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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 Depth0.1dimensionless
Sun Elevation-36.3° (Astronomical night)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Santiago
fire-sky weather icon
Next opportunity
Excellent Fiery Red Sky at Sunrise
San Pedro de Atacama
Mon, Apr 13 · 07:00–07:14 · 1h window
Medium confidence
49%
🔥Fiery Red Sky Potential80.8%
Low Cloud Cover: 0%
Mid Cloud Cover: 0%
High Cloud Cover: 67%
Sun Elevation: 2.8° (Golden hour)
fire-sky weather icon
Excellent Fiery Red Sky at Sunrise
San Pedro de Atacama
Tue, Apr 14 · 07:00–07:15
🔥Fiery Red Sky Potential:81%
Medium
fire-sky weather icon
Spectacular Fiery Red Sky at Sunrise
San Pedro de Atacama
Wed, Apr 15 · 07:00–07:15
🔥Fiery Red Sky Potential:93.4%
Medium
fire-sky weather icon
Excellent Fiery Red Sky at Sunset
San Pedro de Atacama
Fri, Apr 17 · 18:00–18:31
🔥Fiery Red Sky Potential:73.3%
Medium

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
0matching hours in the next 92 hours
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
Wed, Apr 8
24:000%0%24134m
01:000%0%24134m
02:000%0%24135m
03:000%0%24135m
04:000%0%24134m
05:000%0%24135m
06:000%0%24134m
07:000%0%24135m
08:000%0%24134m
09:000%0%24134m
10:000%0%24134m
11:000%0%24135m
12:000%0%24135m
13:000%0%24134m
14:000%0%24135m
15:000%0%24135m
16:000%0%24134m
17:000%0%24134m
18:000%0%24135m
19:001.7%0%24135m
20:000%0%24135m
21:000%0%24134m
22:000%0%24135m
23:000%0%24135m
Thu, Apr 9
24:000%0%24135m
01:000%0%24134m
02:000%0%24134m
03:000%0%24134m
04:000%0%24135m
05:000%0%24134m
06:000%0%24135m
07:0056%0%24135m
08:000%0%24135m
09:000%0%24135m
10:000%0%24134m
11:000%0%24135m
12:000%0%24134m
13:000%0%24134m
14:000%0%24135m
15:000%0%24135m
16:000%0%24134m
17:000%0%24134m
18:000%0%24135m
19:001.4%0%24134m
20:000%0%24135m
21:000%0%24134m
22:000%0%24134m
23:000%0%24135m
Fri, Apr 10
24:000%0%24134m
01:000%0%24134m
02:000%0%24135m
03:000%0%24134m
04:000%0%24134m
05:000%0%24135m
06:000%0%24135m
07:0055%0%24134m
08:000%0%24134m
09:000%0%24134m
10:000%0%24134m
11:000%0%24134m
12:000%0%24134m
13:000%0%24135m
14:000%0%24135m
15:000%0%24135m
16:000%0%24134m
17:000%0%24135m
18:000%0%24134m
19:004.6%0%24135m
20:000%0%24134m
21:000%0%24134m
22:000%0%24134m
23:000%0%24135m
Sat, Apr 11
24:000%0%24135m
01:000%0%24135m
02:000%0%24135m
03:000%0%24135m
04:000%0%24135m
05:000%0%24135m
06:000%0%24135m
07:0013%0%24135m
08:000%0%24135m
09:000%0%24135m
10:000%0%24135m
11:000%0%24135m
12:000%0%24135m
13:000%0%24135m
14:000%0%24135m
15:000%0%24135m
16:000%0%24135m
17:000%0%24135m
18:000%0%24135m
19:000.3%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
Wed, Apr 8 Sunrise 06:43 Sunset 18:24
21:00
0.06 72% 21% 0.01 - 0% 0% 0% 24% 0.007 -36° 0seconds
22:00
0.06 78% 21% 0.01 - 4% 0% 0% 26% 0.008 -50° 0seconds
23:00
0.06 84% 21% 0.01 - 3% 0% 0% 27% 0.008 -63° 0seconds
Thu, Apr 9 Sunrise 06:43 Sunset 18:24
24:00
0.06 74% 23% 0.01 - 48% 0% 0% 28% 0.008 -73° 0seconds
01:00
0.06 65% 24% 0.01 - 100% 0% 0% 29% 0.008 -73° 0seconds
02:00
0.06 55% 26% 0.009 - 2% 0% 0% 30% 0.007 -64° 0seconds
03:00
0.06 48% 27% 0.008 - 5% 0% 0% 30% 0.007 -52° 0seconds
04:00
0.05 42% 29% 0.008 - 34% 0% 0% 29% 0.007 -38° 0seconds
05:00
0.05 35% 30% 0.007 - 100% 0% 0% 28% 0.007 -25° 0seconds
06:00
0.06 32% 28% 0.007 - 91% 0% 0% 27% 0.007 -11° 0seconds
07:00
0.06 28% 25% 0.006 - 100% 0% 0% 26% 0.007 3.1° 0seconds
08:00
0.06 25% 23% 0.006 - 100% 0% 0% 25% 0.007 16° 0seconds
09:00
0.06 29% 26% 0.005 - 95% 0% 0% 24% 0.007 29° 3600seconds
10:00
0.06 32% 28% 0.005 - 57% 0% 0% 23% 0.007 41° 3600seconds
11:00
0.06 36% 31% 0.004 - 43% 0% 0% 22% 0.007 52° 3600seconds
12:00
0.06 32% 29% 0.003 - 86% 0% 0% 21% 0.007 58° 3600seconds
13:00
0.06 28% 28% 0.003 - 100% 0% 0% 20% 0.007 59° 3600seconds
14:00
0.06 24% 26% 0.003 - 5% 0% 0% 19% 0.008 53° 3600seconds
15:00
0.06 40% 25% 0.005 - 82% 0% 0% 18% 0.007 43° 3600seconds
16:00
0.06 55% 25% 0.006 - 100% 0% 0% 17% 0.007 31° 3600seconds
17:00
0.06 71% 24% 0.007 - 15% 0% 0% 16% 0.007 18° 3600seconds
18:00
0.06 76% 21% 0.008 - 3% 0% 0% 18% 0.007 4.9° 3600seconds
19:00
0.06 82% 17% 0.007 - 3% 0% 0% 21% 0.007 -8.9° 3600seconds
20:00
0.05 87% 14% 0.007 - 0% 0% 0% 23% 0.007 -23° 3600seconds
21:00
0.05 89% 14% 0.006 - 2% 0% 0% 22% 0.007 -37° 0seconds
22:00
0.05 92% 13% 0.006 - 15% 0% 0% 22% 0.007 -50° 0seconds
23:00
0.05 94% 13% 0.005 - 22% 0% 0% 21% 0.007 -63° 0seconds
Fri, Apr 10 Sunrise 06:44 Sunset 18:23
24:00
0.05 88% 15% 0.004 - 100% 0% 0% 22% 0.007 -73° 0seconds
01:00
0.05 83% 18% 0.003 - 92% 0% 0% 22% 0.007 -74° 0seconds
02:00
0.05 77% 20% 0.003 - 100% 0% 0% 22% 0.007 -65° 0seconds
03:00
0.05 62% 25% 0.003 - 100% 0% 0% 23% 0.007 -52° 0seconds
04:00
0.05 48% 31% 0.002 - 100% 0% 0% 23% 0.007 -38° 0seconds
05:00
0.05 33% 36% 0.002 - 100% 0% 0% 24% 0.008 -25° 0seconds
06:00
0.04 27% 32% 0.002 - 100% 0% 0% 24% 0.008 -11° 0seconds
07:00
0.04 22% 29% 0.002 - 100% 0% 0% 24% 0.008 0seconds
08:00
0.04 16% 25% 0.002 - 100% 0% 0% 23% 0.007 16° 0seconds
09:00
- 20% 27% - - 100% 0% 0% 22% - 29° 3600seconds
10:00
- 24% 30% - - 98% 0% 0% 22% - 41° 3600seconds
11:00
- 28% 32% - - 100% 0% 0% 21% - 51° 3600seconds
12:00
- 30% 31% - - 100% 0% 0% 19% - 58° 3600seconds
13:00
- 31% 31% - - 100% 0% 0% 18% - 58° 3600seconds
14:00
- 33% 30% - - 17% 0% 0% 16% - 52° 3600seconds
15:00
- 45% 28% - - 5% 0% 0% 17% - 43° 3600seconds
16:00
- 57% 26% - - 100% 0% 0% 17% - 31° 3600seconds
17:00
- 69% 24% - - 100% 0% 0% 18% - 18° 3600seconds
18:00
- 72% 23% - - 95% 0% 0% 21% - 4.7° 3600seconds
19:00
- 74% 22% - - 100% 0% 0% 24% - -9.1° 3600seconds
20:00
- 77% 21% - - 69% 0% 0% 27% - -23° 3600seconds
21:00
- 82% 20% - - 2% 0% 0% 28% - -37° 0seconds
22:00
- 86% 20% - - 2% 0% 0% 28% - -50° 0seconds
23:00
- 91% 19% - - 3% 0% 0% 29% - -63° 0seconds
Sat, Apr 11 Sunrise 06:44 Sunset 18:22
24:00
- 92% 17% - - 7% 0% 0% 29% - -73° 0seconds
01:00
- 92% 15% - - 11% 0% 0% 28% - -74° 0seconds
02:00
- 93% 13% - - 5% 0% 0% 28% - -65° 0seconds
03:00
- 92% 15% - - 3% 0% 0% 28% - -52° 1200seconds
04:00
- 92% 16% - - 2% 0% 0% 27% - -39° 2400seconds
05:00
- 91% 18% - - 0% 0% 0% 27% - -25° 3600seconds
06:00
- 92% 17% - - 0% 0% 0% 26% - -11° 3600seconds
07:00
- 93% 15% - - 0% 0% 0% 26% - 2.9° 3600seconds
08:00
- 94% 14% - - 0% 0% 0% 25% - 16° 3600seconds
09:00
- 95% 12% - - 0% 0% 0% 24% - 29° 3600seconds
10:00
- 97% 9% - - 0% 0% 0% 23% - 41° 3600seconds
11:00
- 98% 7% - - 0% 0% 0% 22% - 51° 3600seconds
12:00
- 97% 9% - - 0% 0% 0% 21% - 58° 3600seconds
13:00
- 96% 10% - - 0% 0% 0% 20% - 58° 3600seconds
14:00
- 95% 12% - - 0% 0% 0% 18% - 52° 3600seconds
15:00
- 96% 11% - - 0% 0% 0% 18% - 42° 2400seconds
16:00
- 97% 9% - - 0% 0% 0% 18% - 31° 1200seconds
17:00
- 98% 8% - - 0% 0% 0% 18% - 18° 0seconds
18:00
- 97% 10% - - 0% 0% 0% 22% - 4.5° 0seconds
19:00
- 97% 11% - - 0% 0% 0% 26% - -9.3° 0seconds
20:00
- 96% 13% - - 0% 0% 0% 30% - -23° 0seconds
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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