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Rule Fog Hunter

Kananaskis - Fog Hunter - Canadian Rockies

Kananaskis, Alberta, Canada

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.0°C
Visibility24134 (Clear)
Relative Humidity92%
Wind Speed3.6m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Edmonton
fog weather icon
Next opportunity
Moderate Fog
Kananaskis
Wed, Apr 22 · 01:00–02:00 · 1h window
Low confidence
33%
🌫️Fog Probability61.4%
Dewpoint Spread: 0.2°C
Visibility: 313 (Fog)
Relative Humidity: 98%
Wind Speed: 1.6m/s (calm conditions)
fog weather icon
Dense Fog
Kananaskis
Wed, Apr 22 · 03:00–04:00
🌫️Fog Probability:100%
Medium
fog weather icon
Moderate Fog at Dawn
Kananaskis
Wed, Apr 22 · 05:00–06:00
🌫️Fog Probability:60.7%
Low
fog weather icon
Moderate Fog at Sunrise
Kananaskis
Wed, Apr 22 · 06:00–07:00
🌫️Fog Probability:60.7%
Low
fog weather icon
Dense Fog at Sunset
Kananaskis
Wed, Apr 22 · 21:00–22:00
🌫️Fog Probability:88.6%
Medium
fog weather icon
Dense Fog
Kananaskis
Wed, Apr 22 · 22:00–01:00
🌫️Fog Probability:88.6-93.6%
High
fog weather icon
Moderate Fog
Kananaskis
Thu, Apr 23 · 18:00–20:00
🌫️Fog Probability:70.1-71.8%
Low
+3 more windows in the next 10 days

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/Edmonton
Fog Probability
≥ 60.0%
Fri, Apr 17
22:0040%
23:0040%
Sat, Apr 18
24:0040%
01:0040%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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22:000%
23:000%
Sun, Apr 19
24:000%
01:000%
02:000%
03:000%
04:000%
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06:000%
07:000%
08:000%
09:000%
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22:000%
23:000%
Mon, Apr 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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23:000%
Tue, Apr 21
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
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/Edmonton
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 18 Sunrise 06:38 Sunset 20:40
07:00
86% -9.3°C 0mm 92% 0cm 2.7° -8.3°C 0mm 0.03kPa 24134m 4.2m/s 3.6m/s
08:00
71% -6.5°C 0mm 90% 0cm 12° -5.2°C 0mm 0.04kPa 24135m 4.2m/s 3.2m/s
09:00
57% -4.3°C 0mm 82% 0cm 21° -1.6°C 0mm 0.1kPa 24135m 3.7m/s 2.8m/s
10:00
50% -3.3°C 0mm 79% 0cm 30° -0.05°C 0mm 0.13kPa 24135m 3.5m/s 2.4m/s
11:00
42% -2.1°C 0mm 79% 0cm 39° 1.1°C 0mm 0.14kPa 24135m 3.1m/s 2m/s
12:00
35% -1.3°C 0mm 78% 0cm 45° 2.1°C 0mm 0.15kPa 24134m 2.9m/s 1.8m/s
13:00
37% -0.5°C 0mm 78% 0cm 49° 3°C 0mm 0.17kPa 24135m 2.7m/s 1.6m/s
14:00
38% 0°C 0mm 77% 0cm 50° 3.7°C 0mm 0.18kPa 24135m 2.8m/s 1.6m/s
15:00
40% 0.2°C 0mm 75% 0cm 47° 4.2°C 0mm 0.2kPa 24134m 2.7m/s 1.6m/s
16:00
39% 0.2°C 0mm 74% 0cm 41° 4.4°C 0mm 0.21kPa 24134m 2.9m/s 1.7m/s
17:00
39% 0.1°C 0mm 74% 0cm 33° 4.3°C 0mm 0.22kPa 24135m 3.1m/s 2m/s
18:00 ☾
38% 0.7°C 0mm 79% 0cm 24° 4.1°C 0mm 0.17kPa 24135m 3.1m/s 1.9m/s
19:00 ☾
36% 1.2°C 0mm 86% 0cm 15° 3.2°C 0mm 0.1kPa 24135m 2.6m/s 1.7m/s
20:00 ☾
33% -0.7°C 0mm 91% 0cm 5.6° 0.64°C 0mm 0.06kPa 24135m 1.7m/s 2.1m/s
21:00 ☾
31% -3.9°C 0mm 91% 0cm -3.5° -2.6°C 0mm 0.05kPa 24135m 2m/s 2.8m/s
22:00 ☾
29% -4.5°C 0mm 91% 0cm -12° -3.3°C 0mm 0.04kPa 24135m 2.9m/s 3m/s
23:00 ☾
28% -4.9°C 0mm 92% 0cm -19° -3.8°C 0mm 0.04kPa 24134m 3.2m/s 3m/s
Sun, Apr 19 Sunrise 06:36 Sunset 20:42
24:00 ☾
26% -5.1°C 0mm 92% 0cm -24° -4°C 0mm 0.04kPa 24134m 3.2m/s 3m/s
01:00 ☾
48% -5.1°C 0mm 92% 0cm -27° -4°C 0mm 0.04kPa 24135m 3.3m/s 3.1m/s
02:00 ☾
71% -5.1°C 0mm 92% 0cm -28° -4°C 0mm 0.04kPa 24134m 3.3m/s 3.2m/s
03:00 ☾
93% -5.2°C 0mm 92% 0cm -25° -4.1°C 0mm 0.04kPa 24134m 3.3m/s 3.1m/s
04:00 ☾
89% -5.1°C 0mm 92% 0cm -21° -4°C 0mm 0.03kPa 24134m 3.3m/s 3.1m/s
05:00 ☾
86% -5.1°C 0mm 92% 0cm -14° -4.1°C 0mm 0.03kPa 24135m 3.4m/s 3.2m/s
06:00 ☾
82% -5°C 0mm 92% 0cm -6.1° -3.9°C 0mm 0.04kPa 24134m 3.6m/s 3.3m/s
07:00
58% -4.9°C 0mm 92% 0cm 3° -3.7°C 0mm 0.04kPa 24135m 4.1m/s 3.4m/s
08:00
35% -2.8°C 0mm 90% 0cm 12° -1.3°C 0mm 0.06kPa 24135m 4.3m/s 3.2m/s
09:00
11% -0.4°C 0mm 87% 0cm 21° 1.6°C 0mm 0.09kPa 24134m 4.1m/s 2.9m/s
10:00
8% 0.5°C 0mm 80% 0cm 31° 3.6°C 0mm 0.16kPa 24134m 4.2m/s 2.9m/s
11:00
4% 1.1°C 0mm 75% 0cm 39° 5.1°C 0mm 0.22kPa 24134m 4.4m/s 2.9m/s
12:00
1% 1.6°C 0mm 72% 0cm 45° 6.3°C 0mm 0.27kPa 24134m 4.4m/s 2.9m/s
13:00
1% 2.1°C 0mm 70% 0cm 50° 7.3°C 0mm 0.31kPa 24134m 4.5m/s 3m/s
14:00
0% 2.4°C 0mm 68% 0cm 50° 8.1°C 0mm 0.35kPa 24134m 4.8m/s 3.1m/s
15:00
0% 2.5°C 0mm 67% 0cm 47° 8.3°C 0mm 0.36kPa 24135m 4.6m/s 3.1m/s
16:00
0% 3°C 0mm 69% 0cm 41° 8.4°C 0mm 0.34kPa 24134m 5.1m/s 3.2m/s
17:00
0% 3.2°C 0mm 72% 0cm 33° 8°C 0mm 0.3kPa 24135m 6.4m/s 3.3m/s
18:00 ☾
0% 3.3°C 0mm 77% 0cm 24° 7°C 0mm 0.23kPa 24134m 5.9m/s 3.5m/s
19:00 ☾
0% 2.8°C 0mm 85% 0cm 15° 5.1°C 0mm 0.13kPa 24135m 5.2m/s 3.6m/s
20:00 ☾
0% 1.5°C 0mm 90% 0cm 5.8° 2.9°C 0mm 0.07kPa 24135m 4.6m/s 3.5m/s
21:00 ☾
0% 0.4°C 0mm 91% 0cm -3.2° 1.7°C 0mm 0.06kPa 24134m 5.4m/s 4m/s
22:00 ☾
0% 0.1°C 0mm 90% 0cm -12° 1.6°C 0mm 0.07kPa 24135m 5.8m/s 4.3m/s
23:00 ☾
0% -0.1°C 0mm 89% 0cm -19° 1.5°C 0mm 0.08kPa 24134m 5.2m/s 4m/s
Mon, Apr 20 Sunrise 06:34 Sunset 20:44
24:00 ☾
0% -0.2°C 0mm 89% 0cm -24° 1.4°C 0mm 0.07kPa 24134m 4.5m/s 3.7m/s
01:00 ☾
3% -0.8°C 0mm 90% 0cm -27° 0.66°C 0mm 0.06kPa 24134m 3.6m/s 3.3m/s
02:00 ☾
5% -0.8°C 0mm 91% 0cm -27° 0.47°C 0mm 0.06kPa 24135m 3.4m/s 3.2m/s
03:00 ☾
8% -0.9°C 0mm 91% 0cm -25° 0.47°C 0mm 0.06kPa 24135m 3.3m/s 3.1m/s
04:00 ☾
10% -1°C 0mm 91% 0cm -20° 0.36°C 0mm 0.06kPa 24134m 3.5m/s 3.2m/s
05:00 ☾
11% -1°C 0mm 90% 0cm -14° 0.4°C 0mm 0.06kPa 24134m 3.4m/s 3.1m/s
06:00 ☾
13% -0.8°C 0mm 90% 0cm -5.7° 0.57°C 0mm 0.06kPa 24135m 3.2m/s 2.9m/s
07:00
33% -0.9°C 0mm 90% 0cm 3.2° 0.49°C 0mm 0.06kPa 24135m 2m/s 2.6m/s
08:00
52% 0.6°C 0mm 89% 0cm 12° 2.3°C 0mm 0.08kPa 24134m 2.6m/s 2.2m/s
09:00
72% 2.4°C 0mm 80% 0cm 22° 5.5°C 0mm 0.18kPa 24134m 2.4m/s 1.7m/s
10:00
76% 3°C 0mm 72% 0cm 31° 7.7°C 0mm 0.29kPa 24135m 2.2m/s 1.3m/s
11:00
80% 3.3°C 0mm 65% 0cm 39° 9.4°C 0mm 0.41kPa 24135m 2.8m/s 1.3m/s
12:00
84% 3.2°C 0mm 60% 0cm 46° 11°C 0mm 0.51kPa 24135m 3.2m/s 1.5m/s
13:00
87% 3.1°C 0mm 69% 0cm 50° 8.4°C 0mm 0.34kPa 24135m 2.9m/s 2m/s
14:00
91% 2.7°C 0mm 79% 0cm 50° 6.1°C 0mm 0.2kPa 24135m 2.6m/s 2.5m/s
15:00
94% 2.1°C 0mm 88% 0cm 47° 3.9°C 0mm 0.09kPa 24135m 2.2m/s 2.9m/s
16:00
96% 1.7°C 0mm 89% 0cm 41° 3.4°C 0mm 0.09kPa 24135m 2.5m/s 3m/s
17:00
97% 1.3°C 0mm 89% 0cm 34° 3°C 0mm 0.09kPa 24135m 2.8m/s 3m/s
18:00 ☾
99% 1°C 0mm 89% 0cm 25° 2.6°C 0mm 0.08kPa 24135m 3.1m/s 3.1m/s
19:00 ☾
90% 1.1°C 0mm 88% 0cm 15° 2.9°C 0mm 0.09kPa 24135m 3.1m/s 3.1m/s
20:00 ☾
81% 1.3°C 0mm 87% 0cm 6° 3.3°C 0mm 0.1kPa 24135m 3.2m/s 3m/s
21:00 ☾
72% 1.4°C 0mm 86% 0cm -3° 3.6°C 0mm 0.11kPa 24135m 3.2m/s 3m/s
22:00 ☾
62% 1.3°C 0mm 87% 0cm -11° 3.3°C 0mm 0.1kPa 24135m 3.6m/s 3.1m/s
23:00 ☾
52% 1.2°C 0mm 88% 0cm -18° 3°C 0mm 0.09kPa 24135m 4m/s 3.3m/s
Tue, Apr 21 Sunrise 06:32 Sunset 20:45
24:00 ☾
42% 1°C 0mm 88% 0cm -23° 2.7°C 0mm 0.09kPa 24135m 4.4m/s 3.4m/s
01:00 ☾
31% 1.8°C 0mm 84% 0cm -26° 4.3°C 0mm 0.13kPa 24135m 4m/s 3m/s
02:00 ☾
20% 2.6°C 0mm 79% 0cm -27° 5.9°C 0mm 0.19kPa 24135m 3.6m/s 2.5m/s
03:00 ☾
9% 3.3°C 0mm 75% 0cm -25° 7.5°C 0mm 0.26kPa 24135m 3.2m/s 2m/s
04:00 ☾
8% 3°C 0mm 64% 0cm -20° 9.5°C 0mm 0.43kPa 24135m 4.2m/s 1.8m/s
05:00 ☾
8% 2.2°C 0mm 53% 0cm -13° 12°C 0mm 0.64kPa 24135m 5.2m/s 1.6m/s
06:00 ☾
7% 0.9°C 0mm 42% 0cm -5.4° 14°C 0mm 0.9kPa 24135m 6.1m/s 1.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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