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Rule Fog Hunter

Banner Elk - Fog Hunter - Smoky Mountains & Blue Ridge

Banner Elk, North Carolina, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread9.4°C
Visibility24135 (Clear)
Relative Humidity55%
Wind Speed0.5m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York
fog weather icon
Next opportunity
Dense Fog at Sunrise
Banner Elk
Fri, May 22 · 05:00–07:00 · 2h window
High confidence
79%
🌫️Fog Probability100%
Dewpoint Spread: 0.1°C
Visibility: 33 (Dense fog)
Relative Humidity: 99%
Wind Speed: 1.7m/s (calm conditions)

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the namesake "smoke" that gives the Great Smoky Mountains their name—the natural fog and mist that creates atmospheric conditions found nowhere else in the eastern United States. We combine humidity, temperature, and topography to predict when valleys will fill with fog while ridgelines glow above.

The Smokies generate their own weather. Dense forests release moisture through transpiration, creating the persistent haze that appears as blue smoke from a distance. Add morning temperature inversions, and valleys like Cades Cove become fog-filled bowls with mountain ridges emerging from the mist. This phenomenon occurs year-round but peaks during autumn when humidity remains high and temperatures drop.

What makes Smoky Mountains fog photography exceptional:

  • Natural smoke effect - Forest transpiration creates the blue haze that's visible even on clear days, intensifying during foggy conditions
  • Cades Cove mornings - Historic valley becomes a sea of fog with churches and barns emerging as islands
  • Blue Ridge Parkway inversions - High-elevation overlooks look down on clouds filling valleys below
  • Appalachian character - Fog transforms familiar mountain landscapes into ancient, primeval scenes

Best fog occurs on clear, calm nights followed by sunny mornings, typically September through November. Arrive at Cades Cove before dawn to catch fog at its thickest. Blue Ridge Parkway overlooks like Clingmans Dome and Waterrock Knob offer views above the clouds. The fog typically burns off by mid-morning, so timing is critical.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 75.0%
Sun, May 17
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
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21:000%
22:000%
23:000%
Mon, May 18
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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22:000%
23:000%
Tue, May 19
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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13:000%
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20:000%
21:000%
22:000%
23:000%
Wed, May 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog Probability 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/New_York
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Sun, May 17 Sunrise 06:20 Sunset 20:28
09:00
2% 11°C 0mm 55% 0cm 30° 20°C 0mm 1.1kPa 24135m 0.71m/s 0.53m/s
10:00
3% 11°C 0mm 47% 0cm 43° 23°C 0mm 1.4kPa 24135m 0.81m/s 0.6m/s
11:00
5% 11°C 0mm 42% 0cm 54° 25°C 0mm 1.8kPa 24134m 0.53m/s 0.46m/s
12:00
7% 11°C 0mm 38% 0cm 65° 26°C 0mm 2.1kPa 24134m 1.7m/s 1.6m/s
13:00
9% 11°C 0mm 37% 0cm 72° 27°C 0mm 2.2kPa 24134m 2.7m/s 2.5m/s
14:00
11% 11°C 0mm 37% 0cm 72° 27°C 0mm 2.2kPa 24135m 3.3m/s 3.3m/s
15:00
37% 11°C 0mm 37% 0cm 63° 27°C 0mm 2.2kPa 24134m 3.7m/s 4.3m/s
16:00
62% 11°C 0mm 38% 0cm 52° 26°C 0mm 2.1kPa 24135m 3.9m/s 4.7m/s
17:00
88% 11°C 0mm 40% 0cm 40° 26°C 0mm 2kPa 24135m 4.4m/s 4.8m/s
18:00
91% 12°C 0mm 44% 0cm 28° 25°C 0mm 1.8kPa 24135m 5.2m/s 4.8m/s
19:00
94% 12°C 0mm 52% 0cm 16° 23°C 0mm 1.3kPa 24134m 7.1m/s 4.1m/s
20:00
97% 14°C 0mm 79% 0cm 4.6° 18°C 0.5mm 0.41kPa 24135m 1.9m/s 1.9m/s
21:00
98% 13°C 0mm 83% 0cm -6.4° 16°C 0.19mm 0.31kPa 24134m 1.2m/s 1.2m/s
22:00
99% 13°C 0mm 83% 0cm -16° 16°C 0.19mm 0.3kPa 24135m 0.9m/s 0.87m/s
23:00
100% 12°C 0mm 82% 0cm -25° 15°C 0.19mm 0.32kPa 24135m 1.2m/s 1.1m/s
Mon, May 18 Sunrise 06:19 Sunset 20:29
24:00
100% 12°C 0mm 80% 0cm -31° 16°C 0.19mm 0.36kPa 24135m 1.3m/s 1.2m/s
01:00
100% 12°C 0mm 80% 0cm -34° 15°C 0.19mm 0.34kPa 24134m 1.7m/s 1.7m/s
02:00
100% 12°C 0mm 84% 0cm -34° 15°C 0.19mm 0.27kPa 24135m 1.3m/s 1.5m/s
03:00
98% 12°C 0mm 87% 0cm -30° 14°C 0mm 0.22kPa 24134m 1m/s 1m/s
04:00
96% 12°C 0mm 90% 0cm -23° 14°C 0mm 0.16kPa 24135m 1.2m/s 1.1m/s
05:00
94% 12°C 0mm 91% 0cm -14° 14°C 0mm 0.14kPa 24135m 0.82m/s 0.79m/s
06:00
94% 12°C 0mm 92% 0cm -4.2° 14°C 0mm 0.12kPa 24134m 0.82m/s 0.67m/s
07:00
95% 13°C 0mm 90% 0cm 6.9° 14°C 0mm 0.17kPa 24134m 1m/s 1m/s
08:00
95% 14°C 0mm 80% 0cm 19° 18°C 0mm 0.4kPa 24134m 2.3m/s 1.5m/s
09:00
96% 15°C 0mm 70% 0cm 31° 20°C 0mm 0.72kPa 24135m 3.2m/s 2m/s
10:00
98% 14°C 0mm 56% 0cm 43° 23°C 0mm 1.2kPa 24134m 5.4m/s 2.4m/s
11:00
99% 13°C 0mm 47% 0cm 54° 25°C 0mm 1.6kPa 24135m 5.8m/s 3.3m/s
12:00
95% 10°C 0mm 38% 0cm 65° 25°C 0mm 2kPa 24134m 6.7m/s 4.3m/s
13:00
96% 9.7°C 0mm 36% 0cm 73° 26°C 0mm 2.1kPa 24135m 7m/s 4.8m/s
14:00
96% 9.3°C 0mm 34% 0cm 72° 27°C 0mm 2.3kPa 24135m 6.8m/s 4.6m/s
15:00
94% 9.1°C 0mm 33% 0cm 63° 27°C 0mm 2.4kPa 24135m 6.8m/s 4.6m/s
16:00
91% 9.2°C 0mm 33% 0cm 52° 27°C 0mm 2.3kPa 24135m 6.7m/s 4.5m/s
17:00
89% 9.4°C 0mm 35% 0cm 40° 26°C 0mm 2.2kPa 24135m 6.3m/s 4.4m/s
18:00
86% 11°C 0mm 40% 0cm 28° 25°C 0mm 1.9kPa 24135m 6.1m/s 4.3m/s
19:00
84% 12°C 0mm 49% 0cm 16° 23°C 0mm 1.4kPa 24135m 6.8m/s 4m/s
20:00
81% 13°C 0mm 64% 0cm 4.8° 20°C 0mm 0.84kPa 24134m 7m/s 2.7m/s
21:00
79% 12°C 0mm 72% 0cm -6.3° 17°C 0mm 0.55kPa 24135m 2.6m/s 1.9m/s
22:00
76% 11°C 0mm 70% 0cm -16° 17°C 0mm 0.57kPa 24135m 1.8m/s 1.7m/s
23:00
74% 10°C 0mm 68% 0cm -25° 16°C 0mm 0.59kPa 24135m 1.4m/s 1.3m/s
Tue, May 19 Sunrise 06:18 Sunset 20:29
24:00
71% 9.7°C 0mm 66% 0cm -31° 16°C 0mm 0.61kPa 24134m 1.2m/s 1.1m/s
01:00
68% 9.3°C 0mm 66% 0cm -34° 16°C 0mm 0.59kPa 24135m 1.2m/s 1.2m/s
02:00
65% 9.4°C 0mm 69% 0cm -33° 15°C 0mm 0.53kPa 24135m 1.7m/s 1.8m/s
03:00
59% 10°C 0mm 76% 0cm -30° 14°C 0mm 0.39kPa 24134m 1.4m/s 1.5m/s
04:00
54% 10°C 0mm 80% 0cm -23° 14°C 0mm 0.31kPa 24134m 0.9m/s 0.71m/s
05:00
48% 11°C 0mm 83% 0cm -14° 14°C 0mm 0.27kPa 24134m 0.91m/s 0.8m/s
06:00
47% 11°C 0mm 86% 0cm -4.1° 13°C 0mm 0.22kPa 24134m 1m/s 0.82m/s
07:00
46% 11°C 0mm 83% 0cm 7.1° 14°C 0mm 0.28kPa 24134m 0.81m/s 0.61m/s
08:00
45% 13°C 0mm 70% 0cm 19° 18°C 0mm 0.63kPa 24134m 1.3m/s 0.85m/s
09:00
40% 13°C 0mm 57% 0cm 31° 21°C 0mm 1.1kPa 24134m 3.1m/s 1.8m/s
10:00
34% 11°C 0mm 46% 0cm 43° 23°C 0mm 1.6kPa 24134m 5.5m/s 2.7m/s
11:00
29% 9.7°C 0mm 38% 0cm 55° 25°C 0mm 1.9kPa 24135m 5.7m/s 3.4m/s
12:00
29% 9.1°C 0mm 35% 0cm 65° 26°C 0mm 2.2kPa 24135m 5.7m/s 3.7m/s
13:00
29% 8.5°C 0mm 32% 0cm 73° 26°C 0mm 2.3kPa 24135m 6m/s 4.3m/s
14:00
29% 8.1°C 0mm 31% 0cm 72° 27°C 0mm 2.4kPa 24135m 6m/s 4.5m/s
15:00
29% 10°C 0mm 42% 0cm 63° 24°C 0mm 1.7kPa 24135m 4.3m/s 3.3m/s
16:00
28% 11°C 0mm 54% 0cm 52° 20°C 0mm 1.1kPa 24135m 2.6m/s 2.1m/s
17:00
28% 11°C 0mm 66% 0cm 40° 17°C 0mm 0.67kPa 24135m 0.84m/s 0.96m/s
18:00
26% 10°C 0mm 65% 0cm 28° 17°C 0mm 0.68kPa 24135m 0.77m/s 0.89m/s
19:00
25% 9.9°C 0mm 64% 0cm 16° 17°C 0mm 0.68kPa 24135m 0.7m/s 0.82m/s
20:00
23% 9.6°C 0mm 64% 0cm 4.9° 16°C 0mm 0.68kPa 24135m 0.63m/s 0.75m/s
21:00
19% 9.3°C 0mm 64% 0cm -6.1° 16°C 0mm 0.66kPa 24135m 0.76m/s 0.9m/s
22:00
15% 9°C 0mm 64% 0cm -16° 16°C 0mm 0.65kPa 24135m 0.89m/s 1m/s
23:00
11% 8.8°C 0mm 64% 0cm -24° 16°C 0mm 0.64kPa 24135m 1m/s 1.2m/s
Wed, May 20 Sunrise 06:17 Sunset 20:30
24:00
10% 9.7°C 0mm 64% 0cm -30° 17°C 0mm 0.68kPa 24135m 1.3m/s 1.3m/s
01:00
8% 11°C 0mm 64% 0cm -34° 18°C 0mm 0.73kPa 24135m 1.6m/s 1.4m/s
02:00
7% 12°C 0mm 63% 0cm -33° 19°C 0mm 0.78kPa 24135m 1.8m/s 1.5m/s
03:00
13% 11°C 0mm 55% 0cm -29° 21°C 0mm 1.1kPa 24135m 2.1m/s 1.6m/s
04:00
18% 11°C 0mm 47% 0cm -23° 23°C 0mm 1.5kPa 24135m 2.5m/s 1.7m/s
05:00
24% 10°C 0mm 39% 0cm -14° 25°C 0mm 1.9kPa 24135m 2.8m/s 1.8m/s
06:00
24% 9.9°C 0mm 37% 0cm -3.9° 26°C 0mm 2.1kPa 24135m 2.8m/s 1.9m/s
07:00
23% 9.8°C 0mm 34% 0cm 7.2° 27°C 0mm 2.3kPa 24135m 2.7m/s 1.9m/s
08:00
23% 9.5°C 0mm 32% 0cm 19° 28°C 0mm 2.5kPa 24135m 2.7m/s 2m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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