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Rule Fog Hunter

Cochrane - Fog Hunter - Canadian Rockies

Cochrane, Alberta, 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
Fog Probability
0%
Dewpoint Spread4.6°C
Visibility24134 (Clear)
Relative Humidity73%
Wind Speed2.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Edmonton

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/Edmonton
Fog Probability
≥ 75.0%
Tue, Jul 7
22:000%
23:000%
Wed, Jul 8
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%
22:0055%
23:0071%
Thu, Jul 9
24:0071%
01:0073%
02:0055%
03:000%
04:000%
05:000%
06:000%
07:0055%
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%
Fri, Jul 10
24:000%
01:0055%
02:0055%
03:0055%
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%
Sat, Jul 11
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
Wed, Jul 8 Sunrise 05:33 Sunset 21:52
07:00
29% 7.5°C 0mm 73% 0cm 11° 12°C 0mm 0.37kPa 24134m 2.1m/s 2.2m/s
08:00
15% 9°C 0mm 73% 0cm 20° 14°C 0mm 0.43kPa 24135m 2.5m/s 2.2m/s
09:00
1% 11°C 0mm 68% 0cm 29° 16°C 0mm 0.6kPa 24135m 3.6m/s 2.2m/s
10:00
1% 11°C 0mm 60% 0cm 39° 19°C 0mm 0.9kPa 24135m 4.5m/s 2.4m/s
11:00
0% 12°C 0mm 53% 0cm 47° 22°C 0mm 1.3kPa 24135m 4m/s 1.9m/s
12:00
0% 11°C 0mm 43% 0cm 55° 24°C 0mm 1.7kPa 24134m 3m/s 1m/s
13:00
0% 10°C 0mm 40% 0cm 60° 25°C 0mm 1.9kPa 24134m 4m/s 1.2m/s
14:00
1% 13°C 0mm 50% 0cm 61° 24°C 0mm 1.5kPa 24134m 6.2m/s 4.5m/s
15:00
1% 15°C 0mm 66% 0cm 58° 22°C 0mm 0.89kPa 24135m 8.2m/s 6.8m/s
16:00
1% 15°C 0mm 79% 0cm 51° 19°C 0.25mm 0.45kPa 24100m 10m/s 9.5m/s
17:00
0% 14°C 0mm 86% 0cm 42° 17°C 0.63mm 0.26kPa 24134m 9.8m/s 8.5m/s
18:00 ☾
0% 14°C 0mm 83% 0cm 33° 17°C 0.69mm 0.34kPa 24135m 7.5m/s 6.7m/s
19:00 ☾
13% 13°C 0mm 83% 0cm 24° 16°C 0mm 0.32kPa 24135m 6.6m/s 5.9m/s
20:00 ☾
26% 13°C 0mm 87% 0cm 15° 15°C 0mm 0.22kPa 24135m 6.4m/s 4.5m/s
21:00 ☾
39% 13°C 0mm 93% 0cm 6.2° 14°C 0mm 0.11kPa 24134m 7.1m/s 4m/s
22:00 ☾
33% 11°C 0mm 97% 0cm -1.5° 11°C 0mm 0.05kPa 24134m 2.7m/s 2.1m/s
23:00 ☾
27% 10°C 0mm 97% 0cm -8.2° 11°C 0mm 0.03kPa 24134m 1.7m/s 1.7m/s
Thu, Jul 9 Sunrise 05:34 Sunset 21:51
24:00 ☾
21% 9.6°C 0mm 98% 0cm -13° 10°C 0mm 0.03kPa 24135m 1.4m/s 1.4m/s
01:00 ☾
15% 9.8°C 0mm 98% 0cm -16° 10°C 0mm 0.02kPa 24135m 0.91m/s 0.89m/s
02:00 ☾
9% 11°C 0mm 95% 0cm -16° 12°C 0mm 0.07kPa 24134m 0.42m/s 0.3m/s
03:00 ☾
3% 11°C 0mm 94% 0cm -15° 12°C 0mm 0.09kPa 24135m 0.3m/s 0.25m/s
04:00 ☾
2% 11°C 0mm 91% 0cm -11° 12°C 0mm 0.13kPa 24134m 1.8m/s 1.6m/s
05:00 ☾
1% 11°C 0mm 89% 0cm -4.7° 12°C 0mm 0.15kPa 24135m 3.5m/s 2.5m/s
06:00
0% 11°C 0mm 94% 0cm 2.8° 12°C 0mm 0.08kPa 24135m 3.9m/s 2.2m/s
07:00
0% 11°C 0mm 96% 0cm 11° 12°C 0mm 0.05kPa 24134m 4.7m/s 2.2m/s
08:00
0% 11°C 0mm 93% 0cm 20° 12°C 0mm 0.1kPa 24135m 5.5m/s 3.5m/s
09:00
0% 11°C 0mm 89% 0cm 29° 13°C 0mm 0.16kPa 24135m 5.7m/s 3.5m/s
10:00
0% 12°C 0mm 84% 0cm 38° 14°C 0mm 0.25kPa 24134m 5.2m/s 4.3m/s
11:00
0% 12°C 0mm 78% 0cm 47° 16°C 0mm 0.4kPa 24135m 4.8m/s 4.2m/s
12:00
0% 13°C 0mm 71% 0cm 55° 18°C 0mm 0.59kPa 24135m 3.3m/s 2.8m/s
13:00
3% 13°C 0mm 68% 0cm 60° 19°C 0mm 0.71kPa 24134m 2.6m/s 3.8m/s
14:00
5% 13°C 0mm 66% 0cm 61° 20°C 0.06mm 0.79kPa 24135m 4.8m/s 5m/s
15:00
8% 14°C 0mm 66% 0cm 57° 20°C 0.5mm 0.8kPa 24135m 5.3m/s 5.3m/s
16:00
7% 15°C 0mm 75% 0cm 51° 20°C 1.4mm 0.58kPa 8064m 5.9m/s 5.5m/s
17:00
5% 15°C 0mm 74% 0cm 42° 20°C 2mm 0.6kPa 24103m 5.7m/s 5.5m/s
18:00 ☾
4% 15°C 0.01mm 81% 0cm 33° 19°C 3.1mm 0.41kPa 8915m 5.3m/s 4.8m/s
19:00 ☾
7% 15°C 0mm 82% 0cm 24° 18°C 0.38mm 0.37kPa 10841m 5.4m/s 4.3m/s
20:00 ☾
9% 14°C 0mm 84% 0cm 15° 16°C 0.81mm 0.3kPa 13031m 7.2m/s 4.1m/s
21:00 ☾
12% 12°C 0mm 88% 0cm 6.1° 14°C 1.3mm 0.2kPa 24134m 8.6m/s 4.9m/s
22:00 ☾
9% 12°C 0mm 94% 0cm -1.6° 12°C 1.5mm 0.08kPa 24101m 8.6m/s 3.9m/s
23:00 ☾
5% 11°C 0mm 96% 0cm -8.3° 11°C 1.5mm 0.05kPa 24134m 6.1m/s 3m/s
Fri, Jul 10 Sunrise 05:35 Sunset 21:51
24:00 ☾
2% 9.3°C 0mm 97% 0cm -13° 9.8°C 1.5mm 0.04kPa 24135m 1.3m/s 1.4m/s
01:00 ☾
5% 9°C 0mm 97% 0cm -16° 9.5°C 0mm 0.04kPa 24134m 1.4m/s 1.4m/s
02:00 ☾
8% 8.7°C 0mm 96% 0cm -16° 9.4°C 0mm 0.05kPa 24134m 1.2m/s 1.2m/s
03:00 ☾
11% 8.7°C 0mm 95% 0cm -15° 9.5°C 0mm 0.06kPa 24135m 1m/s 1m/s
04:00 ☾
12% 8.7°C 0mm 94% 0cm -11° 9.6°C 0mm 0.07kPa 24134m 0.9m/s 0.88m/s
05:00 ☾
13% 8.6°C 0mm 94% 0cm -4.8° 9.6°C 0mm 0.07kPa 24134m 1.1m/s 1.1m/s
06:00
14% 9°C 0mm 94% 0cm 2.6° 10°C 0mm 0.07kPa 24134m 1.3m/s 1.3m/s
07:00
26% 10°C 0mm 94% 0cm 11° 11°C 0mm 0.08kPa 24135m 2.8m/s 1.6m/s
08:00
39% 11°C 0mm 93% 0cm 20° 12°C 0mm 0.1kPa 24134m 4.2m/s 1.9m/s
09:00
51% 12°C 0mm 91% 0cm 29° 13°C 0mm 0.13kPa 24134m 5.4m/s 2.8m/s
10:00
54% 12°C 0mm 88% 0cm 38° 14°C 0mm 0.19kPa 24135m 7m/s 4.2m/s
11:00
57% 13°C 0mm 80% 0cm 47° 17°C 0mm 0.38kPa 24135m 7m/s 5.3m/s
12:00
60% 13°C 0mm 74% 0cm 55° 18°C 0mm 0.55kPa 24135m 6.4m/s 5.6m/s
13:00
66% 12°C 0mm 69% 0cm 60° 18°C 0mm 0.63kPa 24135m 5.5m/s 4.7m/s
14:00
72% 11°C 0mm 65% 0cm 61° 18°C 0mm 0.71kPa 24135m 4.5m/s 3.8m/s
15:00
78% 10°C 0mm 61% 0cm 57° 18°C 0mm 0.78kPa 24135m 3.6m/s 3m/s
16:00
74% 8.4°C 0mm 60% 0cm 51° 16°C 0mm 0.74kPa 24135m 3.1m/s 2.8m/s
17:00
70% 6.7°C 0mm 58% 0cm 42° 15°C 0mm 0.71kPa 24135m 2.6m/s 2.6m/s
18:00 ☾
66% 5°C 0mm 56% 0cm 33° 13°C 0mm 0.67kPa 24135m 2m/s 2.4m/s
19:00 ☾
69% 5°C 0mm 58% 0cm 24° 13°C 0mm 0.62kPa 24135m 2m/s 2.3m/s
20:00 ☾
73% 4.9°C 0mm 60% 0cm 15° 12°C 0mm 0.58kPa 24135m 1.9m/s 2.2m/s
21:00 ☾
76% 4.8°C 0mm 62% 0cm 6° 12°C 0mm 0.54kPa 24135m 1.8m/s 2.1m/s
22:00 ☾
77% 5°C 0mm 64% 0cm -1.7° 12°C 0mm 0.48kPa 24135m 1.8m/s 2m/s
23:00 ☾
77% 5.2°C 0mm 67% 0cm -8.4° 11°C 0mm 0.44kPa 24135m 1.7m/s 2m/s
Sat, Jul 11 Sunrise 05:36 Sunset 21:50
24:00 ☾
78% 5.3°C 0mm 70% 0cm -13° 11°C 0mm 0.39kPa 24135m 1.6m/s 1.9m/s
01:00 ☾
74% 6.8°C 0mm 67% 0cm -16° 13°C 0mm 0.48kPa 24135m 1.7m/s 1.6m/s
02:00 ☾
69% 8.2°C 0mm 65% 0cm -17° 15°C 0mm 0.59kPa 24135m 1.7m/s 1.4m/s
03:00 ☾
65% 9.7°C 0mm 63% 0cm -15° 17°C 0mm 0.71kPa 24135m 1.7m/s 1.2m/s
04:00 ☾
62% 10°C 0mm 58% 0cm -11° 19°C 0mm 0.91kPa 24135m 3.2m/s 2m/s
05:00 ☾
60% 11°C 0mm 53% 0cm -4.9° 21°C 0mm 1.1kPa 24135m 4.6m/s 2.9m/s
06:00
57% 11°C 0mm 48% 0cm 2.5° 22°C 0mm 1.4kPa 24135m 6m/s 3.8m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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