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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 Spread3.0°C
Visibility9532 (Moderate)
Relative Humidity79%
Wind Speed3.9m/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 (lingering)
Gatlinburg
Wed, Feb 25 · 13:00–15:00 · 2h window
Medium confidence
62%
🌫️Fog Probability95.6%
Dewpoint Spread: 0.0°C
Visibility: 422 (Fog)
Relative Humidity: 100%
Wind Speed: 1.4m/s (calm conditions)
fog weather icon
Dense Fog (lingering)
Gatlinburg
Wed, Feb 25 · 22:00–24:00
🌫️Fog Probability:100%
Medium

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
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 85.0%
Dewpoint Spread
≤ 2.0°C
Visibility
≤ 3000.0m
Wind Speed
≤ 2.0m/s
Sat, Feb 21
20:000%2.5°C24135m1.1m/s
21:000%3.2°C21067m3.3m/s
22:000%2.4°C24135m3.3m/s
23:000%1.3°C8898m1.7m/s
Sun, Feb 22
24:000%1.2°C16120m0.51m/s
01:0040%0.7°C5070m1.9m/s
02:0061%0.3°C49m2.1m/s
03:0063%0.2°C26m2m/s
04:000%0.2°C27m2m/s
05:000%0.3°C31m2.6m/s
06:000%0.6°C76m2.6m/s
07:000%1.1°C222m2.5m/s
08:0053%1.3°C251m2m/s
09:0046%1.2°C226m2.6m/s
10:000%3°C5261m4.5m/s
11:000%4.3°C5611m4.7m/s
12:000%4.2°C8984m4.6m/s
13:000%5.4°C10274m5.4m/s
14:000%5.2°C11217m6.2m/s
15:000%4.9°C9575m6m/s
16:0016%4.2°C2097m5.7m/s
17:000%3.9°C2108m4.8m/s
18:000%3.5°C2668m4.4m/s
19:000%3°C3489m4.4m/s
20:000%2.9°C8931m4.4m/s
21:000%3°C9532m3.9m/s
22:000%2.7°C8889m3.9m/s
23:000%2.5°C8776m4.2m/s
Mon, Feb 23
24:000%2.4°C8744m4.3m/s
01:000%2.5°C3638m4.3m/s
02:000%2.5°C5718m4m/s
03:000%2.3°C3573m3.6m/s
04:0039%2.2°C1044m3.4m/s
05:000%2°C367m3.3m/s
06:000%2.1°C303m3.2m/s
07:000%2.1°C279m3m/s
08:0044%2.3°C310m2.9m/s
09:0039%2.7°C351m3.1m/s
10:0028%3.5°C1483m3.3m/s
11:000%4.4°C5163m3.7m/s
12:000%4.6°C4327m3.9m/s
13:000%4.9°C4103m4.3m/s
14:000%5.2°C5280m4.2m/s
15:000%6.2°C11437m4.7m/s
16:000%6.2°C14006m4.7m/s
17:000%6°C14029m4.1m/s
18:000%5.4°C14480m3.6m/s
19:000%4.7°C18222m2.7m/s
20:000%3.6°C17727m1.7m/s
21:000%3.4°C11392m1.6m/s
22:000%3.2°C11719m1.6m/s
23:000%3.3°C17651m1.3m/s
Tue, Feb 24
24:000%3.1°C19165m0.93m/s
01:000%3.1°C21302m0.78m/s
02:000%2.7°C22263m0.93m/s
03:000%2.1°C22255m1.4m/s
04:000%1.9°C22252m1.4m/s
05:000%1.9°C24134m1.7m/s
06:000%2.1°C24135m1.6m/s
07:000%2.5°C24135m1.4m/s
08:000%4°C24135m0.79m/s
09:000%6.4°C24135m0.16m/s
10:000%8.4°C24134m0.7m/s
11:000%9.3°C24134m1.3m/s
12:000%9.4°C24134m2m/s
13:000%9.4°C24134m2.1m/s
14:000%9.8°C24135m2.2m/s
15:000%9.8°C24135m2.3m/s
16:000%9.1°C24134m2.2m/s
17:000%6.7°C24134m1.7m/s
18:000%3.2°C24135m1.6m/s
19:000%2.9°C24134m2.5m/s
20:000%3.4°C24135m2.6m/s
21:000%3.6°C24135m2.8m/s
22:000%3.9°C24134m3m/s
23:000%3.8°C24135m3m/s
Wed, Feb 25
24:000%3.7°C24134m3m/s
01:000%3.8°C24135m3.1m/s
02:000%3.6°C24135m2.9m/s
03:000%3.6°C24135m2.6m/s
04:000%3.5°C24135m2.4m/s
05:000%3°C22193m2.4m/s
06:000%2.4°C20252m2.4m/s
07:000%1.9°C18310m2.4m/s
08:000%1.6°C18330m2.1m/s
09:000%1.2°C18350m1.9m/s
10:0048%1°C18369m1.6m/s
11:0058%0.7°C12387m1.6m/s
12:0067%0.3°C6404m1.5m/s
13:0096%0°C422m1.4m/s
14:0096%0.1°C334m1.4m/s
15:0048%0.1°C247m1.3m/s
16:0048%0°C159m1.2m/s
17:0053%0°C149m1.3m/s
18:0060%0°C139m1.4m/s
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
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Wind Gusts
m/s
Sun, Feb 22 Sunrise 07:11 Sunset 18:23
21:00
-8.4°C 0.14mm 79% 0.2cm -5.4°C 0.44mm 0.08kPa 8.7m/s
22:00
-8.4°C 0.24mm 82% 0cm -5.7°C 0.63mm 0.07kPa 8.7m/s
23:00
-8.5°C 0.28mm 82% 0cm -6°C 0.88mm 0.07kPa 8.9m/s
Mon, Feb 23 Sunrise 07:11 Sunset 18:23
24:00
-8.8°C 0.32mm 83% 0cm -6.4°C 1.1mm 0.06kPa 8.9m/s
01:00
-9.1°C 0.27mm 82% 0.32cm -6.6°C 1.4mm 0.07kPa 8.9m/s
02:00
-9.3°C 0.27mm 82% 0.3cm -6.8°C 0.25mm 0.07kPa 8.5m/s
03:00
-9.3°C 0.27mm 83% 0.3cm -7°C 0.44mm 0.06kPa 8.1m/s
04:00
-9.3°C 0.31mm 84% 0.33cm -7.1°C 0.69mm 0.06kPa 7.7m/s
05:00
-9.3°C 0.35mm 85% 0.37cm -7.3°C 1mm 0.05kPa 7.6m/s
06:00
-9.5°C 0.36mm 85% 0.37cm -7.4°C 1.3mm 0.05kPa 7.4m/s
07:00
-9.7°C 0.35mm 85% 0.35cm -7.6°C 1.6mm 0.05kPa 7.4m/s
08:00
-9.8°C 0.32mm 84% 0.33cm -7.5°C 0.25mm 0.06kPa 7m/s
09:00
-9.5°C 0.35mm 81% 0.37cm -6.8°C 0.56mm 0.07kPa 6.8m/s
10:00
-9.4°C 0.27mm 76% 0.3cm -5.9°C 0.81mm 0.09kPa 6.7m/s
11:00
-9.4°C 0.2mm 71% 0.23cm -5°C 1mm 0.12kPa 7.5m/s
12:00
-9.2°C 0.2mm 70% 0.24cm -4.6°C 1.2mm 0.13kPa 7.7m/s
13:00
-9°C 0.21mm 69% 0.26cm -4.1°C 1.4mm 0.14kPa 7.8m/s
14:00
-8.9°C 0.19mm 67% 0.24cm -3.7°C 0.19mm 0.15kPa 8m/s
15:00
-9.2°C 0.11mm 62% 0cm -3°C 0.31mm 0.19kPa 8.3m/s
16:00
-9°C 0.06mm 62% 0cm -2.8°C 0.44mm 0.19kPa 8.3m/s
17:00
-8.6°C 0.04mm 64% 0cm -2.6°C 0.5mm 0.18kPa 8m/s
18:00
-8.8°C 0.03mm 66% 0cm -3.4°C 0.5mm 0.16kPa 7.5m/s
19:00
-8.9°C 0.02mm 70% 0cm -4.2°C 0.56mm 0.14kPa 7.5m/s
20:00
-9°C 0.02mm 76% 0.04cm -5.4°C 0mm 0.1kPa 5.2m/s
21:00
-8.9°C 0.03mm 77% 0.05cm -5.5°C 0.06mm 0.09kPa 4.3m/s
22:00
-8.9°C 0.02mm 78% 0cm -5.7°C 0.06mm 0.09kPa 4.3m/s
23:00
-8.9°C 0.01mm 77% 0cm -5.6°C 0.13mm 0.09kPa 3.5m/s
Tue, Feb 24 Sunrise 07:10 Sunset 18:24
24:00
-9°C 0mm 78% 0cm -5.9°C 0.13mm 0.09kPa 2.2m/s
01:00
-10°C 0.01mm 78% 0cm -6.9°C 0.13mm 0.08kPa 1.2m/s
02:00
-11°C 0mm 81% 0cm -8.1°C 0mm 0.06kPa 1m/s
03:00
-11°C 0mm 85% 0cm -9.4°C 0mm 0.05kPa 1.2m/s
04:00
-12°C 0mm 86% 0cm -9.9°C 0mm 0.04kPa 1.1m/s
05:00
-12°C 0mm 86% 0cm -10°C 0mm 0.04kPa 1.2m/s
06:00
-12°C 0mm 85% 0cm -9.9°C 0mm 0.04kPa 1.3m/s
07:00
-12°C 0mm 82% 0cm -9.2°C 0mm 0.05kPa 1.2m/s
08:00
-11°C 0mm 74% 0cm -7.2°C 0mm 0.09kPa 0.9m/s
09:00
-11°C 0mm 61% 0cm -4.3°C 0mm 0.18kPa 0.62m/s
10:00
-10°C 0mm 53% 0cm -1.6°C 0mm 0.26kPa 1.1m/s
11:00
-9.1°C 0mm 50% 0cm 0.16°C 0mm 0.31kPa 2.1m/s
12:00
-7.8°C 0mm 50% 0cm 1.6°C 0mm 0.34kPa 3.3m/s
13:00
-6.7°C 0mm 50% 0cm 2.7°C 0mm 0.37kPa 3.7m/s
14:00
-5.9°C 0mm 49% 0cm 3.9°C 0mm 0.41kPa 3.9m/s
15:00
-5.1°C 0mm 49% 0cm 4.7°C 0mm 0.43kPa 4.3m/s
16:00
-4.4°C 0mm 51% 0cm 4.7°C 0mm 0.42kPa 3.9m/s
17:00
-2.4°C 0mm 62% 0cm 4.3°C 0mm 0.32kPa 3.5m/s
18:00
-2.2°C 0mm 79% 0cm 1°C 0mm 0.14kPa 1.4m/s
19:00
-3.2°C 0mm 80% 0cm -0.25°C 0mm 0.12kPa 2m/s
20:00
-3.5°C 0mm 78% 0cm -0.08°C 0mm 0.13kPa 2.2m/s
21:00
-3.9°C 0mm 77% 0cm -0.34°C 0mm 0.14kPa 2.6m/s
22:00
-4.1°C 0mm 75% 0cm -0.23°C 0mm 0.15kPa 3.4m/s
23:00
-4.4°C 0mm 75% 0cm -0.56°C 0mm 0.15kPa 3.3m/s
Wed, Feb 25 Sunrise 07:09 Sunset 18:25
24:00
-4.5°C 0mm 76% 0cm -0.84°C 0mm 0.14kPa 3.4m/s
01:00
-4.3°C 0mm 76% 0cm -0.49°C 0mm 0.14kPa 3.7m/s
02:00
-2.5°C 0mm 76% 0cm 1.1°C 0mm 0.16kPa 4.1m/s
03:00
-0.8°C 0mm 77% 0cm 2.8°C 0mm 0.17kPa 4.5m/s
04:00
0.9°C 0mm 78% 0cm 4.4°C 0mm 0.18kPa 4.8m/s
05:00
1.9°C 0mm 81% 0cm 4.9°C 0mm 0.16kPa 4.6m/s
06:00
3°C 0mm 84% 0cm 5.4°C 0mm 0.14kPa 4.4m/s
07:00
4°C 0mm 87% 0cm 5.9°C 0mm 0.12kPa 4.1m/s
08:00
4.1°C 0mm 89% 0cm 5.7°C 0mm 0.1kPa 3.7m/s
09:00
4.3°C 0mm 91% 0cm 5.5°C 0mm 0.08kPa 3.3m/s
10:00
4.4°C 0mm 94% 0cm 5.4°C 0mm 0.06kPa 2.8m/s
11:00
4°C 0.01mm 96% 0cm 4.7°C 0mm 0.04kPa 2.5m/s
12:00
3.7°C 0.02mm 98% 0cm 4°C 0mm 0.02kPa 2.2m/s
13:00
3.3°C 0.03mm 100% 0cm 3.3°C 0mm 0kPa 1.9m/s
14:00
3.2°C 0.13mm 100% 0cm 3.3°C 0.17mm 0kPa 1.8m/s
15:00
3.1°C 0.22mm 100% 0cm 3.2°C 0.33mm 0kPa 1.8m/s
16:00
3.1°C 0.32mm 100% 0cm 3.1°C 0.5mm 0kPa 1.7m/s
17:00
3.2°C 0.21mm 100% 0cm 3.2°C 0.65mm 0kPa 1.8m/s
18:00
3.3°C 0.11mm 100% 0cm 3.3°C 0.79mm 0kPa 2m/s
19:00
3.4°C 0mm 100% 0cm 3.5°C 0.94mm 0kPa 2.1m/s
20:00
3.7°C 0.01mm 100% 0cm 3.7°C 0.67mm 0kPa 2.2m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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