 -38° 0seconds
03:00
0.37 0% 7% 0.09 - 97% 50% 0% 51% 0.02 -30° 0seconds
04:00
0.43 0% 7% 0.09 - 100% 19% 0% 34% 0.03 -20° 0seconds
05:00
0.45 0% 7% 0.08 - 100% 39% 0% 18% 0.04 -8.3° 0seconds
06:00
0.38 0% 7% 0.08 - 100% 74% 12% 1.5% 0.04 0seconds
07:00
0.3 0% 7% 0.08 - 100% 0% 89% 1.5% 0.03 16° 0seconds
08:00
0.28 0% 6% 0.08 - 100% 0% 72% 1.6% 0.03 29° 0seconds
09:00
0.27 0% 6% 0.08 - 100% 0% 98% 1.6% 0.03 41° 0seconds
10:00
0.26 1% 10% 0.07 - 100% 0% 0% 1.7% 0.03 53° 3600seconds
11:00
0.25 1% 14% 0.06 - 100% 0% 0% 1.9% 0.03 63° 3600seconds
12:00
0.22 2% 18% 0.06 - 100% 0% 0% 2% 0.02 68° 3600seconds
13:00
0.2 3% 19% 0.06 - 100% 0% 0% 2.2% 0.02 66° 3600seconds
14:00
0.19 3% 21% 0.06 - 100% 0% 0% 2.3% 0.02 57° 3600seconds
15:00
0.19 4% 22% 0.06 - 100% 0% 0% 2.5% 0.02 46° 3600seconds
16:00
0.17 11% 28% 0.06 - 100% 0% 0% 2.3% 0.02 34° 3600seconds
17:00
0.16 18% 33% 0.06 - 100% 0% 0% 2% 0.02 22° 3600seconds
18:00
0.15 25% 39% 0.05 - 65% 0% 0% 1.8% 0.02 9.2° 3600seconds
19:00
0.16 23% 37% 0.04 - 21% 0% 0% 1.8% 0.02 -3° 3600seconds
20:00
0.17 20% 35% 0.04 - 13% 0% 0% 1.9% 0.02 -15° 3600seconds
21:00
0.17 18% 33% 0.04 - 100% 0% 0% 1.9% 0.02 -26° 3600seconds
22:00
- 14% 30% - - 100% 0% 1% 1.9% - -35° 0seconds
23:00
- 11% 28% - - 100% 0% 4% 1.9% - -42° 0seconds
Wed, Apr 22 Sunrise 05:37 Sunset 18:48
24:00
- 7% 25% - - 100% 0% 3% 1.9% - -45° 0seconds
01:00
- 5% 23% - - 53% 0% 8% 1.9% - -43° 0seconds
02:00
- 4% 20% - - 44% 0% 1% 2% - -38° 0seconds
03:00
- 2% 18% - - 29% 0% 14% 2% - -30° 0seconds
04:00
- 4% 21% - - 7% 0% 5% 2% - -19° 0seconds
05:00
- 6% 23% - - 86% 0% 5% 2.1% - -8° 0seconds
06:00
- 8% 26% - - 100% 0% 5% 2.1% - 4.2° 0seconds
07:00
- 6% 24% - - 91% 0% 5% 2.8% - 16° 0seconds
08:00
- 4% 21% - - 97% 0% 5% 3.4% - 29° 0seconds
09:00
- 2% 19% - - 13% 0% 83% 4.1% - 41° 0seconds
10:00
- 2% 18% - - 81% 0% 98% 12% - 53° 3600seconds
11:00
- 1% 16% - - 71% 0% 100% 19% - 63° 3600seconds
12:00
- 1% 15% - - 62% 27% 100% 27% - 69° 3600seconds
13:00
- 1% 13% - - 6% 61% 100% 51% - 66° 3600seconds
14:00
- 0% 12% - - 100% 100% 100% 74% - 58° 3600seconds
15:00
- 0% 10% - - 100% 100% 100% 98% - 46° 3600seconds
16:00
- 0% 7% - - 100% 100% 100% 99% - 34° 0seconds
17:00
- 0% 5% - - 100% 100% 100% 99% - 22° 0seconds
18:00
- 0% 2% - - 100% 100% 100% 99% - 9.4° 0seconds
19:00
- 0% 3% - - 100% 100% 100% 99% - -2.8° 0seconds
20:00
- 0% 4% - - 100% 100% 100% 100% - -15° 0seconds
21:00
- 0% 5% - - 100% 100% 100% 100% - -25° 0seconds
22:00
- 0% 3% - - 100% 100% 100% 100% - -35° 0seconds
23:00
- 0% 2% - - 100% 100% 100% 99% - -41° 0seconds
Thu, Apr 23 Sunrise 05:36 Sunset 18:49
24:00
- 0% 0% - - 100% 100% 100% 99% - -44° 0seconds
01:00
- 0% 0% - - 100% 100% 100% 99% - -43° 0seconds
02:00
- 0% 0% - - 100% 100% 100% 99% - -38° 0seconds
03:00
- 0% 0% - - 100% 100% 100% 99% - -29° 0seconds
04:00
- 0% 0% - - 70% 100% 100% 100% - -19° 0seconds
05:00
- 0% 0% - - 41% 100% 100% 100% - -7.8° 0seconds
06:00
- 0% 0% - - 11% 100% 100% 100% - 4.4° 0seconds
07:00
- 0% 0% - - 41% 100% 99% 98% - 17° 0seconds
08:00
- 0% 0% - - 70% 100% 98% 96% - 29° 0seconds
09:00
- 0% 0% - - 100% 100% 97% 94% - 42° 0seconds
10:00
- 0% 0% - - 67% 94% 80% 96% - 53° 0seconds
11:00
- 0% 0% - - 34% 88% 63% 98% - 63° 0seconds
12:00
- 0% 0% - - 1% 82% 46% 100% - 69° 0seconds
13:00
- 0% 0% - - 34% 81% 57% 99% - 67° 0seconds
14:00
- 0% 0% - - 67% 79% 69% 98% - 58° 0seconds
15:00
- 0% 0% - - 100% 77% 81% 97% - 47° 0seconds
16:00
- 0% 2% - - 100% 85% 87% 95% - 34° 0seconds
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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