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Rule Fog Hunter

Sylva - Fog Hunter - Smoky Mountains & Blue Ridge

Sylva, North Carolina, United States

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Dewpoint Spread5.7°C
Visibility24135 (Clear)
Relative Humidity71%
Wind Speed1.1m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

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%
Wed, Jul 8
24:0053%
01:0053%
02:0053%
03:0055%
04:0055%
05:0055%
06:0055%
07:0055%
08:0046%
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%
22:000%
23:000%
Thu, Jul 9
24:000%
01:000%
02:000%
03:000%
04:0055%
05:0055%
06:0055%
07:000%
08:000%
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%
22:000%
23:000%
Fri, Jul 10
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
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%
22:000%
23:000%
Sat, Jul 11
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
Wed, Jul 8 Sunrise 06:25 Sunset 20:50
10:00
100% 18°C 0mm 71% 0cm 41° 24°C 0mm 0.86kPa 24135m 2m/s 1.1m/s
11:00
100% 16°C 0mm 55% 0cm 53° 26°C 0mm 1.5kPa 24135m 2.8m/s 1.8m/s
12:00
95% 16°C 0mm 49% 0cm 65° 27°C 0mm 1.9kPa 24135m 3.1m/s 1.9m/s
13:00
89% 15°C 0mm 42% 0cm 75° 29°C 0mm 2.3kPa 24135m 3.5m/s 1.9m/s
14:00
84% 14°C 0mm 38% 0cm 76° 30°C 0mm 2.6kPa 24134m 4.5m/s 3.2m/s
15:00
57% 14°C 0mm 39% 0cm 68° 29°C 0mm 2.5kPa 24134m 4.7m/s 4.1m/s
16:00
29% 15°C 0mm 42% 0cm 57° 29°C 0mm 2.3kPa 24134m 4.7m/s 3.1m/s
17:00
2% 15°C 0mm 50% 0cm 44° 27°C 0mm 1.7kPa 24135m 5.9m/s 3.3m/s
18:00
3% 16°C 0mm 56% 0cm 32° 26°C 0mm 1.4kPa 24134m 5.8m/s 2.9m/s
19:00
5% 17°C 0mm 61% 0cm 20° 25°C 0mm 1.2kPa 24134m 5m/s 2.3m/s
20:00
6% 17°C 0mm 70% 0cm 8.6° 22°C 0mm 0.8kPa 24135m 1.2m/s 1.2m/s
21:00
37% 16°C 0mm 69% 0cm -2.4° 21°C 0mm 0.8kPa 24135m 0.7m/s 0.64m/s
22:00
69% 15°C 0mm 78% 0cm -13° 19°C 0mm 0.48kPa 24135m 0.5m/s 0.47m/s
23:00
100% 15°C 0mm 83% 0cm -21° 18°C 0mm 0.37kPa 24134m 0.7m/s 0.58m/s
Thu, Jul 9 Sunrise 06:25 Sunset 20:50
24:00
100% 15°C 0mm 86% 0cm -28° 18°C 0mm 0.29kPa 24134m 0.52m/s 0.6m/s
01:00
100% 15°C 0mm 88% 0cm -32° 17°C 0mm 0.23kPa 24134m 0.4m/s 0.3m/s
02:00
100% 15°C 0mm 92% 0cm -32° 17°C 0mm 0.16kPa 24135m 0.31m/s 0.28m/s
03:00
100% 15°C 0mm 94% 0cm -29° 16°C 0mm 0.1kPa 24135m 0.51m/s 0.42m/s
04:00
100% 15°C 0mm 96% 0cm -23° 16°C 0mm 0.08kPa 24134m 0.52m/s 0.5m/s
05:00
100% 15°C 0mm 96% 0cm -15° 16°C 0mm 0.07kPa 24135m 0.4m/s 0.3m/s
06:00
96% 15°C 0mm 96% 0cm -5.3° 16°C 0mm 0.07kPa 24134m 0.5m/s 0.37m/s
07:00
93% 16°C 0mm 95% 0cm 5.6° 16°C 0mm 0.09kPa 24135m 0.44m/s 0.43m/s
08:00
89% 17°C 0mm 86% 0cm 17° 19°C 0mm 0.29kPa 24135m 0.61m/s 0.14m/s
09:00
82% 17°C 0mm 72% 0cm 29° 22°C 0mm 0.75kPa 24134m 2.5m/s 0.93m/s
10:00
76% 16°C 0mm 60% 0cm 41° 24°C 0mm 1.2kPa 24135m 4.9m/s 2.1m/s
11:00
69% 16°C 0mm 55% 0cm 53° 26°C 0.06mm 1.5kPa 21680m 5.7m/s 2.9m/s
12:00
64% 16°C 0mm 54% 0cm 65° 26°C 0.25mm 1.6kPa 19240m 5.9m/s 3.4m/s
13:00
58% 16°C 0mm 49% 0cm 74° 27°C 0.44mm 1.8kPa 17731m 6m/s 3.7m/s
14:00
53% 15°C 0mm 44% 0cm 76° 28°C 0.5mm 2.1kPa 24135m 6.4m/s 4.1m/s
15:00
53% 15°C 0mm 42% 0cm 68° 29°C 0mm 2.3kPa 24134m 6.8m/s 4.5m/s
16:00
53% 15°C 0mm 44% 0cm 57° 28°C 0mm 2.1kPa 24135m 6.3m/s 4.5m/s
17:00
53% 15°C 0mm 46% 0cm 44° 28°C 0mm 2kPa 24135m 6m/s 4.2m/s
18:00
45% 16°C 0mm 56% 0cm 32° 26°C 0mm 1.4kPa 24135m 6.1m/s 3.5m/s
19:00
38% 18°C 0mm 70% 0cm 20° 23°C 0.19mm 0.85kPa 19849m 5.1m/s 2.6m/s
20:00
30% 19°C 0mm 86% 0cm 8.6° 21°C 0.31mm 0.37kPa 20993m 0.82m/s 0.87m/s
21:00
28% 17°C 0mm 88% 0cm -2.4° 19°C 0mm 0.28kPa 24135m 0.21m/s 0.11m/s
22:00
27% 17°C 0mm 92% 0cm -13° 18°C 0mm 0.16kPa 24135m 0.6m/s 0.53m/s
23:00
25% 17°C 0mm 93% 0cm -21° 18°C 0mm 0.15kPa 24134m 0.24m/s 0.03m/s
Fri, Jul 10 Sunrise 06:26 Sunset 20:49
24:00
29% 16°C 0mm 92% 0cm -28° 17°C 0mm 0.15kPa 24135m 0.7m/s 0.6m/s
01:00
32% 16°C 0mm 93% 0cm -32° 17°C 0mm 0.14kPa 24134m 0.33m/s 0.1m/s
02:00
36% 16°C 0mm 94% 0cm -32° 17°C 0mm 0.11kPa 24135m 0.33m/s 0.06m/s
03:00
45% 16°C 0mm 95% 0cm -29° 16°C 0mm 0.1kPa 24134m 0.43m/s 0.33m/s
04:00
53% 16°C 0mm 94% 0cm -23° 17°C 0mm 0.11kPa 24134m 0.61m/s 0.55m/s
05:00
62% 16°C 0mm 94% 0cm -15° 17°C 0mm 0.12kPa 24135m 0.91m/s 0.91m/s
06:00
56% 16°C 0mm 94% 0cm -5.4° 17°C 0mm 0.11kPa 24134m 0.7m/s 0.47m/s
07:00
51% 16°C 0mm 94% 0cm 5.5° 17°C 0mm 0.12kPa 24134m 0.7m/s 0.58m/s
08:00
45% 17°C 0mm 90% 0cm 17° 19°C 0mm 0.23kPa 24134m 0.72m/s 0.38m/s
09:00
38% 18°C 0mm 76% 0cm 29° 22°C 0mm 0.62kPa 24135m 5.1m/s 1.5m/s
10:00
30% 17°C 0mm 65% 0cm 41° 24°C 0.06mm 1.1kPa 24134m 7.2m/s 3.3m/s
11:00
23% 16°C 0mm 53% 0cm 53° 26°C 0.06mm 1.6kPa 24134m 7.8m/s 4.2m/s
12:00
20% 15°C 0mm 47% 0cm 65° 28°C 0.06mm 2kPa 24135m 7.7m/s 4.5m/s
13:00
17% 15°C 0mm 43% 0cm 74° 29°C 0.06mm 2.2kPa 24135m 7.4m/s 4.5m/s
14:00
14% 14°C 0mm 40% 0cm 76° 29°C 0.06mm 2.5kPa 24135m 6.6m/s 4.6m/s
15:00
14% 17°C 0mm 57% 0cm 68° 26°C 0.27mm 1.4kPa 24135m 5.5m/s 3.9m/s
16:00
14% 17°C 0mm 75% 0cm 57° 22°C 0.48mm 0.66kPa 24135m 4.5m/s 3.1m/s
17:00
14% 17°C 0mm 92% 0cm 44° 18°C 0.69mm 0.16kPa 24135m 3.4m/s 2.3m/s
18:00
12% 17°C 0mm 94% 0cm 32° 18°C 1.4mm 0.13kPa 23279m 3.1m/s 2.2m/s
19:00
9% 17°C 0mm 95% 0cm 20° 18°C 2mm 0.1kPa 22423m 2.8m/s 2.1m/s
20:00
7% 17°C 0mm 96% 0cm 8.6° 18°C 2.7mm 0.08kPa 21568m 2.4m/s 1.9m/s
21:00
8% 17°C 0.07mm 96% 0cm -2.5° 18°C 2.7mm 0.07kPa 22423m 2m/s 1.7m/s
22:00
8% 17°C 0.14mm 97% 0cm -13° 18°C 2.7mm 0.07kPa 23279m 1.6m/s 1.5m/s
23:00
9% 17°C 0.21mm 97% 0cm -21° 18°C 2.7mm 0.07kPa 24135m 1.2m/s 1.4m/s
Sat, Jul 11 Sunrise 06:27 Sunset 20:49
24:00
7% 18°C 0.14mm 96% 0cm -28° 18°C 2.8mm 0.08kPa 24135m 1.7m/s 1.5m/s
01:00
5% 18°C 0.07mm 96% 0cm -32° 18°C 2.8mm 0.09kPa 24135m 2.2m/s 1.6m/s
02:00
3% 18°C 0mm 95% 0cm -32° 19°C 2.9mm 0.1kPa 24135m 2.7m/s 1.8m/s
03:00
4% 18°C 0mm 83% 0cm -29° 21°C 2mm 0.42kPa 24135m 3.9m/s 2.1m/s
04:00
4% 18°C 0mm 71% 0cm -23° 23°C 1.2mm 0.83kPa 24135m 5.1m/s 2.5m/s
05:00
5% 17°C 0mm 58% 0cm -15° 25°C 0.38mm 1.3kPa 24135m 6.2m/s 2.8m/s
06:00
5% 18°C 0mm 69% 0cm -5.5° 24°C 1.1mm 0.94kPa 18659m 5.3m/s 2.5m/s
07:00
4% 19°C 0mm 79% 0cm 5.4° 23°C 1.9mm 0.6kPa 13184m 4.4m/s 2.2m/s
08:00
4% 20°C 0mm 89% 0cm 17° 22°C 2.6mm 0.29kPa 7709m 3.5m/s 1.9m/s
09:00
5% 19°C 3.3mm 92% 0cm 29° 21°C 7.5mm 0.18kPa 5295m 3.5m/s 1.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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