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Rule Fog Hunter

Franconia - Fog Hunter - New England, USA

Franconia, New Hampshire, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread9.9°C
Visibility24135 (Clear)
Relative Humidity52%
Wind Speed4.2m/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
Franconia
Tomorrow · 21:00–05:00 · 8h window
High confidence
83%
🌫️Fog Probability78.4-88.6%
Dewpoint Spread: 0.3°C
Visibility: 21271 (Clear)
Relative Humidity: 97%
Wind Speed: 1.2m/s (calm conditions)
fog weather icon
Dense Fog at Sunrise
Franconia
Mon, Apr 20 · 05:00–07:00
🌫️Fog Probability:88.6-91.1%
High
fog weather icon
Moderate Fog at Dusk
Franconia
Wed, Apr 22 · 20:00–21:00
🌫️Fog Probability:77.1%
Medium
fog weather icon
Dense Fog
Franconia
Wed, Apr 22 · 21:00–24:00
🌫️Fog Probability:77.1-97.3%
High
fog weather icon
Moderate Fog
Franconia
Thu, Apr 23 · 22:00–24:00
🌫️Fog Probability:61.4%
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the maritime fog and mountain mist that define New England's atmospheric photography. We combine ocean temperature, dewpoint, and topography to predict when coastal fog banks and mountain valley mist will create moody, quintessentially New England conditions.

New England sits where cold Atlantic waters meet the North American continent, creating persistent fog conditions especially during autumn. The region's mountains—from the White Mountains of New Hampshire to the Green Mountains of Vermont—also generate valley fog that transforms familiar scenes into ethereal compositions.

What makes New England fog photography exceptional:

  • Maritime fog - Cold Atlantic waters generate thick fog banks that roll inland, especially in Maine and coastal Massachusetts
  • White Mountains valleys - Notches and valleys trap morning mist that burns off by mid-morning, creating dramatic reveal moments
  • Covered bridge fog - Vermont and New Hampshire's iconic covered bridges emerge from fog like scenes from another century
  • Acadia coastal mist - Rocky Maine coast where fog meets granite cliffs and crashing waves

Best conditions occur September through October when warm land meets cooling air. Coastal fog can persist all day, while mountain valley fog typically burns off by late morning. Classic locations include Franconia Notch, Smugglers' Notch, and Mount Desert Island.

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72-hour requirements breakdown

What passed or failed, hour by hour
10matching 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%
05:0039%
06:0043%
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%
03:000%
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%
21:0089%
22:0078%
23:0084%
Mon, Apr 20
24:0089%
01:0089%
02:0084%
03:0089%
04:0089%
05:0089%
06:0091%
07:0052%
08:0035%
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 05:58 Sunset 19:34
15:00
1% 6.2°C 0mm 52% 0cm 46° 16°C 0mm 0.87kPa 24135m 6.6m/s 4.2m/s
16:00
1% 6.2°C 0mm 56% 0cm 37° 15°C 0mm 0.74kPa 24134m 5.9m/s 3.8m/s
17:00
1% 6.2°C 0mm 61% 0cm 27° 13°C 0mm 0.6kPa 24135m 6.2m/s 4.1m/s
18:00
1% 5.6°C 0mm 64% 0cm 16° 12°C 0mm 0.51kPa 24135m 5.4m/s 3.2m/s
19:00
0% 5.2°C 0mm 71% 0cm 5.4° 10°C 0mm 0.37kPa 24134m 4.6m/s 2.5m/s
20:00
0% 4.1°C 0mm 79% 0cm -5° 7.6°C 0mm 0.22kPa 24135m 4.1m/s 2.7m/s
21:00
0% 3.5°C 0mm 81% 0cm -15° 6.4°C 0mm 0.18kPa 24135m 3.7m/s 2.5m/s
22:00
0% 3.6°C 0mm 83% 0cm -23° 6.3°C 0mm 0.16kPa 24134m 3.7m/s 2.5m/s
23:00
0% 3.9°C 0mm 86% 0cm -30° 6.1°C 0mm 0.13kPa 24134m 3.5m/s 2.4m/s
Sun, Apr 19 Sunrise 05:56 Sunset 19:36
24:00
0% 4.1°C 0mm 86% 0cm -34° 6.3°C 0mm 0.14kPa 24135m 3m/s 2m/s
01:00
0% 4.1°C 0mm 88% 0cm -34° 6°C 0mm 0.12kPa 24134m 3.2m/s 2.1m/s
02:00
0% 4.4°C 0.69mm 88% 0cm -32° 6.2°C 0.13mm 0.11kPa 16271m 3.9m/s 2.3m/s
03:00
0% 5.6°C 0.52mm 92% 0cm -27° 6.8°C 0.5mm 0.08kPa 18042m 4.1m/s 2m/s
04:00
0% 6.2°C 0.07mm 95% 0cm -19° 6.9°C 1.1mm 0.05kPa 23939m 3.6m/s 1.8m/s
05:00
0% 6.4°C 0.31mm 96% 0cm -10° 7°C 1.8mm 0.04kPa 10455m 3.6m/s 2m/s
06:00
0% 6.4°C 0.47mm 96% 0cm 0.27° 7°C 2.1mm 0.04kPa 9130m 3.7m/s 1.9m/s
07:00
0% 6.5°C 1.3mm 97% 0cm 10° 7°C 3mm 0.03kPa 4006m 2.5m/s 1.2m/s
08:00
0% 6.5°C 0.89mm 98% 0cm 21° 6.9°C 4.8mm 0.02kPa 3368m 2m/s 1.1m/s
09:00
0% 5.4°C 3.2mm 97% 0cm 32° 5.7°C 4.1mm 0.02kPa 1048m 6.5m/s 3.2m/s
10:00
0% 3.6°C 1.9mm 97% 0cm 42° 4.1°C 6.1mm 0.03kPa 3912m 6m/s 2.3m/s
11:00
0% 2.6°C 1.6mm 98% 0cm 50° 2.9°C 8.3mm 0.02kPa 350m 5.7m/s 2.2m/s
12:00
0% 1.4°C 3.8mm 100% 3.8cm 56° 1.5°C 11mm 0kPa 40m 2.4m/s 0.86m/s
13:00
0% 1.2°C 1.5mm 99% 1.5cm 57° 1.3°C 14mm 0kPa 30m 4.3m/s 2m/s
14:00
0% 0.5°C 1.3mm 99% 1.3cm 53° 0.63°C 16mm 0.01kPa 52m 6.4m/s 2.1m/s
15:00
0% 0.1°C 1.6mm 98% 1.7cm 46° 0.34°C 1.6mm 0.01kPa 121m 6.5m/s 2.8m/s
16:00
0% -0.4°C 0.38mm 94% 0.45cm 37° 0.42°C 2.5mm 0.04kPa 1157m 6.8m/s 3m/s
17:00
0% -0.2°C 0.32mm 90% 0.39cm 27° 1.3°C 2.8mm 0.07kPa 3783m 7.2m/s 3.2m/s
18:00
0% 0.4°C 0.01mm 91% 0.12cm 16° 1.6°C 3.1mm 0.06kPa 11968m 7.6m/s 2.8m/s
19:00
0% -0.3°C 0mm 91% 0.1cm 5.6° 1.1°C 3.2mm 0.06kPa 14077m 5.5m/s 2.1m/s
20:00
0% -0.9°C 0.02mm 96% 0.04cm -4.8° -0.32°C 3.3mm 0.03kPa 12029m 2.3m/s 0.82m/s
21:00
20% -2°C 0mm 97% 0.02cm -14° -1.7°C 0mm 0.01kPa 21271m 1m/s 1.2m/s
22:00
40% -2.2°C 0mm 96% 0cm -23° -1.7°C 0mm 0.02kPa 24135m 1.4m/s 1.6m/s
23:00
60% -2.8°C 0mm 97% 0cm -29° -2.4°C 0mm 0.02kPa 24135m 2m/s 2m/s
Mon, Apr 20 Sunrise 05:55 Sunset 19:37
24:00
63% -3.4°C 0mm 97% 0cm -33° -3°C 0mm 0.01kPa 24135m 1.9m/s 1.9m/s
01:00
65% -3.5°C 0mm 97% 0cm -34° -3.1°C 0mm 0.01kPa 24134m 2m/s 2.1m/s
02:00
68% -3.8°C 0mm 97% 0cm -32° -3.4°C 0mm 0.01kPa 23112m 1.5m/s 1.8m/s
03:00
74% -3.8°C 0mm 97% 0cm -26° -3.4°C 0mm 0.01kPa 22977m 1.5m/s 1.7m/s
04:00
80% -4°C 0mm 98% 0cm -19° -3.6°C 0mm 0.01kPa 22915m 1.4m/s 1.7m/s
05:00
86% -3.6°C 0mm 97% 0cm -9.9° -3.2°C 0mm 0.01kPa 20978m 1.7m/s 1.5m/s
06:00
83% -2.9°C 0.08mm 97% 0cm 0.51° -2.5°C 0.06mm 0.01kPa 6387m 2m/s 1.4m/s
07:00
79% -1.6°C 0.05mm 94% 0cm 11° -0.75°C 0.19mm 0.04kPa 6209m 2.4m/s 1.1m/s
08:00
76% -0.8°C 0.54mm 94% 0.95cm 21° -0.05°C 0.56mm 0.03kPa 188m 4m/s 1.8m/s
09:00
59% -1°C 0.83mm 93% 1.2cm 32° 0.02°C 1.2mm 0.04kPa 1170m 5.8m/s 3.5m/s
10:00
41% -3.6°C 0.09mm 76% 0cm 42° 0.11°C 1.8mm 0.15kPa 10799m 5.7m/s 3.5m/s
11:00
24% -3.7°C 0mm 68% 0.06cm 50° 1.7°C 1.9mm 0.22kPa 14014m 4.8m/s 3.1m/s
12:00
18% -3.5°C 0mm 67% 0cm 56° 1.9°C 2mm 0.23kPa 22978m 4.8m/s 3.5m/s
13:00
13% -2.9°C 0.01mm 69% 0.32cm 57° 2.2°C 2.2mm 0.22kPa 2281m 5.2m/s 4m/s
14:00
7% -2.3°C 0.05mm 77% 0.42cm 54° 1.3°C 2.6mm 0.16kPa 1877m 6.5m/s 4.6m/s
15:00
7% -3°C 0.03mm 71% 0.24cm 47° 1.7°C 0.38mm 0.2kPa 2912m 6.4m/s 4.6m/s
16:00
8% -3.3°C 0.04mm 70% 0.17cm 37° 1.5°C 0.63mm 0.2kPa 4616m 6.6m/s 4.5m/s
17:00
8% -3.9°C 0mm 66% 0cm 27° 1.6°C 0.75mm 0.23kPa 24134m 6m/s 4.1m/s
18:00
11% -4.1°C 0mm 70% 0cm 16° 0.81°C 0.75mm 0.19kPa 24135m 6m/s 4m/s
19:00
13% -4.8°C 0mm 74% 0cm 5.8° -0.83°C 0.75mm 0.15kPa 24134m 7.9m/s 3.5m/s
20:00
16% -6.2°C 0mm 88% 0cm -4.6° -4.6°C 0.81mm 0.05kPa 24135m 0.62m/s 0.47m/s
21:00
34% -7.2°C 0mm 86% 0cm -14° -5.2°C 0.54mm 0.06kPa 24135m 0.92m/s 0.89m/s
22:00
53% -8.1°C 0mm 83% 0cm -22° -5.8°C 0.27mm 0.07kPa 24135m 1.2m/s 1.3m/s
23:00
71% -9.1°C 0mm 81% 0cm -29° -6.4°C 0mm 0.07kPa 24135m 1.5m/s 1.7m/s
Tue, Apr 21 Sunrise 05:53 Sunset 19:38
24:00
72% -9.1°C 0mm 71% 0cm -33° -4.7°C 0mm 0.12kPa 24135m 1.8m/s 1.6m/s
01:00
73% -9.3°C 0mm 61% 0cm -34° -3°C 0mm 0.19kPa 24135m 2.1m/s 1.4m/s
02:00
74% -9.9°C 0mm 52% 0cm -31° -1.2°C 0mm 0.27kPa 24135m 2.4m/s 1.3m/s
03:00
78% -9.8°C 0mm 47% 0cm -26° 0.07°C 0mm 0.32kPa 24135m 2.3m/s 1.5m/s
04:00
81% -9.8°C 0mm 43% 0cm -19° 1.4°C 0mm 0.38kPa 24135m 2.1m/s 1.7m/s
05:00
85% -9.9°C 0mm 39% 0cm -9.6° 2.7°C 0mm 0.45kPa 24135m 1.9m/s 1.9m/s
06:00
85% -9.2°C 0mm 39% 0cm 0.75° 3.4°C 0mm 0.47kPa 24135m 1.8m/s 2m/s
07:00
85% -8.5°C 0mm 39% 0cm 11° 4.1°C 0mm 0.49kPa 24135m 1.7m/s 2.1m/s
08:00
85% -7.9°C 0mm 40% 0cm 22° 4.7°C 0mm 0.52kPa 24135m 1.5m/s 2.2m/s
09:00
79% -8°C 0mm 39% 0cm 32° 4.7°C 0mm 0.52kPa 24135m 1.9m/s 1.9m/s
10:00
72% -8.2°C 0mm 39% 0cm 42° 4.6°C 0mm 0.52kPa 24135m 2.2m/s 1.7m/s
11:00
66% -8.4°C 0mm 38% 0cm 51° 4.5°C 0mm 0.52kPa 24135m 2.5m/s 1.4m/s
12:00
57% -8.2°C 0mm 43% 0cm 56° 3°C 0mm 0.43kPa 24135m 1.9m/s 1.2m/s
13:00
47% -8.3°C 0mm 48% 0cm 58° 1.5°C 0mm 0.35kPa 24135m 1.2m/s 0.86m/s
14:00
38% -8.4°C 0mm 53% 0cm 54° -0.08°C 0mm 0.28kPa 24135m 0.61m/s 0.57m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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