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Rule Fog Hunter

Blowing Rock - Fog Hunter - Smoky Mountains & Blue Ridge

Blowing Rock, North Carolina, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread17.7°C
Visibility24135 (Clear)
Relative Humidity33%
Wind Speed2.1m/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
Moderate Fog
Blowing Rock
Tomorrow · 03:00–04:00 · 1h window
Medium confidence
54%
🌫️Fog Probability69.4%
Dewpoint Spread: 0.5°C
Visibility: 16327 (Clear)
Relative Humidity: 97%
Wind Speed: 2.4m/s (calm conditions)
fog weather icon
Dense Fog
Blowing Rock
Sun, Apr 26 · 22:00–03:00
🌫️Fog Probability:70.7-87.3%
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
1matching hours in the next 86 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 60.0%
Sat, Apr 18
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%
Sun, Apr 19
24:000%
01:000%
02:000%
03:0069%
04:000%
05:0018%
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%
Mon, Apr 20
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%
Tue, Apr 21
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%
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
Sat, Apr 18 Sunrise 06:49 Sunset 20:02
15:00
44% 8.3°C 0mm 33% 0cm 57° 26°C 0mm 2.3kPa 24135m 5.6m/s 2.1m/s
16:00
22% 8.7°C 0mm 34% 0cm 47° 26°C 0mm 2.2kPa 24134m 6.7m/s 3.7m/s
17:00
1% 9.8°C 0mm 39% 0cm 36° 25°C 0mm 1.9kPa 24135m 6.8m/s 4.4m/s
18:00
1% 11°C 0mm 50% 0cm 24° 22°C 0mm 1.3kPa 24135m 8.2m/s 4.1m/s
19:00
0% 12°C 0mm 60% 0cm 12° 20°C 0.13mm 0.91kPa 24134m 5.8m/s 2.4m/s
20:00
0% 14°C 0mm 86% 0cm 0.3° 16°C 1.1mm 0.26kPa 9312m 2m/s 2.1m/s
21:00
0% 14°C 0mm 88% 0cm -12° 16°C 0.69mm 0.22kPa 19250m 1.3m/s 1.2m/s
22:00
0% 13°C 0mm 82% 0cm -22° 17°C 0.94mm 0.34kPa 23889m 8m/s 2.7m/s
23:00
0% 14°C 0mm 90% 0cm -32° 15°C 1mm 0.16kPa 24134m 9.7m/s 3.9m/s
Sun, Apr 19 Sunrise 06:48 Sunset 20:03
24:00
0% 14°C 0.02mm 96% 0cm -39° 14°C 1mm 0.06kPa 24135m 7.8m/s 2.8m/s
01:00
0% 13°C 0mm 97% 0cm -42° 14°C 1mm 0.05kPa 24134m 6.6m/s 2.2m/s
02:00
0% 13°C 0mm 97% 0cm -42° 14°C 1mm 0.05kPa 24135m 7.3m/s 2.4m/s
03:00
0% 13°C 0.06mm 97% 0cm -38° 13°C 0.06mm 0.04kPa 16327m 8m/s 2.4m/s
04:00
0% 9.7°C 0.07mm 95% 0cm -30° 10°C 0.19mm 0.06kPa 1557m 7.9m/s 5.5m/s
05:00
0% 5.4°C 0.04mm 96% 0cm -21° 6.1°C 0.25mm 0.04kPa 10525m 9.5m/s 5.4m/s
06:00
0% 3.5°C 0.04mm 95% 0cm -10° 4.2°C 0.31mm 0.04kPa 8259m 11m/s 5.6m/s
07:00
0% 2.5°C 0.03mm 96% 0cm 1.8° 3°C 0.38mm 0.03kPa 561m 14m/s 6.7m/s
08:00
0% 2°C 0mm 95% 0cm 14° 2.8°C 0.38mm 0.04kPa 24135m 16m/s 8m/s
09:00
0% 1.3°C 0mm 90% 0cm 26° 2.9°C 0mm 0.08kPa 24135m 17m/s 7.8m/s
10:00
0% 0.3°C 0mm 74% 0cm 38° 4.5°C 0mm 0.21kPa 24134m 15m/s 7.2m/s
11:00
0% -2°C 0mm 58% 0cm 49° 5.5°C 0mm 0.38kPa 24134m 16m/s 7.9m/s
12:00
0% -4.2°C 0mm 43% 0cm 59° 7.5°C 0mm 0.59kPa 24135m 15m/s 8m/s
13:00
0% -6.2°C 0mm 33% 0cm 65° 9°C 0mm 0.76kPa 24134m 15m/s 7.7m/s
14:00
0% -6.1°C 0mm 31% 0cm 64° 10°C 0mm 0.88kPa 24135m 14m/s 7.6m/s
15:00
20% -5.9°C 0mm 29% 0cm 57° 11°C 0mm 0.95kPa 24134m 13m/s 7.2m/s
16:00
40% -6.3°C 0mm 28% 0cm 47° 11°C 0mm 0.96kPa 24135m 12m/s 6.8m/s
17:00
60% -6.2°C 0mm 29% 0cm 36° 11°C 0mm 0.92kPa 24135m 11m/s 6.4m/s
18:00
67% -5.3°C 0mm 33% 0cm 24° 10°C 0mm 0.84kPa 24134m 10m/s 5.7m/s
19:00
75% -4.3°C 0mm 39% 0cm 12° 8.9°C 0mm 0.69kPa 24134m 10m/s 4.9m/s
20:00
82% -4.2°C 0mm 47% 0cm 0.44° 6.4°C 0mm 0.51kPa 24135m 9.8m/s 4.4m/s
21:00
88% -3.4°C 0mm 57% 0cm -11° 4.5°C 0mm 0.37kPa 24134m 9.1m/s 3.5m/s
22:00
94% -2.5°C 0mm 63% 0cm -22° 3.8°C 0mm 0.29kPa 24135m 8.8m/s 3.3m/s
23:00
100% -2.2°C 0mm 68% 0cm -31° 3.2°C 0mm 0.25kPa 24135m 8.3m/s 3.1m/s
Mon, Apr 20 Sunrise 06:47 Sunset 20:04
24:00
100% -2°C 0mm 72% 0cm -38° 2.5°C 0mm 0.2kPa 24135m 6m/s 2.5m/s
01:00
99% -2.1°C 0mm 73% 0cm -42° 2.3°C 0mm 0.19kPa 24134m 5.1m/s 2.4m/s
02:00
99% -2.3°C 0mm 72% 0cm -42° 2.1°C 0mm 0.2kPa 24134m 4.2m/s 2.2m/s
03:00
99% -2.7°C 0mm 70% 0cm -37° 2.2°C 0mm 0.21kPa 24135m 4.3m/s 2.3m/s
04:00
100% -3°C 0mm 67% 0cm -30° 2.6°C 0mm 0.24kPa 24135m 7.4m/s 2.6m/s
05:00
100% -3°C 0mm 63% 0cm -21° 3.3°C 0mm 0.28kPa 24134m 14m/s 3.5m/s
06:00
100% -2.8°C 0mm 58% 0cm -9.8° 4.6°C 0mm 0.35kPa 24135m 13m/s 4.8m/s
07:00
100% -2.3°C 0mm 59% 0cm 5°C 0mm 0.35kPa 24134m 14m/s 5.2m/s
08:00
100% -1.7°C 0mm 61% 0cm 14° 5.3°C 0mm 0.35kPa 24135m 15m/s 4.7m/s
09:00
96% -0.9°C 0mm 59% 0cm 26° 6.6°C 0mm 0.4kPa 24134m 15m/s 5.5m/s
10:00
93% 0.4°C 0mm 58% 0cm 38° 8.2°C 0mm 0.46kPa 24135m 16m/s 6.1m/s
11:00
89% 0.8°C 0mm 52% 0cm 49° 10°C 0mm 0.6kPa 24135m 16m/s 5.8m/s
12:00
89% 0.6°C 0mm 47% 0cm 59° 12°C 0mm 0.72kPa 24135m 16m/s 6.7m/s
13:00
89% 1.2°C 0mm 48% 0cm 65° 12°C 0mm 0.73kPa 24135m 15m/s 7.3m/s
14:00
89% 0.7°C 0mm 44% 0cm 64° 13°C 0mm 0.8kPa 24134m 14m/s 7.3m/s
15:00
91% -0.9°C 0mm 39% 0cm 58° 13°C 0mm 0.91kPa 24134m 13m/s 6.8m/s
16:00
92% -2.4°C 0mm 35% 0cm 48° 13°C 0mm 0.94kPa 24134m 12m/s 6.5m/s
17:00
94% -2.9°C 0mm 36% 0cm 36° 12°C 0mm 0.89kPa 24134m 10m/s 5.6m/s
18:00
95% -3.5°C 0mm 36% 0cm 24° 11°C 0mm 0.85kPa 24135m 9.2m/s 4.8m/s
19:00
95% -3°C 0mm 40% 0cm 12° 9.9°C 0mm 0.72kPa 24134m 9m/s 3.7m/s
20:00
96% -3.5°C 0mm 49% 0cm 0.58° 6.3°C 0mm 0.49kPa 24135m 6.7m/s 2.8m/s
21:00
97% -2.9°C 0mm 55% 0cm -11° 5.5°C 0mm 0.41kPa 24135m 4.9m/s 2.3m/s
22:00
99% -2.5°C 0mm 60% 0cm -22° 4.7°C 0mm 0.34kPa 24135m 3m/s 1.8m/s
23:00
100% -2.1°C 0mm 65% 0cm -31° 3.8°C 0mm 0.28kPa 24135m 1.1m/s 1.3m/s
Tue, Apr 21 Sunrise 06:45 Sunset 20:05
24:00
100% -2°C 0mm 62% 0cm -38° 4.6°C 0mm 0.32kPa 24135m 0.92m/s 1m/s
01:00
99% -1.9°C 0mm 59% 0cm -42° 5.4°C 0mm 0.36kPa 24135m 0.72m/s 0.72m/s
02:00
99% -1.8°C 0mm 56% 0cm -41° 6.2°C 0mm 0.41kPa 24135m 0.53m/s 0.44m/s
03:00
99% -1.1°C 0mm 51% 0cm -37° 8.6°C 0mm 0.55kPa 24135m 1m/s 1.1m/s
04:00
100% -0.6°C 0mm 45% 0cm -30° 11°C 0mm 0.73kPa 24135m 1.5m/s 1.7m/s
05:00
100% -0.4°C 0mm 39% 0cm -20° 13°C 0mm 0.94kPa 24135m 2m/s 2.4m/s
06:00
100% 0.4°C 0mm 37% 0cm -9.5° 15°C 0mm 1.1kPa 24135m 2.6m/s 2.6m/s
07:00
99% 1.1°C 0mm 34% 0cm 2.3° 17°C 0mm 1.3kPa 24135m 3.2m/s 2.9m/s
08:00
99% 1.8°C 0mm 32% 0cm 14° 19°C 0mm 1.4kPa 24135m 3.7m/s 3.1m/s
09:00
96% 2.4°C 0mm 33% 0cm 26° 19°C 0mm 1.5kPa 24135m 4.3m/s 3.6m/s
10:00
94% 2.9°C 0mm 33% 0cm 38° 20°C 0mm 1.6kPa 24135m 4.9m/s 4.1m/s
11:00
91% 3.5°C 0mm 33% 0cm 49° 20°C 0mm 1.6kPa 24135m 5.4m/s 4.5m/s
12:00
84% 4.6°C 0mm 41% 0cm 59° 18°C 0mm 1.2kPa 24135m 4.1m/s 3.5m/s
13:00
78% 5.1°C 0mm 49% 0cm 65° 16°C 0mm 0.9kPa 24135m 2.8m/s 2.5m/s
14:00
71% 5.1°C 0mm 58% 0cm 65° 13°C 0mm 0.65kPa 24135m 1.5m/s 1.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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