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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 Spread2.5°C
Visibility23194 (Clear)
Relative Humidity83%
Wind Speed1.7m/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
Today · 21:00–22:00 · 1h window
Medium confidence
50%
🌫️Fog Probability60.7%
Dewpoint Spread: 0.2°C
Visibility: 181 (Dense fog)
Relative Humidity: 98%
Wind Speed: 2.1m/s (calm conditions)
fog weather icon
Dense Fog
Kananaskis
Tomorrow · 01:00–06:00
🌫️Fog Probability:61.4-100%
High
fog weather icon
Moderate Fog at Sunrise
Kananaskis
Tomorrow · 06:00–07:00
🌫️Fog Probability:61.4%
Medium
fog weather icon
Moderate Fog
Kananaskis
Tomorrow · 20:00–22:00
🌫️Fog Probability:61.4-66.7%
Low
fog weather icon
Moderate Fog
Kananaskis
Fri, Apr 10 · 20:00–22:00
🌫️Fog Probability:66.7-88.6%
Medium
fog weather icon
Moderate Fog
Kananaskis
Sun, Apr 12 · 23:00–01:00
🌫️Fog Probability:60.1-61.4%
Low
fog weather icon
Dense Fog
Kananaskis
Mon, Apr 13 · 15:00–21:00
🌫️Fog Probability:66.7-88.5%
Medium
+2 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 92 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Edmonton
Fog Probability
≥ 60.0%
Tue, Apr 7
22:000%
23:000%
Wed, Apr 8
24:000%
01:0061%
02:0061%
03:0046%
04:0046%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:0012%
17:000%
18:000%
19:000%
20:000%
21:0061%
22:000%
23:000%
Thu, Apr 9
24:000%
01:00100%
02:0096%
03:0089%
04:0078%
05:0061%
06:0061%
07:0046%
08:000%
09:000%
10:000%
11:000%
12:0021%
13:0016%
14:0010%
15:0012%
16:000%
17:000%
18:000%
19:000%
20:0061%
21:0067%
22:0053%
23:0043%
Fri, Apr 10
24:0043%
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%
21:0067%
22:0057%
23:0043%
Sat, Apr 11
24:0043%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:0033%
13:0042%
14:0049%
15:0053%
16:000%
17:000%
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
Wed, Apr 8 Sunrise 06:57 Sunset 20:24
19:00 ☾
0% -3.5°C 0mm 83% 0cm 12° -1°C 0mm 0.09kPa 23194m 1.7m/s 1.7m/s
20:00 ☾
0% -3.3°C 0.02mm 93% 0.13cm 3.2° -2.3°C 0.13mm 0.04kPa 8709m 2.3m/s 1.8m/s
21:00 ☾
0% -3.3°C 0.32mm 98% 0.43cm -6.1° -3.1°C 0.38mm 0.01kPa 181m 3.2m/s 2.1m/s
22:00 ☾
0% -3.7°C 0.57mm 98% 0.62cm -15° -3.4°C 1mm 0.01kPa 106m 3.1m/s 2m/s
23:00 ☾
0% -4.1°C 0.18mm 97% 0.19cm -22° -3.7°C 1.4mm 0.01kPa 267m 1.9m/s 1.4m/s
Thu, Apr 9 Sunrise 06:57 Sunset 20:24
24:00 ☾
0% -5.2°C 0.02mm 99% 0cm -27° -5.1°C 1.5mm 0kPa 8372m 0.4m/s 0.42m/s
01:00 ☾
3% -7°C 0mm 99% 0cm -31° -6.9°C 0mm 0kPa 5765m 1m/s 1.2m/s
02:00 ☾
7% -7.4°C 0mm 98% 0cm -31° -7.2°C 0mm 0.01kPa 5061m 1.3m/s 1.6m/s
03:00 ☾
10% -8°C 0mm 97% 0cm -29° -7.7°C 0mm 0.01kPa 15659m 1.3m/s 1.7m/s
04:00 ☾
9% -8.5°C 0mm 96% 0cm -24° -8°C 0mm 0.01kPa 19362m 1.5m/s 1.8m/s
05:00 ☾
9% -8.7°C 0mm 96% 0cm -17° -8.2°C 0mm 0.01kPa 22780m 1.4m/s 1.8m/s
06:00 ☾
8% -8.8°C 0mm 96% 0cm -9.4° -8.2°C 0mm 0.01kPa 22614m 1.3m/s 1.6m/s
07:00 ☾
6% -8.5°C 0.01mm 95% 0cm 0.08° -7.8°C 0mm 0.02kPa 15564m 1.3m/s 1.6m/s
08:00 ☾
3% -7°C 0.02mm 90% 0cm 9° -5.6°C 0mm 0.04kPa 5418m 0.91m/s 0.84m/s
09:00 ☾
1% -5.5°C 0.03mm 86% 0cm 18° -3.5°C 0mm 0.06kPa 5301m 1m/s 0.59m/s
10:00 ☾
1% -4.6°C 0.03mm 82% 0.05cm 27° -2°C 0.06mm 0.09kPa 8884m 1.3m/s 1.2m/s
11:00 ☾
0% -4.2°C 0.03mm 78% 0.07cm 35° -0.93°C 0.13mm 0.12kPa 10278m 1.6m/s 1.3m/s
12:00 ☾
0% -3.3°C 0.1mm 85% 0.14cm 42° -1.2°C 0.19mm 0.08kPa 1751m 1.3m/s 1.8m/s
13:00 ☾
0% -2.5°C 0.09mm 82% 0.17cm 46° 0.17°C 0.13mm 0.11kPa 2398m 1.2m/s 1.9m/s
14:00 ☾
0% -2°C 0.09mm 85% 0.15cm 47° 0.18°C 0.31mm 0.09kPa 972m 1.7m/s 2.2m/s
15:00 ☾
0% -1.8°C 0.09mm 87% 0.13cm 44° 0.17°C 0.44mm 0.08kPa 1538m 1.7m/s 2.1m/s
16:00 ☾
0% -1.7°C 0.02mm 81% 0.05cm 38° 1.2°C 0.5mm 0.13kPa 9921m 1.5m/s 1.8m/s
17:00 ☾
0% -2°C 0.01mm 79% 0.03cm 31° 1.3°C 0.56mm 0.14kPa 15054m 1.4m/s 1.7m/s
18:00 ☾
0% -2°C 0mm 79% 0cm 22° 1.2°C 0.56mm 0.14kPa 22616m 1.5m/s 1.5m/s
19:00 ☾
2% -1.7°C 0mm 83% 0cm 13° 0.85°C 0mm 0.11kPa 24134m 1.6m/s 1.4m/s
20:00 ☾
3% -2.4°C 0mm 96% 0cm 3.5° -1.8°C 0mm 0.02kPa 24134m 0.9m/s 0.9m/s
21:00 ☾
5% -4.6°C 0mm 96% 0cm -5.8° -4.1°C 0mm 0.02kPa 24135m 1.5m/s 1.9m/s
22:00 ☾
21% -4.9°C 0mm 95% 0cm -14° -4.3°C 0mm 0.02kPa 24134m 1.7m/s 2.1m/s
23:00 ☾
36% -5.4°C 0mm 94% 0cm -22° -4.5°C 0mm 0.03kPa 24134m 1.7m/s 2.2m/s
Fri, Apr 10 Sunrise 06:55 Sunset 20:26
24:00 ☾
52% -5.6°C 0mm 92% 0cm -27° -4.6°C 0mm 0.03kPa 24135m 1.8m/s 2.3m/s
01:00 ☾
60% -5.7°C 0mm 92% 0cm -30° -4.6°C 0mm 0.04kPa 24134m 1.8m/s 2.4m/s
02:00 ☾
68% -5.8°C 0mm 91% 0cm -31° -4.6°C 0mm 0.04kPa 24134m 1.8m/s 2.4m/s
03:00 ☾
76% -6°C 0mm 90% 0cm -29° -4.6°C 0mm 0.04kPa 24135m 1.8m/s 2.5m/s
04:00 ☾
78% -6°C 0mm 90% 0cm -24° -4.6°C 0mm 0.04kPa 24135m 1.9m/s 2.6m/s
05:00 ☾
80% -6.1°C 0mm 89% 0cm -17° -4.6°C 0mm 0.05kPa 24134m 2m/s 2.8m/s
06:00 ☾
82% -6°C 0mm 89% 0cm -9° -4.4°C 0mm 0.05kPa 24134m 2.7m/s 2.9m/s
07:00 ☾
77% -6.1°C 0mm 89% 0cm 0.36° -4.5°C 0mm 0.05kPa 24134m 2.8m/s 3m/s
08:00 ☾
72% -4.8°C 0mm 85% 0cm 9.3° -2.6°C 0mm 0.08kPa 24134m 3.3m/s 2.7m/s
09:00 ☾
67% -2.9°C 0mm 75% 0cm 19° 1.1°C 0mm 0.17kPa 24134m 2.8m/s 2.1m/s
10:00 ☾
67% -2.5°C 0mm 65% 0cm 28° 3.4°C 0mm 0.27kPa 24134m 2.5m/s 1.6m/s
11:00 ☾
68% -2.3°C 0mm 58% 0cm 36° 5.4°C 0mm 0.38kPa 24135m 2.3m/s 1.1m/s
12:00 ☾
68% -2°C 0mm 53% 0cm 42° 7.1°C 0mm 0.48kPa 24135m 1.9m/s 0.66m/s
13:00 ☾
70% -1.7°C 0mm 49% 0cm 46° 8.3°C 0mm 0.55kPa 24135m 1.8m/s 0.48m/s
14:00 ☾
72% -1.5°C 0mm 48% 0cm 47° 9°C 0mm 0.6kPa 24134m 2.1m/s 0.99m/s
15:00 ☾
74% -0.4°C 0mm 51% 0cm 44° 9.2°C 0mm 0.57kPa 24135m 1.8m/s 1.6m/s
16:00 ☾
76% 1.1°C 0mm 59% 0cm 39° 8.7°C 0mm 0.46kPa 24134m 1.5m/s 2.1m/s
17:00 ☾
78% 2.2°C 0mm 68% 0cm 31° 7.8°C 0mm 0.34kPa 24135m 1.6m/s 2.1m/s
18:00 ☾
80% 2.8°C 0mm 76% 0cm 22° 6.8°C 0mm 0.24kPa 24134m 1.5m/s 1.9m/s
19:00 ☾
63% 3.7°C 0mm 90% 0cm 13° 5.3°C 0mm 0.09kPa 24134m 1.7m/s 1.4m/s
20:00 ☾
45% 1°C 0mm 97% 0cm 3.7° 1.4°C 0mm 0.02kPa 24134m 0.4m/s 0.4m/s
21:00 ☾
28% -1.1°C 0mm 96% 0cm -5.5° -0.54°C 0mm 0.02kPa 24135m 1.3m/s 1.7m/s
22:00 ☾
22% -1.3°C 0mm 95% 0cm -14° -0.64°C 0mm 0.03kPa 24135m 1.5m/s 2m/s
23:00 ☾
15% -1.8°C 0mm 94% 0cm -21° -1°C 0mm 0.03kPa 24135m 1.5m/s 2m/s
Sat, Apr 11 Sunrise 06:53 Sunset 20:27
24:00 ☾
9% -2°C 0mm 93% 0cm -27° -1.1°C 0mm 0.04kPa 24135m 1.6m/s 2.1m/s
01:00 ☾
6% -1.3°C 0mm 92% 0cm -30° -0.24°C 0mm 0.05kPa 24135m 1.3m/s 1.6m/s
02:00 ☾
3% -0.6°C 0mm 91% 0cm -30° 0.62°C 0mm 0.06kPa 24135m 1.1m/s 1.1m/s
03:00 ☾
0% 0.1°C 0mm 90% 0cm -28° 1.5°C 0mm 0.07kPa 24135m 0.83m/s 0.66m/s
04:00 ☾
0% 0.1°C 0mm 86% 0cm -23° 2.3°C 0mm 0.1kPa 24135m 1.1m/s 1.1m/s
05:00 ☾
0% 0.1°C 0mm 81% 0cm -17° 3°C 0mm 0.14kPa 24135m 1.3m/s 1.4m/s
06:00 ☾
0% 0.1°C 0mm 77% 0cm -8.7° 3.8°C 0mm 0.19kPa 24135m 1.6m/s 1.8m/s
07:00 ☾
0% 0.4°C 0mm 80% 0cm 0.64° 3.6°C 0.02mm 0.16kPa 22762m 1.7m/s 1.9m/s
08:00 ☾
0% 0.7°C 0mm 82% 0cm 9.6° 3.5°C 0.04mm 0.14kPa 21388m 1.7m/s 2m/s
09:00 ☾
0% 1°C 0mm 85% 0cm 19° 3.3°C 0.06mm 0.12kPa 20015m 1.7m/s 2.1m/s
10:00 ☾
0% 1°C 0.04mm 89% 0.05cm 28° 2.7°C 0.15mm 0.08kPa 13487m 2m/s 2m/s
11:00 ☾
0% 0.9°C 0.08mm 92% 0.1cm 36° 2°C 0.23mm 0.05kPa 6960m 2.2m/s 1.9m/s
12:00 ☾
0% 0.8°C 0.12mm 96% 0.14cm 43° 1.4°C 0.31mm 0.03kPa 432m 2.5m/s 1.9m/s
13:00 ☾
0% 0.5°C 0.24mm 97% 0.25cm 47° 0.91°C 0.44mm 0.02kPa 296m 2.5m/s 1.7m/s
14:00 ☾
1% 0.2°C 0.35mm 98% 0.36cm 47° 0.41°C 0.56mm 0.01kPa 161m 2.6m/s 1.5m/s
15:00 ☾
1% -0.1°C 0.47mm 100% 0.47cm 45° -0.08°C 0.69mm 0kPa 25m 2.6m/s 1.4m/s
16:00 ☾
1% -0.4°C 0.47mm 100% 0.47cm 39° -0.32°C 1.2mm 0kPa 26m 2.3m/s 1.4m/s
17:00 ☾
0% -0.6°C 0.47mm 100% 0.47cm 31° -0.56°C 1.6mm 0kPa 28m 2.1m/s 1.4m/s
18:00 ☾
0% -0.9°C 0.47mm 100% 0.48cm 22° -0.79°C 2.1mm 0kPa 29m 1.8m/s 1.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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