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More Morning Frost in Finnish Lapland
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Rule Morning Frost

Ivalo - Morning Frost - Finnish Lapland

Ivalo, Lapland, Finland

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)
Wind Speed 99% failing
Time Window 83% failing
Frost Probability 71% failing

Currently

Real-time conditions
Frost Probability
51%
Soil Temperature0.1°C
Dew Point0.3°C (low dew point)
Wind Speed2.1m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

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 extreme arctic frost conditions that make Finnish Lapland a winter photographer's paradise. We combine temperature, humidity, wind, and snow data to predict when the region's legendary frost phenomena will occur.

Finnish Lapland experiences frost conditions unlike anywhere else in accessible Europe. Temperatures routinely drop to -30°C or colder from December through February, creating frost phenomena that must be seen to be believed. The region's unique combination of humid air from the Atlantic meeting extreme cold creates the spectacular "tykkylumi" or crown snow phenomenon—where every tree branch becomes encased in thick layers of frost and snow.

What makes Finnish Lapland special for frost photography:

  • Tykkylumi crown snow - Trees completely transformed into white sculptures by accumulated frost and snow
  • Extreme cold tolerance - Consistent temperatures of -20°C to -40°C create reliable frost conditions
  • Ice flowers - Lake Inari and smaller water bodies develop crystalline ice formations
  • Frozen waterfalls - Waterfalls freeze into spectacular ice sculptures

Riisitunturi National Park near Kuusamo is world-famous for tykkylumi—every spruce tree on the fell tops becomes a ghostly white sentinel, transformed by weeks of accumulated frost. The phenomenon occurs when supercooled fog droplets freeze instantly on contact with trees, building up thick layers. Pallas-Yllästunturi offers similar conditions with the added drama of fell landscapes. At -30°C, even your breath creates instant frost crystals in the air, and any exposed water generates spectacular ice formations. The key is visiting during stable cold periods in midwinter—our forecast identifies when conditions favor crown snow accumulation and tracks visibility for photography.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 86 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Tue, Apr 21
07:00✕63%1.6m/s
08:00✕63%1.5m/s
09:00✕71%1.2m/s
10:00✕58%2.2m/s
11:00✕63%3.4m/s
12:00✕68%3.9m/s
13:00✕68%4m/s
14:00✕65%3.5m/s
15:00✕67%2.6m/s
16:00✕59%3.4m/s
17:00✕52%3.5m/s
18:00✕50%4m/s
19:00✕47%4.7m/s
20:00✕50%4.3m/s
21:00✕52%3.2m/s
22:00✕51%2.1m/s
23:00✕53%1.5m/s
Wed, Apr 22
24:00✕51%2.3m/s
01:00✕49%3.8m/s
02:00✕45%8.2m/s
03:00✓56%7.7m/s
04:00✓57%7.5m/s
05:00✓71%7.9m/s
06:00✓71%8.3m/s
07:00✕71%11m/s
08:00✕57%11m/s
09:00✕56%9.8m/s
10:00✕57%9.5m/s
11:00✕71%11m/s
12:00✕76%10m/s
13:00✕80%9.8m/s
14:00✕80%9.8m/s
15:00✕76%9.9m/s
16:00✕69%9.6m/s
17:00✕61%8.9m/s
18:00✕56%8.3m/s
19:00✕56%8.3m/s
20:00✕56%8.2m/s
21:00✕56%7.2m/s
22:00✕56%6.5m/s
23:00✕56%6m/s
Thu, Apr 23
24:00✕58%5.4m/s
01:00✕58%5.1m/s
02:00✕62%4.8m/s
03:00✓49%3.9m/s
04:00✓47%4.3m/s
05:00✓47%5.2m/s
06:00✓47%4.5m/s
07:00✕45%6.2m/s
08:00✕56%6.5m/s
09:00✕56%6.5m/s
10:00✕56%6.3m/s
11:00✕56%6.5m/s
12:00✕56%6.1m/s
13:00✕56%6.3m/s
14:00✕61%5.9m/s
15:00✕63%5.1m/s
16:00✕65%4.2m/s
17:00✕60%3.9m/s
18:00✕60%3m/s
19:00✕51%2m/s
20:00✕47%1.8m/s
21:00✕47%2.3m/s
22:00✕49%1.6m/s
23:00✕47%2.1m/s
Fri, Apr 24
24:00✕48%2.2m/s
01:00✕45%2.9m/s
02:00✕47%2.1m/s
03:00✓47%4.3m/s
04:00✓60%4.1m/s
05:00✓60%3.8m/s
06:00✓69%3.6m/s
07:00✕60%3m/s
08:00✕62%2.4m/s
09:00✕54%1.8m/s
10:00✕53%1.6m/s
11:00✕53%1.5m/s
12:00✕53%1.4m/s
13:00✕51%2.2m/s
14:00✕45%3.1m/s
15:00✕45%3.9m/s
16:00✕43%4.4m/s
17:00✕43%5m/s
18:00✕43%5.5m/s
19:00✕47%5.4m/s
20:00✕47%5.4m/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/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Tue, Apr 21 Sunrise 04:48 Sunset 21:31
22:00 ☾
0.3°C 0.15°C 2.1°C - 100% 0.09kPa
23:00 ☾
-0.9°C 0.12°C 0.27°C - 100% 0.05kPa
Wed, Apr 22 Sunrise 04:48 Sunset 21:31
24:00 ☾
-0.5°C 0.11°C 0.66°C - 100% 0.05kPa
01:00 ☾
-0.1°C 0.1°C 1.6°C - 100% 0.08kPa
02:00 ☾
1.3°C 0.12°C 3.2°C - 99% 0.1kPa
03:00 ☾
-0.3°C 0.12°C 2.8°C - 95% 0.15kPa
04:00 ☾
-2.1°C 0.13°C 1.7°C - 75% 0.17kPa
05:00
-3.8°C 0.13°C 0.63°C - 5% 0.18kPa
06:00
-4.2°C 0.12°C 0.45°C - 5% 0.18kPa
07:00
-4.3°C 0.11°C 0.71°C - 5% 0.2kPa
08:00
-2.7°C 0.1°C 0.71°C - 63% 0.14kPa
09:00
-3.6°C 0.1°C -0.08°C - 98% 0.14kPa
10:00
-5.6°C 0.1°C -1.1°C - 75% 0.16kPa
11:00
-7.1°C 0.17°C -1.4°C - 1% 0.19kPa
12:00
-7.6°C 0.17°C -1.2°C - 10% 0.21kPa
13:00
-7.3°C 0.17°C -0.89°C - 5% 0.22kPa
14:00
-7°C 0.17°C -0.67°C - 8% 0.22kPa
15:00
-6.8°C 0.25°C -0.49°C - 14% 0.22kPa
16:00
-6.8°C 0.37°C -0.47°C - 49% 0.22kPa
17:00
-6.4°C 0.37°C -0.65°C - 100% 0.21kPa
18:00
-5.9°C 0.27°C -0.73°C - 100% 0.18kPa
19:00
-5.6°C 0.27°C -0.99°C - 100% 0.17kPa
20:00
-5.9°C 0.27°C -1.6°C - 100% 0.15kPa
21:00
-6.1°C 0.27°C -2°C - 100% 0.14kPa
22:00 ☾
-5.7°C 0.27°C -2.2°C - 96% 0.12kPa
23:00 ☾
-5.4°C 0.27°C -2.1°C - 97% 0.11kPa
Thu, Apr 23 Sunrise 04:43 Sunset 21:36
24:00 ☾
-5.2°C 0.28°C -2.1°C - 93% 0.11kPa
01:00 ☾
-5.1°C 0.28°C -2.1°C - 92% 0.11kPa
02:00 ☾
-5°C 0.27°C -1.7°C - 52% 0.12kPa
03:00 ☾
-4.9°C 0.27°C -2°C - 100% 0.1kPa
04:00 ☾
-3.8°C 0.27°C -1.2°C - 100% 0.1kPa
05:00
-2.8°C 0.26°C -0.31°C - 100% 0.1kPa
06:00
-1.6°C 0.18°C -0.47°C - 100% 0.05kPa
07:00
-2°C 0.15°C 0.31°C - 100% 0.1kPa
08:00
-2.4°C 0.14°C 0.73°C - 100% 0.13kPa
09:00
-2.1°C 0.14°C 1.2°C - 100% 0.14kPa
10:00
-1.8°C 0.15°C 1.5°C - 99% 0.14kPa
11:00
-1.6°C 0.15°C 1.8°C - 100% 0.15kPa
12:00
-1.7°C 0.15°C 2°C - 100% 0.16kPa
13:00
-2°C 0.17°C 2.3°C - 100% 0.19kPa
14:00
-2.4°C 0.17°C 2.3°C - 100% 0.21kPa
15:00
-2.5°C 0.17°C 2.4°C - 100% 0.22kPa
16:00
-2.5°C 0.17°C 2.4°C - 100% 0.22kPa
17:00
-2.1°C 0.17°C 2.2°C - 100% 0.19kPa
18:00
-1.2°C 0.27°C 1.9°C - 100% 0.14kPa
19:00
0°C 0.37°C 1.4°C - 100% 0.07kPa
20:00
0.8°C 0.47°C 0.9°C - 100% 0kPa
21:00
0.7°C 0.47°C 0.9°C - 100% 0.01kPa
22:00 ☾
0.5°C 0.45°C 0.72°C - 100% 0.01kPa
23:00 ☾
0.3°C 0.4°C 0.55°C - 92% 0.01kPa
Fri, Apr 24 Sunrise 04:39 Sunset 21:40
24:00 ☾
-0.6°C 0.35°C -0.006°C - 79% 0.03kPa
01:00 ☾
-1°C 0.35°C -0.52°C - 100% 0.02kPa
02:00 ☾
-0.7°C 0.3°C 0.25°C - 100% 0.04kPa
03:00 ☾
-1.3°C 0.27°C 0.69°C - 100% 0.09kPa
04:00 ☾
-2.6°C 0.21°C 0.73°C - 100% 0.14kPa
05:00
-4°C 0.14°C 0.76°C - 100% 0.19kPa
06:00
-5.5°C 0.07°C 0.79°C - 100% 0.24kPa
07:00
-4.5°C 0.07°C 0.5°C - 100% 0.2kPa
08:00
-3.6°C 0.07°C 0.21°C - 100% 0.15kPa
09:00
-2.8°C 0.07°C -0.08°C - 100% 0.11kPa
10:00
-2.4°C 0.06°C -0.15°C - 100% 0.09kPa
11:00
-2.1°C 0.06°C -0.22°C - 100% 0.08kPa
12:00
-1.8°C 0.05°C -0.29°C - 100% 0.06kPa
13:00
-1.9°C 0.09°C -0.81°C - 100% 0.05kPa
14:00
-2.1°C 0.13°C -1.3°C - 100% 0.03kPa
15:00
-2.3°C 0.17°C -1.8°C - 100% 0.02kPa
16:00
-2.7°C 0.15°C -2.2°C - 100% 0.02kPa
17:00
-3.2°C 0.13°C -2.5°C - 100% 0.02kPa
18:00
-3.6°C 0.11°C -2.9°C - 100% 0.02kPa
19:00
-4.4°C 0.11°C -3.3°C - 100% 0.04kPa
20:00
-5.3°C 0.11°C -3.7°C - 100% 0.05kPa
21:00
-6.2°C 0.11°C -4°C - 100% 0.07kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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