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Rule Fog Hunter

Banff - Fog Hunter - Canadian Rockies

Banff, 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 Spread1.8°C
Visibility24135 (Clear)
Relative Humidity87%
Wind Speed1.0m/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%
03:0055%
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 05:40 Sunset 21:38
07:00
5% 0.3°C 0mm 87% 0cm 10° 2.1°C 0mm 0.09kPa 24135m 1m/s 1m/s
08:00
6% 1.1°C 0mm 81% 0cm 19° 4°C 0mm 0.15kPa 24135m 1.1m/s 0.99m/s
09:00
8% 1.7°C 0mm 72% 0cm 29° 6.3°C 0mm 0.27kPa 24134m 2m/s 1.6m/s
10:00
6% 1°C 0mm 61% 0cm 38° 8.1°C 0mm 0.43kPa 24134m 2.9m/s 2m/s
11:00
4% -0.6°C 0mm 48% 0cm 47° 9.8°C 0mm 0.63kPa 24134m 5.6m/s 2.4m/s
12:00
2% -1.9°C 0mm 40% 0cm 54° 11°C 0mm 0.78kPa 24134m 7m/s 3m/s
13:00
1% -2.3°C 0mm 37% 0cm 59° 12°C 0mm 0.88kPa 24135m 7.2m/s 3.6m/s
14:00
1% -2.1°C 0mm 36% 0cm 59° 13°C 0mm 0.94kPa 24134m 8.1m/s 5.3m/s
15:00
0% -1.6°C 0mm 38% 0cm 56° 12°C 0mm 0.9kPa 24135m 8.8m/s 5.4m/s
16:00
0% -1.3°C 0mm 38% 0cm 49° 12°C 0mm 0.89kPa 24134m 7.9m/s 3.7m/s
17:00
0% -1.3°C 0mm 39% 0cm 41° 12°C 0mm 0.88kPa 24135m 8.7m/s 3.2m/s
18:00 ☾
0% -1.8°C 0mm 38% 0cm 32° 12°C 0mm 0.89kPa 24135m 8.9m/s 4.3m/s
19:00 ☾
0% -1.2°C 0mm 40% 0cm 22° 12°C 0mm 0.83kPa 24135m 8.5m/s 3.6m/s
20:00 ☾
0% 0°C 0mm 47% 0cm 13° 11°C 0mm 0.7kPa 24135m 3.7m/s 2.2m/s
21:00 ☾
0% -0.3°C 0mm 54% 0cm 4.5° 8.4°C 0mm 0.51kPa 24135m 1.3m/s 1.4m/s
22:00 ☾
0% -1.3°C 0mm 56% 0cm -3.3° 6.8°C 0mm 0.43kPa 24134m 1.3m/s 1.4m/s
23:00 ☾
0% -1.4°C 0mm 61% 0cm -9.8° 5.6°C 0mm 0.36kPa 24134m 1.4m/s 1.5m/s
Mon, May 25 Sunrise 05:39 Sunset 21:40
24:00 ☾
0% -1.2°C 0mm 64% 0cm -15° 5°C 0mm 0.31kPa 24134m 1.4m/s 1.6m/s
01:00 ☾
0% -1.1°C 0mm 68% 0cm -17° 4.2°C 0mm 0.26kPa 24135m 1.6m/s 1.9m/s
02:00 ☾
0% -1°C 0mm 72% 0cm -18° 3.5°C 0mm 0.22kPa 24134m 1.6m/s 1.9m/s
03:00 ☾
0% -0.9°C 0mm 75% 0cm -16° 3.1°C 0mm 0.19kPa 24135m 1.6m/s 1.8m/s
04:00 ☾
0% -0.8°C 0mm 76% 0cm -11° 2.9°C 0mm 0.18kPa 24135m 1.6m/s 1.9m/s
05:00 ☾
0% -0.6°C 0mm 78% 0cm -5.4° 2.9°C 0mm 0.17kPa 24134m 1.5m/s 1.8m/s
06:00
0% -0.1°C 0mm 79% 0cm 2.2° 3.2°C 0mm 0.16kPa 24135m 1.4m/s 1.5m/s
07:00
2% 0.8°C 0mm 76% 0cm 10° 4.6°C 0mm 0.2kPa 24134m 1.6m/s 1.5m/s
08:00
3% 1.7°C 0mm 71% 0cm 19° 6.6°C 0mm 0.28kPa 24134m 2.1m/s 1.8m/s
09:00
5% 2.5°C 0mm 66% 0cm 29° 8.5°C 0mm 0.38kPa 24134m 2.3m/s 1.9m/s
10:00
8% 2.7°C 0mm 59% 0cm 38° 10°C 0mm 0.52kPa 24134m 3.4m/s 2m/s
11:00
10% 1.7°C 0mm 48% 0cm 47° 12°C 0mm 0.74kPa 24135m 7.9m/s 2.2m/s
12:00
13% -0.1°C 0mm 38% 0cm 54° 14°C 0mm 0.98kPa 24134m 9m/s 3.1m/s
13:00
20% -0.7°C 0mm 35% 0cm 59° 15°C 0mm 1.1kPa 24135m 9.5m/s 4.1m/s
14:00
27% -0.7°C 0mm 33% 0cm 60° 15°C 0mm 1.2kPa 24134m 11m/s 5.9m/s
15:00
34% -1.3°C 0mm 31% 0cm 56° 16°C 0mm 1.2kPa 24135m 11m/s 6m/s
16:00
29% -2.7°C 0mm 28% 0cm 49° 16°C 0mm 1.3kPa 24134m 9.6m/s 5.1m/s
17:00
23% -3.4°C 0mm 26% 0cm 41° 16°C 0mm 1.4kPa 24134m 8m/s 4.7m/s
18:00 ☾
18% -3.7°C 0mm 26% 0cm 32° 16°C 0mm 1.3kPa 24135m 6.4m/s 4.2m/s
19:00 ☾
15% -2.4°C 0mm 30% 0cm 22° 15°C 0mm 1.2kPa 24134m 4.8m/s 3.3m/s
20:00 ☾
11% -1.1°C 0mm 36% 0cm 13° 14°C 0mm 0.99kPa 24135m 2.8m/s 2.2m/s
21:00 ☾
8% -1.4°C 0mm 42% 0cm 4.7° 11°C 0mm 0.76kPa 24134m 1.7m/s 1.7m/s
22:00 ☾
6% -2°C 0mm 46% 0cm -3.1° 8.9°C 0mm 0.61kPa 24134m 1.7m/s 1.7m/s
23:00 ☾
4% -1.7°C 0mm 50% 0cm -9.7° 8.2°C 0mm 0.55kPa 24134m 2m/s 2m/s
Tue, May 26 Sunrise 05:38 Sunset 21:41
24:00 ☾
2% -1.3°C 0mm 49% 0cm -14° 8.8°C 0mm 0.58kPa 24135m 1.1m/s 1.2m/s
01:00 ☾
3% -0.5°C 0.01mm 56% 0cm -17° 7.9°C 0mm 0.47kPa 24134m 2m/s 2.3m/s
02:00 ☾
4% -0.4°C 0mm 61% 0cm -18° 6.6°C 0mm 0.38kPa 24135m 1.8m/s 2m/s
03:00 ☾
5% 1.6°C 0mm 70% 0cm -16° 6.6°C 0.13mm 0.29kPa 24134m 1.2m/s 1.2m/s
04:00 ☾
4% 3.9°C 0.67mm 90% 0cm -11° 5.4°C 2.6mm 0.09kPa 20104m 0.82m/s 0.68m/s
05:00 ☾
2% 3.5°C 0.72mm 92% 0cm -5.3° 4.7°C 2.8mm 0.07kPa 17895m 0.5m/s 0.31m/s
06:00
1% 3.7°C 0mm 90% 0cm 2.3° 5.1°C 3.1mm 0.08kPa 24134m 1.9m/s 2m/s
07:00
1% 3.7°C 0mm 89% 0cm 11° 5.3°C 0mm 0.1kPa 24134m 2.5m/s 2.1m/s
08:00
0% 4°C 0mm 80% 0cm 20° 7.1°C 0mm 0.2kPa 24135m 1.8m/s 1.7m/s
09:00
0% 4.8°C 0mm 75% 0cm 29° 9°C 0mm 0.29kPa 24135m 1.5m/s 1.5m/s
10:00
0% 5.4°C 0mm 67% 0cm 38° 11°C 0mm 0.44kPa 24134m 1.4m/s 1.5m/s
11:00
0% 5.5°C 0mm 60% 0cm 47° 13°C 0mm 0.61kPa 24135m 1.4m/s 1.6m/s
12:00
0% 5.6°C 0mm 52% 0cm 54° 15°C 0mm 0.82kPa 24134m 1.8m/s 1.7m/s
13:00
1% 6.5°C 0mm 63% 0cm 59° 14°C 0.98mm 0.58kPa 18475m 1.7m/s 1.8m/s
14:00
3% 7.1°C 0mm 73% 0cm 60° 12°C 2mm 0.38kPa 12817m 1.7m/s 1.8m/s
15:00
4% 7.4°C 0mm 83% 0cm 56° 10°C 2.9mm 0.21kPa 7158m 1.6m/s 1.9m/s
16:00
3% 7.2°C 0.007mm 86% 0cm 49° 9.3°C 3mm 0.16kPa 12817m 1.9m/s 1.8m/s
17:00
1% 6.9°C 0.01mm 90% 0cm 41° 8.5°C 3.1mm 0.11kPa 18476m 2.2m/s 1.8m/s
18:00 ☾
0% 6.7°C 0.02mm 94% 0cm 32° 7.7°C 3.3mm 0.07kPa 24135m 2.5m/s 1.7m/s
19:00 ☾
0% 6.9°C 0.21mm 94% 0cm 23° 7.7°C 2.8mm 0.06kPa 19963m 2.4m/s 1.7m/s
20:00 ☾
0% 7.1°C 0.39mm 95% 0cm 13° 7.8°C 2.3mm 0.05kPa 15791m 2.3m/s 1.7m/s
21:00 ☾
0% 7.3°C 0.58mm 96% 0cm 4.8° 7.9°C 1.8mm 0.04kPa 11619m 2.1m/s 1.7m/s
22:00 ☾
0% 7.4°C 0.41mm 97% 0cm -3° 7.9°C 2.9mm 0.04kPa 12374m 2.3m/s 1.8m/s
23:00 ☾
0% 7.5°C 0.24mm 97% 0cm -9.5° 8°C 4.1mm 0.03kPa 13128m 2.4m/s 1.8m/s
Wed, May 27 Sunrise 05:37 Sunset 21:42
24:00 ☾
0% 7.7°C 0.07mm 98% 0cm -14° 8°C 5.2mm 0.03kPa 13883m 2.5m/s 1.8m/s
01:00 ☾
0% 7.8°C 0.05mm 97% 0cm -17° 8.2°C 3.5mm 0.03kPa 17300m 2.1m/s 1.6m/s
02:00 ☾
1% 7.9°C 0.02mm 97% 0cm -17° 8.4°C 1.8mm 0.04kPa 20718m 1.6m/s 1.3m/s
03:00 ☾
1% 7.9°C 0mm 96% 0cm -15° 8.5°C 0.06mm 0.04kPa 24135m 1.1m/s 1m/s
04:00 ☾
1% 8.1°C 0mm 93% 0cm -11° 9.1°C 0.1mm 0.08kPa 24135m 1.1m/s 1.1m/s
05:00 ☾
0% 8.2°C 0mm 90% 0cm -5.1° 9.7°C 0.15mm 0.12kPa 24135m 1.2m/s 1.3m/s
06:00
0% 8.3°C 0mm 87% 0cm 2.5° 10°C 0.19mm 0.16kPa 24135m 1.2m/s 1.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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