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Rule Fog Hunter

Invermere - Fog Hunter - Canadian Rockies

Invermere, 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
Fog Probability
0%
Dewpoint Spread3.5°C
Visibility24135 (Clear)
Relative Humidity78%
Wind Speed0.7m/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%
Sat, May 23
22:000%
23:000%
Sun, May 24
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%
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%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, May 27
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
Sun, May 24 Sunrise 05:45 Sunset 21:37
07:00
8% 3°C 0mm 78% 0cm 9.8° 6.5°C 0mm 0.21kPa 24135m 1.5m/s 0.66m/s
08:00
13% 2.9°C 0mm 65% 0cm 19° 9.1°C 0mm 0.4kPa 24135m 0.61m/s 0.28m/s
09:00
18% 2.7°C 0mm 56% 0cm 28° 11°C 0mm 0.59kPa 24134m 0.7m/s 0.44m/s
10:00
14% 2.4°C 0mm 48% 0cm 38° 13°C 0mm 0.79kPa 24134m 1m/s 0.58m/s
11:00
11% 2°C 0mm 40% 0cm 47° 15°C 0mm 1.1kPa 24134m 2.1m/s 1.2m/s
12:00
7% 1.4°C 0mm 34% 0cm 54° 17°C 0mm 1.3kPa 24134m 4.5m/s 1.6m/s
13:00
7% 0.6°C 0mm 29% 0cm 59° 19°C 0mm 1.5kPa 24135m 5.2m/s 2.2m/s
14:00
7% -0.5°C 0mm 26% 0cm 60° 19°C 0mm 1.6kPa 24134m 4.5m/s 1.8m/s
15:00
7% -0.9°C 0mm 26% 0cm 57° 19°C 0mm 1.7kPa 24135m 5.7m/s 3.7m/s
16:00
5% -0.7°C 0mm 27% 0cm 50° 19°C 0mm 1.6kPa 24134m 5.7m/s 3.7m/s
17:00
2% -0.9°C 0mm 26% 0cm 41° 19°C 0mm 1.6kPa 24135m 5.6m/s 2.4m/s
18:00 ☾
0% -1°C 0mm 26% 0cm 32° 19°C 0mm 1.6kPa 24135m 5.3m/s 2.4m/s
19:00 ☾
0% -0.5°C 0mm 28% 0cm 22° 18°C 0mm 1.5kPa 24135m 3.9m/s 2.2m/s
20:00 ☾
0% 2.4°C 0mm 38% 0cm 13° 17°C 0mm 1.2kPa 24135m 1.3m/s 1.3m/s
21:00 ☾
0% 2.2°C 0mm 46% 0cm 4.5° 14°C 0mm 0.86kPa 24135m 1.3m/s 1.5m/s
22:00 ☾
0% 1.9°C 0mm 52% 0cm -3.5° 11°C 0mm 0.64kPa 24134m 1.3m/s 1.5m/s
23:00 ☾
0% 2.2°C 0mm 59% 0cm -10° 10°C 0mm 0.51kPa 24134m 1m/s 1.1m/s
Mon, May 25 Sunrise 05:43 Sunset 21:39
24:00 ☾
0% 2.5°C 0mm 63% 0cm -15° 9.2°C 0mm 0.43kPa 24134m 0.7m/s 0.54m/s
01:00 ☾
2% 3°C 0mm 68% 0cm -18° 8.5°C 0mm 0.36kPa 24135m 1.2m/s 0.99m/s
02:00 ☾
4% 3.4°C 0mm 73% 0cm -18° 8°C 0mm 0.29kPa 24134m 1.5m/s 1.3m/s
03:00 ☾
6% 3.7°C 0mm 76% 0cm -16° 7.6°C 0mm 0.25kPa 24135m 1.6m/s 1.6m/s
04:00 ☾
8% 3.8°C 0mm 79% 0cm -12° 7.2°C 0mm 0.22kPa 24135m 1.9m/s 1.9m/s
05:00 ☾
10% 3.8°C 0mm 81% 0cm -6.1° 6.8°C 0mm 0.19kPa 24134m 2.9m/s 2.1m/s
06:00
12% 3.7°C 0mm 83% 0cm 1.7° 6.3°C 0mm 0.16kPa 24135m 4.3m/s 2.3m/s
07:00
34% 4°C 0mm 77% 0cm 9.9° 7.8°C 0mm 0.24kPa 24134m 5.7m/s 2.2m/s
08:00
55% 3.9°C 0mm 65% 0cm 19° 10°C 0mm 0.43kPa 24134m 5.3m/s 3.3m/s
09:00
77% 4°C 0mm 58% 0cm 29° 12°C 0mm 0.59kPa 24134m 5.4m/s 3.7m/s
10:00
77% 3.7°C 0mm 48% 0cm 38° 14°C 0mm 0.85kPa 24134m 5.4m/s 4m/s
11:00
78% 2.8°C 0mm 40% 0cm 47° 17°C 0mm 1.1kPa 24135m 5.7m/s 4.7m/s
12:00
78% 2.1°C 0mm 33% 0cm 54° 19°C 0mm 1.4kPa 24134m 7.5m/s 4.8m/s
13:00
67% -0.7°C 0mm 23% 0cm 59° 21°C 0mm 1.9kPa 24135m 9.7m/s 4.8m/s
14:00
55% -1.8°C 0mm 21% 0cm 60° 22°C 0mm 2.1kPa 24134m 9.5m/s 4.6m/s
15:00
44% -2°C 0mm 21% 0cm 57° 22°C 0mm 2kPa 24135m 8.5m/s 4.7m/s
16:00
35% -2.2°C 0mm 20% 0cm 50° 22°C 0mm 2.1kPa 24134m 8.7m/s 5.1m/s
17:00
27% -3°C 0mm 19% 0cm 41° 21°C 0mm 2.1kPa 24134m 9.5m/s 5.5m/s
18:00 ☾
18% -1.9°C 0mm 22% 0cm 32° 21°C 0mm 1.9kPa 24135m 10m/s 5.5m/s
19:00 ☾
14% -0.5°C 0mm 26% 0cm 23° 19°C 0mm 1.6kPa 24134m 7.9m/s 4.8m/s
20:00 ☾
10% 1.5°C 0mm 34% 0cm 13° 18°C 0mm 1.4kPa 24135m 5.9m/s 3m/s
21:00 ☾
6% 2.1°C 0mm 43% 0cm 4.6° 15°C 0mm 0.95kPa 24134m 1.6m/s 1.7m/s
22:00 ☾
5% 1.1°C 0.01mm 46% 0cm -3.3° 13°C 0mm 0.79kPa 24134m 2m/s 2.1m/s
23:00 ☾
3% 1.9°C 0.03mm 46% 0cm -10° 13°C 0mm 0.83kPa 24134m 1.1m/s 1.3m/s
Tue, May 26 Sunrise 05:42 Sunset 21:40
24:00 ☾
2% 4.8°C 0mm 64% 0cm -15° 11°C 0.31mm 0.47kPa 24135m 2.6m/s 2.2m/s
01:00 ☾
4% 5.1°C 0mm 74% 0cm -18° 9.4°C 0mm 0.3kPa 24134m 1.2m/s 1.4m/s
02:00 ☾
7% 5.6°C 0.06mm 72% 0cm -18° 10°C 0mm 0.35kPa 24135m 2.3m/s 1.8m/s
03:00 ☾
9% 7.3°C 0.02mm 85% 0cm -16° 9.8°C 1.1mm 0.18kPa 24134m 1.4m/s 1.2m/s
04:00 ☾
7% 7.1°C 0mm 84% 0cm -12° 9.7°C 1.1mm 0.19kPa 24135m 1.2m/s 1.4m/s
05:00 ☾
4% 6.9°C 0mm 83% 0cm -6° 9.6°C 1.1mm 0.2kPa 24134m 0.6m/s 0.57m/s
06:00
2% 6.3°C 0mm 86% 0cm 1.8° 8.6°C 1.1mm 0.16kPa 24134m 0.52m/s 0.39m/s
07:00
1% 6.7°C 0mm 83% 0cm 10° 9.4°C 0mm 0.2kPa 24134m 0.6m/s 0.62m/s
08:00
1% 6.7°C 0mm 75% 0cm 19° 11°C 0mm 0.32kPa 24135m 0.43m/s 0.42m/s
09:00
0% 6.8°C 0mm 67% 0cm 29° 13°C 0mm 0.48kPa 24135m 0.91m/s 0.47m/s
10:00
0% 7.1°C 0mm 60% 0cm 38° 15°C 0mm 0.68kPa 24134m 1.2m/s 0.62m/s
11:00
0% 7.1°C 0mm 54% 0cm 47° 17°C 0mm 0.88kPa 24135m 1.6m/s 0.87m/s
12:00
0% 7°C 0mm 50% 0cm 55° 18°C 0mm 1kPa 24134m 1.7m/s 1.1m/s
13:00
5% 9°C 0.15mm 64% 0cm 60° 16°C 3.1mm 0.64kPa 24134m 1.5m/s 0.75m/s
14:00
9% 10°C 0.31mm 79% 0cm 60° 14°C 6.2mm 0.34kPa 24135m 1.2m/s 0.4m/s
15:00
14% 11°C 0.46mm 94% 0cm 57° 12°C 9.3mm 0.09kPa 24135m 1m/s 0.04m/s
16:00
11% 11°C 0.32mm 94% 0cm 50° 12°C 9.4mm 0.09kPa 24135m 0.9m/s 0.26m/s
17:00
7% 11°C 0.18mm 94% 0cm 42° 12°C 9.5mm 0.09kPa 24135m 0.8m/s 0.49m/s
18:00 ☾
4% 11°C 0.04mm 94% 0cm 32° 12°C 9.6mm 0.08kPa 24135m 0.7m/s 0.71m/s
19:00 ☾
3% 11°C 0.46mm 95% 0cm 23° 11°C 6.7mm 0.07kPa 19691m 0.88m/s 0.93m/s
20:00 ☾
1% 10°C 0.89mm 95% 0cm 13° 11°C 3.8mm 0.06kPa 15246m 1.1m/s 1.1m/s
21:00 ☾
0% 10°C 1.3mm 96% 0cm 4.8° 11°C 0.81mm 0.05kPa 10802m 1.2m/s 1.3m/s
22:00 ☾
0% 10°C 0.92mm 96% 0cm -3.2° 11°C 2.2mm 0.05kPa 15246m 2.6m/s 1.7m/s
23:00 ☾
0% 10°C 0.52mm 97% 0cm -9.8° 11°C 3.6mm 0.04kPa 19691m 4m/s 2.1m/s
Wed, May 27 Sunrise 05:41 Sunset 21:41
24:00 ☾
0% 10°C 0.13mm 97% 0cm -15° 11°C 4.9mm 0.03kPa 24135m 5.4m/s 2.5m/s
01:00 ☾
1% 10°C 0.1mm 96% 0cm -18° 11°C 3.4mm 0.05kPa 24135m 5m/s 2.2m/s
02:00 ☾
1% 10°C 0.06mm 95% 0cm -18° 11°C 1.8mm 0.06kPa 24135m 4.5m/s 1.9m/s
03:00 ☾
2% 10°C 0.03mm 94% 0cm -16° 11°C 0.19mm 0.08kPa 24135m 4m/s 1.5m/s
04:00 ☾
2% 11°C 0.02mm 87% 0cm -12° 13°C 0.19mm 0.19kPa 24135m 3.5m/s 1.6m/s
05:00 ☾
1% 11°C 0.02mm 80% 0cm -5.8° 14°C 0.19mm 0.31kPa 24135m 3m/s 1.6m/s
06:00
1% 10°C 0.01mm 73% 0cm 1.9° 15°C 0.19mm 0.46kPa 24135m 2.5m/s 1.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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