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Rule Fog Hunter

Valemount - Fog Hunter - Canadian Rockies

Valemount, British Columbia, Canada

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Dewpoint Spread1.7°C
Visibility24135 (Clear)
Relative Humidity88%
Wind Speed1.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Vancouver

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the temperature inversions and fog conditions that create some of the most dramatic mountain photography in North America. We combine atmospheric data with local topography to predict when Bow Valley inversions will trap fog below while peaks glow above.

The Canadian Rockies are famous for their autumn morning fog, particularly in the Bow Valley corridor between Banff and Lake Louise. Cold mountain air settles into valleys overnight, creating thick fog layers that can persist until mid-morning, especially in September and October.

What makes Rockies fog photography exceptional:

  • Bow Valley inversions - Temperature inversions create sea-of-fog conditions with peaks emerging above the cloud layer
  • Glacier lake mist - Moraine Lake and Lake Louise develop ethereal mist at dawn when water temperatures meet cold air
  • Castle Junction phenomena - Junction areas where valleys meet create reliable fog formation zones
  • Autumn intensity - September through October brings the most dramatic and frequent fog events

Best shooting occurs at elevated viewpoints like Tunnel Mountain or Sulphur Mountain during inversions, or directly at lake level during misty conditions. Our forecast identifies when these different fog types will occur.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Vancouver
Fog Probability
≥ 75.0%
Sat, May 23
21:000%
22:000%
23:000%
Sun, May 24
24:0037%
01:0043%
02:0058%
03:0030%
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%
23:000%
Mon, May 25
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%
21:000%
22:000%
23:000%
Tue, May 26
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%
17:0044%
18:0048%
19:0048%
20:0055%
21:0055%
22:0055%
23:0055%
Wed, May 27
24:000%
01:000%
02:000%
03:000%
04:000%
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/Vancouver
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
Sun, May 24 Sunrise 04:46 Sunset 21:01
06:00
0% 1.6°C 0mm 88% 0cm 8.8° 3.3°C 0mm 0.09kPa 24135m 1.5m/s 1.2m/s
07:00
0% 2.4°C 0mm 81% 0cm 17° 5.4°C 0mm 0.17kPa 24135m 1.9m/s 1m/s
08:00
0% 2°C 0mm 68% 0cm 26° 7.6°C 0.06mm 0.34kPa 24134m 2.9m/s 1.2m/s
09:00
0% 1.1°C 0mm 58% 0cm 35° 9°C 0.06mm 0.49kPa 24134m 3.3m/s 1.3m/s
10:00
0% 0.9°C 0mm 53% 0cm 44° 9.9°C 0.13mm 0.57kPa 23835m 4.4m/s 1.5m/s
11:00
0% 0.6°C 0mm 50% 0cm 51° 11°C 0.19mm 0.64kPa 24134m 5.5m/s 1.8m/s
12:00
0% -0.2°C 0mm 44% 0cm 56° 12°C 0.06mm 0.76kPa 17122m 6.1m/s 2.2m/s
13:00
0% -0.4°C 0mm 44% 0cm 58° 11°C 0.06mm 0.76kPa 22514m 5.3m/s 2.5m/s
14:00
0% 0.3°C 0mm 44% 0cm 56° 12°C 0.06mm 0.79kPa 22593m 6.1m/s 2.8m/s
15:00
0% 0.2°C 0mm 43% 0cm 50° 13°C 0.13mm 0.83kPa 24134m 6.8m/s 2.8m/s
16:00
0% 0.6°C 0mm 45% 0cm 42° 12°C 0.13mm 0.79kPa 24135m 6.3m/s 3.2m/s
17:00
0% 1.7°C 0mm 50% 0cm 34° 12°C 0.13mm 0.7kPa 24135m 4.4m/s 3.4m/s
18:00
0% 3.5°C 0mm 62% 0cm 25° 11°C 0mm 0.49kPa 24135m 3.7m/s 3.3m/s
19:00
0% 4.4°C 0.01mm 71% 0cm 16° 9.4°C 0mm 0.34kPa 24135m 3.7m/s 2.9m/s
20:00
0% 4.6°C 0mm 78% 0cm 7.3° 8.2°C 0.06mm 0.24kPa 24135m 3m/s 2m/s
21:00
0% 4.6°C 0mm 84% 0cm -0.005° 7.1°C 0.06mm 0.16kPa 24134m 2.1m/s 1.6m/s
22:00
0% 4.3°C 0mm 87% 0cm -7.1° 6.4°C 0.06mm 0.13kPa 24134m 1.4m/s 1.4m/s
23:00
0% 4.1°C 0mm 90% 0cm -12° 5.7°C 0.06mm 0.09kPa 24134m 1.5m/s 1.6m/s
Mon, May 25 Sunrise 04:45 Sunset 21:03
24:00
0% 4°C 0mm 90% 0cm -15° 5.5°C 0mm 0.09kPa 24135m 1.6m/s 1.7m/s
01:00
0% 3.9°C 0mm 88% 0cm -16° 5.8°C 0mm 0.12kPa 24134m 2.1m/s 1.6m/s
02:00
0% 3.7°C 0mm 86% 0cm -15° 5.9°C 0mm 0.13kPa 24135m 2.1m/s 1.7m/s
03:00
0% 3.6°C 0.01mm 85% 0cm -11° 5.9°C 0mm 0.14kPa 24135m 3.3m/s 2m/s
04:00
0% 3.7°C 0.07mm 86% 0cm -5.8° 5.8°C 0.06mm 0.12kPa 24134m 4m/s 2.4m/s
05:00
0% 3.9°C 0.07mm 89% 0cm 1.3° 5.6°C 0.19mm 0.1kPa 24135m 3.8m/s 2.2m/s
06:00
0% 4.2°C 0.07mm 88% 0cm 6°C 0.06mm 0.11kPa 24134m 4.2m/s 2.1m/s
07:00
0% 4.3°C 0.24mm 87% 0cm 18° 6.3°C 0.19mm 0.12kPa 22709m 3.8m/s 2.1m/s
08:00
0% 4.5°C 0.41mm 88% 0cm 27° 6.3°C 0.63mm 0.11kPa 20712m 3.7m/s 2.3m/s
09:00
0% 4.6°C 0.13mm 88% 0cm 36° 6.3°C 0.88mm 0.11kPa 10259m 4m/s 2.5m/s
10:00
0% 4.7°C 0.08mm 85% 0cm 44° 7.1°C 1mm 0.16kPa 13799m 3.9m/s 2.4m/s
11:00
0% 4.4°C 0.24mm 75% 0cm 51° 8.6°C 1.1mm 0.28kPa 23398m 3.9m/s 2.3m/s
12:00
0% 4.7°C 0.32mm 74% 0cm 57° 9.1°C 0.31mm 0.3kPa 20878m 3.7m/s 2.2m/s
13:00
0% 4.9°C 0.13mm 74% 0cm 58° 9.3°C 0.69mm 0.3kPa 21012m 4.3m/s 2.8m/s
14:00
0% 4.5°C 0.02mm 67% 0cm 56° 10°C 0.88mm 0.41kPa 22647m 4.5m/s 3m/s
15:00
0% 4.3°C 0.01mm 62% 0cm 50° 11°C 0.94mm 0.51kPa 23803m 5m/s 3m/s
16:00
0% 4.3°C 0mm 60% 0cm 42° 12°C 1mm 0.55kPa 24134m 4.3m/s 2.9m/s
17:00
0% 4.4°C 0mm 60% 0cm 34° 12°C 1.1mm 0.55kPa 22528m 4m/s 3.2m/s
18:00
0% 4.3°C 0mm 61% 0cm 25° 11°C 0mm 0.52kPa 24134m 3m/s 2.3m/s
19:00
0% 4.3°C 0mm 62% 0cm 16° 11°C 0.06mm 0.5kPa 24135m 2.6m/s 2m/s
20:00
0% 5.1°C 0mm 74% 0cm 7.4° 9.6°C 0.06mm 0.31kPa 24134m 2.1m/s 1.6m/s
21:00
0% 4.7°C 0mm 79% 0cm 0.13° 8°C 0.06mm 0.22kPa 24134m 1m/s 1.1m/s
22:00
0% 4.6°C 0mm 81% 0cm -6.9° 7.7°C 0.06mm 0.2kPa 24134m 0.71m/s 0.79m/s
23:00
0% 4.5°C 0mm 82% 0cm -12° 7.3°C 0.06mm 0.18kPa 24135m 0.71m/s 0.66m/s
Tue, May 26 Sunrise 04:44 Sunset 21:04
24:00
1% 4.2°C 0mm 87% 0cm -15° 6.2°C 0mm 0.12kPa 24134m 1.7m/s 1.8m/s
01:00
3% 4.1°C 0mm 90% 0cm -16° 5.6°C 0mm 0.09kPa 24135m 1.2m/s 1.1m/s
02:00
4% 4.2°C 0.02mm 87% 0cm -15° 6.2°C 0mm 0.12kPa 24134m 1.8m/s 1.7m/s
03:00
3% 4.3°C 0.01mm 87% 0cm -11° 6.3°C 0.13mm 0.12kPa 24135m 0.72m/s 0.65m/s
04:00
1% 3.7°C 0mm 93% 0cm -5.7° 4.7°C 0.13mm 0.06kPa 24134m 1.1m/s 1.2m/s
05:00
0% 4.1°C 0mm 89% 0cm 1.4° 5.7°C 0.13mm 0.1kPa 24134m 0.82m/s 0.82m/s
06:00
0% 4.4°C 0.29mm 87% 0cm 9.1° 6.4°C 0.06mm 0.13kPa 22432m 1.1m/s 1.1m/s
07:00
0% 4.9°C 0.21mm 90% 0cm 18° 6.5°C 0.38mm 0.1kPa 24135m 0.83m/s 0.6m/s
08:00
0% 5.2°C 0.62mm 91% 0cm 27° 6.6°C 0.81mm 0.09kPa 15611m 1.4m/s 1.2m/s
09:00
0% 5.5°C 0.52mm 94% 0cm 36° 6.5°C 1.6mm 0.06kPa 17998m 1.4m/s 1.1m/s
10:00
0% 5.5°C 0.19mm 93% 0cm 44° 6.6°C 2mm 0.07kPa 21713m 0.81m/s 0.67m/s
11:00
0% 5.6°C 0.16mm 92% 0cm 52° 6.8°C 2.2mm 0.08kPa 24134m 1.5m/s 1.3m/s
12:00
0% 6°C 0.11mm 86% 0cm 57° 8.1°C 1.5mm 0.15kPa 24134m 2.3m/s 1.7m/s
13:00
0% 6.2°C 0.05mm 81% 0cm 58° 9.4°C 0.73mm 0.23kPa 24135m 3.1m/s 2.2m/s
14:00
0% 6.4°C 0mm 75% 0cm 56° 11°C 0mm 0.32kPa 24135m 3.9m/s 2.7m/s
15:00
0% 6.1°C 0mm 82% 0cm 50° 9.1°C 0mm 0.21kPa 24135m 3.6m/s 2.5m/s
16:00
0% 5.7°C 0mm 89% 0cm 43° 7.5°C 0mm 0.11kPa 24135m 3.4m/s 2.4m/s
17:00
0% 5.2°C 0mm 96% 0cm 34° 5.9°C 0mm 0.04kPa 24135m 3.1m/s 2.3m/s
18:00
1% 5.1°C 0mm 96% 0cm 25° 5.7°C 0mm 0.04kPa 24135m 2.5m/s 2m/s
19:00
1% 4.9°C 0mm 96% 0cm 16° 5.6°C 0mm 0.04kPa 24135m 2m/s 1.7m/s
20:00
2% 4.8°C 0mm 96% 0cm 7.6° 5.5°C 0mm 0.04kPa 24135m 1.4m/s 1.5m/s
21:00
3% 4.7°C 0mm 96% 0cm 0.27° 5.3°C 0mm 0.04kPa 24135m 1.7m/s 1.6m/s
22:00
5% 4.6°C 0mm 96% 0cm -6.8° 5.2°C 0mm 0.04kPa 24135m 2m/s 1.6m/s
23:00
6% 4.4°C 0mm 96% 0cm -12° 5°C 0mm 0.03kPa 24135m 2.3m/s 1.7m/s
Wed, May 27 Sunrise 04:43 Sunset 21:05
24:00
10% 4.6°C 0mm 90% 0cm -15° 6.1°C 0mm 0.09kPa 24135m 1.9m/s 1.5m/s
01:00
14% 4.8°C 0mm 85% 0cm -16° 7.2°C 0mm 0.15kPa 24135m 1.5m/s 1.2m/s
02:00
18% 4.9°C 0mm 79% 0cm -14° 8.2°C 0mm 0.22kPa 24135m 1.1m/s 0.95m/s
03:00
18% 5.3°C 0mm 71% 0cm -11° 10°C 0mm 0.37kPa 24135m 1.3m/s 1.2m/s
04:00
18% 5.6°C 0mm 62% 0cm -5.5° 13°C 0mm 0.56kPa 24135m 1.6m/s 1.5m/s
05:00
18% 5.5°C 0mm 53% 0cm 1.6° 15°C 0mm 0.8kPa 24135m 1.8m/s 1.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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