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Rule Fog Hunter

Revelstoke - Fog Hunter - Canadian Rockies

Revelstoke, 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 Spread0.9°C
Visibility24135 (Clear)
Relative Humidity93%
Wind Speed1.1m/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 79 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Vancouver
Fog Probability
≥ 75.0%
Sat, May 16
22:000%
23:000%
Sun, May 17
24:0055%
01:0055%
02:0055%
03:0055%
04:0071%
05:0071%
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 18
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 19
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%
17:0044%
18:0048%
19:0055%
20:0055%
21:000%
22:000%
23:000%
Wed, May 20
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
Sun, May 17 Sunrise 05:00 Sunset 20:39
06:00
1% -1.3°C 0mm 93% 0cm 7.7° -0.39°C 0mm 0.04kPa 24135m 2m/s 1.1m/s
07:00
2% -0.6°C 0mm 84% 0cm 17° 1.8°C 0mm 0.11kPa 24135m 2m/s 1.3m/s
08:00
2% 0°C 0mm 75% 0cm 26° 4°C 0mm 0.2kPa 24134m 2m/s 1.4m/s
09:00
1% 0°C 0mm 66% 0.02cm 35° 5.8°C 0mm 0.31kPa 13853m 2m/s 1.5m/s
10:00
1% -0.3°C 0mm 62% 0cm 44° 6.4°C 0.06mm 0.36kPa 7539m 1.9m/s 1.5m/s
11:00
0% -0.4°C 0mm 62% 0cm 52° 6.4°C 0.13mm 0.37kPa 6889m 1.9m/s 1.4m/s
12:00
0% -0.4°C 0mm 60% 0cm 57° 7°C 0.06mm 0.4kPa 9272m 1.8m/s 1.3m/s
13:00
0% -0.3°C 0mm 57% 0cm 58° 7.6°C 0.06mm 0.44kPa 9468m 1.8m/s 1.3m/s
14:00
0% -0.4°C 0mm 56% 0cm 56° 7.8°C 0.13mm 0.46kPa 11328m 1.8m/s 1.2m/s
15:00
0% -0.3°C 0mm 57% 0cm 49° 7.7°C 0.19mm 0.46kPa 9946m 1.7m/s 1.1m/s
16:00
0% -0.3°C 0mm 54% 0cm 41° 8.3°C 0.25mm 0.5kPa 10645m 1.8m/s 1.2m/s
17:00 ☾
0% -0.5°C 0mm 53% 0cm 32° 8.5°C 0.31mm 0.52kPa 24135m 1.9m/s 1.1m/s
18:00 ☾
3% -0.8°C 0mm 51% 0cm 23° 8.7°C 0.06mm 0.55kPa 24134m 1.8m/s 0.85m/s
19:00 ☾
5% -0.5°C 0mm 56% 0cm 13° 7.9°C 0.06mm 0.47kPa 24135m 1.5m/s 0.81m/s
20:00 ☾
8% 0°C 0mm 69% 0cm 4.7° 5.3°C 0.13mm 0.28kPa 24135m 0.81m/s 0.72m/s
21:00 ☾
9% -0.6°C 0mm 79% 0cm -3.4° 2.7°C 0.13mm 0.15kPa 24135m 0.91m/s 0.76m/s
22:00 ☾
11% -0.6°C 0mm 85% 0cm -10° 1.6°C 0.13mm 0.1kPa 24134m 0.9m/s 0.69m/s
23:00 ☾
12% -0.9°C 0mm 89% 0cm -15° 0.77°C 0.13mm 0.07kPa 24135m 0.8m/s 0.73m/s
Mon, May 18 Sunrise 04:58 Sunset 20:40
24:00 ☾
20% -1.1°C 0mm 90% 0cm -19° 0.31°C 0mm 0.06kPa 24134m 0.7m/s 0.66m/s
01:00 ☾
29% -1.3°C 0mm 92% 0cm -19° -0.18°C 0mm 0.05kPa 24135m 0.7m/s 0.68m/s
02:00 ☾
37% -1.6°C 0mm 92% 0cm -18° -0.56°C 0mm 0.04kPa 24135m 0.82m/s 0.66m/s
03:00 ☾
36% -1.8°C 0mm 93% 0cm -14° -0.75°C 0mm 0.04kPa 24134m 0.52m/s 0.4m/s
04:00 ☾
36% -2°C 0mm 93% 0cm -7.9° -1°C 0mm 0.04kPa 24134m 0.7m/s 0.66m/s
05:00
35% -2°C 0mm 94% 0cm -0.11° -1.1°C 0mm 0.04kPa 24134m 0.8m/s 0.85m/s
06:00
39% -1.6°C 0mm 86% 0cm 7.9° 0.35°C 0mm 0.08kPa 24135m 0.7m/s 0.68m/s
07:00
43% -1.1°C 0mm 74% 0cm 17° 3.1°C 0mm 0.2kPa 24134m 0.8m/s 0.51m/s
08:00
47% -0.5°C 0mm 63% 0cm 26° 5.9°C 0mm 0.34kPa 24135m 0.84m/s 0.58m/s
09:00
44% -0.4°C 0mm 56% 0cm 36° 7.8°C 0mm 0.46kPa 24134m 0.91m/s 0.59m/s
10:00
40% -0.1°C 0mm 49% 0cm 44° 10°C 0mm 0.63kPa 24135m 1m/s 0.44m/s
11:00
37% 0.1°C 0mm 43% 0cm 52° 12°C 0.06mm 0.81kPa 23978m 1.2m/s 0.67m/s
12:00
26% -0.3°C 0mm 39% 0cm 57° 13°C 0.13mm 0.94kPa 23559m 1.9m/s 1m/s
13:00
15% -1.3°C 0mm 36% 0cm 59° 14°C 0.19mm 1kPa 24135m 2.5m/s 1.5m/s
14:00
4% -1.6°C 0mm 34% 0cm 56° 14°C 0.19mm 1.1kPa 24135m 2.8m/s 1.6m/s
15:00
3% -2°C 0mm 36% 0cm 50° 12°C 0.19mm 0.92kPa 24135m 2.6m/s 1.3m/s
16:00
1% -1.2°C 0mm 36% 0cm 41° 13°C 0.19mm 0.98kPa 24135m 2.3m/s 0.97m/s
17:00 ☾
0% -1.1°C 0mm 38% 0cm 32° 13°C 0.25mm 0.9kPa 24134m 2.2m/s 1.1m/s
18:00 ☾
0% -1.1°C 0mm 40% 0cm 23° 12°C 0mm 0.83kPa 24135m 2.4m/s 1.1m/s
19:00 ☾
0% 0.8°C 0mm 49% 0cm 14° 11°C 0mm 0.68kPa 24135m 1m/s 0.81m/s
20:00 ☾
0% 0.9°C 0mm 59% 0cm 4.9° 8.6°C 0mm 0.46kPa 24135m 0.6m/s 0.53m/s
21:00 ☾
0% 0.7°C 0mm 66% 0cm -3.2° 6.8°C 0mm 0.34kPa 24134m 0.5m/s 0.44m/s
22:00 ☾
0% 0.8°C 0mm 71% 0cm -10° 5.6°C 0mm 0.26kPa 24135m 0.71m/s 0.59m/s
23:00 ☾
0% 0.7°C 0mm 76% 0cm -15° 4.6°C 0mm 0.2kPa 24135m 0.8m/s 0.59m/s
Tue, May 19 Sunrise 04:57 Sunset 20:41
24:00 ☾
1% 0.8°C 0mm 77% 0cm -18° 4.4°C 0mm 0.19kPa 24134m 0.81m/s 0.68m/s
01:00 ☾
3% 0.8°C 0mm 79% 0cm -19° 4.2°C 0mm 0.18kPa 24134m 0.8m/s 0.65m/s
02:00 ☾
4% 0.8°C 0mm 81% 0cm -17° 3.8°C 0mm 0.15kPa 24134m 0.61m/s 0.68m/s
03:00 ☾
3% 0.8°C 0mm 82% 0cm -14° 3.6°C 0mm 0.14kPa 24134m 0.71m/s 0.75m/s
04:00 ☾
1% 0.7°C 0mm 84% 0cm -7.7° 3.3°C 0mm 0.13kPa 24134m 0.81m/s 0.83m/s
05:00
0% 0.7°C 0mm 84% 0cm 0.09° 3.1°C 0mm 0.12kPa 24134m 1m/s 1m/s
06:00
0% 0.7°C 0mm 80% 0cm 8° 3.8°C 0mm 0.16kPa 24134m 1.3m/s 0.98m/s
07:00
1% 0.6°C 0mm 70% 0cm 17° 5.6°C 0mm 0.27kPa 24134m 1.5m/s 0.99m/s
08:00
1% 0°C 0mm 59% 0cm 26° 7.4°C 0mm 0.42kPa 24135m 1.8m/s 1.2m/s
09:00
1% -0.8°C 0mm 52% 0cm 36° 8.4°C 0mm 0.52kPa 24135m 2.1m/s 1.5m/s
10:00
1% -1.1°C 0mm 48% 0cm 45° 9.3°C 0mm 0.61kPa 24135m 2.6m/s 1.9m/s
11:00
1% -0.3°C 0.04mm 52% 0cm 52° 9.1°C 0.06mm 0.56kPa 8728m 2.6m/s 2.6m/s
12:00
1% 1.2°C 0.03mm 65% 0cm 57° 7.3°C 0.08mm 0.36kPa 13864m 2.3m/s 2.2m/s
13:00
0% 2.1°C 0.02mm 79% 0cm 59° 5.6°C 0.1mm 0.19kPa 18999m 2m/s 1.8m/s
14:00
0% 2.6°C 0.01mm 92% 0cm 56° 3.8°C 0.13mm 0.06kPa 24135m 1.7m/s 1.3m/s
15:00
0% 2.1°C 0.007mm 93% 0cm 50° 3.1°C 0.13mm 0.05kPa 24135m 1.6m/s 1.3m/s
16:00
0% 1.5°C 0.003mm 94% 0cm 42° 2.4°C 0.13mm 0.05kPa 24135m 1.5m/s 1.3m/s
17:00 ☾
0% 1°C 0mm 95% 0cm 32° 1.8°C 0.13mm 0.04kPa 24135m 1.4m/s 1.3m/s
18:00 ☾
3% 0.5°C 0mm 95% 0cm 23° 1.3°C 0.08mm 0.04kPa 24135m 1.4m/s 1.3m/s
19:00 ☾
6% 0°C 0mm 95% 0cm 14° 0.77°C 0.04mm 0.03kPa 24135m 1.3m/s 1.3m/s
20:00 ☾
9% -0.5°C 0mm 95% 0cm 5.1° 0.27°C 0mm 0.03kPa 24135m 1.2m/s 1.3m/s
21:00 ☾
10% -0.7°C 0mm 94% 0cm -3° 0.1°C 0mm 0.03kPa 24135m 1.2m/s 1.3m/s
22:00 ☾
12% -0.9°C 0mm 94% 0cm -9.9° -0.06°C 0mm 0.04kPa 24135m 1.2m/s 1.2m/s
23:00 ☾
13% -1.1°C 0mm 94% 0cm -15° -0.22°C 0mm 0.04kPa 24135m 1.1m/s 1.2m/s
Wed, May 20 Sunrise 04:56 Sunset 20:43
24:00 ☾
20% -0.1°C 0mm 88% 0cm -18° 1.7°C 0mm 0.09kPa 24135m 1m/s 1.1m/s
01:00 ☾
28% 0.7°C 0mm 81% 0cm -19° 3.6°C 0mm 0.15kPa 24135m 0.91m/s 1m/s
02:00 ☾
35% 1.4°C 0mm 75% 0cm -17° 5.5°C 0mm 0.23kPa 24135m 0.8m/s 0.95m/s
03:00 ☾
32% 1.3°C 0.007mm 67% 0cm -13° 7°C 0mm 0.33kPa 24135m 0.91m/s 1.1m/s
04:00 ☾
29% 1°C 0.01mm 59% 0cm -7.5° 8.5°C 0mm 0.45kPa 24135m 1m/s 1.2m/s
05:00
26% 0.4°C 0.02mm 51% 0cm 0.23° 10°C 0mm 0.6kPa 24135m 1.1m/s 1.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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