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Rule Fire Sky

San Pedro de Atacama - Fire Sky - Atacama Desert

San Pedro de Atacama, Antofagasta, Chile

Those rare, intensely red and orange sunset skies

Currently

Real-time conditions
Low Cloud Cover0%
Mid Cloud Cover0%
High Cloud Cover0%
Aerosol Optical Depth0.0
Sun Elevation-41.0° (Astronomical night)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Santiago
fire-sky weather icon
Next opportunity
Spectacular Fiery Red Sky at Sunset
San Pedro de Atacama
Today · 18:00–18:13 · 1h window
High confidence
77%
🔥Fiery Red Sky Potential99.6%
Low Cloud Cover: 0%
Mid Cloud Cover: 84%
High Cloud Cover: 100%
Aerosol Optical Depth: 0.0

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the spectacular sunset conditions that transform the Atacama Desert into a photographer's dream. We combine cloud coverage patterns, atmospheric clarity, and visibility data to predict when the sky will ignite with dramatic color.

The Atacama's near-zero humidity creates sunsets of exceptional purity—no moisture means no atmospheric diffusion, allowing colors to reach extraordinary saturation. The high altitude and crystal-clear air mean the sun's rays travel through minimal atmosphere, producing fierce oranges and reds that reflect off the desert's unique features.

What makes Atacama special for fire-sky photography:

  • Zero humidity advantage - The world's driest desert produces pure, undiffused sunset colors
  • Reflective salt flats - Salar de Atacama's 3,000 square kilometers mirror sunset colors
  • Volcanic backdrops - Snow-capped peaks catch alpenglow while valleys glow with reflected light
  • Flamingo lagoons - Pink flamingos feeding in sunset-lit saline lagoons create surreal compositions

The massive Salar de Atacama becomes a natural mirror during and after rare rain events, reflecting fire skies with perfect clarity. Even dry, the white salt crystals amplify sunset colors. The Lagunas Altiplanicas—Miscanti and Miñiques—at 4,200m elevation offer high-altitude sunset reflections with volcanic peaks silhouetted against blazing skies. The region's minimal particulate matter means color transitions are sharp and defined rather than hazy, creating dramatic contrast between burning horizons and deep blue zenith.

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72-hour requirements breakdown

What passed or failed, hour by hour
1matching hours in the next 75 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Santiago
Golden Hour
Any
Fiery Red Sky Potential
≥ 65.0%
Precipitation Chance
≤ 15.0%
Visibility
≥ 8000.0m
Mon, May 18
24:004.7%0%24135m
01:004.7%0%24134m
02:004.7%0%24135m
03:004.7%0%24135m
04:004.7%0%24134m
05:004.7%0%24135m
06:004.7%0%24134m
07:0031%0%24135m
08:004.7%0%24134m
09:004.9%0%24134m
10:005.1%0%24135m
11:005.2%0%24134m
12:006.4%0%24134m
13:007.1%0%24134m
14:005.1%0%24134m
15:008.1%0%24135m
16:0030%0%24134m
17:0029%0%24134m
18:00100%0%24135m
19:0028%0%24134m
20:0028%0%24135m
21:0025%0%24135m
22:0024%0%24134m
23:0027%0%24135m
Tue, May 19
24:0030%0%24134m
01:0010%0%24135m
02:007.8%0%24135m
03:0013%0%24134m
04:0018%0%24134m
05:0013%0%24135m
06:006.9%0%24134m
07:0031%0%24135m
08:004.8%0%24135m
09:004.7%0%24134m
10:004.7%0%24134m
11:004.7%0%24134m
12:004.7%0%24135m
13:004.7%0%24134m
14:004.7%0%24134m
15:004.7%0%24134m
16:004.7%0%24135m
17:004.7%0%24135m
18:0039%0%24135m
19:004.7%0%24134m
20:005.1%0%24135m
21:004.7%0%24134m
22:004.7%0%24134m
23:005.5%0%24135m
Wed, May 20
24:004.8%0%24134m
01:004.7%0%24135m
02:004.7%0%24134m
03:005.7%0%24134m
04:004.8%0%24134m
05:005.5%0%24135m
06:004.8%0%24135m
07:0030%0%24135m
08:006.2%0%24135m
09:005.6%0%24135m
10:005.8%0%24135m
11:006.5%0%24135m
12:0029%0%24135m
13:0029%0%24135m
14:0024%0%24135m
15:000%0%24135m
16:000%0%24135m
17:000%0%24135m
18:0024%0%24135m
19:000%0%24135m
20:000%0%24135m
21:000%0%24135m
22:000%0%24135m
23:000%0%24135m
Thu, May 21
24:000%0%24135m
01:000%0%24135m
02:000%0%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
America/Santiago
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, May 18 Sunrise 07:00 Sunset 17:58
04:00
0.03 96% 4% 0.005 - 0% 0% 0% 18% 0.008 -41° 0seconds
05:00
0.03 100% 0% 0.005 - 0% 0% 0% 17% 0.007 -27° 0seconds
06:00
0.03 100% 0% 0.005 - 0% 0% 0% 16% 0.007 -14° 0seconds
07:00
0.03 100% 0% 0.004 - 0% 0% 0% 15% 0.007 -0.44° 0seconds
08:00
0.03 100% 0% 0.004 - 0% 0% 0% 14% 0.007 12° 0seconds
09:00
0.03 100% 0% 0.003 - 0% 0% 0% 13% 0.007 24° 3600seconds
10:00
0.03 100% 0% 0.003 - 1% 0% 0% 13% 0.007 34° 3600seconds
11:00
0.03 100% 0% 0.003 - 5% 0% 0% 13% 0.007 42° 3600seconds
12:00
0.03 99% 3% 0.002 - 51% 0% 0% 12% 0.007 47° 3600seconds
13:00
0.03 98% 6% 0.002 - 33% 0% 0% 11% 0.007 47° 3600seconds
14:00
0.03 97% 9% 0.003 - 2% 0% 0% 9.7% 0.007 42° 3600seconds
15:00
0.03 91% 15% 0.005 - 5% 0% 0% 9.9% 0.008 34° 3600seconds
16:00
0.03 84% 20% 0.007 - 15% 0% 0% 10% 0.008 23° 3600seconds
17:00
0.04 78% 26% 0.009 - 85% 0% 5% 10% 0.008 12° 3600seconds
18:00
0.04 73% 26% 0.01 - 98% 0% 51% 12% 0.008 -0.92° 3600seconds
19:00
0.04 68% 25% 0.01 - 96% 0% 23% 14% 0.007 -14° 3600seconds
20:00
0.04 63% 25% 0.009 - 87% 0% 10% 16% 0.007 -28° 3600seconds
21:00
- 68% 22% - - 73% 0% 25% 16% - -41° 0seconds
22:00
- 72% 20% - - 54% 0% 38% 16% - -55° 0seconds
23:00
- 77% 17% - - 35% 0% 39% 16% - -69° 0seconds
Tue, May 19 Sunrise 07:00 Sunset 17:57
24:00
- 77% 17% - - 26% 0% 39% 15% - -82° 0seconds
01:00
- 76% 17% - - 36% 0% 57% 15% - -82° 0seconds
02:00
- 76% 17% - - 2% 0% 41% 14% - -69° 0seconds
03:00
- 73% 24% - - 2% 0% 16% 14% - -55° 0seconds
04:00
- 70% 30% - - 0% 0% 23% 13% - -41° 0seconds
05:00
- 67% 37% - - 1% 0% 5% 13% - -27° 0seconds
06:00
- 70% 34% - - 0% 0% 5% 12% - -14° 0seconds
07:00
- 73% 30% - - 0% 0% 1% 11% - -0.58° 0seconds
08:00
- 76% 27% - - 0% 0% 0% 10% - 12° 0seconds
09:00
- 84% 19% - - 0% 0% 0% 10% - 23° 3600seconds
10:00
- 92% 11% - - 0% 0% 0% 10% - 34° 3600seconds
11:00
- 100% 3% - - 0% 0% 0% 10% - 42° 3600seconds
12:00
- 100% 2% - - 0% 0% 0% 9.4% - 47° 3600seconds
13:00
- 100% 2% - - 0% 0% 0% 8.8% - 47° 3600seconds
14:00
- 100% 1% - - 0% 0% 0% 8.2% - 42° 3600seconds
15:00
- 100% 1% - - 0% 0% 0% 8.3% - 34° 3600seconds
16:00
- 100% 0% - - 0% 0% 0% 8.5% - 23° 3600seconds
17:00
- 100% 0% - - 0% 0% 0% 8.6% - 11° 3600seconds
18:00
- 100% 0% - - 0% 0% 2% 11% - -1° 3600seconds
19:00
- 100% 0% - - 0% 0% 0% 13% - -14° 3600seconds
20:00
- 100% 0% - - 0% 0% 1% 15% - -28° 3600seconds
21:00
- 100% 0% - - 0% 0% 0% 15% - -41° 0seconds
22:00
- 100% 0% - - 0% 0% 0% 14% - -55° 0seconds
23:00
- 100% 0% - - 0% 0% 0% 14% - -69° 0seconds
Wed, May 20 Sunrise 07:01 Sunset 17:57
24:00
- 100% 0% - - 0% 0% 0% 14% - -83° 0seconds
01:00
- 100% 0% - - 0% 0% 0% 14% - -82° 0seconds
02:00
- 100% 0% - - 0% 0% 0% 14% - -69° 0seconds
03:00
- 100% 0% - - 2% 0% 0% 13% - -55° 0seconds
04:00
- 100% 0% - - 0% 0% 0% 13% - -41° 0seconds
05:00
- 100% 0% - - 1% 0% 0% 12% - -28° 0seconds
06:00
- 100% 0% - - 0% 0% 0% 12% - -14° 0seconds
07:00
- 100% 1% - - 4% 0% 0% 11% - -0.71° 0seconds
08:00
- 100% 1% - - 1% 0% 0% 10% - 12° 0seconds
09:00
- 100% 2% - - 4% 0% 0% 10% - 23° 3600seconds
10:00
- 100% 2% - - 0% 0% 0% 9.6% - 34° 3600seconds
11:00
- 100% 3% - - 0% 0% 0% 9.2% - 42° 3600seconds
12:00
- 99% 6% - - 8% 0% 0% 8.7% - 46° 3600seconds
13:00
- 97% 8% - - 3% 0% 0% 8.2% - 46° 3600seconds
14:00
- 96% 11% - - 5% 0% 0% 7.7% - 42° 3600seconds
15:00
- 88% 17% - - 10% 0% 0% 8.2% - 33° 2400seconds
16:00
- 80% 23% - - 15% 0% 0% 8.8% - 23° 1200seconds
17:00
- 72% 29% - - 20% 0% 0% 9.3% - 11° 0seconds
18:00
- 68% 30% - - 13% 0% 0% 11% - -1.1° 0seconds
19:00
- 64% 31% - - 7% 0% 0% 12% - -14° 0seconds
20:00
- 60% 32% - - 0% 0% 0% 13% - -28° 0seconds
21:00
- 61% 33% - - 0% 0% 0% 13% - -41° 0seconds
22:00
- 63% 33% - - 0% 0% 0% 13% - -55° 0seconds
23:00
- 64% 34% - - 0% 0% 0% 13% - -69° 0seconds
Thu, May 21 Sunrise 07:01 Sunset 17:57
24:00
- 67% 31% - - 6% 0% 0% 13% - -83° 0seconds
01:00
- 71% 29% - - 12% 0% 1% 13% - -82° 0seconds
02:00
- 74% 26% - - 17% 0% 1% 14% - -69° 0seconds
03:00
- 80% 22% - - 18% 0% 1% 14% - -55° 1200seconds
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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