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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 Spread4.9°C
Visibility24135 (Clear)
Relative Humidity70%
Wind Speed1.1m/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
Asheville
Thu, Apr 16 · 23:00–02:00 · 3h window
Medium confidence
44%
🌫️Fog Probability62.7-88.6%
Dewpoint Spread: 0.3°C
Visibility: 24135 (Clear)
Relative Humidity: 98%
Wind Speed: 1.9m/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 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 60.0%
Wed, Apr 8
03:000%
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Thu, Apr 9
24:000%
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Fri, Apr 10
24:000%
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Sat, Apr 11
24:000%
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23:000%
Sun, Apr 12
24:000%
01:000%
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
Thu, Apr 9 Sunrise 07:05 Sunset 19:58
04:00
1% -2.4°C 0mm 70% 0cm -34° 2.5°C 0mm 0.22kPa 24135m 1.1m/s 1.1m/s
05:00
2% -2.6°C 0mm 71% 0cm -25° 2.2°C 0mm 0.21kPa 24134m 1.1m/s 1.1m/s
06:00
1% -2.8°C 0mm 73% 0cm -14° 1.5°C 0mm 0.18kPa 24135m 1.1m/s 1.2m/s
07:00
1% -3.1°C 0mm 74% 0cm -1.8° 1°C 0mm 0.17kPa 24134m 0.91m/s 0.98m/s
08:00
0% -2.8°C 0mm 66% 0cm 10° 2.9°C 0mm 0.26kPa 24134m 0.7m/s 0.55m/s
09:00
3% -2.8°C 0mm 53% 0cm 22° 6°C 0mm 0.44kPa 24135m 1m/s 0.66m/s
10:00
7% -2.7°C 0mm 44% 0cm 34° 8.8°C 0mm 0.63kPa 24135m 1.8m/s 1.2m/s
11:00
10% -2.4°C 0mm 38% 0cm 46° 11°C 0mm 0.84kPa 24135m 2.1m/s 1.7m/s
12:00
15% -2.1°C 0mm 33% 0cm 55° 14°C 0mm 1.1kPa 24134m 2m/s 2m/s
13:00
19% -1.7°C 0mm 31% 0cm 61° 15°C 0mm 1.2kPa 24135m 2.2m/s 2.5m/s
14:00
24% -1.3°C 0mm 30% 0cm 61° 17°C 0mm 1.3kPa 24135m 2.2m/s 2.8m/s
15:00
37% -0.9°C 0mm 30% 0cm 56° 17°C 0mm 1.4kPa 24135m 2.5m/s 3m/s
16:00
49% -0.6°C 0mm 30% 0cm 46° 17°C 0mm 1.3kPa 24135m 2.6m/s 3.2m/s
17:00
62% -0.3°C 0mm 32% 0cm 35° 16°C 0mm 1.3kPa 24134m 2.9m/s 3.2m/s
18:00
66% 0°C 0mm 35% 0cm 23° 16°C 0mm 1.1kPa 24134m 3.3m/s 3.3m/s
19:00
70% 1.7°C 0mm 45% 0cm 11° 13°C 0mm 0.84kPa 24135m 5.3m/s 2.8m/s
20:00
74% 1.2°C 0mm 58% 0cm -0.83° 9°C 0mm 0.48kPa 24134m 3.4m/s 2.1m/s
21:00
82% 0.5°C 0mm 63% 0cm -13° 7.2°C 0mm 0.38kPa 24135m 1.6m/s 1.7m/s
22:00
91% 0.1°C 0mm 65% 0cm -24° 6.2°C 0mm 0.33kPa 24135m 1.2m/s 1.3m/s
23:00
99% -0.2°C 0mm 66% 0cm -34° 5.6°C 0mm 0.31kPa 24135m 0.81m/s 0.84m/s
Fri, Apr 10 Sunrise 07:04 Sunset 19:59
24:00
99% -0.7°C 0mm 66% 0cm -41° 5.1°C 0mm 0.29kPa 24134m 0.5m/s 0.47m/s
01:00
100% -1°C 0mm 66% 0cm -46° 4.8°C 0mm 0.29kPa 24135m 0.42m/s 0.18m/s
02:00
100% -1.2°C 0mm 67% 0cm -46° 4.4°C 0mm 0.28kPa 24135m 0.41m/s 0.32m/s
03:00
100% -1.5°C 0mm 67% 0cm -42° 4.2°C 0mm 0.27kPa 24134m 0.51m/s 0.4m/s
04:00
100% -1.7°C 0mm 67% 0cm -34° 3.9°C 0mm 0.27kPa 24134m 0.3m/s 0.14m/s
05:00
100% -1.8°C 0mm 67% 0cm -24° 3.7°C 0mm 0.26kPa 24135m 0.51m/s 0.44m/s
06:00
100% -2°C 0mm 68% 0cm -13° 3.4°C 0mm 0.25kPa 24135m 0.6m/s 0.6m/s
07:00
100% -2°C 0mm 69% 0cm -1.5° 3.1°C 0mm 0.24kPa 24135m 0.82m/s 0.86m/s
08:00
100% -1.2°C 0mm 63% 0cm 11° 5.2°C 0mm 0.33kPa 24135m 0.62m/s 0.62m/s
09:00
100% -0.6°C 0mm 49% 0cm 23° 9.5°C 0mm 0.6kPa 24135m 0.92m/s 0.79m/s
10:00
99% -0.2°C 0mm 40% 0cm 35° 13°C 0mm 0.91kPa 24134m 1.1m/s 0.9m/s
11:00
99% 0.3°C 0mm 33% 0cm 46° 16°C 0mm 1.2kPa 24135m 0.92m/s 0.51m/s
12:00
99% 0.8°C 0mm 29% 0cm 55° 19°C 0mm 1.6kPa 24134m 1m/s 0.44m/s
13:00
99% 1.3°C 0mm 27% 0cm 62° 21°C 0mm 1.8kPa 24135m 0.92m/s 0.31m/s
14:00
99% 1.5°C 0mm 25% 0cm 62° 22°C 0mm 2kPa 24134m 1.2m/s 0.28m/s
15:00
99% 1.5°C 0mm 25% 0cm 56° 23°C 0mm 2.1kPa 24135m 1m/s 0.18m/s
16:00
99% 1.3°C 0mm 24% 0cm 46° 23°C 0mm 2.1kPa 24135m 1.3m/s 0.31m/s
17:00
99% 1.4°C 0mm 25% 0cm 35° 22°C 0mm 2kPa 24134m 1.6m/s 0.67m/s
18:00
99% 2.5°C 0mm 29% 0cm 23° 21°C 0mm 1.8kPa 24135m 1.2m/s 1.6m/s
19:00
99% 5.6°C 0mm 45% 0cm 11° 18°C 0mm 1.1kPa 24135m 4.8m/s 2.3m/s
20:00
99% 5.1°C 0mm 60% 0cm -0.62° 13°C 0mm 0.58kPa 24134m 0.91m/s 0.92m/s
21:00
93% 4.7°C 0mm 65% 0cm -13° 11°C 0mm 0.45kPa 24135m 0.61m/s 0.44m/s
22:00
87% 4.7°C 0mm 69% 0cm -24° 10°C 0mm 0.38kPa 24134m 0.6m/s 0.49m/s
23:00
81% 5.1°C 0mm 74% 0cm -33° 9.4°C 0mm 0.31kPa 24135m 0.91m/s 0.95m/s
Sat, Apr 11 Sunrise 07:02 Sunset 19:59
24:00
80% 5.8°C 0mm 81% 0cm -41° 9°C 0mm 0.22kPa 24134m 1.2m/s 1.3m/s
01:00
78% 6.6°C 0mm 88% 0cm -45° 8.5°C 0mm 0.13kPa 24135m 1m/s 1.1m/s
02:00
77% 6.9°C 0mm 91% 0cm -46° 8.3°C 0mm 0.1kPa 24135m 1.1m/s 1.3m/s
03:00
73% 7°C 0mm 93% 0cm -41° 8.1°C 0mm 0.08kPa 24134m 1.2m/s 1.3m/s
04:00
69% 6.8°C 0mm 93% 0cm -34° 7.9°C 0mm 0.08kPa 24134m 1.4m/s 1.5m/s
05:00
65% 6.5°C 0mm 93% 0cm -24° 7.6°C 0mm 0.07kPa 24134m 1.3m/s 1.5m/s
06:00
68% 6.2°C 0mm 93% 0cm -13° 7.4°C 0mm 0.07kPa 24135m 1.5m/s 1.7m/s
07:00
71% 6°C 0mm 92% 0cm -1.1° 7.2°C 0mm 0.08kPa 24135m 1.6m/s 1.8m/s
08:00
74% 6°C 0mm 83% 0cm 11° 8.8°C 0mm 0.19kPa 24134m 2.1m/s 1.5m/s
09:00
75% 7.2°C 0mm 65% 0cm 23° 14°C 0mm 0.56kPa 24134m 1.8m/s 1.2m/s
10:00
76% 7.1°C 0mm 46% 0cm 35° 19°C 0mm 1.2kPa 24135m 1.4m/s 0.78m/s
11:00
77% 4.3°C 0mm 28% 0cm 46° 24°C 0mm 2.1kPa 24135m 1m/s 0.4m/s
12:00
79% 6.2°C 0mm 38% 0cm 56° 21°C 0mm 1.5kPa 24135m 1.3m/s 0.86m/s
13:00
82% 7°C 0mm 48% 0cm 62° 18°C 0mm 1.1kPa 24135m 1.6m/s 1.3m/s
14:00
84% 7.1°C 0mm 58% 0cm 62° 15°C 0mm 0.72kPa 24135m 1.8m/s 1.8m/s
15:00
75% 6.8°C 0mm 61% 0cm 56° 14°C 0mm 0.62kPa 24135m 1.4m/s 1.3m/s
16:00
65% 6.5°C 0mm 64% 0cm 47° 13°C 0mm 0.54kPa 24135m 0.96m/s 0.7m/s
17:00
56% 6.2°C 0mm 67% 0cm 35° 12°C 0mm 0.46kPa 24135m 0.54m/s 0.16m/s
18:00
53% 6°C 0mm 68% 0cm 24° 12°C 0mm 0.44kPa 24135m 0.63m/s 0.38m/s
19:00
51% 5.9°C 0mm 69% 0cm 11° 11°C 0mm 0.42kPa 24135m 0.72m/s 0.61m/s
20:00
48% 5.7°C 0mm 70% 0cm -0.38° 11°C 0mm 0.4kPa 24135m 0.81m/s 0.83m/s
21:00
52% 5.7°C 0mm 72% 0cm -12° 11°C 0mm 0.36kPa 24135m 0.95m/s 0.99m/s
22:00
57% 5.7°C 0mm 74% 0cm -23° 10°C 0mm 0.33kPa 24135m 1.1m/s 1.2m/s
23:00
61% 5.7°C 0mm 76% 0cm -33° 9.8°C 0mm 0.3kPa 24135m 1.2m/s 1.3m/s
Sun, Apr 12 Sunrise 07:01
24:00
63% 6.3°C 0mm 76% 0cm -41° 10°C 0mm 0.29kPa 24135m 1.1m/s 1.1m/s
01:00
66% 6.8°C 0mm 77% 0cm -45° 11°C 0mm 0.29kPa 24135m 0.92m/s 0.92m/s
02:00
68% 7.4°C 0mm 78% 0cm -45° 11°C 0mm 0.29kPa 24135m 0.76m/s 0.72m/s
03:00
73% 7.8°C 0mm 67% 0cm -41° 14°C 0mm 0.52kPa 24135m 2.3m/s 1.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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