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Rule Fog Hunter

Asheville - Fog Hunter - Smoky Mountains & Blue Ridge

Asheville, North Carolina, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread0.8°C
Visibility13738 (Clear)
Relative Humidity95%
Wind Speed1.4m/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
Moderate Fog at Dawn
Asheville
Tue, May 26 · 05:00–06:00 · 1h window
Low confidence
39%
🌫️Fog Probability75.8%
Dewpoint Spread: 0.2°C
Visibility: 13808 (Clear)
Relative Humidity: 99%
Wind Speed: 1.1m/s (calm conditions)
fog weather icon
Moderate Fog at Sunrise
Asheville
Tue, May 26 · 06:00–07:00
🌫️Fog Probability:75.8%
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
7matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 75.0%
Sun, May 24
24:0065%
01:0068%
02:0068%
03:00100%
04:00100%
05:00100%
06:00100%
07:00100%
08:0069%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0055%
22:0073%
23:0039%
Mon, May 25
24:0041%
01:0042%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:0057%
10:0044%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, May 26
24:000%
01:000%
02:000%
03:0073%
04:0073%
05:0076%
06:0076%
07:0042%
08:0034%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0039%
23:0055%
Wed, May 27
24:0055%
01:0055%
02:0053%
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 24 Sunrise 06:19 Sunset 20:34
09:00
0% 15°C 0mm 95% 0cm 30° 16°C 0mm 0.09kPa 13738m 2.7m/s 1.4m/s
10:00
0% 15°C 0mm 94% 0cm 43° 16°C 0mm 0.11kPa 13504m 2.7m/s 1.5m/s
11:00
0% 15°C 0mm 92% 0cm 55° 17°C 0mm 0.16kPa 13452m 3.3m/s 1.5m/s
12:00
0% 16°C 0mm 88% 0cm 66° 18°C 0.06mm 0.25kPa 24116m 3.8m/s 1.7m/s
13:00
0% 16°C 0mm 82% 0cm 74° 19°C 0.06mm 0.39kPa 24134m 3.7m/s 2.1m/s
14:00
0% 16°C 0mm 80% 0cm 74° 20°C 0.06mm 0.45kPa 24134m 3.8m/s 2.6m/s
15:00
0% 16°C 0mm 79% 0cm 65° 20°C 0mm 0.49kPa 24135m 3.8m/s 2.6m/s
16:00
0% 16°C 0mm 75% 0cm 54° 21°C 0mm 0.63kPa 24134m 4.2m/s 3.1m/s
17:00
0% 17°C 0mm 73% 0cm 42° 22°C 0.06mm 0.7kPa 24135m 4.2m/s 3.3m/s
18:00
0% 16°C 0mm 75% 0cm 29° 21°C 0.06mm 0.62kPa 24134m 4.6m/s 3.5m/s
19:00
0% 17°C 0mm 81% 0cm 17° 20°C 0.06mm 0.46kPa 24135m 4.3m/s 2.7m/s
20:00
0% 17°C 0mm 90% 0cm 5.8° 19°C 0.19mm 0.23kPa 24135m 4.2m/s 2.1m/s
21:00
0% 17°C 0mm 96% 0cm -5.2° 17°C 0.19mm 0.07kPa 24135m 3.4m/s 1.9m/s
22:00
0% 16°C 0mm 98% 0cm -15° 16°C 0.19mm 0.04kPa 24135m 1.3m/s 1.5m/s
23:00
0% 16°C 0mm 98% 0cm -24° 16°C 0.25mm 0.03kPa 24135m 0.93m/s 0.99m/s
Mon, May 25 Sunrise 06:19 Sunset 20:35
24:00
0% 16°C 0mm 99% 0cm -30° 16°C 0.44mm 0.02kPa 20320m 1.3m/s 1.4m/s
01:00
0% 16°C 0.5mm 99% 0cm -33° 16°C 0.69mm 0.02kPa 18906m 1.2m/s 1.2m/s
02:00
0% 16°C 2.5mm 100% 0cm -33° 16°C 2.2mm 0.01kPa 4112m 1.3m/s 1.1m/s
03:00
0% 16°C 2.3mm 100% 0cm -29° 16°C 2.3mm 0.01kPa 1681m 1.1m/s 0.8m/s
04:00
0% 16°C 0.7mm 100% 0cm -23° 16°C 4.8mm 0.01kPa 1041m 2.9m/s 1.7m/s
05:00
0% 16°C 0.01mm 100% 0cm -14° 17°C 4.9mm 0.01kPa 1365m 1.2m/s 0.86m/s
06:00
0% 16°C 0mm 100% 0cm -4.1° 17°C 4.9mm 0.01kPa 697m 0.5m/s 0.38m/s
07:00
0% 17°C 0mm 99% 0cm 6.9° 17°C 4.9mm 0.01kPa 1628m 0.4m/s 0.42m/s
08:00
0% 17°C 0.01mm 99% 0cm 19° 17°C 4.9mm 0.03kPa 24135m 1.1m/s 0.71m/s
09:00
0% 17°C 0mm 98% 0cm 31° 17°C 0mm 0.05kPa 24134m 1.4m/s 0.88m/s
10:00
0% 17°C 0mm 96% 0cm 43° 18°C 0mm 0.08kPa 24134m 1.8m/s 1m/s
11:00
0% 17°C 0mm 87% 0cm 55° 20°C 0mm 0.3kPa 24134m 2.8m/s 1.4m/s
12:00
0% 17°C 0mm 71% 0cm 66° 23°C 0.06mm 0.79kPa 24134m 3.4m/s 2.3m/s
13:00
0% 17°C 0mm 65% 0cm 74° 24°C 0.13mm 1kPa 24119m 4.1m/s 2.7m/s
14:00
0% 16°C 0mm 54% 0cm 74° 26°C 0.19mm 1.5kPa 24128m 4.5m/s 2.7m/s
15:00
0% 17°C 0mm 59% 0cm 65° 26°C 0.44mm 1.4kPa 24117m 4.3m/s 2.8m/s
16:00
0% 18°C 0mm 63% 0cm 54° 25°C 0.94mm 1.2kPa 17986m 3.5m/s 2.2m/s
17:00
0% 21°C 0mm 86% 0cm 42° 23°C 1.8mm 0.39kPa 9719m 3.9m/s 1.8m/s
18:00
0% 21°C 0.03mm 91% 0cm 29° 22°C 3.1mm 0.23kPa 7292m 3.7m/s 1.6m/s
19:00
0% 19°C 0.05mm 94% 0cm 17° 19°C 4.8mm 0.13kPa 4587m 1.3m/s 1m/s
20:00
0% 18°C 0mm 95% 0cm 19°C 7.1mm 0.12kPa 5023m 1.2m/s 1.1m/s
21:00
0% 18°C 0mm 97% 0cm -5.1° 18°C 2mm 0.07kPa 5996m 1.4m/s 1.4m/s
22:00
0% 18°C 0.82mm 98% 0cm -15° 18°C 4.3mm 0.03kPa 4875m 5.9m/s 2m/s
23:00
0% 18°C 4.6mm 100% 0cm -23° 18°C 8.4mm 0.01kPa 1460m 5.7m/s 1.8m/s
Tue, May 26 Sunrise 06:18 Sunset 20:36
24:00
0% 18°C 1.3mm 98% 0cm -30° 18°C 12mm 0.03kPa 18749m 5.7m/s 1.6m/s
01:00
0% 18°C 0.03mm 99% 0cm -33° 18°C 13mm 0.03kPa 13887m 4.3m/s 2.1m/s
02:00
0% 17°C 0.01mm 99% 0cm -33° 17°C 13mm 0.03kPa 24100m 1.9m/s 1.4m/s
03:00
0% 17°C 0mm 99% 0cm -29° 17°C 0.06mm 0.02kPa 24113m 1.9m/s 1.4m/s
04:00
0% 16°C 0.01mm 99% 0cm -23° 17°C 0.19mm 0.02kPa 24135m 1.3m/s 1m/s
05:00
0% 16°C 0mm 99% 0cm -14° 16°C 0.19mm 0.02kPa 13808m 1.1m/s 1.1m/s
06:00
0% 16°C 0.09mm 99% 0cm -4° 16°C 0.19mm 0.01kPa 24133m 0.82m/s 0.84m/s
07:00
0% 16°C 0mm 99% 0cm 16°C 0.25mm 0.02kPa 24134m 0.7m/s 0.66m/s
08:00
0% 17°C 0mm 98% 0cm 19° 17°C 0.31mm 0.05kPa 24134m 1m/s 0.58m/s
09:00
0% 17°C 0mm 94% 0cm 31° 18°C 0mm 0.13kPa 24134m 1.3m/s 0.75m/s
10:00
0% 17°C 0mm 87% 0cm 43° 20°C 0mm 0.3kPa 24135m 2.2m/s 1.2m/s
11:00
0% 17°C 0mm 69% 0cm 55° 23°C 0mm 0.85kPa 24135m 2.4m/s 1.5m/s
12:00
0% 16°C 0mm 59% 0cm 66° 25°C 0mm 1.3kPa 24134m 2.5m/s 1.6m/s
13:00
0% 17°C 0mm 58% 0cm 74° 26°C 0.31mm 1.4kPa 16824m 2.4m/s 1.4m/s
14:00
0% 17°C 0mm 58% 0cm 74° 26°C 0.81mm 1.4kPa 17330m 1.8m/s 1m/s
15:00
0% 18°C 0.05mm 71% 0cm 65° 23°C 1.2mm 0.83kPa 19598m 1.5m/s 0.98m/s
16:00
0% 18°C 0.09mm 84% 0cm 54° 20°C 1.6mm 0.37kPa 21867m 1.2m/s 0.93m/s
17:00
0% 17°C 0.14mm 98% 0cm 42° 17°C 2.1mm 0.04kPa 24135m 0.9m/s 0.87m/s
18:00
0% 17°C 0.1mm 98% 0cm 30° 17°C 2.1mm 0.05kPa 24135m 0.87m/s 0.87m/s
19:00
0% 17°C 0.06mm 98% 0cm 18° 17°C 2.2mm 0.05kPa 24135m 0.83m/s 0.88m/s
20:00
0% 17°C 0.02mm 97% 0cm 6.1° 17°C 2.3mm 0.05kPa 24135m 0.8m/s 0.88m/s
21:00
0% 17°C 0.01mm 97% 0cm -4.9° 17°C 1.5mm 0.05kPa 24135m 0.74m/s 0.76m/s
22:00
0% 16°C 0.007mm 97% 0cm -15° 17°C 0.75mm 0.06kPa 24135m 0.69m/s 0.65m/s
23:00
0% 16°C 0mm 97% 0cm -23° 17°C 0mm 0.06kPa 24135m 0.63m/s 0.53m/s
Wed, May 27 Sunrise 06:18 Sunset 20:37
24:00
0% 17°C 0mm 96% 0cm -29° 17°C 0mm 0.07kPa 24135m 0.73m/s 0.64m/s
01:00
0% 17°C 0mm 96% 0cm -33° 17°C 0mm 0.08kPa 24135m 0.84m/s 0.75m/s
02:00
0% 17°C 0mm 96% 0cm -33° 18°C 0mm 0.09kPa 24135m 0.94m/s 0.86m/s
03:00
2% 17°C 0mm 93% 0cm -29° 18°C 0.06mm 0.14kPa 24131m 0.7m/s 0.63m/s
04:00
4% 17°C 0mm 91% 0cm -23° 19°C 0.13mm 0.19kPa 24126m 0.46m/s 0.4m/s
05:00
6% 18°C 0mm 89% 0cm -14° 19°C 0.19mm 0.25kPa 24122m 0.23m/s 0.18m/s
06:00
4% 18°C 0.07mm 90% 0cm -3.9° 19°C 0.71mm 0.22kPa 24126m 0.37m/s 0.29m/s
07:00
2% 18°C 0.15mm 92% 0cm 7.1° 20°C 1.2mm 0.19kPa 24130m 0.52m/s 0.4m/s
08:00
0% 19°C 0.22mm 93% 0cm 19° 20°C 1.8mm 0.16kPa 24135m 0.67m/s 0.51m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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