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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 Spread21.6°C
Visibility24134 (Clear)
Relative Humidity24%
Wind Speed0.9m/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
Moderate Fog
Asheville
Sat, Apr 25 · 17:00–19:00 · 2h window
Medium confidence
60%
🌫️Fog Probability74.8-77.8%
Dewpoint Spread: 0.3°C
Visibility: 24135 (Clear)
Relative Humidity: 99%
Wind Speed: 1.4m/s (calm conditions)
fog weather icon
Moderate Fog at Sunset
Asheville
Sat, Apr 25 · 19:00–21:00
🌫️Fog Probability:84.8%
High
fog weather icon
Moderate Fog
Asheville
Sat, Apr 25 · 21:00–01:00
🌫️Fog Probability:74.6-84.8%
Medium
fog weather icon
Dense Fog
Asheville
Sun, Apr 26 · 21:00–24:00
🌫️Fog Probability:62.7-88.6%
Medium
fog weather icon
Moderate Fog at Sunset
Asheville
Tue, Apr 28 · 19:00–21:00
🌫️Fog Probability:62.7-79.7%
Low
fog weather icon
Moderate Fog
Asheville
Tue, Apr 28 · 21:00–01:00
🌫️Fog Probability:62.7-84.8%
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
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 60.0%
Mon, Apr 20
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, Apr 21
24:000%
01:000%
02:000%
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15:000%
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21:000%
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Wed, Apr 22
24:000%
01:000%
02:000%
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06:000%
07:000%
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Thu, Apr 23
24:000%
01:000%
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Fri, Apr 24
24:000%
01:000%
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06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
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
Tue, Apr 21 Sunrise 06:50 Sunset 20:08
15:00
69% 0.6°C 0mm 24% 0cm 59° 22°C 0mm 2kPa 24134m 4.4m/s 0.91m/s
16:00
39% 1.4°C 0mm 25% 0cm 49° 22°C 0mm 2kPa 24134m 4.1m/s 1.1m/s
17:00
10% 1.9°C 0mm 28% 0cm 37° 21°C 0mm 1.8kPa 24134m 3m/s 2.4m/s
18:00
7% 2.9°C 0mm 33% 0cm 25° 20°C 0mm 1.5kPa 24134m 3.3m/s 3.5m/s
19:00
4% 4.4°C 0mm 43% 0cm 13° 17°C 0mm 1.1kPa 24135m 7m/s 3.5m/s
20:00
1% 4.2°C 0mm 56% 0cm 1.2° 13°C 0mm 0.64kPa 24134m 1.3m/s 1.4m/s
21:00
3% 3.7°C 0mm 61% 0cm -11° 11°C 0mm 0.5kPa 24135m 1.2m/s 1.1m/s
22:00
6% 3.7°C 0mm 66% 0cm -21° 9.8°C 0mm 0.42kPa 24134m 1m/s 0.86m/s
23:00
8% 3.8°C 0mm 68% 0cm -31° 9.3°C 0mm 0.37kPa 24135m 0.61m/s 0.45m/s
Wed, Apr 22 Sunrise 06:48 Sunset 20:09
24:00
5% 3.7°C 0mm 69% 0cm -38° 9°C 0mm 0.35kPa 24134m 0.5m/s 0.26m/s
01:00
3% 3.5°C 0mm 70% 0cm -42° 8.8°C 0mm 0.35kPa 24135m 0.5m/s 0.45m/s
02:00
0% 3.5°C 0mm 70% 0cm -42° 8.7°C 0mm 0.34kPa 24134m 0.6m/s 0.51m/s
03:00
0% 3.5°C 0mm 71% 0cm -38° 8.5°C 0mm 0.33kPa 24134m 0.9m/s 0.99m/s
04:00
1% 3.6°C 0mm 74% 0cm -30° 8°C 0mm 0.28kPa 24134m 0.8m/s 0.76m/s
05:00
1% 3.6°C 0mm 77% 0cm -21° 7.3°C 0mm 0.23kPa 24135m 0.6m/s 0.49m/s
06:00
4% 3.6°C 0mm 78% 0cm -10° 7.1°C 0mm 0.22kPa 24134m 0.72m/s 0.74m/s
07:00
7% 3.6°C 0mm 79% 0cm 1.7° 7°C 0mm 0.21kPa 24134m 0.8m/s 0.82m/s
08:00
10% 4.5°C 0mm 68% 0cm 13° 10°C 0mm 0.39kPa 24135m 1.1m/s 0.97m/s
09:00
37% 4.9°C 0mm 54% 0cm 26° 14°C 0mm 0.73kPa 24135m 2m/s 1.2m/s
10:00
65% 5.2°C 0mm 44% 0cm 38° 17°C 0mm 1.1kPa 24135m 4.2m/s 1.6m/s
11:00
92% 4.5°C 0mm 36% 0cm 49° 20°C 0mm 1.5kPa 24135m 5.9m/s 2.6m/s
12:00
94% 2.4°C 0mm 28% 0cm 59° 22°C 0mm 1.9kPa 24135m 5.7m/s 3.1m/s
13:00
95% 1.4°C 0mm 24% 0cm 66° 23°C 0mm 2.1kPa 24134m 5.5m/s 3.9m/s
14:00
97% 1.6°C 0mm 23% 0cm 66° 24°C 0mm 2.2kPa 24134m 5.7m/s 3.9m/s
15:00
83% 1.7°C 0mm 23% 0cm 59° 24°C 0mm 2.3kPa 24134m 5.8m/s 4m/s
16:00
68% 1.9°C 0mm 24% 0cm 49° 24°C 0mm 2.3kPa 24134m 5.8m/s 4.3m/s
17:00
54% 2.9°C 0mm 27% 0cm 37° 23°C 0mm 2.1kPa 24135m 5.7m/s 4.8m/s
18:00
49% 5°C 0mm 34% 0cm 25° 22°C 0mm 1.7kPa 24135m 6.2m/s 5.1m/s
19:00
44% 5.7°C 0mm 41% 0cm 13° 19°C 0mm 1.3kPa 24135m 8.4m/s 4.6m/s
20:00
39% 5.9°C 0mm 51% 0cm 1.4° 16°C 0mm 0.89kPa 24134m 7.6m/s 2.6m/s
21:00
44% 5.6°C 0mm 62% 0cm -10° 13°C 0mm 0.56kPa 24135m 1m/s 0.98m/s
22:00
49% 5.5°C 0mm 66% 0cm -21° 12°C 0mm 0.47kPa 24135m 0.94m/s 0.93m/s
23:00
54% 5.4°C 0mm 69% 0cm -30° 11°C 0mm 0.41kPa 24135m 1.2m/s 1.3m/s
Thu, Apr 23 Sunrise 06:47 Sunset 20:09
24:00
57% 5.3°C 0mm 72% 0cm -38° 10°C 0mm 0.34kPa 24135m 1.4m/s 1.5m/s
01:00
60% 5.1°C 0mm 74% 0cm -41° 9.5°C 0mm 0.31kPa 24135m 1.4m/s 1.5m/s
02:00
63% 5.1°C 0mm 76% 0cm -41° 9.1°C 0mm 0.28kPa 24135m 1.3m/s 1.4m/s
03:00
71% 5.1°C 0mm 77% 0cm -37° 8.8°C 0mm 0.26kPa 24135m 1.3m/s 1.4m/s
04:00
78% 5.2°C 0mm 79% 0cm -30° 8.6°C 0mm 0.23kPa 24134m 1.2m/s 1.4m/s
05:00
86% 5.2°C 0mm 81% 0cm -21° 8.4°C 0mm 0.21kPa 24135m 1.3m/s 1.4m/s
06:00
88% 5.3°C 0mm 82% 0cm -9.9° 8.1°C 0mm 0.19kPa 24135m 1.3m/s 1.4m/s
07:00
89% 5.4°C 0mm 83% 0cm 1.9° 8°C 0mm 0.18kPa 24135m 1.2m/s 1.3m/s
08:00
91% 6.2°C 0mm 73% 0cm 14° 11°C 0mm 0.36kPa 24134m 1.5m/s 1m/s
09:00
94% 6.8°C 0mm 58% 0cm 26° 15°C 0mm 0.72kPa 24135m 1.9m/s 1.3m/s
10:00
97% 7.2°C 0mm 48% 0cm 38° 19°C 0mm 1.1kPa 24135m 2m/s 1.2m/s
11:00
100% 6.6°C 0mm 39% 0cm 49° 21°C 0mm 1.5kPa 24134m 2.4m/s 1.3m/s
12:00
96% 6.1°C 0mm 34% 0cm 60° 23°C 0mm 1.8kPa 24135m 2.9m/s 0.93m/s
13:00
91% 5.8°C 0mm 31% 0cm 66° 24°C 0mm 2.1kPa 24134m 3.5m/s 1.2m/s
14:00
87% 5.4°C 0mm 28% 0cm 66° 26°C 0mm 2.4kPa 24134m 3.3m/s 1m/s
15:00
63% 4.9°C 0mm 29% 0cm 59° 24°C 0mm 2.1kPa 24134m 2.9m/s 2m/s
16:00
38% 5.7°C 0mm 32% 0cm 49° 23°C 0mm 1.9kPa 24134m 2.9m/s 2.2m/s
17:00
14% 7.3°C 0mm 40% 0cm 37° 22°C 0mm 1.6kPa 24134m 4.6m/s 2.5m/s
18:00
13% 7.8°C 0mm 42% 0cm 25° 21°C 0mm 1.5kPa 24135m 4.1m/s 2m/s
19:00
11% 9.3°C 0mm 49% 0cm 13° 20°C 0mm 1.2kPa 24135m 3.3m/s 1.8m/s
20:00
10% 8.5°C 0mm 55% 0cm 1.5° 17°C 0mm 0.89kPa 24135m 2.6m/s 1.6m/s
21:00
13% 8.2°C 0mm 63% 0cm -10° 15°C 0mm 0.63kPa 24135m 2.1m/s 1.4m/s
22:00
16% 7.7°C 0mm 71% 0cm -21° 13°C 0mm 0.42kPa 24135m 1.5m/s 1.3m/s
23:00
19% 6.9°C 0mm 79% 0cm -30° 10°C 0mm 0.26kPa 24135m 1m/s 1.1m/s
Fri, Apr 24 Sunrise 06:46 Sunset 20:10
24:00
19% 7.1°C 0mm 76% 0cm -37° 11°C 0mm 0.31kPa 24135m 0.99m/s 0.97m/s
01:00
19% 7.3°C 0mm 73% 0cm -41° 12°C 0mm 0.37kPa 24135m 0.96m/s 0.84m/s
02:00
19% 7.5°C 0mm 70% 0cm -41° 13°C 0mm 0.43kPa 24135m 0.93m/s 0.71m/s
03:00
22% 8.1°C 0mm 58% 0cm -37° 16°C 0mm 0.77kPa 24135m 1.6m/s 0.77m/s
04:00
26% 7.9°C 0mm 46% 0cm -30° 20°C 0mm 1.2kPa 24135m 2.4m/s 0.83m/s
05:00
29% 6.7°C 0mm 34% 0cm -20° 23°C 0mm 1.9kPa 24135m 3.1m/s 0.89m/s
06:00
33% 7.5°C 0mm 38% 0cm -9.6° 23°C 0mm 1.7kPa 24135m 2.6m/s 0.78m/s
07:00
36% 8.1°C 0mm 42% 0cm 2.2° 22°C 0mm 1.5kPa 24135m 2.2m/s 0.67m/s
08:00
40% 8.6°C 0mm 46% 0cm 14° 21°C 0mm 1.3kPa 24135m 1.7m/s 0.56m/s
09:00
45% 8.5°C 0mm 45% 0cm 26° 21°C 0mm 1.4kPa 24135m 2.6m/s 1.1m/s
10:00
49% 8.3°C 0mm 44% 0cm 38° 21°C 0mm 1.4kPa 24135m 3.5m/s 1.7m/s
11:00
54% 8.1°C 0mm 43% 0cm 50° 21°C 0mm 1.4kPa 24135m 4.3m/s 2.2m/s
12:00
44% 8.7°C 0mm 49% 0cm 60° 20°C 0mm 1.1kPa 24135m 3m/s 1.7m/s
13:00
34% 8.9°C 0mm 56% 0cm 67° 18°C 0mm 0.9kPa 24135m 1.8m/s 1.1m/s
14:00
24% 8.9°C 0mm 62% 0cm 66° 16°C 0mm 0.69kPa 24135m 0.5m/s 0.56m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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