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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 Spread1.3°C
Visibility24134 (Clear)
Relative Humidity91%
Wind Speed1.9m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Los_Angeles
fog weather icon
Next opportunity
Dense Fog
Columbia River Gorge
Tomorrow · 01:00–04:00 · 3h window
Medium confidence
68%
🌫️Fog Probability75.8-100%
Dewpoint Spread: 0.0°C
Visibility: 1360 (Mist/Haze)
Relative Humidity: 99%
Wind Speed: 2.1m/s (calm conditions)
fog weather icon
Dense Fog at Sunrise
Columbia River Gorge
Tomorrow · 04:00–05:00
🌫️Fog Probability:100%
High
fog weather icon
Dense Fog at Sunrise
Columbia River Gorge
Tomorrow · 06:00–07:00
🌫️Fog Probability:100%
High
fog weather icon
Dense Fog
Columbia River Gorge
Tomorrow · 07:00–08:00
🌫️Fog Probability:100%
High

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
6matching hours in the next 74 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Los_Angeles
Fog Probability
≥ 75.0%
Fri, Jun 5
21:000%
22:000%
23:000%
Sat, Jun 6
24:000%
01:000%
02:0030%
03:0039%
04:0041%
05:000%
06:0068%
07:0060%
08:0053%
09:000%
10:000%
11:000%
12:0030%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Sun, Jun 7
24:0073%
01:0076%
02:00100%
03:00100%
04:00100%
05:0066%
06:00100%
07:00100%
08:0053%
09:0031%
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, Jun 8
24:0032%
01:0041%
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%
21:000%
22:000%
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
Sat, Jun 6 Sunrise 05:19 Sunset 20:53
01:00
0% 5.1°C 0mm 91% 0cm -22° 6.4°C 0.19mm 0.08kPa 24134m 2.9m/s 1.9m/s
02:00
0% 5.2°C 0mm 95% 0cm -21° 5.9°C 0.38mm 0.05kPa 22664m 3.6m/s 1.9m/s
03:00
0% 5.2°C 0mm 98% 0cm -17° 5.5°C 0.56mm 0.02kPa 20458m 3.8m/s 1.9m/s
04:00
0% 5.3°C 0mm 98% 0cm -11° 5.5°C 0.75mm 0.02kPa 13397m 3.5m/s 2m/s
05:00
0% 5.1°C 0mm 99% 0cm -3.4° 5.2°C 1mm 0.01kPa 924m 4.9m/s 2.1m/s
06:00
0% 5.2°C 0.22mm 99% 0cm 5.4° 5.3°C 0.31mm 0.01kPa 104m 6.4m/s 2.1m/s
07:00
0% 5.1°C 0.08mm 99% 0cm 15° 5.2°C 0.63mm 0.01kPa 197m 6.7m/s 2.1m/s
08:00
0% 5.1°C 0.03mm 99% 0cm 25° 5.2°C 0.88mm 0.01kPa 989m 6.6m/s 1.9m/s
09:00
0% 5.2°C 0.08mm 98% 0cm 36° 5.5°C 1mm 0.02kPa 4282m 6.8m/s 1.9m/s
10:00
0% 5.4°C 0mm 98% 0cm 46° 5.7°C 1.3mm 0.02kPa 9002m 7.1m/s 2.1m/s
11:00
0% 6.1°C 0mm 98% 0cm 56° 6.4°C 1.8mm 0.02kPa 5033m 6.6m/s 1.9m/s
12:00
0% 6.4°C 0.02mm 97% 0cm 63° 6.9°C 0.94mm 0.03kPa 7621m 6.6m/s 2.3m/s
13:00
0% 6.5°C 0mm 96% 0cm 67° 7°C 2.1mm 0.04kPa 10394m 6.7m/s 2.2m/s
14:00
0% 6.9°C 0mm 94% 0cm 65° 7.8°C 3.1mm 0.06kPa 9647m 6.9m/s 2.8m/s
15:00
0% 7.8°C 0mm 93% 0cm 57° 8.9°C 4.1mm 0.08kPa 6571m 6.8m/s 3.6m/s
16:00
0% 7.5°C 0mm 96% 0cm 48° 8.1°C 5.2mm 0.05kPa 9994m 6.9m/s 2.8m/s
17:00
0% 7.9°C 0.01mm 93% 0cm 38° 9°C 6.2mm 0.08kPa 6686m 6.6m/s 3m/s
18:00
0% 6.3°C 0.01mm 95% 0cm 27° 7°C 1.1mm 0.05kPa 16553m 4.7m/s 2.2m/s
19:00
0% 7.1°C 0mm 94% 0cm 17° 8°C 1.6mm 0.07kPa 15328m 4.8m/s 2.1m/s
20:00
0% 6.1°C 0.01mm 96% 0cm 7.4° 6.7°C 2.1mm 0.04kPa 16344m 2.7m/s 1.8m/s
21:00
0% 4.6°C 0mm 97% 0cm -1.5° 5°C 2.2mm 0.03kPa 24135m 2.5m/s 2.1m/s
22:00
0% 4°C 0mm 98% 0cm -9.5° 4.3°C 2.3mm 0.02kPa 24134m 2.5m/s 2.1m/s
23:00
0% 3.6°C 0mm 98% 0cm -16° 3.8°C 2.3mm 0.02kPa 24135m 2.5m/s 2.1m/s
Sun, Jun 7 Sunrise 05:19 Sunset 20:54
24:00
0% 3.3°C 0mm 99% 0cm -20° 3.4°C 0.06mm 0.01kPa 24134m 3.5m/s 2.4m/s
01:00
0% 3.7°C 0mm 99% 0cm -22° 3.8°C 0.06mm 0.01kPa 18632m 4m/s 2.2m/s
02:00
0% 4.5°C 0mm 99% 0cm -20° 4.5°C 0.13mm 0.01kPa 1360m 4.3m/s 2.1m/s
03:00
0% 4.8°C 0mm 100% 0cm -17° 4.9°C 0.19mm 0kPa 913m 4.5m/s 2.2m/s
04:00
0% 5°C 0.02mm 100% 0cm -11° 5.1°C 0.19mm 0kPa 737m 5m/s 2.2m/s
05:00
0% 5°C 0.05mm 99% 0cm -3.4° 5.1°C 0.31mm 0.01kPa 720m 5.3m/s 2m/s
06:00
0% 5°C 0.07mm 99% 0cm 5.5° 5.1°C 0.13mm 0.01kPa 746m 5m/s 2m/s
07:00
0% 5°C 0.01mm 99% 0cm 15° 5.1°C 0.19mm 0.01kPa 751m 3.9m/s 1.9m/s
08:00
0% 5.2°C 0.01mm 99% 0cm 25° 5.3°C 0.31mm 0.01kPa 876m 3.9m/s 2m/s
09:00
0% 5.2°C 0mm 97% 0cm 36° 5.6°C 0.44mm 0.02kPa 23332m 4.5m/s 2.1m/s
10:00
1% 5.6°C 0mm 94% 0cm 46° 6.6°C 0.56mm 0.06kPa 24134m 5.1m/s 2.4m/s
11:00
1% 5.2°C 0mm 88% 0cm 56° 7.1°C 0.63mm 0.13kPa 24134m 4.8m/s 2.6m/s
12:00
2% 3.5°C 0mm 63% 0cm 63° 10°C 0mm 0.46kPa 24134m 3.6m/s 2.5m/s
13:00
2% 1.9°C 0mm 48% 0cm 67° 13°C 0mm 0.76kPa 24134m 3.6m/s 2.7m/s
14:00
3% 0.9°C 0mm 39% 0cm 65° 15°C 0mm 1kPa 24134m 4m/s 2.7m/s
15:00
2% 0.8°C 0mm 38% 0cm 58° 15°C 0mm 1.1kPa 24135m 4m/s 3m/s
16:00
1% 0.9°C 0mm 38% 0cm 48° 15°C 0mm 1kPa 24134m 4.5m/s 3.4m/s
17:00
0% 1.2°C 0mm 40% 0cm 38° 15°C 0mm 1kPa 24134m 4.9m/s 3.5m/s
18:00
0% 1.6°C 0mm 43% 0cm 28° 14°C 0mm 0.91kPa 24134m 6m/s 3.9m/s
19:00
0% 2.5°C 0mm 49% 0cm 17° 13°C 0mm 0.75kPa 24134m 6.2m/s 3.7m/s
20:00
0% 3°C 0mm 59% 0cm 7.5° 11°C 0mm 0.52kPa 24135m 7.1m/s 3.8m/s
21:00
0% 2.7°C 0mm 68% 0cm -1.4° 8.4°C 0mm 0.36kPa 24134m 1.4m/s 1.4m/s
22:00
0% 4.2°C 0.15mm 78% 0cm -9.4° 7.8°C 0.06mm 0.23kPa 23831m 3.6m/s 1.8m/s
23:00
0% 5.9°C 0.13mm 92% 0cm -16° 7.1°C 0.25mm 0.08kPa 24134m 6.7m/s 2.1m/s
Mon, Jun 8 Sunrise 05:18 Sunset 20:54
24:00
1% 6°C 0.27mm 97% 0cm -20° 6.5°C 0.19mm 0.03kPa 23191m 2.5m/s 1.4m/s
01:00
1% 6.1°C 0.38mm 99% 0cm -21° 6.2°C 0.56mm 0.01kPa 20558m 2.4m/s 1.3m/s
02:00
2% 6°C 0.71mm 99% 0cm -20° 6.1°C 1mm 0.01kPa 11261m 1.9m/s 1.1m/s
03:00
1% 6.1°C 0.09mm 100% 0cm -17° 6.2°C 1.4mm 0kPa 6594m 1.6m/s 0.91m/s
04:00
1% 6.1°C 0.2mm 100% 0cm -11° 6.2°C 1.6mm 0kPa 7596m 1.4m/s 0.72m/s
05:00
0% 6.2°C 0.22mm 100% 0cm -3.3° 6.3°C 1.8mm 0kPa 19696m 1m/s 0.54m/s
06:00
0% 6.7°C 0.62mm 99% 0cm 5.5° 6.8°C 3.1mm 0.01kPa 16076m 0.99m/s 0.56m/s
07:00
0% 7.2°C 1mm 99% 0cm 15° 7.4°C 4.4mm 0.01kPa 12456m 0.97m/s 0.57m/s
08:00
0% 7.7°C 1.4mm 98% 0cm 25° 8°C 5.8mm 0.02kPa 8836m 0.96m/s 0.59m/s
09:00
0% 7.6°C 1.3mm 98% 0cm 36° 7.9°C 7.3mm 0.02kPa 9077m 1.8m/s 1.1m/s
10:00
0% 7.6°C 1.3mm 98% 0cm 46° 7.8°C 8.9mm 0.02kPa 9319m 2.7m/s 1.5m/s
11:00
0% 7.5°C 1.2mm 98% 0cm 56° 7.8°C 10mm 0.02kPa 9560m 3.5m/s 2m/s
12:00
0% 7.4°C 0.94mm 98% 0cm 64° 7.7°C 8.1mm 0.02kPa 14283m 3.1m/s 1.9m/s
13:00
1% 7.3°C 0.68mm 98% 0cm 67° 7.6°C 5.8mm 0.02kPa 19006m 2.7m/s 1.7m/s
14:00
1% 7.3°C 0.42mm 98% 0cm 65° 7.5°C 3.4mm 0.02kPa 23728m 2.2m/s 1.5m/s
15:00
1% 7.3°C 0.41mm 99% 0cm 58° 7.5°C 3.7mm 0.01kPa 16029m 2.2m/s 1.4m/s
16:00
0% 7.3°C 0.39mm 99% 0cm 48° 7.4°C 4mm 0.01kPa 8330m 2.2m/s 1.3m/s
17:00
0% 7.3°C 0.38mm 100% 0cm 38° 7.4°C 4.3mm 0kPa 631m 2.1m/s 1.2m/s
18:00
0% 7.3°C 0.36mm 100% 0cm 28° 7.3°C 3.4mm 0kPa 446m 2.6m/s 1.3m/s
19:00
0% 7.2°C 0.35mm 100% 0cm 17° 7.2°C 2.5mm 0kPa 262m 3m/s 1.4m/s
20:00
0% 7.1°C 0.33mm 100% 0cm 7.6° 7.1°C 1.6mm 0kPa 78m 3.5m/s 1.5m/s
21:00
0% 7.1°C 0.33mm 100% 0cm -1.3° 7.1°C 2.2mm 0kPa 64m 4.7m/s 1.8m/s
22:00
0% 7.1°C 0.34mm 100% 0cm -9.3° 7.1°C 2.8mm 0kPa 49m 6m/s 2.1m/s
23:00
0% 7°C 0.34mm 100% 0cm -16° 7.1°C 3.4mm 0kPa 35m 7.3m/s 2.3m/s
Tue, Jun 9 Sunrise 05:18 Sunset 20:55
24:00
0% 6.8°C 0.31mm 100% 0cm -20° 6.9°C 3mm 0kPa 688m 7.5m/s 2.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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