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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 Spread1.4°C
Visibility24135 (Clear)
Relative Humidity90%
Wind Speed0.6m/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 75 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/Vancouver
Fog Probability
≥ 75.0%
Sun, May 17
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%
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22:000%
23:000%
Wed, May 20
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%
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18:000%
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21:000%
22:000%
23:000%
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
Mon, May 18 Sunrise 04:58 Sunset 20:40
01:00 ☾
58% -2.1°C 0mm 90% 0cm -19° -0.73°C 0mm 0.06kPa 24135m 0.71m/s 0.62m/s
02:00 ☾
44% -2.4°C 0mm 91% 0cm -18° -1.1°C 0mm 0.05kPa 24135m 0.81m/s 0.84m/s
03:00 ☾
40% -2.6°C 0mm 91% 0cm -14° -1.4°C 0mm 0.05kPa 24134m 0.8m/s 0.81m/s
04:00 ☾
36% -2.7°C 0mm 91% 0cm -7.9° -1.5°C 0mm 0.05kPa 24135m 0.71m/s 0.61m/s
05:00
32% -2.8°C 0mm 91% 0cm -0.11° -1.6°C 0mm 0.05kPa 24134m 0.9m/s 0.83m/s
06:00
25% -2.3°C 0mm 87% 0cm 7.9° -0.38°C 0mm 0.08kPa 24134m 1.1m/s 0.95m/s
07:00
17% -1.3°C 0mm 77% 0cm 17° 2.4°C 0mm 0.17kPa 24134m 0.9m/s 0.62m/s
08:00
10% -0.5°C 0mm 68% 0cm 26° 5°C 0mm 0.28kPa 24134m 0.9m/s 0.64m/s
09:00
10% 0.1°C 0mm 58% 0cm 36° 7.7°C 0mm 0.44kPa 24134m 0.71m/s 0.38m/s
10:00
9% 0.3°C 0mm 49% 0cm 44° 10°C 0.06mm 0.64kPa 24134m 0.9m/s 0.36m/s
11:00
9% 0.2°C 0mm 44% 0cm 52° 12°C 0.19mm 0.78kPa 24135m 1.5m/s 0.76m/s
12:00
7% -0.2°C 0mm 41% 0cm 57° 13°C 0.13mm 0.86kPa 23520m 2.1m/s 1.1m/s
13:00
6% -1°C 0mm 38% 0cm 59° 13°C 0.25mm 0.91kPa 24135m 2.7m/s 1.5m/s
14:00
4% -1.6°C 0mm 35% 0cm 56° 13°C 0.25mm 0.99kPa 24135m 3.1m/s 1.4m/s
15:00
3% -1.8°C 0mm 34% 0cm 50° 14°C 0.25mm 1kPa 24134m 2.9m/s 1.2m/s
16:00
1% -1.5°C 0mm 36% 0cm 41° 13°C 0.25mm 0.97kPa 24134m 2.5m/s 1.2m/s
17:00 ☾
0% -1.3°C 0mm 39% 0cm 32° 12°C 0.31mm 0.88kPa 24134m 2.4m/s 1m/s
18:00 ☾
0% -1°C 0mm 41% 0cm 23° 12°C 0mm 0.81kPa 24134m 1.8m/s 0.45m/s
19:00 ☾
0% 0.7°C 0mm 49% 0cm 14° 11°C 0.06mm 0.66kPa 22714m 2m/s 1.4m/s
20:00 ☾
0% 1.2°C 0mm 59% 0cm 4.9° 8.7°C 0.13mm 0.46kPa 23693m 1.4m/s 1.6m/s
21:00 ☾
0% 0.8°C 0mm 69% 0cm -3.2° 6.1°C 0.13mm 0.29kPa 24134m 1.2m/s 1.4m/s
22:00 ☾
0% 0.8°C 0mm 72% 0cm -10° 5.4°C 0.13mm 0.25kPa 24134m 0.91m/s 0.9m/s
23:00 ☾
0% 0.5°C 0mm 76% 0cm -15° 4.4°C 0.13mm 0.2kPa 24134m 0.71m/s 0.58m/s
Tue, May 19 Sunrise 04:57 Sunset 20:41
24:00 ☾
1% 0.3°C 0mm 79% 0cm -18° 3.6°C 0mm 0.16kPa 24134m 0.51m/s 0.33m/s
01:00 ☾
1% 0.4°C 0mm 79% 0cm -19° 3.8°C 0mm 0.17kPa 24135m 0.31m/s 0.02m/s
02:00 ☾
2% 0.7°C 0mm 77% 0cm -17° 4.3°C 0mm 0.19kPa 24135m 0.21m/s 0.11m/s
03:00 ☾
1% 0.7°C 0mm 79% 0cm -14° 4.1°C 0mm 0.17kPa 24135m 0.31m/s 0.13m/s
04:00 ☾
1% 1.1°C 0.05mm 82% 0cm -7.7° 3.8°C 0mm 0.14kPa 24134m 0.8m/s 0.92m/s
05:00
0% 1.6°C 0.02mm 82% 0cm 0.09° 4.5°C 0.06mm 0.16kPa 24134m 0.21m/s 0.17m/s
06:00
0% 1.9°C 0.35mm 83% 0cm 8° 4.5°C 0.13mm 0.14kPa 24134m 0.81m/s 0.84m/s
07:00
0% 3°C 0.88mm 85% 0cm 17° 5.4°C 0.75mm 0.14kPa 14747m 1.8m/s 1.1m/s
08:00
0% 3.5°C 1.4mm 90% 0cm 26° 5.1°C 1.9mm 0.09kPa 11933m 1.4m/s 1.2m/s
09:00
0% 3.4°C 0.54mm 88% 0cm 36° 5.3°C 2.8mm 0.11kPa 22787m 1.8m/s 1.4m/s
10:00
0% 3.7°C 0mm 84% 0cm 45° 6.2°C 2.9mm 0.15kPa 22786m 1.5m/s 1.3m/s
11:00
0% 4°C 0.07mm 75% 0cm 52° 8.2°C 3mm 0.27kPa 19936m 1.7m/s 1.1m/s
12:00
0% 4°C 0.2mm 74% 0cm 57° 8.3°C 0.38mm 0.28kPa 19657m 1.9m/s 1.7m/s
13:00
0% 4°C 0.15mm 70% 0cm 59° 9.3°C 0.81mm 0.36kPa 13472m 2.4m/s 2.2m/s
14:00
0% 4.3°C 0.31mm 75% 0cm 56° 8.5°C 1.4mm 0.28kPa 14299m 2.7m/s 2.8m/s
15:00
0% 4.7°C 0.11mm 82% 0cm 50° 7.6°C 1.9mm 0.18kPa 19651m 2.9m/s 2.9m/s
16:00
0% 4.5°C 0mm 85% 0cm 42° 6.9°C 2.2mm 0.15kPa 21768m 2.2m/s 2m/s
17:00 ☾
0% 4.4°C 0mm 74% 0cm 32° 8.9°C 2.4mm 0.3kPa 21559m 2m/s 1.8m/s
18:00 ☾
6% 4°C 0mm 69% 0cm 23° 9.3°C 0.25mm 0.36kPa 21348m 1.9m/s 1.5m/s
19:00 ☾
12% 3.8°C 0mm 70% 0cm 14° 9.1°C 0.31mm 0.35kPa 24135m 1.8m/s 1.2m/s
20:00 ☾
18% 4.1°C 0mm 82% 0cm 5.1° 7°C 0.38mm 0.18kPa 24075m 1.2m/s 1.2m/s
21:00 ☾
17% 3.3°C 0mm 91% 0cm -3° 4.7°C 0.44mm 0.08kPa 24135m 0.7m/s 0.65m/s
22:00 ☾
16% 3°C 0mm 93% 0cm -9.9° 4.1°C 0.5mm 0.06kPa 24135m 0.8m/s 0.81m/s
23:00 ☾
15% 2.4°C 0mm 94% 0cm -15° 3.3°C 0.5mm 0.05kPa 24134m 1.1m/s 1.2m/s
Wed, May 20 Sunrise 04:56 Sunset 20:43
24:00 ☾
20% 1.9°C 0mm 94% 0cm -18° 2.7°C 0mm 0.04kPa 24134m 0.92m/s 0.85m/s
01:00 ☾
24% 1.8°C 0mm 94% 0cm -19° 2.6°C 0mm 0.05kPa 24134m 0.9m/s 0.91m/s
02:00 ☾
29% 1.4°C 0mm 93% 0cm -17° 2.3°C 0mm 0.05kPa 24135m 0.92m/s 0.98m/s
03:00 ☾
28% 1.1°C 0mm 93% 0cm -13° 2.2°C 0mm 0.05kPa 24135m 0.9m/s 0.82m/s
04:00 ☾
26% 0.8°C 0mm 93% 0cm -7.5° 1.8°C 0mm 0.05kPa 24135m 0.8m/s 0.79m/s
05:00
25% 0.4°C 0mm 94% 0cm 0.23° 1.2°C 0mm 0.04kPa 24134m 0.92m/s 0.84m/s
06:00
25% 0.9°C 0mm 91% 0cm 8.2° 2.1°C 0mm 0.06kPa 24135m 0.7m/s 0.78m/s
07:00
25% 2.2°C 0mm 84% 0cm 17° 4.7°C 0mm 0.14kPa 24135m 1.6m/s 1.1m/s
08:00
25% 3.1°C 0mm 76% 0cm 27° 7°C 0.13mm 0.24kPa 22168m 2.3m/s 1.5m/s
09:00
24% 3.3°C 0mm 67% 0cm 36° 9°C 0.44mm 0.38kPa 13278m 2.7m/s 1.9m/s
10:00
24% 0.7°C 0mm 51% 0cm 45° 10°C 0.63mm 0.62kPa 23963m 4.2m/s 2.1m/s
11:00
23% -1.5°C 0mm 39% 0cm 52° 12°C 0.69mm 0.85kPa 24134m 6.1m/s 2.4m/s
12:00
22% -0.3°C 0mm 48% 0cm 58° 10°C 0.46mm 0.64kPa 24134m 4.7m/s 2.3m/s
13:00
22% 0.3°C 0mm 57% 0cm 59° 8.4°C 0.23mm 0.47kPa 24135m 3.3m/s 2.1m/s
14:00
21% 0.6°C 0mm 66% 0cm 56° 6.6°C 0mm 0.33kPa 24135m 1.8m/s 1.9m/s
15:00
16% -0.3°C 0mm 67% 0cm 50° 5.4°C 0mm 0.3kPa 24135m 1.8m/s 1.9m/s
16:00
12% -1.1°C 0mm 68% 0cm 42° 4.2°C 0mm 0.26kPa 24135m 1.7m/s 1.9m/s
17:00 ☾
7% -2°C 0mm 69% 0cm 33° 3°C 0mm 0.23kPa 24135m 1.6m/s 1.9m/s
18:00 ☾
15% -2.3°C 0mm 70% 0cm 23° 2.6°C 0mm 0.22kPa 24135m 1.6m/s 1.8m/s
19:00 ☾
22% -2.5°C 0mm 71% 0cm 14° 2.2°C 0mm 0.21kPa 24135m 1.5m/s 1.8m/s
20:00 ☾
30% -2.8°C 0mm 72% 0cm 5.3° 1.8°C 0mm 0.2kPa 24135m 1.4m/s 1.7m/s
21:00 ☾
35% -2.8°C 0mm 73% 0cm -2.8° 1.5°C 0mm 0.19kPa 24135m 1.3m/s 1.5m/s
22:00 ☾
40% -2.9°C 0mm 74% 0cm -9.7° 1.2°C 0mm 0.17kPa 24135m 1.2m/s 1.4m/s
23:00 ☾
45% -3°C 0mm 75% 0cm -15° 0.89°C 0mm 0.16kPa 24135m 1m/s 1.2m/s
Thu, May 21 Sunrise 04:54 Sunset 20:44
24:00 ☾
51% -2.1°C 0mm 68% 0cm -18° 3.1°C 0mm 0.24kPa 24135m 0.89m/s 1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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