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Rule Morning Frost

Jukkasjärvi - Morning Frost - Swedish Lapland

Jukkasjärvi, Norrbotten, Sweden

Frost crystals on calm, cold mornings near sunrise

Currently

Real-time conditions
Soil Temperature-1.9°C
Dew Point-1.9°C (low dew point)
Wind Speed7.8m/s (moderate winds)
Cloud Cover78%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Stockholm
Next opportunity
Moderate Frost (radiative) at Sunrise
Jukkasjärvi
Sat, Apr 11 · 05:00–06:35 · 2h window
Low confidence
28%
❄️Frost Probability65-73%
Soil Temperature: -2.0°C
Dew Point: -6.5°C (low dew point)
Wind Speed: 1.5m/s (calm conditions)
Cloud Cover: 6%

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the extreme arctic frost conditions that transform Swedish Lapland into a frozen wonderland. We combine temperature, humidity, wind, and snow data to predict optimal conditions for photographing the region's spectacular frost phenomena.

Swedish Lapland experiences frost conditions as extreme as neighboring Finland, with temperatures regularly dropping below -25°C from December through February. The region's vast frozen lakes, frost-covered birch forests, and ice formations create otherworldly winter landscapes. The famous Abisko microclimate means frost conditions often coincide with clear skies—ideal for photography.

What makes Swedish Lapland special for frost photography:

  • Frozen Torneträsk - Sweden's sixth largest lake freezes solid, creating vast ice plains
  • Abisko clarity - The Blue Hole microclimate provides clear skies for photographing frost
  • Birch forest frost - Frost-covered mountain birch create delicate white forests
  • Ice architecture - The ICEHOTEL and frozen Torne River offer unique frost subjects

Lake Torneträsk freezes completely by midwinter, creating an otherworldly frozen seascape stretching to the horizon. The pressure ridges and ice formations along the shore provide dramatic foreground elements. The mountain birch forests around Abisko become ethereal frost galleries—each delicate branch outlined in white against blue arctic twilight. The Torne River near Jukkasjärvi provides ice harvesting opportunities to photograph—massive blocks cut for the ICEHOTEL construction. At Abisko, the microclimate advantage means you can photograph frost phenomena under clear skies more reliably than elsewhere in Lapland. The combination of extreme cold and the region's unique light makes for spectacular blue hour frost photography.

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72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Stockholm
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Wed, Apr 8
09:0052%4.3m/s
10:0052%5.1m/s
11:0051%6.8m/s
12:0053%8m/s
13:0053%8.6m/s
14:0061%9.3m/s
15:0053%8.7m/s
16:0050%9.1m/s
17:0050%9.2m/s
18:0050%9.6m/s
19:0050%9.4m/s
20:0050%9.1m/s
21:0048%9.6m/s
22:0048%10m/s
23:0048%9.7m/s
Thu, Apr 9
24:0048%9.4m/s
01:0048%9.1m/s
02:0048%8.6m/s
03:0049%8.4m/s
04:0048%8m/s
05:0049%7.6m/s
06:0052%7.3m/s
07:0052%7.4m/s
08:0052%7.9m/s
09:0052%8m/s
10:0049%7.8m/s
11:0048%8.2m/s
12:0051%8.3m/s
13:0051%8.1m/s
14:0051%8m/s
15:0051%8.1m/s
16:0059%8.9m/s
17:0051%8.6m/s
18:0051%7.9m/s
19:0051%7.8m/s
20:0048%7.6m/s
21:0048%7.7m/s
22:0048%7.6m/s
23:0052%7.7m/s
Fri, Apr 10
24:0055%7.3m/s
01:0063%7.2m/s
02:0063%7.4m/s
03:0063%8.2m/s
04:0074%8.9m/s
05:0074%9.2m/s
06:0071%9m/s
07:0074%9m/s
08:0074%9.2m/s
09:0074%9.4m/s
10:0074%9.8m/s
11:0074%10m/s
12:0074%10m/s
13:0079%11m/s
14:0079%10m/s
15:0079%9.7m/s
16:0079%9.4m/s
17:0079%9.1m/s
18:0079%9m/s
19:0074%8.9m/s
20:0070%8.7m/s
21:0074%8.7m/s
22:0074%8.4m/s
23:0074%6.8m/s
Sat, Apr 11
24:0065%4.4m/s
01:0067%3.3m/s
02:0069%2.3m/s
03:0069%1.9m/s
04:0071%1.7m/s
05:0073%1.5m/s
06:0065%1.3m/s
07:0059%1.2m/s
08:0066%1.2m/s
09:0070%1.6m/s
10:0082%2.2m/s
11:0078%2.9m/s
12:0087%3.6m/s
13:0087%3.7m/s
14:0083%3.5m/s
15:0072%2.6m/s
16:0058%1.7m/s
17:0050%0.84m/s
18:0049%1.5m/s
19:0051%2.2m/s
20:0052%3m/s
21:0052%3.2m/s
22:0052%3.5m/s
23:0056%3.8m/s
Sun, Apr 12
24:0059%3.7m/s
01:0062%3.6m/s
02:0066%3.5m/s
03:0074%4m/s
04:0081%4.4m/s
05:0085%4.8m/s
06:0082%5m/s
07:0082%5.1m/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/Stockholm
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Thu, Apr 9 Sunrise 05:14 Sunset 20:06
10:00
-1.9°C -1.9°C 0.003°C - 78% 0.08kPa
11:00
-2.1°C -1.9°C 0.3°C - 82% 0.1kPa
12:00
-1.9°C -1.8°C 0.72°C - 96% 0.11kPa
13:00
-1.4°C -1.8°C 1.1°C - 100% 0.11kPa
14:00
-1°C -1.5°C 1.4°C - 96% 0.11kPa
15:00
-0.8°C -1.6°C 1.5°C - 95% 0.11kPa
16:00
-1.2°C -1.4°C 1.8°C - 100% 0.14kPa
17:00
-0.9°C -1.3°C 2°C - 100% 0.14kPa
18:00
-0.9°C -1.2°C 1.9°C - 100% 0.13kPa
19:00
-0.9°C -1.1°C 1.5°C - 100% 0.11kPa
20:00
-0.8°C -1°C 1°C - 100% 0.08kPa
21:00
-0.8°C -1°C 0.78°C - 100% 0.07kPa
22:00
-1.1°C -1°C 0.57°C - 88% 0.07kPa
23:00
-1.4°C -0.98°C 0.28°C - 53% 0.07kPa
Fri, Apr 10 Sunrise 05:14 Sunset 20:06
24:00
-2.2°C -0.98°C -0.58°C - 28% 0.07kPa
01:00
-3°C -0.98°C -1.2°C - 8% 0.07kPa
02:00
-3.6°C -1°C -1.4°C - 5% 0.08kPa
03:00
-4.3°C -1.1°C -1.6°C - 5% 0.1kPa
04:00
-4.8°C -1.3°C -1.8°C - 5% 0.11kPa
05:00
-5.2°C -1.5°C -2.2°C - 5% 0.11kPa
06:00
-5.4°C -1.7°C -2.3°C - 5% 0.1kPa
07:00
-5.1°C -1.9°C -2°C - 5% 0.11kPa
08:00
-4.6°C -1.9°C -1.3°C - 5% 0.12kPa
09:00
-3.7°C -1.9°C -0.34°C - 5% 0.13kPa
10:00
-3°C -1.9°C 0.51°C - 5% 0.14kPa
11:00
-2.4°C -1.7°C 1.3°C - 5% 0.16kPa
12:00
-2.1°C -1.5°C 2.1°C - 5% 0.18kPa
13:00
-2°C -1.2°C 2.6°C - 3% 0.21kPa
14:00
-2°C -1°C 3°C - 4% 0.23kPa
15:00
-2°C -0.73°C 3.2°C - 1% 0.24kPa
16:00
-2.2°C -0.53°C 3.2°C - 0% 0.25kPa
17:00
-2.5°C -0.45°C 3.1°C - 4% 0.25kPa
18:00
-2.9°C -0.35°C 2.3°C - 5% 0.23kPa
19:00
-3.3°C -0.35°C 1.4°C - 3% 0.2kPa
20:00
-3.9°C -0.35°C 0.44°C - 10% 0.17kPa
21:00
-4.4°C -0.34°C -0.29°C - 2% 0.16kPa
22:00
-4.4°C -0.34°C -0.69°C - 5% 0.14kPa
23:00
-4.4°C -0.34°C -1.3°C - 5% 0.12kPa
Sat, Apr 11 Sunrise 05:09 Sunset 20:10
24:00
-4.8°C -0.38°C -2.2°C - 5% 0.09kPa
01:00
-5.3°C -0.62°C -3°C - 5% 0.08kPa
02:00
-5.8°C -0.92°C -3.7°C - 5% 0.07kPa
03:00
-6.1°C -1.3°C -4.1°C - 6% 0.06kPa
04:00
-6.2°C -1.6°C -4.4°C - 6% 0.06kPa
05:00
-6.5°C -2°C -4.9°C - 6% 0.05kPa
06:00
-6.8°C -2.5°C -4.9°C - 34% 0.06kPa
07:00
-6.7°C -2.7°C -4.3°C - 61% 0.07kPa
08:00
-6.4°C -2.7°C -3.3°C - 93% 0.1kPa
09:00
-6.1°C -2.5°C -2.4°C - 71% 0.12kPa
10:00
-6°C -2.1°C -1.5°C - 5% 0.16kPa
11:00
-5.8°C -1.6°C -0.4°C - 5% 0.2kPa
12:00
-5.3°C -1.2°C 0.85°C - 5% 0.24kPa
13:00
-4.4°C -0.75°C 1.9°C - 5% 0.26kPa
14:00
-3.8°C -0.41°C 2.6°C - 11% 0.27kPa
15:00
-3°C -0.24°C 1.1°C - 31% 0.17kPa
16:00
-2.5°C -0.06°C -0.41°C - 52% 0.08kPa
17:00
-2.2°C 0.12°C -1.9°C - 73% 0.01kPa
18:00
-2.2°C 0.07°C -1.5°C - 82% 0.03kPa
19:00
-2.2°C 0.03°C -1°C - 91% 0.05kPa
20:00
-2.2°C -0.01°C -0.58°C - 100% 0.06kPa
21:00
-2.2°C -0.05°C -0.3°C - 93% 0.08kPa
22:00
-2.3°C -0.09°C -0.02°C - 85% 0.09kPa
23:00
-2.4°C -0.13°C 0.25°C - 78% 0.11kPa
Sun, Apr 12 Sunrise 05:05 Sunset 20:14
24:00
-2.3°C -0.14°C 0.34°C - 57% 0.11kPa
01:00
-2.2°C -0.15°C 0.43°C - 36% 0.11kPa
02:00
-2°C -0.16°C 0.52°C - 14% 0.11kPa
03:00
-2.4°C -0.11°C 1.4°C - 11% 0.16kPa
04:00
-2.9°C -0.06°C 2.2°C - 8% 0.22kPa
05:00
-3.5°C -0.01°C 3°C - 5% 0.29kPa
06:00
-3.4°C 0.06°C 3.6°C - 5% 0.32kPa
07:00
-3.2°C 0.12°C 4.2°C - 5% 0.35kPa
08:00
-3.2°C 0.19°C 4.8°C - 6% 0.38kPa
09:00
-2.9°C 0.18°C 4.6°C - 17% 0.36kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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