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Rule Fog Hunter

Bretton Woods - Fog Hunter - New England, USA

Bretton Woods, New Hampshire, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread5.1°C
Visibility12639 (Clear)
Relative Humidity68%
Wind Speed6.8m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York
fog weather icon
Next opportunity
Moderate Fog
Bretton Woods
Mon, Apr 13 · 23:00–24:00 · 1h window
Low confidence
38%
🌫️Fog Probability62.7%
Dewpoint Spread: 0.0°C
Visibility: 1259 (Mist/Haze)
Relative Humidity: 99%
Wind Speed: 1.8m/s (calm conditions)
fog weather icon
Moderate Fog
Bretton Woods
Tue, Apr 14 · 23:00–24:00
🌫️Fog Probability:62.7%
Low
fog weather icon
Dense Fog
Bretton Woods
Thu, Apr 16 · 23:00–24:00
🌫️Fog Probability:97.3%
Medium
fog weather icon
Moderate Fog
Bretton Woods
Fri, Apr 17 · 02:00–03:00
🌫️Fog Probability:61.4%
Low
fog weather icon
Moderate Fog
Bretton Woods
Fri, Apr 17 · 22:00–24:00
🌫️Fog Probability:62.7%
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
3matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Fog Probability
≥ 60.0%
Fri, Apr 10
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0026%
22:000%
23:000%
Sat, Apr 11
24:000%
01:000%
02:000%
03:00100%
04:00100%
05:0053%
06:0045%
07:0030%
08:000%
09:0013%
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 12
24:000%
01:000%
02:000%
03:000%
04:0043%
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%
Mon, Apr 13
24:0021%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:0042%
10:000%
11:000%
12:000%
13:000%
14:000%
15:0017%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:0063%
Tue, Apr 14
24:0057%
01:0055%
02:0054%
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 11 Sunrise 06:09 Sunset 19:25
15:00
0% -3.9°C 0.01mm 68% 0.04cm 44° 1.2°C 0.06mm 0.21kPa 12639m 12m/s 6.8m/s
16:00
0% -4°C 0.01mm 70% 0.04cm 35° 0.94°C 0.06mm 0.2kPa 12222m 12m/s 6.4m/s
17:00
0% -3.5°C 0.01mm 73% 0.05cm 25° 0.85°C 0.13mm 0.18kPa 12416m 12m/s 5.8m/s
18:00
0% -3.5°C 0.01mm 73% 0.07cm 14° 0.83°C 0.19mm 0.18kPa 12034m 12m/s 6m/s
19:00
0% -3.6°C 0mm 78% 0.06cm 3.8° -0.14°C 0.25mm 0.13kPa 11883m 12m/s 5.9m/s
20:00
0% -3.6°C 0mm 84% 0.05cm -6.7° -1.3°C 0.31mm 0.09kPa 12447m 12m/s 5m/s
21:00
1% -3.6°C 0mm 87% 0.05cm -17° -1.7°C 0.06mm 0.07kPa 11691m 11m/s 4.2m/s
22:00
2% -3.8°C 0mm 90% 0.03cm -25° -2.4°C 0.06mm 0.05kPa 11519m 9.6m/s 3.5m/s
23:00
3% -4.2°C 0mm 92% 0.01cm -32° -3°C 0.13mm 0.04kPa 16763m 8.1m/s 3.1m/s
Sun, Apr 12 Sunrise 06:07 Sunset 19:26
24:00
7% -4.7°C 0mm 90% 0cm -36° -3.3°C 0.13mm 0.05kPa 12402m 7.6m/s 2.9m/s
01:00
10% -4.7°C 0mm 87% 0cm -37° -2.9°C 0.13mm 0.06kPa 18796m 7.1m/s 2.8m/s
02:00
14% -4.7°C 0mm 86% 0cm -34° -2.6°C 0.13mm 0.07kPa 24134m 7m/s 2.8m/s
03:00
43% -4.9°C 0mm 92% 0cm -29° -3.8°C 0mm 0.04kPa 24135m 5.3m/s 2.3m/s
04:00
71% -5.1°C 0mm 93% 0cm -21° -4.1°C 0mm 0.03kPa 24135m 4.4m/s 2.1m/s
05:00
100% -5.3°C 0mm 92% 0cm -12° -4.2°C 0mm 0.04kPa 24134m 3.9m/s 1.9m/s
06:00
99% -5.5°C 0mm 91% 0cm -1.9° -4.2°C 0mm 0.04kPa 24135m 3.3m/s 1.8m/s
07:00
97% -5.6°C 0mm 82% 0cm 8.6° -2.9°C 0mm 0.09kPa 24135m 3.7m/s 1.7m/s
08:00
96% -7.2°C 0mm 63% 0cm 19° -1°C 0mm 0.21kPa 24135m 4.1m/s 2.3m/s
09:00
81% -7.5°C 0mm 55% 0cm 30° 0.54°C 0mm 0.29kPa 24135m 2.9m/s 2m/s
10:00
67% -7.4°C 0mm 49% 0cm 40° 2.2°C 0mm 0.37kPa 24135m 2.3m/s 1.9m/s
11:00
52% -7°C 0mm 44% 0cm 48° 4.3°C 0mm 0.47kPa 24135m 1.7m/s 1.9m/s
12:00
40% -6.7°C 0mm 40% 0cm 53° 5.7°C 0mm 0.55kPa 24135m 1.4m/s 1.9m/s
13:00
29% -6.3°C 0mm 38% 0cm 54° 7.1°C 0mm 0.62kPa 24134m 1.1m/s 1.5m/s
14:00
17% -5.9°C 0mm 37% 0cm 51° 8.1°C 0mm 0.68kPa 24134m 1.9m/s 1.3m/s
15:00
11% -6.1°C 0mm 37% 0cm 44° 7.5°C 0mm 0.65kPa 24134m 2.4m/s 1.5m/s
16:00
6% -5.1°C 0.12mm 41% 0.12cm 35° 7.2°C 0mm 0.6kPa 24135m 2.6m/s 1.9m/s
17:00
0% -2.2°C 0.01mm 57% 0cm 25° 5.5°C 0.13mm 0.39kPa 24135m 2.5m/s 1.5m/s
18:00
0% -1.6°C 0mm 62% 0cm 15° 5.1°C 0.13mm 0.34kPa 24135m 3.1m/s 1.5m/s
19:00
0% -1.8°C 0mm 71% 0cm 3°C 0.13mm 0.22kPa 24135m 2.4m/s 2m/s
20:00
0% -2.5°C 0mm 73% 0cm -6.5° 1.8°C 0.13mm 0.19kPa 24135m 4.1m/s 2.9m/s
21:00
0% -2.9°C 0mm 74% 0cm -16° 1.2°C 0mm 0.17kPa 24135m 4.1m/s 2.8m/s
22:00
0% -2.7°C 0mm 75% 0cm -25° 1.3°C 0mm 0.17kPa 24135m 3.8m/s 2.8m/s
23:00
0% -1.6°C 0.33mm 76% 0cm -32° 2.2°C 0.06mm 0.17kPa 23250m 5m/s 2.9m/s
Mon, Apr 13 Sunrise 06:05 Sunset 19:27
24:00
0% 0.6°C 0.53mm 94% 0cm -36° 1.5°C 0.44mm 0.04kPa 16321m 6m/s 3.2m/s
01:00
0% 1°C 1.1mm 96% 0cm -37° 1.6°C 1.3mm 0.03kPa 8536m 6.7m/s 3.7m/s
02:00
0% 0.8°C 1.8mm 97% 0cm -34° 1.2°C 2.8mm 0.02kPa 2011m 6.6m/s 3.5m/s
03:00
0% 0.6°C 1.4mm 97% 0cm -29° 1°C 2.2mm 0.02kPa 2036m 6.9m/s 3.8m/s
04:00
0% 0.6°C 4.1mm 97% 0cm -21° 0.97°C 4.9mm 0.02kPa 901m 7.3m/s 3.7m/s
05:00
0% 0.8°C 2.6mm 97% 0cm -12° 1.2°C 8.4mm 0.02kPa 1375m 7.1m/s 3.8m/s
06:00
0% 1.1°C 1.3mm 98% 0cm -1.6° 1.5°C 10mm 0.02kPa 2103m 6.1m/s 3.3m/s
07:00
0% 1.6°C 0.74mm 98% 0cm 8.9° 1.9°C 11mm 0.01kPa 3596m 6m/s 3.4m/s
08:00
0% 2.7°C 0.58mm 98% 0cm 20° 3°C 12mm 0.02kPa 3724m 5.6m/s 3.2m/s
09:00
0% 3.7°C 0.75mm 98% 0cm 30° 4°C 0.81mm 0.02kPa 3095m 5.1m/s 2.9m/s
10:00
0% 4.6°C 0.47mm 98% 0cm 40° 4.9°C 1.4mm 0.02kPa 5998m 6.2m/s 2.7m/s
11:00
0% 6.5°C 0.65mm 96% 0cm 48° 7.1°C 2.2mm 0.04kPa 14698m 17m/s 3.8m/s
12:00
0% 8.3°C 0.95mm 94% 0cm 54° 9.2°C 3.1mm 0.07kPa 11464m 18m/s 3.5m/s
13:00
0% 9°C 0.91mm 93% 0cm 55° 10°C 3.9mm 0.08kPa 12241m 16m/s 4m/s
14:00
0% 9.3°C 0.27mm 93% 0cm 52° 10°C 4.5mm 0.08kPa 24135m 16m/s 4.4m/s
15:00
0% 9.5°C 0.93mm 96% 0cm 45° 10°C 0.38mm 0.05kPa 12099m 16m/s 3.8m/s
16:00
0% 9.7°C 1.9mm 97% 0cm 36° 10°C 2.1mm 0.04kPa 7383m 16m/s 3.9m/s
17:00
0% 9.6°C 0.36mm 98% 0cm 25° 10°C 3mm 0.03kPa 2511m 14m/s 3.7m/s
18:00
0% 9.8°C 0mm 98% 0cm 15° 10°C 3.1mm 0.02kPa 234m 12m/s 3.2m/s
19:00
0% 9.8°C 0.04mm 98% 0cm 4.2° 10°C 3.1mm 0.03kPa 476m 12m/s 3m/s
20:00
0% 9.5°C 0.34mm 99% 0cm -6.3° 9.6°C 3.4mm 0.01kPa 173m 7.6m/s 2.5m/s
21:00
0% 9.6°C 0.23mm 99% 0cm -16° 9.7°C 2.3mm 0.01kPa 535m 6.1m/s 2.2m/s
22:00
1% 9.7°C 0.13mm 99% 0cm -25° 9.8°C 1.3mm 0.01kPa 897m 4.6m/s 2m/s
23:00
1% 9.9°C 0.02mm 99% 0cm -31° 9.9°C 0.25mm 0.01kPa 1259m 3.1m/s 1.8m/s
Tue, Apr 14 Sunrise 06:04 Sunset 19:28
24:00
1% 9.9°C 0.02mm 99% 0cm -35° 10°C 0.29mm 0.01kPa 6088m 3m/s 1.7m/s
01:00
0% 10°C 0.03mm 99% 0cm -36° 10°C 0.33mm 0.02kPa 10916m 2.8m/s 1.6m/s
02:00
0% 10°C 0.03mm 98% 0cm -34° 10°C 0.38mm 0.02kPa 15744m 2.7m/s 1.5m/s
03:00
0% 11°C 0.02mm 91% 0cm -28° 12°C 0.25mm 0.12kPa 18541m 3m/s 1.6m/s
04:00
0% 11°C 0.01mm 85% 0cm -21° 14°C 0.13mm 0.24kPa 21338m 3.4m/s 1.6m/s
05:00
0% 11°C 0mm 78% 0cm -12° 15°C 0mm 0.38kPa 24135m 3.8m/s 1.6m/s
06:00
0% 12°C 0mm 72% 0cm -1.3° 17°C 0.02mm 0.53kPa 24135m 5.7m/s 2.8m/s
07:00
0% 12°C 0mm 66% 0cm 9.2° 18°C 0.04mm 0.71kPa 24135m 7.6m/s 3.9m/s
08:00
0% 12°C 0mm 60% 0cm 20° 20°C 0.06mm 0.92kPa 24135m 9.5m/s 5.1m/s
09:00
0% 12°C 0.007mm 63% 0cm 30° 20°C 0.04mm 0.84kPa 24135m 10m/s 4.9m/s
10:00
0% 13°C 0.01mm 66% 0cm 40° 20°C 0.02mm 0.77kPa 24135m 11m/s 4.6m/s
11:00
0% 14°C 0.02mm 70% 0cm 48° 20°C 0mm 0.69kPa 24135m 13m/s 4.4m/s
12:00
0% 14°C 0.01mm 77% 0cm 54° 18°C 0.56mm 0.48kPa 21016m 12m/s 4m/s
13:00
0% 15°C 0.007mm 85% 0cm 55° 17°C 1.1mm 0.29kPa 17897m 12m/s 3.5m/s
14:00
0% 15°C 0mm 93% 0cm 52° 16°C 1.7mm 0.13kPa 14779m 12m/s 3.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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