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Rule Fog Hunter

Gatlinburg - Fog Hunter - Smoky Mountains & Blue Ridge

Gatlinburg, Tennessee, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread1.8°C
Visibility24134 (Clear)
Relative Humidity89%
Wind Speed2.6m/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
Gatlinburg
Thu, May 21 · 23:00–03:00 · 4h window
High confidence
76%
🌫️Fog Probability91.1%
Dewpoint Spread: 0.1°C
Visibility: 6818 (Moderate)
Relative Humidity: 99%
Wind Speed: 1.7m/s (calm conditions)
fog weather icon
Dense Fog
Gatlinburg
Fri, May 22 · 22:00–02:00
🌫️Fog Probability:79.7-91.1%
Low

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 75 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 75.0%
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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21:000%
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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23:000%
Wed, May 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
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13:000%
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15:000%
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17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:0055%
Thu, May 21
24:000%
01:000%
02:000%
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
Mon, May 18 Sunrise 06:26 Sunset 20:34
04:00
97% 15°C 0mm 89% 0cm -24° 17°C 0mm 0.21kPa 24134m 2.4m/s 2.6m/s
05:00
95% 15°C 0mm 88% 0cm -16° 17°C 0mm 0.22kPa 24135m 2.3m/s 2.6m/s
06:00
96% 14°C 0mm 86% 0cm -5.6° 17°C 0mm 0.26kPa 24134m 2.4m/s 2.6m/s
07:00
96% 14°C 0mm 86% 0cm 5.6° 17°C 0mm 0.26kPa 24135m 2.2m/s 2.4m/s
08:00
97% 16°C 0mm 82% 0cm 17° 19°C 0mm 0.4kPa 24134m 2.4m/s 1.8m/s
09:00
98% 16°C 0mm 67% 0cm 29° 22°C 0mm 0.89kPa 24134m 2.1m/s 0.98m/s
10:00
99% 16°C 0mm 56% 0cm 41° 25°C 0mm 1.4kPa 24135m 2.8m/s 0.64m/s
11:00
100% 15°C 0mm 48% 0cm 53° 27°C 0mm 1.8kPa 24134m 4.3m/s 0.97m/s
12:00
100% 14°C 0mm 41% 0cm 64° 28°C 0mm 2.3kPa 24134m 5.1m/s 1m/s
13:00
99% 13°C 0mm 36% 0cm 73° 29°C 0mm 2.6kPa 24134m 5.5m/s 1.7m/s
14:00
99% 11°C 0mm 30% 0cm 73° 31°C 0mm 3.1kPa 24134m 6.4m/s 2.6m/s
15:00
93% 9.8°C 0mm 27% 0cm 65° 31°C 0mm 3.3kPa 24135m 6.3m/s 3.9m/s
16:00
86% 9.6°C 0mm 27% 0cm 54° 31°C 0mm 3.2kPa 24134m 6.2m/s 4.4m/s
17:00
80% 11°C 0mm 30% 0cm 42° 30°C 0mm 2.9kPa 24134m 6.2m/s 4.6m/s
18:00
79% 13°C 0mm 38% 0cm 29° 29°C 0mm 2.5kPa 24135m 6.3m/s 3.8m/s
19:00
78% 15°C 0mm 48% 0cm 17° 27°C 0mm 1.8kPa 24134m 6.2m/s 2.9m/s
20:00
77% 16°C 0mm 64% 0cm 5.8° 23°C 0mm 1kPa 24135m 5.3m/s 2.9m/s
21:00
70% 14°C 0mm 64% 0cm -5.3° 21°C 0mm 0.89kPa 24135m 8.3m/s 3.4m/s
22:00
62% 13°C 0mm 61% 0cm -15° 21°C 0mm 0.94kPa 24134m 8.3m/s 3.6m/s
23:00
55% 12°C 0mm 58% 0cm -24° 20°C 0mm 0.99kPa 24135m 7.1m/s 3.5m/s
Tue, May 19 Sunrise 06:26 Sunset 20:35
24:00
50% 11°C 0mm 56% 0cm -31° 20°C 0mm 1kPa 24134m 5.4m/s 3.5m/s
01:00
46% 11°C 0mm 57% 0cm -34° 19°C 0mm 0.96kPa 24135m 4.2m/s 3.2m/s
02:00
41% 11°C 0mm 61% 0cm -34° 19°C 0mm 0.83kPa 24135m 3m/s 2.9m/s
03:00
40% 11°C 0mm 64% 0cm -31° 18°C 0mm 0.74kPa 24134m 2.5m/s 2.7m/s
04:00
40% 11°C 0mm 67% 0cm -24° 17°C 0mm 0.65kPa 24134m 2.3m/s 2.6m/s
05:00
39% 12°C 0mm 69% 0cm -16° 17°C 0mm 0.6kPa 24135m 2.3m/s 2.7m/s
06:00
35% 12°C 0mm 72% 0cm -5.5° 17°C 0mm 0.54kPa 24134m 2.2m/s 2.5m/s
07:00
30% 12°C 0mm 74% 0cm 5.7° 17°C 0mm 0.49kPa 24135m 2.2m/s 2.5m/s
08:00
26% 14°C 0mm 72% 0cm 17° 19°C 0mm 0.61kPa 24135m 2.8m/s 2.2m/s
09:00
22% 14°C 0mm 59% 0cm 29° 22°C 0mm 1.1kPa 24134m 2.1m/s 1.2m/s
10:00
17% 14°C 0mm 51% 0cm 41° 24°C 0mm 1.5kPa 24134m 2m/s 1.1m/s
11:00
13% 13°C 0mm 46% 0cm 53° 26°C 0mm 1.8kPa 24134m 3m/s 1.2m/s
12:00
12% 12°C 0mm 41% 0cm 65° 27°C 0mm 2.1kPa 24135m 3.6m/s 1.5m/s
13:00
12% 13°C 0mm 42% 0cm 73° 27°C 0mm 2kPa 24134m 3.3m/s 1.3m/s
14:00
11% 12°C 0mm 36% 0cm 73° 28°C 0mm 2.5kPa 24134m 4.7m/s 1.3m/s
15:00
8% 11°C 0mm 32% 0cm 65° 30°C 0mm 2.8kPa 24134m 5.3m/s 1.7m/s
16:00
5% 11°C 0mm 33% 0cm 54° 29°C 0mm 2.8kPa 24135m 4.6m/s 2.1m/s
17:00
2% 12°C 0mm 35% 0cm 42° 29°C 0mm 2.5kPa 24135m 3.2m/s 1.9m/s
18:00
2% 13°C 0mm 41% 0cm 30° 28°C 0mm 2.2kPa 24135m 3.4m/s 1.5m/s
19:00
1% 16°C 0mm 60% 0cm 18° 25°C 0mm 1.2kPa 24134m 2.4m/s 0.96m/s
20:00
1% 16°C 0mm 71% 0cm 21°C 0mm 0.72kPa 24135m 0.71m/s 0.67m/s
21:00
1% 14°C 0mm 70% 0cm -5.2° 20°C 0mm 0.68kPa 24134m 1.9m/s 2.3m/s
22:00
0% 13°C 0mm 66% 0cm -15° 19°C 0mm 0.74kPa 24134m 2.4m/s 2.8m/s
23:00
0% 12°C 0mm 64% 0cm -24° 18°C 0mm 0.75kPa 24135m 2.3m/s 2.8m/s
Wed, May 20 Sunrise 06:25 Sunset 20:36
24:00
0% 11°C 0mm 63% 0cm -30° 18°C 0mm 0.77kPa 24134m 2.3m/s 2.9m/s
01:00
0% 11°C 0mm 61% 0cm -34° 18°C 0mm 0.8kPa 24135m 2.3m/s 2.8m/s
02:00
0% 10°C 0mm 61% 0cm -34° 18°C 0mm 0.8kPa 24134m 2.2m/s 2.7m/s
03:00
7% 10°C 0mm 60% 0cm -30° 18°C 0mm 0.81kPa 24134m 2.4m/s 2.8m/s
04:00
15% 10°C 0mm 61% 0cm -24° 18°C 0mm 0.8kPa 24134m 2.2m/s 2.5m/s
05:00
22% 9.9°C 0mm 61% 0cm -15° 18°C 0mm 0.79kPa 24135m 2m/s 2.5m/s
06:00
22% 9.8°C 0mm 61% 0cm -5.3° 17°C 0mm 0.76kPa 24135m 1.7m/s 2.1m/s
07:00
23% 11°C 0mm 66% 0cm 5.8° 17°C 0mm 0.64kPa 24135m 1.2m/s 1.4m/s
08:00
23% 13°C 0mm 68% 0cm 17° 19°C 0mm 0.69kPa 24135m 1m/s 0.83m/s
09:00
25% 13°C 0mm 61% 0cm 29° 21°C 0.02mm 0.96kPa 24135m 1.5m/s 0.95m/s
10:00
27% 13°C 0mm 54% 0cm 42° 23°C 0.04mm 1.3kPa 24135m 2m/s 1.1m/s
11:00
29% 13°C 0mm 47% 0cm 54° 25°C 0.06mm 1.7kPa 24135m 2.4m/s 1.2m/s
12:00
27% 15°C 0.61mm 63% 0cm 65° 22°C 1.1mm 1kPa 20928m 2.4m/s 1.4m/s
13:00
25% 16°C 1.2mm 78% 0cm 73° 20°C 2.1mm 0.5kPa 17721m 2.4m/s 1.7m/s
14:00
23% 16°C 1.8mm 94% 0cm 73° 17°C 3.1mm 0.12kPa 14514m 2.4m/s 2m/s
15:00
17% 16°C 1.3mm 95% 0cm 65° 17°C 3mm 0.1kPa 15919m 2.1m/s 1.8m/s
16:00
11% 16°C 0.71mm 95% 0cm 54° 16°C 3mm 0.09kPa 17324m 1.8m/s 1.6m/s
17:00
5% 15°C 0.15mm 96% 0cm 42° 16°C 2.9mm 0.08kPa 18728m 1.5m/s 1.5m/s
18:00
5% 15°C 0.1mm 96% 0cm 30° 16°C 2.9mm 0.07kPa 20531m 1.5m/s 1.4m/s
19:00
4% 15°C 0.05mm 96% 0cm 18° 15°C 3mm 0.07kPa 22333m 1.4m/s 1.4m/s
20:00
4% 14°C 0mm 96% 0cm 6.1° 15°C 3mm 0.07kPa 24135m 1.4m/s 1.4m/s
21:00
4% 14°C 0mm 96% 0cm -5° 15°C 2mm 0.07kPa 24135m 1.2m/s 1.2m/s
22:00
4% 14°C 0mm 96% 0cm -15° 14°C 1mm 0.07kPa 24135m 1.1m/s 1m/s
23:00
4% 14°C 0mm 96% 0cm -24° 14°C 0mm 0.07kPa 24135m 1m/s 0.84m/s
Thu, May 21 Sunrise 06:24 Sunset 20:36
24:00
5% 14°C 0mm 95% 0cm -30° 15°C 0.02mm 0.08kPa 24135m 1.2m/s 0.92m/s
01:00
5% 15°C 0mm 94% 0cm -34° 16°C 0.04mm 0.1kPa 24135m 1.3m/s 1m/s
02:00
6% 16°C 0mm 94% 0cm -34° 17°C 0.06mm 0.12kPa 24135m 1.4m/s 1.1m/s
03:00
11% 16°C 0mm 91% 0cm -30° 18°C 0.44mm 0.17kPa 18480m 1.4m/s 1.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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