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Rule Morning Frost

Verbier - Morning Frost - Alps

Verbier, Valais, Switzerland

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

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Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 71% failing

Currently

Real-time conditions
Soil Temperature13.6°C
Dew Point3.0°C (low dew point)
Wind Speed3.6m/s (calm conditions)
Cloud Cover6%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich

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 conditions that create spectacular frost photography opportunities in the Alps. We combine temperature, dewpoint, humidity, and wind data to predict when hoar frost will transform Alpine landscapes into crystalline wonderlands.

The European Alps offer frost photography opportunities from valley floors to high peaks. Clear, calm nights following periods of humidity create heavy hoar frost deposits that coat everything in ice crystals. Alpine waterfalls freeze into spectacular ice sculptures, traditional chalets become fairy-tale scenes, and frozen mountain lakes offer mirror-like surfaces reflecting frost-covered peaks.

What makes the Alps special for frost photography:

  • Alpine village charm - Traditional chalets and churches encrusted with hoar frost crystals
  • Frozen waterfalls - Spectacular ice formations at Lauterbrunnen and other waterfall locations
  • High-altitude frost - Matterhorn and other peaks develop dramatic rime ice formations
  • Frozen lakes - Alpine lakes freeze solid, creating pristine foregrounds for mountain photography

Zermatt's traditional wooden chalets become postcard-perfect when covered in thick hoar frost, with the Matterhorn rising behind. Lauterbrunnen's famous waterfalls partially freeze, creating dramatic ice curtains and pillars. High-altitude locations develop spectacular rime ice—the fine ice feathers that coat everything on exposed peaks. Frozen mountain lakes like those in St. Moritz's Engadin Valley become skating rinks with 4,000m peaks reflected in perfectly smooth ice. The car-free villages of Wengen and Mürren offer pristine frost scenes without modern intrusions. The key is timing—our forecast identifies clear, cold nights that produce heavy frost, and predicts morning conditions for photography before sun melts the formations.

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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
Europe/Zurich
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sun, May 24
06:000%2.7m/s
07:003%2.9m/s
08:003.6%1.8m/s
09:000%0.5m/s
10:000%1.2m/s
11:000%2.1m/s
12:000%3m/s
13:000%3.7m/s
14:000%3.7m/s
15:000%3.6m/s
16:000%4.2m/s
17:000%2.2m/s
18:000%1.6m/s
19:000%1m/s
20:000%0.4m/s
21:000%0.47m/s
22:000%1.2m/s
23:000%1.3m/s
Mon, May 25
24:000%3m/s
01:000%3.1m/s
02:000%2.7m/s
03:000%2.9m/s
04:000%2.8m/s
05:000%2.5m/s
06:000%2.1m/s
07:000%1.8m/s
08:000%0.43m/s
09:000%0.52m/s
10:000%1m/s
11:000%1.6m/s
12:000%2.3m/s
13:000%3.2m/s
14:000%3.8m/s
15:000%3.5m/s
16:000%3.7m/s
17:000%3.2m/s
18:000%2.8m/s
19:000%2.5m/s
20:000%1.9m/s
21:000%0.78m/s
22:000%0.5m/s
23:000%0.95m/s
Tue, May 26
24:000%1.6m/s
01:000%1.9m/s
02:000%1.7m/s
03:000%1.9m/s
04:000%1.7m/s
05:000%1.6m/s
06:000%1.4m/s
07:000%1.3m/s
08:000%0.36m/s
09:000%0.72m/s
10:000%1.2m/s
11:000%1.8m/s
12:000%2.4m/s
13:000%3m/s
14:000%3.3m/s
15:000%3.3m/s
16:000%3.7m/s
17:000%4m/s
18:000%3.3m/s
19:000%2.8m/s
20:000%2.6m/s
21:000%2.1m/s
22:000%1.6m/s
23:000%1.2m/s
Wed, May 27
24:000%0.87m/s
01:000%0.58m/s
02:000%0.3m/s
03:000%0.91m/s
04:000%1.5m/s
05:000%2.1m/s
06:000%2.3m/s
07:000%2.5m/s
08:000%2.6m/s
09:000%2.5m/s
10:000%2.4m/s
11:000%2.4m/s
12:000%2.1m/s
13:000%1.9m/s
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Frost 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
Europe/Zurich
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, May 24 Sunrise 05:49 Sunset 21:06
15:00
3°C 14°C 16°C - 6% 1.1kPa
16:00
3.1°C 14°C 16°C - 18% 1.1kPa
17:00
4.2°C 15°C 15°C - 56% 0.92kPa
18:00
5.8°C 15°C 14°C - 46% 0.65kPa
19:00
6.2°C 15°C 13°C - 42% 0.53kPa
20:00
6.8°C 15°C 12°C - 96% 0.39kPa
21:00
6°C 14°C 9.2°C - 44% 0.23kPa
22:00
5.5°C 14°C 8.5°C - 79% 0.21kPa
23:00
6.1°C 13°C 9.2°C - 76% 0.23kPa
Mon, May 25 Sunrise 05:49 Sunset 21:06
24:00
4.8°C 13°C 9.3°C - 49% 0.31kPa
01:00
4.1°C 12°C 8.8°C - 49% 0.31kPa
02:00
3.4°C 12°C 8.5°C - 78% 0.33kPa
03:00
3.2°C 11°C 8.5°C - 5% 0.34kPa
04:00
2.7°C 11°C 8°C - 5% 0.33kPa
05:00
2.1°C 10°C 7.6°C - 5% 0.33kPa
06:00
1.6°C 9.9°C 7.2°C - 5% 0.33kPa
07:00
3.3°C 9.6°C 9°C - 5% 0.37kPa
08:00
3.6°C 9.8°C 11°C - 2% 0.55kPa
09:00
3.5°C 10°C 12°C - 13% 0.65kPa
10:00
3.8°C 11°C 13°C - 35% 0.72kPa
11:00
4.4°C 11°C 14°C - 5% 0.78kPa
12:00
5°C 12°C 15°C - 5% 0.84kPa
13:00
5.6°C 13°C 16°C - 62% 0.88kPa
14:00
6°C 14°C 16°C - 52% 0.89kPa
15:00
5.7°C 14°C 16°C - 56% 0.9kPa
16:00
6°C 15°C 16°C - 86% 0.86kPa
17:00
8°C 15°C 14°C - 96% 0.53kPa
18:00
8.8°C 15°C 13°C - 95% 0.38kPa
19:00
9°C 15°C 12°C - 100% 0.29kPa
20:00
8.8°C 14°C 11°C - 98% 0.21kPa
21:00
8.4°C 14°C 10°C - 100% 0.16kPa
22:00
7.8°C 14°C 9.6°C - 100% 0.14kPa
23:00
7.2°C 13°C 9.3°C - 100% 0.15kPa
Tue, May 26 Sunrise 05:48 Sunset 21:07
24:00
6.8°C 13°C 9.3°C - 100% 0.19kPa
01:00
6°C 12°C 9.1°C - 32% 0.22kPa
02:00
5.8°C 12°C 8.6°C - 15% 0.2kPa
03:00
5.5°C 11°C 8.4°C - 8% 0.19kPa
04:00
5.3°C 11°C 8.1°C - 5% 0.19kPa
05:00
5°C 11°C 7.9°C - 2% 0.19kPa
06:00
4.9°C 10°C 7.7°C - 1% 0.19kPa
07:00
6.3°C 10°C 9.6°C - 1% 0.24kPa
08:00
6.7°C 10°C 12°C - 1% 0.4kPa
09:00
7°C 10°C 13°C - 4% 0.47kPa
10:00
7.3°C 11°C 14°C - 5% 0.53kPa
11:00
7.7°C 12°C 15°C - 13% 0.62kPa
12:00
8°C 13°C 15°C - 26% 0.66kPa
13:00
8.3°C 13°C 16°C - 50% 0.66kPa
14:00
8.4°C 14°C 16°C - 71% 0.7kPa
15:00
7.9°C 15°C 16°C - 77% 0.78kPa
16:00
7.9°C 15°C 16°C - 98% 0.76kPa
17:00
8.3°C 15°C 15°C - 100% 0.63kPa
18:00
8.7°C 15°C 14°C - 100% 0.5kPa
19:00
8.7°C 15°C 14°C - 100% 0.42kPa
20:00
9°C 15°C 12°C - 100% 0.29kPa
21:00
8.3°C 13°C 11°C - 80% 0.24kPa
22:00
7.6°C 11°C 10°C - 61% 0.2kPa
23:00
6.9°C 9.7°C 9.1°C - 41% 0.16kPa
Wed, May 27 Sunrise 05:48 Sunset 21:08
24:00
7.7°C 9.5°C 10°C - 29% 0.2kPa
01:00
8.5°C 9.4°C 12°C - 17% 0.25kPa
02:00
9.3°C 9.2°C 13°C - 5% 0.3kPa
03:00
9.3°C 9.6°C 14°C - 8% 0.42kPa
04:00
9.1°C 10°C 15°C - 11% 0.55kPa
05:00
8.8°C 10°C 16°C - 14% 0.7kPa
06:00
8.5°C 11°C 17°C - 39% 0.8kPa
07:00
8.2°C 12°C 18°C - 65% 0.91kPa
08:00
7.8°C 12°C 18°C - 90% 1kPa
09:00
9°C 13°C 17°C - 69% 0.83kPa
10:00
9.9°C 13°C 16°C - 48% 0.65kPa
11:00
11°C 13°C 16°C - 26% 0.48kPa
12:00
11°C 13°C 15°C - 26% 0.42kPa
13:00
11°C 13°C 15°C - 26% 0.36kPa
14:00
11°C 13°C 14°C - 25% 0.3kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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