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Rule Fog Hunter

Columbia River Gorge - Fog Hunter - Pacific Northwest

Cascade Locks, Oregon, United States

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread3.5°C
Visibility21031 (Clear)
Relative Humidity79%
Wind Speed5.2m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Los_Angeles
fog weather icon
Next opportunity
Moderate Fog at Sunrise
Columbia River Gorge
Wed, Jun 17 · 05:00–07:00 · 2h window
Low confidence
19%
🌫️Fog Probability80%
Dewpoint Spread: 1.0°C
Visibility: 353 (Fog)
Relative Humidity: 94%
Wind Speed: 2.3m/s (calm conditions)
fog weather icon
Dense Fog
Columbia River Gorge
Wed, Jun 17 · 22:00–24:00
🌫️Fog Probability:79.7-100%
Medium

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the conditions that create the Pacific Northwest's legendary atmospheric photography. We combine fog probability, dewpoint spread, visibility, and wind data to predict when and where fog will form.

The Pacific Northwest's unique geography—where cold ocean currents meet temperate rainforests and volcanic peaks—creates fog conditions unmatched anywhere in North America. From the Hoh Rainforest's ethereal mist to the Columbia River Gorge's valley fog, this region offers year-round fog photography opportunities.

What makes the Pacific Northwest special for fog photography:

  • Marine influence - Cold Pacific currents generate coastal fog that rolls inland through river valleys
  • Rainforest atmosphere - Olympic's temperate rainforest creates perpetual mist and filtered light
  • Temperature inversions - Mountain valleys trap fog below while peaks remain clear
  • Varied terrain - Photograph fog against waterfalls, old-growth forests, sea stacks, and volcanic peaks

Peak fog season runs from late summer through fall, when temperature differentials between land and sea are greatest. Morning fog often burns off by midday, so arrive before sunrise for the most dramatic conditions. The Columbia River Gorge is particularly reliable for valley fog, while coastal locations like Cannon Beach offer fog throughout the year.

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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/Los_Angeles
Fog Probability
≥ 75.0%
Mon, Jun 8
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, Jun 9
24:0040%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:0021%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:0018%
Wed, Jun 10
24:0033%
01:0034%
02:0034%
03:0035%
04:0056%
05:0063%
06:0069%
07:0055%
08:0039%
09:0027%
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%
Thu, Jun 11
24:0055%
01:0055%
02:0055%
03:0055%
04:0055%
05:0055%
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%
Fri, Jun 12
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%
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/Los_Angeles
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, Jun 9 Sunrise 05:18 Sunset 20:56
19:00
0% 6.5°C 0mm 79% 0cm 17° 10°C 0.31mm 0.26kPa 21031m 11m/s 5.2m/s
20:00
0% 6.4°C 0mm 88% 0cm 7.7° 8.4°C 0.44mm 0.14kPa 24053m 10m/s 4.8m/s
21:00
0% 6.4°C 0mm 92% 0cm -1.2° 7.6°C 0.56mm 0.08kPa 24081m 9.8m/s 4m/s
22:00
0% 6.2°C 0mm 94% 0cm -9.2° 7.1°C 0.69mm 0.06kPa 24135m 9.4m/s 3.9m/s
23:00
0% 6.1°C 0.01mm 96% 0cm -15° 6.8°C 0.81mm 0.04kPa 24134m 9.6m/s 3.6m/s
Wed, Jun 10 Sunrise 05:18 Sunset 20:56
24:00
0% 6.1°C 0mm 96% 0cm -20° 6.7°C 0.13mm 0.04kPa 24135m 9.8m/s 3.5m/s
01:00
0% 6.3°C 0mm 97% 0cm -21° 6.6°C 0.25mm 0.03kPa 24135m 9.6m/s 3.5m/s
02:00
0% 6.2°C 0mm 97% 0cm -20° 6.6°C 0.38mm 0.03kPa 24120m 8.8m/s 3.1m/s
03:00
0% 6.1°C 0mm 98% 0cm -17° 6.4°C 0.56mm 0.02kPa 13844m 9.1m/s 2.8m/s
04:00
0% 6°C 0mm 99% 0cm -11° 6.1°C 0.69mm 0.01kPa 2895m 7.6m/s 2.6m/s
05:00
0% 5.9°C 0mm 99% 0cm -3.3° 6.1°C 0.81mm 0.01kPa 1189m 6.3m/s 2.6m/s
06:00
0% 6.1°C 0mm 100% 0cm 5.6° 6.2°C 0.13mm 0kPa 1029m 6.6m/s 2.5m/s
07:00
0% 6.4°C 0mm 99% 0cm 15° 6.5°C 0.25mm 0.01kPa 1041m 5.6m/s 2.5m/s
08:00
0% 6.7°C 0mm 99% 0cm 25° 6.9°C 0.5mm 0.01kPa 3658m 6.8m/s 2.5m/s
09:00
0% 7.1°C 0mm 96% 0cm 36° 7.6°C 0.81mm 0.04kPa 11572m 7m/s 3m/s
10:00
0% 7.5°C 0mm 94% 0cm 46° 8.3°C 1.1mm 0.06kPa 16719m 6.8m/s 3.1m/s
11:00
0% 7.7°C 0mm 95% 0cm 56° 8.4°C 1.4mm 0.05kPa 23750m 6.8m/s 3m/s
12:00
0% 7.2°C 0mm 83% 0cm 64° 10°C 0.25mm 0.21kPa 23700m 6.4m/s 3.4m/s
13:00
0% 5.4°C 0mm 63% 0cm 67° 12°C 0.44mm 0.52kPa 24107m 6.5m/s 3.7m/s
14:00
0% 5.1°C 0mm 58% 0cm 65° 13°C 0.56mm 0.64kPa 24134m 6.8m/s 3.8m/s
15:00
0% 5.4°C 0mm 62% 0cm 58° 12°C 0.63mm 0.55kPa 24134m 6.7m/s 4m/s
16:00
0% 4.1°C 0mm 50% 0cm 49° 14°C 0.69mm 0.8kPa 24135m 6.6m/s 4.3m/s
17:00
0% 4.6°C 0mm 55% 0cm 38° 13°C 0.69mm 0.69kPa 24135m 5.8m/s 3.8m/s
18:00
10% 4.5°C 0mm 55% 0cm 28° 13°C 0mm 0.69kPa 24135m 5m/s 3.9m/s
19:00
21% 4.5°C 0mm 55% 0cm 18° 13°C 0mm 0.7kPa 24134m 4.6m/s 3.4m/s
20:00
31% 4.9°C 0mm 61% 0cm 7.8° 12°C 0mm 0.55kPa 24134m 5.3m/s 2.7m/s
21:00
37% 4.8°C 0mm 80% 0cm -1.1° 8.1°C 0mm 0.22kPa 24134m 1.7m/s 1.9m/s
22:00
44% 4.7°C 0mm 89% 0cm -9.1° 6.4°C 0mm 0.1kPa 24134m 1.2m/s 1.3m/s
23:00
50% 4.5°C 0mm 92% 0cm -15° 5.7°C 0mm 0.07kPa 24134m 1.2m/s 1.3m/s
Thu, Jun 11 Sunrise 05:18 Sunset 20:56
24:00
66% 4.4°C 0mm 95% 0cm -20° 5.2°C 0mm 0.05kPa 24134m 1.1m/s 1.2m/s
01:00
82% 4°C 0mm 95% 0cm -21° 4.7°C 0mm 0.04kPa 24134m 1.1m/s 1.2m/s
02:00
98% 3.7°C 0mm 95% 0cm -20° 4.4°C 0mm 0.04kPa 24134m 0.92m/s 0.96m/s
03:00
99% 3.5°C 0mm 96% 0cm -17° 4.1°C 0mm 0.04kPa 24134m 1m/s 1m/s
04:00
99% 3.4°C 0mm 96% 0cm -11° 4°C 0mm 0.03kPa 24134m 1m/s 1.1m/s
05:00
100% 3.1°C 0mm 96% 0cm -3.2° 3.7°C 0mm 0.03kPa 24134m 1m/s 1m/s
06:00
100% 3.3°C 0mm 94% 0cm 5.6° 4.3°C 0mm 0.05kPa 24134m 0.7m/s 0.77m/s
07:00
100% 4.3°C 0mm 80% 0cm 15° 7.6°C 0mm 0.21kPa 24135m 0.62m/s 0.41m/s
08:00
100% 4.6°C 0mm 63% 0cm 25° 11°C 0mm 0.5kPa 24134m 0.93m/s 0.67m/s
09:00
100% 4.7°C 0mm 52% 0cm 36° 15°C 0mm 0.8kPa 24134m 1.1m/s 0.81m/s
10:00
100% 4.5°C 0mm 43% 0cm 46° 17°C 0mm 1.1kPa 24135m 1.2m/s 1m/s
11:00
100% 3.8°C 0mm 36% 0cm 56° 19°C 0mm 1.4kPa 24135m 1.7m/s 1.5m/s
12:00
100% 3°C 0mm 31% 0cm 64° 21°C 0mm 1.7kPa 24134m 2.1m/s 1.9m/s
13:00
100% 2.4°C 0mm 28% 0cm 67° 22°C 0mm 1.9kPa 24134m 2.7m/s 2.8m/s
14:00
100% 2.6°C 0mm 27% 0cm 65° 23°C 0mm 2kPa 24134m 3.3m/s 3.4m/s
15:00
100% 3°C 0mm 28% 0cm 58° 23°C 0mm 2kPa 24135m 3.5m/s 3.3m/s
16:00
100% 3.7°C 0mm 29% 0cm 49° 23°C 0mm 1.9kPa 24134m 4.2m/s 3.7m/s
17:00
100% 3.9°C 0mm 30% 0cm 38° 22°C 0mm 1.9kPa 24134m 4.9m/s 3.9m/s
18:00
100% 4.1°C 0mm 32% 0cm 28° 21°C 0mm 1.7kPa 24134m 5.4m/s 4.2m/s
19:00
100% 5.7°C 0mm 40% 0cm 18° 20°C 0mm 1.4kPa 24134m 5.2m/s 3.3m/s
20:00
100% 8°C 0mm 57% 0cm 7.9° 16°C 0mm 0.79kPa 24134m 1.7m/s 2m/s
21:00
100% 7°C 0mm 68% 0cm -1° 13°C 0mm 0.48kPa 24135m 1.6m/s 1.9m/s
22:00
100% 6.7°C 0mm 74% 0cm -9.1° 11°C 0mm 0.35kPa 24135m 1.7m/s 1.9m/s
23:00
100% 6.5°C 0mm 78% 0cm -15° 10°C 0mm 0.28kPa 24134m 1.7m/s 1.9m/s
Fri, Jun 12 Sunrise 05:18 Sunset 20:57
24:00
100% 6.4°C 0mm 82% 0cm -19° 9.3°C 0mm 0.21kPa 24135m 1.7m/s 1.8m/s
01:00
100% 6.4°C 0mm 86% 0cm -21° 8.6°C 0mm 0.15kPa 24135m 1.6m/s 1.9m/s
02:00
100% 6.2°C 0mm 89% 0cm -20° 7.9°C 0mm 0.11kPa 24134m 1.6m/s 1.9m/s
03:00
100% 6.1°C 0mm 92% 0cm -17° 7.4°C 0mm 0.09kPa 24135m 1.6m/s 1.9m/s
04:00
100% 5.8°C 0mm 92% 0cm -11° 7°C 0mm 0.08kPa 24135m 1.7m/s 2m/s
05:00
100% 5.5°C 0mm 93% 0cm -3.2° 6.6°C 0mm 0.07kPa 24134m 1.6m/s 1.9m/s
06:00
100% 6.4°C 0mm 74% 0cm 5.6° 11°C 0mm 0.34kPa 24134m 2.5m/s 2.3m/s
07:00
100% 6°C 0mm 54% 0cm 15° 15°C 0mm 0.78kPa 24135m 3.4m/s 2.8m/s
08:00
100% 3.6°C 0mm 35% 0cm 25° 19°C 0mm 1.5kPa 24135m 4.3m/s 3.3m/s
09:00
100% 3.9°C 0mm 35% 0cm 36° 20°C 0mm 1.5kPa 24135m 4.7m/s 3.4m/s
10:00
100% 4.3°C 0mm 36% 0cm 46° 20°C 0mm 1.5kPa 24135m 5m/s 3.5m/s
11:00
100% 4.6°C 0mm 36% 0cm 56° 20°C 0mm 1.5kPa 24135m 5.3m/s 3.5m/s
12:00
100% 6.6°C 0mm 45% 0cm 64° 19°C 0mm 1.2kPa 24135m 4.5m/s 3m/s
13:00
100% 7.8°C 0mm 55% 0cm 67° 17°C 0mm 0.88kPa 24135m 3.7m/s 2.5m/s
14:00
100% 8.6°C 0mm 64% 0cm 65° 15°C 0mm 0.62kPa 24135m 2.9m/s 1.9m/s
15:00
100% 8.5°C 0mm 74% 0cm 58° 13°C 0mm 0.4kPa 24135m 2.5m/s 1.9m/s
16:00
100% 8.1°C 0mm 83% 0cm 49° 11°C 0mm 0.22kPa 24135m 2m/s 1.8m/s
17:00
100% 7.4°C 0mm 92% 0cm 38° 8.6°C 0mm 0.09kPa 24135m 1.5m/s 1.8m/s
18:00
100% 6.9°C 0mm 93% 0cm 28° 7.9°C 0mm 0.07kPa 24135m 1.5m/s 1.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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