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Rule Fog Hunter

Brevard - Fog Hunter - Smoky Mountains & Blue Ridge

Brevard, North Carolina, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread0.1°C
Visibility125 (Dense fog)
Relative Humidity99%
Wind Speed0.8m/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
Brevard
Today · 07:00–14:00 · 7h window
High confidence
99%
🌫️Fog Probability89.5-100%
Dewpoint Spread: 0.1°C
Visibility: 78 (Dense fog)
Relative Humidity: 100%
Wind Speed: 1.1m/s (calm conditions)
fog weather icon
Dense Fog
Brevard
Tue, May 26 · 03:00–05:00
🌫️Fog Probability:91.1-100%
High
fog weather icon
Dense Fog at Dawn
Brevard
Tue, May 26 · 05:00–06:00
🌫️Fog Probability:100%
High
fog weather icon
Moderate Fog at Sunrise
Brevard
Tue, May 26 · 06:00–07:00
🌫️Fog Probability:79.7%
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
15matching 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
24:0068%
01:0068%
02:000%
03:00100%
04:00100%
05:00100%
06:00100%
07:00100%
08:00100%
09:0098%
10:0096%
11:0094%
12:0094%
13:0090%
14:0070%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0071%
22:0071%
23:0071%
Mon, May 25
24:0041%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:0059%
10:0042%
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%
03:0091%
04:00100%
05:00100%
06:0080%
07:0073%
08:0048%
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%
23:0055%
Wed, May 27
24:0055%
01:0055%
02:0055%
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 06:21 Sunset 20:34
09:00
0% 15°C 0mm 99% 0cm 30° 15°C 0mm 0.01kPa 125m 1.3m/s 0.84m/s
10:00
0% 15°C 0.01mm 99% 0cm 43° 15°C 0mm 0.02kPa 202m 1.6m/s 1m/s
11:00
0% 16°C 0mm 98% 0cm 55° 16°C 0mm 0.03kPa 148m 2.2m/s 1.2m/s
12:00
0% 16°C 0mm 97% 0cm 66° 17°C 0mm 0.06kPa 120m 2.3m/s 1.4m/s
13:00
0% 17°C 0mm 95% 0cm 74° 17°C 0.06mm 0.09kPa 148m 2.5m/s 1.6m/s
14:00
0% 16°C 0mm 94% 0cm 74° 17°C 0.13mm 0.11kPa 303m 2.5m/s 1.8m/s
15:00
0% 17°C 0mm 93% 0cm 65° 18°C 0mm 0.14kPa 22895m 2.7m/s 1.8m/s
16:00
0% 17°C 0mm 88% 0cm 54° 19°C 0.06mm 0.26kPa 24134m 3m/s 2.1m/s
17:00
0% 16°C 0mm 76% 0cm 42° 21°C 0.13mm 0.58kPa 24135m 4.1m/s 2.6m/s
18:00
0% 16°C 0mm 77% 0cm 29° 20°C 0.25mm 0.56kPa 24134m 4m/s 2.5m/s
19:00
0% 16°C 0mm 78% 0cm 17° 20°C 0.31mm 0.51kPa 24135m 3.4m/s 2.2m/s
20:00
0% 17°C 0mm 90% 0cm 5.8° 18°C 0.31mm 0.22kPa 24135m 3m/s 1.8m/s
21:00
0% 16°C 0mm 98% 0cm -5.2° 16°C 0mm 0.04kPa 24135m 1.2m/s 1.2m/s
22:00
0% 15°C 0mm 98% 0cm -15° 16°C 0mm 0.04kPa 24135m 1.1m/s 1.1m/s
23:00
0% 15°C 0mm 97% 0cm -24° 16°C 0.13mm 0.05kPa 24135m 1.2m/s 1.3m/s
Mon, May 25 Sunrise 06:20 Sunset 20:35
24:00
0% 15°C 0.65mm 98% 0cm -30° 15°C 0.69mm 0.03kPa 14228m 2.2m/s 1.7m/s
01:00
0% 16°C 3.9mm 99% 0cm -33° 16°C 3.1mm 0.01kPa 3260m 1.1m/s 0.92m/s
02:00
0% 16°C 1.1mm 100% 0cm -33° 16°C 5.2mm 0.01kPa 3736m 1.6m/s 1.2m/s
03:00
0% 16°C 4.1mm 100% 0cm -30° 16°C 4.6mm 0.01kPa 363m 0.8m/s 0.6m/s
04:00
0% 16°C 0mm 99% 0cm -23° 16°C 5.4mm 0.02kPa 1675m 1.2m/s 1m/s
05:00
0% 16°C 0mm 100% 0cm -15° 16°C 5.4mm 0.01kPa 215m 0.9m/s 0.55m/s
06:00
0% 16°C 0mm 99% 0cm -4.4° 16°C 5.4mm 0.01kPa 365m 2.1m/s 1.3m/s
07:00
0% 16°C 0mm 99% 0cm 6.7° 16°C 5.4mm 0.02kPa 9816m 2.4m/s 1.5m/s
08:00
0% 16°C 0mm 99% 0cm 18° 16°C 5.4mm 0.02kPa 24135m 2.8m/s 1.4m/s
09:00
0% 16°C 0mm 98% 0cm 30° 17°C 0mm 0.03kPa 24134m 3m/s 1.6m/s
10:00
0% 17°C 0mm 95% 0cm 43° 18°C 0mm 0.09kPa 24134m 3.5m/s 1.8m/s
11:00
0% 17°C 0mm 89% 0cm 55° 19°C 0.06mm 0.24kPa 24134m 3.9m/s 2.3m/s
12:00
0% 17°C 0mm 75% 0cm 66° 21°C 0.13mm 0.63kPa 24134m 4.3m/s 2.9m/s
13:00
0% 16°C 0mm 64% 0cm 75° 23°C 0.19mm 1kPa 24135m 4.7m/s 3.1m/s
14:00
0% 15°C 0mm 58% 0cm 74° 24°C 0.25mm 1.2kPa 24134m 4.8m/s 3.4m/s
15:00
0% 16°C 0mm 59% 0cm 65° 24°C 0.13mm 1.2kPa 24135m 4.5m/s 3.1m/s
16:00
0% 16°C 0mm 64% 0cm 54° 24°C 0.38mm 1kPa 18472m 3.9m/s 2.7m/s
17:00
0% 19°C 0mm 87% 0cm 42° 21°C 1.1mm 0.33kPa 7609m 3.5m/s 2.5m/s
18:00
0% 18°C 0.01mm 95% 0cm 30° 19°C 2.1mm 0.11kPa 16399m 2.5m/s 1.9m/s
19:00
0% 19°C 0mm 96% 0cm 18° 19°C 3.2mm 0.1kPa 17224m 2.5m/s 1.6m/s
20:00
0% 18°C 0mm 96% 0cm 18°C 4.9mm 0.08kPa 6666m 2.1m/s 1.8m/s
21:00
0% 17°C 0.39mm 98% 0cm -5.1° 17°C 1.9mm 0.04kPa 6272m 3.3m/s 2.2m/s
22:00
0% 17°C 1.9mm 100% 0cm -15° 17°C 5.1mm 0.01kPa 1147m 3.3m/s 1.6m/s
23:00
0% 17°C 11mm 100% 0cm -24° 17°C 11mm 0kPa 117m 6.7m/s 2.1m/s
Tue, May 26 Sunrise 06:20 Sunset 20:36
24:00
0% 17°C 0.34mm 98% 0cm -30° 17°C 15mm 0.04kPa 12801m 9.6m/s 3m/s
01:00
0% 16°C 0mm 99% 0cm -33° 16°C 16mm 0.02kPa 20934m 2.6m/s 1.7m/s
02:00
0% 16°C 0mm 99% 0cm -33° 16°C 16mm 0.01kPa 20975m 2.8m/s 1.5m/s
03:00
0% 16°C 0mm 100% 0cm -30° 16°C 0.13mm 0.01kPa 3867m 3.7m/s 1.7m/s
04:00
0% 15°C 0mm 100% 0cm -23° 15°C 0.19mm 0.01kPa 1004m 5m/s 2.2m/s
05:00
0% 15°C 0mm 99% 0cm -14° 15°C 0.19mm 0.01kPa 253m 4.9m/s 2.2m/s
06:00
0% 15°C 0mm 99% 0cm -4.3° 15°C 0.19mm 0.02kPa 9718m 3.3m/s 1.9m/s
07:00
0% 15°C 0mm 98% 0cm 6.8° 15°C 0.19mm 0.03kPa 22887m 3m/s 1.9m/s
08:00
0% 16°C 0mm 96% 0cm 18° 17°C 0.19mm 0.08kPa 22915m 2.4m/s 1.4m/s
09:00
0% 16°C 0mm 90% 0cm 30° 18°C 0mm 0.21kPa 24134m 2.2m/s 1.2m/s
10:00
1% 16°C 0mm 76% 0cm 43° 21°C 0mm 0.57kPa 24135m 2.5m/s 1.1m/s
11:00
1% 16°C 0mm 62% 0cm 55° 23°C 0mm 1.1kPa 24135m 3.1m/s 1.5m/s
12:00
1% 15°C 0mm 54% 0cm 66° 25°C 0mm 1.4kPa 14954m 3.7m/s 2.1m/s
13:00
0% 18°C 0mm 70% 0cm 75° 24°C 0.88mm 0.86kPa 8094m 3.2m/s 2.5m/s
14:00
0% 19°C 0mm 79% 0cm 74° 23°C 1.9mm 0.59kPa 7653m 2.9m/s 2.4m/s
15:00
1% 19°C 0.04mm 85% 0cm 65° 22°C 2.3mm 0.38kPa 13147m 4.1m/s 2.3m/s
16:00
2% 19°C 0.08mm 92% 0cm 54° 21°C 2.6mm 0.2kPa 18641m 5.4m/s 2.2m/s
17:00
3% 20°C 0.12mm 98% 0cm 42° 20°C 3mm 0.04kPa 24135m 6.6m/s 2.1m/s
18:00
2% 19°C 0.08mm 98% 0cm 30° 20°C 3mm 0.04kPa 24135m 4.8m/s 1.9m/s
19:00
1% 19°C 0.04mm 98% 0cm 18° 20°C 3mm 0.05kPa 24135m 3.1m/s 1.6m/s
20:00
0% 19°C 0mm 97% 0cm 6.1° 19°C 3.1mm 0.06kPa 24135m 1.3m/s 1.3m/s
21:00
0% 19°C 0mm 97% 0cm -5° 19°C 2mm 0.07kPa 24135m 1.2m/s 1.2m/s
22:00
0% 19°C 0mm 97% 0cm -15° 19°C 1mm 0.07kPa 24135m 1.2m/s 1.2m/s
23:00
0% 19°C 0mm 97% 0cm -23° 19°C 0mm 0.07kPa 24135m 1.1m/s 1.1m/s
Wed, May 27 Sunrise 06:19 Sunset 20:36
24:00
0% 19°C 0mm 97% 0cm -30° 19°C 0mm 0.08kPa 24135m 1.8m/s 1.1m/s
01:00
0% 19°C 0mm 96% 0cm -33° 19°C 0mm 0.08kPa 24135m 2.5m/s 1.2m/s
02:00
0% 19°C 0mm 96% 0cm -33° 20°C 0mm 0.08kPa 24135m 3.1m/s 1.2m/s
03:00
1% 19°C 0mm 92% 0cm -29° 20°C 0.04mm 0.18kPa 24135m 4m/s 1.8m/s
04:00
1% 19°C 0mm 89% 0cm -23° 21°C 0.08mm 0.29kPa 24135m 4.8m/s 2.3m/s
05:00
2% 19°C 0mm 85% 0cm -14° 22°C 0.13mm 0.41kPa 24135m 5.6m/s 2.9m/s
06:00
1% 19°C 0.01mm 86% 0cm -4.3° 22°C 0.27mm 0.38kPa 24135m 5.7m/s 2.7m/s
07:00
1% 19°C 0.03mm 86% 0cm 6.8° 22°C 0.42mm 0.36kPa 24135m 5.9m/s 2.5m/s
08:00
0% 19°C 0.04mm 87% 0cm 18° 22°C 0.56mm 0.33kPa 24135m 6m/s 2.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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