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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 Spread21.3°C
Visibility24134 (Clear)
Relative Humidity27%
Wind Speed3.6m/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
Fri, May 22 · 23:00–01:00 · 2h window
High confidence
80%
🌫️Fog Probability100%
Dewpoint Spread: 0.0°C
Visibility: 225 (Fog)
Relative Humidity: 100%
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 87 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%
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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%
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Wed, May 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
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07:000%
08:000%
09:000%
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23:000%
Thu, May 21
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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11:000%
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14:000%
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
16:00
82% 9.7°C 0mm 27% 0cm 54° 31°C 0mm 3.3kPa 24134m 6.2m/s 3.6m/s
17:00
74% 9.8°C 0mm 28% 0cm 42° 30°C 0mm 3.1kPa 24134m 6.5m/s 4.4m/s
18:00
69% 12°C 0mm 35% 0cm 29° 29°C 0mm 2.6kPa 24135m 6.1m/s 3.7m/s
19:00
65% 14°C 0mm 46% 0cm 17° 27°C 0mm 1.9kPa 24134m 6.8m/s 3.2m/s
20:00
60% 15°C 0mm 62% 0cm 5.8° 23°C 0mm 1kPa 24135m 5.3m/s 2.8m/s
21:00
52% 14°C 0mm 64% 0cm -5.3° 21°C 0mm 0.87kPa 24135m 6.5m/s 3.1m/s
22:00
43% 14°C 0mm 65% 0cm -15° 20°C 0mm 0.82kPa 24134m 6.7m/s 3.2m/s
23:00
35% 13°C 0mm 66% 0cm -24° 20°C 0mm 0.79kPa 24135m 4.4m/s 3.1m/s
Tue, May 19 Sunrise 06:26 Sunset 20:35
24:00
31% 12°C 0mm 64% 0cm -31° 19°C 0mm 0.79kPa 24135m 3.8m/s 3m/s
01:00
27% 12°C 0mm 64% 0cm -34° 19°C 0mm 0.78kPa 24134m 3.4m/s 3m/s
02:00
23% 12°C 0mm 65% 0cm -34° 18°C 0mm 0.72kPa 24134m 3m/s 2.9m/s
03:00
22% 12°C 0mm 68% 0cm -31° 18°C 0mm 0.64kPa 24135m 2.5m/s 2.8m/s
04:00
22% 12°C 0mm 70% 0cm -24° 17°C 0mm 0.59kPa 24135m 2.3m/s 2.6m/s
05:00
21% 12°C 0mm 71% 0cm -16° 17°C 0mm 0.57kPa 24134m 2.3m/s 2.7m/s
06:00
19% 12°C 0mm 72% 0cm -5.5° 17°C 0mm 0.54kPa 24135m 2.3m/s 2.6m/s
07:00
16% 12°C 0mm 76% 0cm 5.7° 17°C 0mm 0.46kPa 24134m 2.1m/s 2.4m/s
08:00
14% 14°C 0mm 72% 0cm 17° 19°C 0mm 0.62kPa 24135m 2.2m/s 1.8m/s
09:00
15% 14°C 0mm 58% 0cm 29° 23°C 0mm 1.1kPa 24135m 1.7m/s 0.82m/s
10:00
15% 14°C 0mm 50% 0cm 41° 25°C 0mm 1.6kPa 24134m 1.7m/s 0.69m/s
11:00
16% 13°C 0mm 41% 0cm 53° 27°C 0mm 2.1kPa 24134m 3.3m/s 1.1m/s
12:00
14% 12°C 0mm 36% 0cm 65° 28°C 0mm 2.4kPa 24135m 4.1m/s 1.5m/s
13:00
11% 12°C 0mm 35% 0cm 73° 29°C 0mm 2.6kPa 24135m 4.2m/s 2.2m/s
14:00
9% 12°C 0mm 33% 0cm 73° 30°C 0mm 2.8kPa 24134m 4.4m/s 1.6m/s
15:00
8% 11°C 0mm 31% 0cm 65° 30°C 0mm 3kPa 24135m 4.7m/s 1.9m/s
16:00
8% 12°C 0mm 32% 0cm 54° 30°C 0mm 2.9kPa 24135m 4.4m/s 3.2m/s
17:00
7% 12°C 0mm 34% 0cm 42° 29°C 0mm 2.7kPa 24134m 3.9m/s 3.4m/s
18:00
5% 14°C 0mm 42% 0cm 30° 28°C 0mm 2.2kPa 24135m 2.8m/s 2.1m/s
19:00
3% 16°C 0mm 55% 0cm 18° 26°C 0mm 1.5kPa 24134m 3.8m/s 2m/s
20:00
1% 17°C 0mm 70% 0cm 22°C 0mm 0.81kPa 24135m 0.7m/s 0.56m/s
21:00
1% 15°C 0mm 68% 0cm -5.2° 21°C 0mm 0.78kPa 24134m 1.7m/s 2m/s
22:00
2% 13°C 0mm 65% 0cm -15° 20°C 0mm 0.84kPa 24135m 1.8m/s 2.3m/s
23:00
2% 12°C 0mm 58% 0cm -24° 20°C 0mm 0.99kPa 24134m 2.2m/s 2.6m/s
Wed, May 20 Sunrise 06:25 Sunset 20:36
24:00
2% 9.6°C 0mm 53% 0cm -30° 20°C 0mm 1.1kPa 24135m 2.8m/s 2.9m/s
01:00
3% 8.7°C 0mm 50% 0cm -34° 19°C 0mm 1.1kPa 24135m 2.4m/s 2.7m/s
02:00
3% 8.6°C 0mm 50% 0cm -34° 19°C 0mm 1.1kPa 24134m 2m/s 2.4m/s
03:00
7% 8.9°C 0mm 50% 0cm -30° 20°C 0mm 1.1kPa 24135m 2m/s 2.3m/s
04:00
11% 9°C 0mm 51% 0cm -24° 20°C 0mm 1.1kPa 24135m 2m/s 2.2m/s
05:00
15% 9.2°C 0mm 52% 0cm -15° 19°C 0mm 1.1kPa 24135m 1.7m/s 2m/s
06:00
14% 9.4°C 0mm 53% 0cm -5.3° 19°C 0mm 1.1kPa 24135m 1.8m/s 2.1m/s
07:00
13% 11°C 0mm 60% 0cm 5.8° 18°C 0mm 0.83kPa 24135m 1.9m/s 2.3m/s
08:00
12% 13°C 0mm 64% 0cm 17° 20°C 0mm 0.83kPa 24135m 1.6m/s 1.6m/s
09:00
22% 13°C 0mm 52% 0cm 29° 24°C 0mm 1.4kPa 24135m 1.6m/s 0.88m/s
10:00
31% 13°C 0mm 45% 0cm 42° 26°C 0mm 1.8kPa 24134m 2.8m/s 1.2m/s
11:00
41% 13°C 0mm 43% 0cm 54° 27°C 0mm 2kPa 24134m 3.7m/s 2m/s
12:00
37% 13°C 0mm 41% 0cm 65° 28°C 0mm 2.2kPa 24135m 3.8m/s 3m/s
13:00
33% 14°C 0mm 42% 0cm 73° 28°C 0mm 2.2kPa 24134m 4m/s 3.5m/s
14:00
29% 15°C 0mm 45% 0cm 73° 27°C 0.06mm 2kPa 24134m 3.5m/s 3.2m/s
15:00
20% 17°C 0.13mm 67% 0cm 65° 23°C 0.44mm 0.91kPa 24135m 2.6m/s 0.93m/s
16:00
11% 17°C 0mm 67% 0cm 54° 23°C 0.5mm 0.92kPa 24134m 1.2m/s 1.4m/s
17:00
2% 16°C 0mm 50% 0cm 42° 27°C 0.5mm 1.8kPa 24134m 1.9m/s 0.94m/s
18:00
2% 16°C 0.33mm 51% 0cm 30° 26°C 0.56mm 1.7kPa 20381m 2.3m/s 0.39m/s
19:00
1% 18°C 0.81mm 96% 0cm 18° 19°C 3.1mm 0.09kPa 18178m 8.5m/s 3.6m/s
20:00
1% 18°C 0.06mm 98% 0cm 6.1° 18°C 3.8mm 0.05kPa 20648m 3m/s 0.86m/s
21:00
2% 16°C 0.04mm 96% 0cm -5° 17°C 2.5mm 0.08kPa 21810m 2.4m/s 0.98m/s
22:00
3% 15°C 0.02mm 94% 0cm -15° 16°C 1.3mm 0.1kPa 22973m 1.8m/s 1.1m/s
23:00
4% 14°C 0mm 93% 0cm -24° 15°C 0mm 0.12kPa 24135m 1.2m/s 1.2m/s
Thu, May 21 Sunrise 06:24 Sunset 20:36
24:00
4% 14°C 0mm 94% 0cm -30° 15°C 0.04mm 0.11kPa 24135m 1.3m/s 1.2m/s
01:00
5% 15°C 0mm 94% 0cm -34° 16°C 0.08mm 0.1kPa 24135m 1.3m/s 1.1m/s
02:00
5% 15°C 0mm 95% 0cm -34° 16°C 0.13mm 0.09kPa 24135m 1.4m/s 1m/s
03:00
10% 16°C 0mm 93% 0cm -30° 17°C 0.33mm 0.13kPa 21412m 1.4m/s 1m/s
04:00
15% 16°C 0mm 92% 0cm -24° 18°C 0.54mm 0.17kPa 18690m 1.4m/s 1m/s
05:00
20% 17°C 0mm 90% 0cm -15° 18°C 0.75mm 0.21kPa 15967m 1.4m/s 1m/s
06:00
19% 17°C 0.02mm 85% 0cm -5.2° 19°C 1.6mm 0.33kPa 13151m 2m/s 1.3m/s
07:00
19% 17°C 0.04mm 81% 0cm 5.9° 21°C 2.5mm 0.46kPa 10336m 2.7m/s 1.6m/s
08:00
18% 17°C 0.06mm 76% 0cm 17° 22°C 3.3mm 0.61kPa 7520m 3.3m/s 1.9m/s
09:00
17% 18°C 0.23mm 81% 0cm 29° 21°C 3.7mm 0.48kPa 10845m 2.6m/s 1.5m/s
10:00
17% 18°C 0.41mm 85% 0cm 42° 20°C 4mm 0.36kPa 14169m 1.9m/s 1.2m/s
11:00
16% 18°C 0.58mm 89% 0cm 54° 20°C 4.4mm 0.25kPa 17494m 1.2m/s 0.88m/s
12:00
15% 17°C 0.46mm 91% 0cm 65° 19°C 5.3mm 0.2kPa 15520m 1.6m/s 1.3m/s
13:00
13% 16°C 0.34mm 92% 0cm 73° 18°C 6.1mm 0.16kPa 13546m 2m/s 1.7m/s
14:00
12% 16°C 0.22mm 94% 0cm 73° 17°C 7mm 0.12kPa 11573m 2.3m/s 2.1m/s
15:00
9% 16°C 0.22mm 95% 0cm 65° 16°C 5.5mm 0.09kPa 11618m 2.1m/s 1.8m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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