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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

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Los_Angeles
Next opportunity
Dense Fog (lingering)
Columbia River Gorge
Fri, Jan 23 · 19:00–22:00 · 3h window
Medium confidence
42%

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 72 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Los_Angeles
Fog Probability
≥ 85.0%
Dewpoint Spread
≤ 2.0°C
Visibility
≤ 3000.0m
Wind Speed
≤ 2.0m/s
Sat, Jan 10
11:000%4.4°C22600m1.4m/s
12:000%5.4°C25300m2.1m/s
13:000%5.4°C25300m2.3m/s
14:000%5.9°C26500m2m/s
15:000%4°C21500m1m/s
16:000%4.6°C22800m1.2m/s
17:000%5.3°C25500m1.6m/s
18:000%6.1°C28000m2.2m/s
19:000%6.7°C29800m0.61m/s
20:000%6.9°C30400m0.51m/s
21:000%7.4°C31900m0.14m/s
22:000%8.1°C34900m0.58m/s
23:000%8.4°C35400m0.32m/s
Sun, Jan 11
24:000%8.6°C36200m0.95m/s
01:000%8.6°C36300m0.42m/s
02:000%8.6°C36600m0.72m/s
03:000%8.6°C36100m1.4m/s
04:000%9.1°C38000m2.5m/s
05:000%9.7°C40000m3.1m/s
06:000%9.1°C37500m3.1m/s
07:000%9.4°C38800m2.5m/s
08:000%10°C41900m2m/s
09:000%10°C40600m2.1m/s
10:000%7.3°C31000m1.1m/s
11:000%5.1°C24800m1.6m/s
12:000%2.9°C18500m0.51m/s
13:000%3.1°C18800m0.85m/s
14:000%2.6°C17600m0.42m/s
15:000%2.3°C16800m0.5m/s
16:000%2.2°C16700m0.1m/s
17:000%4.6°C22000m0.28m/s
18:000%7.1°C30700m0.41m/s
19:000%7.7°C32900m0.32m/s
20:000%8.7°C35900m0.5m/s
21:000%10°C41500m1.3m/s
22:000%11°C44600m3.1m/s
23:000%9.7°C40200m3.4m/s
Mon, Jan 12
24:000%8.4°C35000m3.4m/s
01:000%6.7°C29600m3.2m/s
02:000%6.1°C26285m2.9m/s
03:000%6.4°C24970m2.4m/s
04:000%6.1°C24505m2.3m/s
05:000%5.9°C24140m2.2m/s
06:000%5.7°C24140m2m/s
07:000%5.7°C24140m1.8m/s
08:000%6°C24140m1.8m/s
09:000%6.9°C24140m1.5m/s
10:000%7.8°C24140m1.4m/s
11:000%9.7°C24140m1.2m/s
12:000%9.8°C24140m1m/s
13:000%11°C24140m1.4m/s
14:000%8.5°C24140m0.81m/s
15:000%7.7°C24140m0.73m/s
16:000%6.7°C24140m0.82m/s
17:000%6.1°C24140m1.5m/s
18:000%5.6°C24140m1.6m/s
19:000%5.8°C24140m1.5m/s
20:000%6.3°C24140m1.7m/s
21:000%6.7°C24140m1.1m/s
22:000%6.7°C24140m1.6m/s
23:000%6.7°C24140m1.5m/s
Tue, Jan 13
24:000%5.9°C24140m1.3m/s
01:000%4.8°C24140m1.5m/s
02:000%4.4°C24140m0.81m/s
03:000%3.5°C24140m1.1m/s
04:000%3.5°C24140m1.1m/s
05:000%3.5°C24140m1.4m/s
06:000%3.3°C24140m1.5m/s
07:000%2.7°C24140m1.6m/s
08:000%2.7°C24140m1.5m/s
09:000%3.5°C24140m1.6m/s
10:000%5.1°C24140m1.8m/s
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
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Wind Gusts
m/s
Sat, Jan 10 Sunrise 07:46 Sunset 16:42
12:00
4°C 0mm 69% 0cm 9.4°C 0mm 0.37kPa 6.4m/s
13:00
4.4°C 0mm 69% 0cm 9.8°C 0mm 0.38kPa 6.3m/s
14:00
4.4°C 0mm 67% 0cm 10°C 0mm 0.41kPa 5.2m/s
15:00
6°C 0mm 76% 0cm 10°C 0mm 0.29kPa 4.8m/s
16:00
4.2°C 0mm 73% 0cm 8.8°C 0mm 0.31kPa 3.2m/s
17:00
1.9°C 0mm 69% 0cm 7.2°C 0mm 0.31kPa 2.5m/s
18:00
0.3°C 0mm 65% 0cm 6.4°C 0mm 0.34kPa 2.6m/s
19:00
-0.5°C 0mm 62% 0cm 6.2°C 0mm 0.36kPa 2.1m/s
20:00
-0.9°C 0mm 61% 0cm 6°C 0mm 0.36kPa 2m/s
21:00
-1.4°C 0mm 59% 0cm 6°C 0mm 0.38kPa 2.2m/s
22:00
-1.9°C 0mm 56% 0cm 6.2°C 0mm 0.42kPa 2.8m/s
23:00
-2.1°C 0mm 55% 0cm 6.3°C 0mm 0.43kPa 2.7m/s
Sun, Jan 11 Sunrise 07:46 Sunset 16:43
24:00
-2.8°C 0mm 54% 0cm 5.8°C 0mm 0.42kPa 2.3m/s
01:00
-3.2°C 0mm 54% 0cm 5.4°C 0mm 0.41kPa 1.4m/s
02:00
-2.7°C 0mm 54% 0cm 5.9°C 0mm 0.43kPa 1.6m/s
03:00
-3.2°C 0mm 54% 0cm 5.4°C 0mm 0.41kPa 1.5m/s
04:00
-3.5°C 0mm 52% 0cm 5.6°C 0mm 0.44kPa 2.4m/s
05:00
-3°C 0mm 50% 0cm 6.7°C 0mm 0.49kPa 3.1m/s
06:00
-2.6°C 0mm 52% 0cm 6.5°C 0mm 0.46kPa 3m/s
07:00
-3°C 0mm 51% 0cm 6.4°C 0mm 0.47kPa 3.4m/s
08:00
-3.1°C 0mm 48% 0cm 7.2°C 0mm 0.53kPa 2.5m/s
09:00
-2.7°C 0mm 49% 0cm 7.3°C 0mm 0.52kPa 3.3m/s
10:00
0.2°C 0mm 60% 0cm 7.5°C 0mm 0.41kPa 1.5m/s
11:00
2.2°C 0mm 70% 0cm 7.3°C 0mm 0.31kPa 1.7m/s
12:00
6.5°C 0mm 82% 0cm 9.4°C 0mm 0.21kPa 1.4m/s
13:00
7.7°C 0mm 81% 0cm 11°C 0mm 0.25kPa 1.9m/s
14:00
8.7°C 0mm 84% 0cm 11°C 0mm 0.21kPa 1.9m/s
15:00
9.2°C 0mm 86% 0cm 12°C 0mm 0.19kPa 2.1m/s
16:00
8.1°C 0mm 86% 0cm 10°C 0mm 0.18kPa 2.4m/s
17:00
4.1°C 0mm 73% 0cm 8.7°C 0mm 0.3kPa 2.7m/s
18:00
0.9°C 0mm 61% 0cm 8°C 0mm 0.42kPa 2.7m/s
19:00
-0.4°C 0mm 58% 0cm 7.3°C 0mm 0.43kPa 1.2m/s
20:00
-1.8°C 0mm 54% 0cm 6.9°C 0mm 0.46kPa 1.2m/s
21:00
-3.3°C 0mm 48% 0cm 7°C 0mm 0.52kPa 1.3m/s
22:00
-3.8°C 0mm 45% 0cm 7.4°C 0mm 0.57kPa 3.2m/s
23:00
-2.6°C 0mm 50% 0cm 7.1°C 0mm 0.5kPa 3.5m/s
Mon, Jan 12 Sunrise 07:46 Sunset 16:44
24:00
-1.8°C 0mm 55% 0cm 6.6°C 0mm 0.44kPa 3.3m/s
01:00
-0.3°C 0mm 62% 0cm 6.4°C 0mm 0.37kPa 3.3m/s
02:00
0.8°C 0mm 65% 0cm 6.9°C 0mm 0.35kPa 3m/s
03:00
0.8°C 0mm 64% 0cm 7.2°C 0mm 0.37kPa 2.4m/s
04:00
1.3°C 0mm 65% 0cm 7.4°C 0mm 0.36kPa 1.9m/s
05:00
1.8°C 0mm 66% 0cm 7.7°C 0mm 0.36kPa 0.9m/s
06:00
2.2°C 0mm 67% 0cm 7.9°C 0mm 0.35kPa 0.8m/s
07:00
2.1°C 0mm 67% 0cm 7.8°C 0mm 0.35kPa 1.2m/s
08:00
1.9°C 0mm 66% 0cm 7.9°C 0mm 0.36kPa 1m/s
09:00
2.7°C 0mm 62% 0cm 9.6°C 0mm 0.45kPa 0.9m/s
10:00
4.2°C 0mm 59% 0cm 12°C 0mm 0.57kPa 0.4m/s
11:00
4.9°C 0mm 52% 0cm 15°C 0mm 0.8kPa 1.4m/s
12:00
5.3°C 0mm 52% 0cm 15°C 0mm 0.82kPa 1.5m/s
13:00
5°C 0mm 48% 0cm 16°C 0mm 0.94kPa 1.9m/s
14:00
7.3°C 0mm 57% 0cm 16°C 0mm 0.77kPa 0.9m/s
15:00
8°C 0mm 60% 0cm 16°C 0mm 0.71kPa 0.4m/s
16:00
6.5°C 0mm 64% 0cm 13°C 0mm 0.55kPa 0.1m/s
17:00
4.9°C 0mm 66% 0cm 11°C 0mm 0.45kPa 1.8m/s
18:00
4.5°C 0mm 68% 0cm 10°C 0mm 0.4kPa 1.2m/s
19:00
4.1°C 0mm 67% 0cm 9.9°C 0mm 0.4kPa 0.8m/s
20:00
3.6°C 0mm 65% 0cm 9.9°C 0mm 0.43kPa 0.8m/s
21:00
3.3°C 0mm 63% 0cm 10°C 0mm 0.45kPa 1.3m/s
22:00
3.3°C 0mm 63% 0cm 10°C 0mm 0.45kPa 0.9m/s
23:00
3.6°C 0mm 63% 0cm 10°C 0mm 0.46kPa 0.7m/s
Tue, Jan 13 Sunrise 07:45 Sunset 16:46
24:00
4.3°C 0mm 67% 0cm 10°C 0mm 0.41kPa 0.8m/s
01:00
5°C 0mm 72% 0cm 9.8°C 0mm 0.34kPa 1.4m/s
02:00
5.5°C 0mm 74% 0cm 9.9°C 0mm 0.32kPa 1.2m/s
03:00
6°C 0mm 79% 0cm 9.5°C 0mm 0.25kPa 1.1m/s
04:00
6°C 0mm 79% 0cm 9.5°C 0mm 0.25kPa 1m/s
05:00
6.2°C 0mm 79% 0cm 9.7°C 0mm 0.25kPa 1m/s
06:00
6.2°C 0mm 80% 0cm 9.5°C 0mm 0.24kPa 1.2m/s
07:00
6.2°C 0mm 83% 0cm 8.9°C 0mm 0.19kPa 1.3m/s
08:00
6.2°C 0mm 83% 0cm 8.9°C 0mm 0.19kPa 1.4m/s
09:00
6.9°C 0mm 79% 0cm 10°C 0mm 0.26kPa 1.8m/s
10:00
7.7°C 0mm 71% 0cm 13°C 0mm 0.43kPa 2.5m/s
11:00
8°C 0mm 66% 0cm 14°C 0mm 0.55kPa 2.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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