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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
99%
Dewpoint Spread0.3°C
Visibility9320 (Moderate)
Relative Humidity98%
Wind Speed1.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Edmonton
fog weather icon
Next opportunity
Dense Fog
Kananaskis
Today · 01:00–02:00 · 1h window
High confidence
85%
🌫️Fog Probability98.5%
Dewpoint Spread: 0.3°C
Visibility: 9320 (Moderate)
Relative Humidity: 98%
Wind Speed: 1.2m/s (calm conditions)
fog weather icon
Moderate Fog
Kananaskis
Today · 04:00–06:00
🌫️Fog Probability:61.4%
Low
fog weather icon
Moderate Fog at Sunrise
Kananaskis
Today · 06:00–08:00
🌫️Fog Probability:61.4%
Low
fog weather icon
Moderate Fog
Kananaskis
Today · 20:00–22:00
🌫️Fog Probability:61.4-66.7%
Low
fog weather icon
Moderate Fog
Kananaskis
Tomorrow · 20:00–23:00
🌫️Fog Probability:66.7-88.6%
Medium
fog weather icon
Moderate Fog
Kananaskis
Sat, Apr 11 · 05:00–06:00
🌫️Fog Probability:61.4%
Low
fog weather icon
Moderate Fog at Sunrise
Kananaskis
Sat, Apr 11 · 06:00–07:00
🌫️Fog Probability:78.4%
Medium
+5 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
13matching hours in the next 74 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Edmonton
Fog Probability
≥ 60.0%
Wed, Apr 8
22:000%
23:000%
Thu, Apr 9
24:000%
01:0099%
02:0046%
03:0046%
04:0061%
05:0061%
06:0061%
07:0061%
08:000%
09:000%
10:000%
11:000%
12:0016%
13:000%
14:008.9%
15:008.9%
16:000%
17:000%
18:000%
19:000%
20:0061%
21:0067%
22:0043%
23:0043%
Fri, Apr 10
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%
20:0089%
21:0084%
22:0067%
23:0057%
Sat, Apr 11
24:0043%
01:0043%
02:0043%
03:0043%
04:0050%
05:0061%
06:0078%
07:000%
08:000%
09:000%
10:000%
11:000%
12:0033%
13:0044%
14:0049%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:0063%
22:000%
23:000%
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
Thu, Apr 9 Sunrise 06:57 Sunset 20:24
01:00 ☾
22% -7°C 0mm 98% 0cm -31° -6.7°C 0mm 0.01kPa 9320m 1m/s 1.2m/s
02:00 ☾
44% -7.4°C 0mm 95% 0cm -31° -6.7°C 0mm 0.02kPa 23280m 1.3m/s 1.5m/s
03:00 ☾
66% -7.8°C 0mm 95% 0cm -29° -7.1°C 0mm 0.02kPa 23503m 1.3m/s 1.6m/s
04:00 ☾
67% -8.6°C 0mm 95% 0cm -24° -8°C 0mm 0.02kPa 23501m 1.3m/s 1.7m/s
05:00 ☾
67% -8.9°C 0mm 95% 0cm -17° -8.3°C 0mm 0.02kPa 22163m 1.4m/s 1.7m/s
06:00 ☾
68% -8.8°C 0mm 95% 0cm -9.4° -8.2°C 0mm 0.02kPa 22403m 1.3m/s 1.8m/s
07:00 ☾
53% -8.7°C 0.01mm 95% 0cm 0.08° -8.1°C 0mm 0.02kPa 19010m 1.3m/s 1.6m/s
08:00 ☾
39% -7°C 0.03mm 91% 0cm 9° -5.8°C 0mm 0.04kPa 4202m 1.1m/s 0.98m/s
09:00 ☾
24% -5.5°C 0.03mm 87% 0cm 18° -3.7°C 0mm 0.06kPa 4941m 1.1m/s 0.76m/s
10:00 ☾
16% -4.5°C 0.03mm 82% 0.05cm 27° -2°C 0.06mm 0.09kPa 9729m 1.3m/s 1.1m/s
11:00 ☾
9% -4.3°C 0.04mm 79% 0.07cm 35° -1.1°C 0.13mm 0.12kPa 13136m 1.4m/s 1.2m/s
12:00 ☾
1% -3.5°C 0.08mm 84% 0.11cm 42° -1.1°C 0.19mm 0.09kPa 2369m 1.1m/s 1.6m/s
13:00 ☾
1% -2.4°C 0.07mm 82% 0.15cm 46° 0.28°C 0.13mm 0.11kPa 3078m 1.3m/s 2m/s
14:00 ☾
0% -2°C 0.08mm 85% 0.14cm 47° 0.27°C 0.25mm 0.1kPa 1337m 1.4m/s 2.3m/s
15:00 ☾
0% -1.7°C 0.07mm 84% 0.11cm 44° 0.58°C 0.38mm 0.1kPa 2267m 1.8m/s 2.2m/s
16:00 ☾
0% -1.8°C 0.03mm 82% 0.05cm 38° 1°C 0.44mm 0.12kPa 12187m 1.5m/s 2m/s
17:00 ☾
0% -1.9°C 0.01mm 79% 0cm 31° 1.4°C 0.44mm 0.14kPa 21041m 1.5m/s 1.8m/s
18:00 ☾
0% -2°C 0mm 79% 0cm 22° 1.2°C 0.44mm 0.14kPa 23345m 1.5m/s 1.5m/s
19:00 ☾
10% -1.5°C 0mm 84% 0cm 13° 0.95°C 0mm 0.11kPa 24135m 1.6m/s 1.3m/s
20:00 ☾
21% -2.5°C 0mm 96% 0cm 3.5° -1.9°C 0mm 0.02kPa 24135m 0.91m/s 0.86m/s
21:00 ☾
31% -4.6°C 0mm 96% 0cm -5.8° -4.1°C 0mm 0.02kPa 24135m 1.5m/s 1.9m/s
22:00 ☾
46% -5°C 0mm 94% 0cm -14° -4.2°C 0mm 0.03kPa 24134m 1.7m/s 2.1m/s
23:00 ☾
60% -5.5°C 0mm 93% 0cm -22° -4.5°C 0mm 0.03kPa 24135m 1.7m/s 2.2m/s
Fri, Apr 10 Sunrise 06:55 Sunset 20:26
24:00 ☾
75% -5.7°C 0mm 92% 0cm -27° -4.5°C 0mm 0.04kPa 24135m 1.7m/s 2.3m/s
01:00 ☾
76% -5.8°C 0mm 91% 0cm -30° -4.5°C 0mm 0.04kPa 24134m 1.8m/s 2.5m/s
02:00 ☾
78% -5.9°C 0mm 90% 0cm -31° -4.5°C 0mm 0.04kPa 24134m 1.8m/s 2.5m/s
03:00 ☾
79% -5.9°C 0mm 90% 0cm -29° -4.5°C 0mm 0.04kPa 24135m 1.8m/s 2.6m/s
04:00 ☾
80% -6°C 0mm 90% 0cm -24° -4.5°C 0mm 0.05kPa 24135m 1.9m/s 2.7m/s
05:00 ☾
82% -6.1°C 0mm 89% 0cm -17° -4.6°C 0mm 0.05kPa 24135m 2m/s 2.8m/s
06:00 ☾
83% -6.1°C 0mm 89% 0cm -9° -4.6°C 0mm 0.05kPa 24135m 2.7m/s 2.9m/s
07:00 ☾
71% -6.1°C 0mm 89% 0cm 0.36° -4.5°C 0mm 0.05kPa 24135m 2.8m/s 2.9m/s
08:00 ☾
59% -4.9°C 0mm 85% 0cm 9.3° -2.7°C 0mm 0.07kPa 24134m 3.2m/s 2.7m/s
09:00 ☾
47% -2.9°C 0mm 75% 0cm 19° 1.1°C 0mm 0.17kPa 24135m 2.6m/s 2m/s
10:00 ☾
46% -2.6°C 0mm 65% 0cm 28° 3.3°C 0mm 0.27kPa 24134m 2.2m/s 1.4m/s
11:00 ☾
44% -2.4°C 0mm 58% 0cm 36° 5.2°C 0mm 0.37kPa 24135m 2m/s 0.97m/s
12:00 ☾
43% -2°C 0mm 53% 0cm 42° 6.8°C 0mm 0.46kPa 24134m 1.9m/s 0.72m/s
13:00 ☾
50% -1.6°C 0mm 50% 0cm 46° 8.2°C 0mm 0.54kPa 24135m 1.9m/s 0.59m/s
14:00 ☾
57% -1.4°C 0mm 49% 0cm 47° 8.7°C 0mm 0.57kPa 24135m 2.2m/s 1.3m/s
15:00 ☾
64% -0.1°C 0mm 54% 0cm 44° 8.7°C 0mm 0.52kPa 24134m 1.7m/s 2m/s
16:00 ☾
62% 1.3°C 0mm 61% 0cm 39° 8.2°C 0mm 0.42kPa 24135m 1.4m/s 2.3m/s
17:00 ☾
60% 2.2°C 0mm 69% 0cm 31° 7.5°C 0mm 0.32kPa 24135m 1.3m/s 2.1m/s
18:00 ☾
58% 2.8°C 0mm 76% 0cm 22° 6.6°C 0mm 0.23kPa 24134m 1.6m/s 1.9m/s
19:00 ☾
47% 3.6°C 0mm 90% 0cm 13° 5.1°C 0mm 0.09kPa 24135m 1.8m/s 1.5m/s
20:00 ☾
36% 1.1°C 0mm 98% 0cm 3.7° 1.5°C 0mm 0.02kPa 18280m 0.4m/s 0.33m/s
21:00 ☾
25% -1°C 0mm 97% 0cm -5.5° -0.56°C 0mm 0.02kPa 17932m 1.3m/s 1.7m/s
22:00 ☾
20% -1.4°C 0mm 96% 0cm -14° -0.81°C 0mm 0.02kPa 24134m 1.5m/s 2m/s
23:00 ☾
15% -2°C 0mm 95% 0cm -21° -1.4°C 0mm 0.03kPa 24135m 1.5m/s 2m/s
Sat, Apr 11 Sunrise 06:53 Sunset 20:27
24:00 ☾
10% -2°C 0mm 94% 0cm -27° -1.2°C 0mm 0.03kPa 24135m 1.4m/s 1.8m/s
01:00 ☾
7% -2.3°C 0mm 94% 0cm -30° -1.4°C 0mm 0.03kPa 24134m 1.5m/s 1.9m/s
02:00 ☾
3% -2.6°C 0mm 94% 0cm -30° -1.8°C 0mm 0.03kPa 24134m 1.4m/s 1.9m/s
03:00 ☾
0% -2.2°C 0mm 95% 0cm -28° -1.5°C 0mm 0.03kPa 24134m 1.3m/s 1.8m/s
04:00 ☾
0% -1.9°C 0mm 95% 0cm -23° -1.3°C 0mm 0.03kPa 24135m 1.4m/s 1.8m/s
05:00 ☾
0% -1.8°C 0mm 96% 0cm -17° -1.2°C 0mm 0.02kPa 24135m 1.3m/s 1.6m/s
06:00 ☾
0% -2°C 0mm 96% 0cm -8.7° -1.5°C 0mm 0.02kPa 24134m 1m/s 1.3m/s
07:00 ☾
0% -0.8°C 0mm 92% 0cm 0.64° 0.32°C 0.02mm 0.05kPa 23330m 1.1m/s 1.6m/s
08:00 ☾
0% 0.3°C 0mm 88% 0cm 9.6° 2.2°C 0.04mm 0.09kPa 22525m 1.2m/s 1.8m/s
09:00 ☾
0% 1.4°C 0mm 83% 0cm 19° 4°C 0.06mm 0.14kPa 21721m 1.3m/s 2m/s
10:00 ☾
0% 1.4°C 0.02mm 88% 0.02cm 28° 3.3°C 0.19mm 0.1kPa 14621m 1.7m/s 1.9m/s
11:00 ☾
0% 1.3°C 0.04mm 92% 0.05cm 36° 2.5°C 0.31mm 0.06kPa 7522m 2.1m/s 1.7m/s
12:00 ☾
0% 1.3°C 0.06mm 96% 0.07cm 43° 1.8°C 0.44mm 0.03kPa 422m 2.5m/s 1.6m/s
13:00 ☾
0% 0.8°C 0.36mm 97% 0.37cm 47° 1.2°C 0.71mm 0.02kPa 289m 2.6m/s 1.6m/s
14:00 ☾
1% 0.3°C 0.66mm 99% 0.66cm 47° 0.51°C 0.98mm 0.01kPa 156m 2.7m/s 1.6m/s
15:00 ☾
1% -0.2°C 0.96mm 100% 0.96cm 45° -0.15°C 1.3mm 0kPa 23m 2.7m/s 1.5m/s
16:00 ☾
1% -0.4°C 0.74mm 100% 0.74cm 39° -0.39°C 2mm 0kPa 27m 2.4m/s 1.5m/s
17:00 ☾
0% -0.7°C 0.51mm 100% 0.52cm 31° -0.64°C 2.7mm 0kPa 30m 2.1m/s 1.4m/s
18:00 ☾
0% -0.9°C 0.29mm 100% 0.29cm 22° -0.88°C 3.4mm 0kPa 34m 1.8m/s 1.3m/s
19:00 ☾
0% -1.2°C 0.28mm 99% 0.28cm 13° -1.1°C 2.5mm 0kPa 58m 1.7m/s 1.2m/s
20:00 ☾
0% -1.5°C 0.26mm 99% 0.27cm 3.9° -1.3°C 1.5mm 0.01kPa 81m 1.6m/s 1.1m/s
21:00 ☾
0% -1.7°C 0.25mm 99% 0.26cm -5.3° -1.6°C 0.56mm 0.01kPa 104m 1.5m/s 1m/s
22:00 ☾
0% -1.8°C 0.31mm 99% 0.32cm -14° -1.7°C 1mm 0.01kPa 88m 1.8m/s 1.2m/s
23:00 ☾
0% -1.9°C 0.36mm 99% 0.38cm -21° -1.8°C 1.5mm 0.01kPa 72m 2m/s 1.4m/s
Sun, Apr 12 Sunrise 06:51 Sunset 20:29
24:00 ☾
0% -2°C 0.42mm 99% 0.44cm -26° -1.9°C 2mm 0kPa 56m 2.2m/s 1.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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