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Rule Fog Hunter

Valemount - Fog Hunter - Canadian Rockies

Valemount, 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 Spread4.1°C
Visibility20852 (Clear)
Relative Humidity76%
Wind Speed2.3m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/Vancouver

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/Vancouver
Fog Probability
≥ 75.0%
Tue, Jul 7
21:000%
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%
22:000%
23:000%
Thu, Jul 9
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%
Fri, Jul 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%
20:000%
21:000%
22:000%
23:000%
Sat, Jul 11
24:000%
01:000%
02:000%
03:000%
04:000%
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/Vancouver
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 04:43 Sunset 21:20
06:00
0% 6.1°C 0.37mm 76% 0cm 9° 10°C 0.19mm 0.3kPa 20852m 3.3m/s 2.3m/s
07:00
1% 8.1°C 1.3mm 91% 0cm 17° 9.5°C 1.5mm 0.1kPa 9537m 0.72m/s 0.61m/s
08:00
1% 8.4°C 0mm 88% 0cm 26° 10°C 2.1mm 0.15kPa 15641m 2.2m/s 1.4m/s
09:00
3% 8.5°C 0mm 76% 0cm 35° 13°C 2.6mm 0.35kPa 14398m 2.9m/s 1.8m/s
10:00
5% 7°C 0mm 61% 0cm 44° 14°C 2.9mm 0.63kPa 17276m 3.6m/s 2.2m/s
11:00
7% 4.6°C 0mm 47% 0cm 52° 16°C 3.2mm 0.96kPa 20562m 5.3m/s 2.5m/s
12:00
23% 2.4°C 0mm 36% 0cm 57° 18°C 0.06mm 1.3kPa 24134m 7m/s 3.4m/s
13:00
39% 1.4°C 0mm 32% 0cm 60° 18°C 0.06mm 1.4kPa 24134m 7m/s 3.7m/s
14:00
55% 1°C 0mm 30% 0cm 58° 19°C 0.06mm 1.5kPa 24135m 7.8m/s 4.1m/s
15:00
38% 1.2°C 0mm 31% 0cm 52° 18°C 0.06mm 1.4kPa 24134m 7.8m/s 4.1m/s
16:00
22% 1.5°C 0mm 33% 0cm 45° 18°C 0.06mm 1.4kPa 24134m 8m/s 4.3m/s
17:00 ☾
5% 0.5°C 0mm 32% 0cm 36° 17°C 0.06mm 1.4kPa 24135m 8m/s 3.2m/s
18:00 ☾
3% 0.6°C 0mm 32% 0cm 27° 17°C 0mm 1.3kPa 24135m 6.9m/s 3.1m/s
19:00 ☾
2% 1.3°C 0mm 35% 0cm 18° 17°C 0mm 1.2kPa 24135m 6.3m/s 2.4m/s
20:00 ☾
0% 3.9°C 0mm 49% 0cm 9.5° 15°C 0mm 0.85kPa 24134m 1.9m/s 1.8m/s
21:00 ☾
0% 3.1°C 0mm 56% 0cm 1.9° 12°C 0mm 0.6kPa 24134m 1.5m/s 1.7m/s
22:00 ☾
0% 2.6°C 0mm 61% 0cm -5° 9.8°C 0mm 0.48kPa 24134m 1.5m/s 1.7m/s
23:00 ☾
0% 2.7°C 0mm 63% 0cm -10° 9.5°C 0mm 0.44kPa 24135m 1.6m/s 1.9m/s
Thu, Jul 9 Sunrise 04:44 Sunset 21:19
24:00 ☾
0% 3.1°C 0mm 64% 0cm -14° 9.5°C 0mm 0.42kPa 24135m 2.4m/s 2m/s
01:00 ☾
0% 3.7°C 0mm 72% 0cm -15° 8.5°C 0mm 0.31kPa 24134m 2m/s 1.8m/s
02:00 ☾
0% 4.2°C 0mm 76% 0cm -14° 8.2°C 0mm 0.26kPa 24135m 1.5m/s 1.3m/s
03:00 ☾
0% 4.4°C 0mm 77% 0cm -11° 8.1°C 0mm 0.24kPa 24134m 0.9m/s 0.99m/s
04:00 ☾
0% 5°C 0.31mm 78% 0cm -5.5° 8.6°C 0.13mm 0.25kPa 20719m 3m/s 1.9m/s
05:00
0% 5.6°C 0.05mm 87% 0cm 1.4° 7.7°C 0.31mm 0.14kPa 23623m 2.5m/s 1.5m/s
06:00
0% 5.7°C 0.01mm 85% 0cm 8.9° 8.1°C 0.06mm 0.16kPa 24134m 0.62m/s 0.36m/s
07:00
0% 5.8°C 0mm 76% 0cm 17° 9.7°C 0.06mm 0.28kPa 24135m 2.4m/s 1.3m/s
08:00
0% 4.8°C 0mm 61% 0cm 26° 12°C 0.13mm 0.56kPa 23730m 2.9m/s 1.4m/s
09:00
0% 3.6°C 0mm 51% 0cm 35° 13°C 0.31mm 0.75kPa 20299m 4.5m/s 2.4m/s
10:00
0% 3.1°C 0.01mm 49% 0cm 44° 14°C 0.44mm 0.8kPa 23912m 4.8m/s 2.5m/s
11:00
0% 3.8°C 0mm 52% 0cm 52° 13°C 0.5mm 0.74kPa 24135m 4.1m/s 2.4m/s
12:00
1% 4°C 0.01mm 52% 0cm 57° 14°C 0.13mm 0.76kPa 24134m 4.2m/s 2.6m/s
13:00
3% 4°C 0mm 48% 0cm 59° 15°C 0.31mm 0.87kPa 20416m 5.1m/s 3.2m/s
14:00
4% 3.5°C 0mm 43% 0cm 58° 16°C 0.44mm 1.1kPa 24135m 6.4m/s 3.3m/s
15:00
3% 2.9°C 0mm 40% 0cm 52° 17°C 0.5mm 1.1kPa 24135m 6m/s 3.3m/s
16:00
3% 2.6°C 0mm 38% 0cm 45° 17°C 0.5mm 1.2kPa 24135m 6.3m/s 3.2m/s
17:00 ☾
2% 3.2°C 0mm 40% 0cm 36° 17°C 0.5mm 1.1kPa 24135m 6.9m/s 3.7m/s
18:00 ☾
10% 3.9°C 0mm 46% 0cm 27° 16°C 0mm 0.96kPa 24135m 5.6m/s 3.5m/s
19:00 ☾
18% 3.3°C 0mm 44% 0cm 18° 16°C 0mm 0.99kPa 24135m 4.4m/s 2.5m/s
20:00 ☾
26% 5.4°C 0mm 56% 0cm 9.4° 14°C 0mm 0.7kPa 24134m 2.3m/s 1.9m/s
21:00 ☾
26% 5°C 0mm 68% 0cm 1.9° 11°C 0mm 0.41kPa 24135m 1.9m/s 2.1m/s
22:00 ☾
26% 4.7°C 0mm 75% 0cm -5.1° 8.8°C 0mm 0.28kPa 24134m 1.7m/s 1.8m/s
23:00 ☾
26% 4.6°C 0mm 80% 0cm -10° 7.8°C 0mm 0.21kPa 24135m 1.5m/s 1.6m/s
Fri, Jul 10 Sunrise 04:45 Sunset 21:18
24:00 ☾
24% 4.6°C 0mm 84% 0cm -14° 7°C 0mm 0.16kPa 24134m 1.5m/s 1.5m/s
01:00 ☾
22% 4.3°C 0mm 87% 0cm -15° 6.4°C 0mm 0.12kPa 24134m 1.2m/s 1.2m/s
02:00 ☾
20% 4.6°C 0mm 81% 0cm -14° 7.7°C 0mm 0.2kPa 24135m 1.3m/s 1.3m/s
03:00 ☾
15% 4.8°C 0mm 77% 0cm -11° 8.6°C 0mm 0.25kPa 24134m 1.1m/s 0.98m/s
04:00 ☾
11% 4.7°C 0mm 77% 0cm -5.6° 8.5°C 0mm 0.25kPa 24134m 0.4m/s 0.45m/s
05:00
6% 4.7°C 0mm 76% 0cm 1.3° 8.7°C 0mm 0.27kPa 24134m 0.92m/s 0.94m/s
06:00
5% 5°C 0mm 76% 0cm 8.8° 9°C 0mm 0.28kPa 24135m 1.1m/s 1.1m/s
07:00
4% 5°C 0mm 66% 0cm 17° 11°C 0mm 0.46kPa 24134m 1.5m/s 0.86m/s
08:00
3% 5.2°C 0mm 57% 0cm 26° 14°C 0.06mm 0.67kPa 22186m 2.3m/s 1.4m/s
09:00
5% 5.8°C 0mm 59% 0cm 35° 14°C 0.25mm 0.65kPa 19117m 2.8m/s 1.7m/s
10:00
7% 6.2°C 0mm 52% 0cm 44° 16°C 0.5mm 0.86kPa 21693m 3.5m/s 1.9m/s
11:00
9% 4.9°C 0mm 43% 0cm 51° 18°C 0.75mm 1.2kPa 20896m 5m/s 2.4m/s
12:00
12% 6.2°C 0.007mm 51% 0cm 57° 16°C 0.73mm 0.9kPa 21881m 3.8m/s 2m/s
13:00
14% 7°C 0.01mm 60% 0cm 59° 15°C 0.71mm 0.68kPa 22866m 2.6m/s 1.7m/s
14:00
17% 7.6°C 0.02mm 68% 0cm 57° 13°C 0.69mm 0.49kPa 23851m 1.4m/s 1.3m/s
15:00
16% 7.7°C 0.2mm 76% 0cm 52° 12°C 1mm 0.33kPa 20270m 1.4m/s 1.3m/s
16:00
14% 7.6°C 0.37mm 84% 0cm 44° 10°C 1.3mm 0.2kPa 16689m 1.4m/s 1.3m/s
17:00 ☾
13% 7.4°C 0.55mm 92% 0cm 36° 8.6°C 1.6mm 0.09kPa 13108m 1.3m/s 1.3m/s
18:00 ☾
22% 6.9°C 0.38mm 92% 0cm 27° 8.1°C 1.3mm 0.09kPa 16784m 1.3m/s 1.2m/s
19:00 ☾
32% 6.4°C 0.2mm 92% 0cm 18° 7.7°C 0.92mm 0.09kPa 20459m 1.2m/s 1.1m/s
20:00 ☾
41% 6°C 0.03mm 91% 0cm 9.4° 7.3°C 0.56mm 0.09kPa 24135m 1.1m/s 1m/s
21:00 ☾
40% 5.5°C 0.02mm 92% 0cm 1.8° 6.7°C 0.58mm 0.08kPa 24135m 1.2m/s 1.1m/s
22:00 ☾
40% 5.1°C 0.01mm 92% 0cm -5.2° 6.2°C 0.6mm 0.07kPa 24135m 1.3m/s 1.1m/s
23:00 ☾
39% 4.7°C 0mm 93% 0cm -10° 5.7°C 0.63mm 0.06kPa 24135m 1.3m/s 1.1m/s
Sat, Jul 11 Sunrise 04:46 Sunset 21:17
24:00 ☾
33% 5.4°C 0.02mm 89% 0cm -14° 7.1°C 0.42mm 0.11kPa 24135m 1.6m/s 1.2m/s
01:00 ☾
28% 6.1°C 0.03mm 85% 0cm -15° 8.5°C 0.21mm 0.17kPa 24135m 1.9m/s 1.3m/s
02:00 ☾
22% 6.7°C 0.05mm 81% 0cm -14° 9.8°C 0mm 0.23kPa 24135m 2.1m/s 1.4m/s
03:00 ☾
21% 6.2°C 0.04mm 68% 0cm -11° 12°C 0.13mm 0.46kPa 24135m 2.8m/s 1.3m/s
04:00 ☾
19% 5.1°C 0.03mm 54% 0cm -5.7° 14°C 0.25mm 0.74kPa 24135m 3.5m/s 1.3m/s
05:00
18% 3.1°C 0.02mm 41% 0cm 1.2° 16°C 0.38mm 1.1kPa 24135m 4.1m/s 1.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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