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Rule Morning Frost

Gällivare - Morning Frost - Swedish Lapland

Gällivare, Norrbotten, Sweden

Frost crystals on calm, cold mornings near sunrise

Currently

Real-time conditions
Soil Temperature-1.2°C
Dew Point-2.5°C (low dew point)
Wind Speed5.7m/s (moderate winds)
Cloud Cover91%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Stockholm
Next opportunity
Light Frost at Dawn
Gällivare
Fri, Apr 17 · 03:59–04:00 · 1h window
Low confidence
33%
❄️Frost Probability65%
Soil Temperature: 0.5°C
Dew Point: -0.5°C (low dew point)
Wind Speed: 1.1m/s (calm conditions)
Cloud Cover: 69%

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
0matching hours in the next 95 hours
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
03:0053%1.3m/s
04:0052%1.1m/s
05:0052%0.98m/s
06:0052%1.1m/s
07:0050%1.9m/s
08:0054%1.8m/s
09:0054%2.1m/s
10:0054%2.6m/s
11:0052%3.6m/s
12:0050%4.6m/s
13:0050%5.3m/s
14:0049%5.8m/s
15:0050%5.6m/s
16:0050%5.5m/s
17:0048%5.9m/s
18:0048%6.5m/s
19:0048%6.5m/s
20:0048%6.6m/s
21:0048%6.7m/s
22:0048%6.5m/s
23:0048%6.4m/s
Thu, Apr 9
24:0048%6.2m/s
01:0048%6.3m/s
02:0048%6m/s
03:0048%5.8m/s
04:0048%5.7m/s
05:0051%5.3m/s
06:0050%4.9m/s
07:0051%5.1m/s
08:0054%5.3m/s
09:0054%5.4m/s
10:0049%5.6m/s
11:0048%5.9m/s
12:0048%6.4m/s
13:0048%5.9m/s
14:0048%6m/s
15:0048%5.8m/s
16:0046%5.5m/s
17:0046%5.5m/s
18:0044%5.7m/s
19:0048%5.7m/s
20:0048%5.7m/s
21:0050%5.6m/s
22:0050%5.3m/s
23:0050%5.1m/s
Fri, Apr 10
24:0054%4.9m/s
01:0065%4.7m/s
02:0065%4.9m/s
03:0065%5.1m/s
04:0065%5.5m/s
05:0074%5.8m/s
06:0074%5.7m/s
07:0074%5.8m/s
08:0074%6.1m/s
09:0063%6.3m/s
10:0070%6.8m/s
11:0074%7.2m/s
12:0074%7m/s
13:0074%6.7m/s
14:0066%6.5m/s
15:0066%6.5m/s
16:0066%6.2m/s
17:0052%6.1m/s
18:0053%5.5m/s
19:0051%5.2m/s
20:0065%4.8m/s
21:0065%4.6m/s
22:0065%4.3m/s
23:0067%4m/s
Sat, Apr 11
24:0067%3.5m/s
01:0063%3.1m/s
02:0052%2.9m/s
03:0054%2.8m/s
04:0065%2.7m/s
05:0058%2.4m/s
06:0054%2.5m/s
07:0062%2.5m/s
08:0064%2.9m/s
09:0067%3m/s
10:0062%3.2m/s
11:0063%3.3m/s
12:0056%3.2m/s
13:0049%3m/s
14:0048%2.9m/s
15:0051%2.6m/s
16:0051%2.3m/s
17:0054%1.9m/s
18:0054%2m/s
19:0051%2m/s
20:0050%2m/s
21:0050%2m/s
22:0050%2m/s
23:0050%2m/s
Sun, Apr 12
24:0058%1.9m/s
01:0064%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/Stockholm
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Thu, Apr 9 Sunrise 05:17 Sunset 20:03
04:00
-2.5°C -1.2°C -1.2°C - 91% 0.05kPa
05:00
-3.1°C -1.2°C -1.8°C - 77% 0.05kPa
06:00
-3.6°C -1.2°C -2.3°C - 82% 0.05kPa
07:00
-3.7°C -1.2°C -2.3°C - 62% 0.05kPa
08:00
-3.7°C -1.2°C -1.9°C - 58% 0.07kPa
09:00
-3.5°C -1.2°C -1.4°C - 51% 0.08kPa
10:00
-2.8°C -1.2°C -0.66°C - 66% 0.08kPa
11:00
-1.9°C -1.1°C -0.15°C - 94% 0.07kPa
12:00
-1.6°C -1.1°C 0.19°C - 100% 0.08kPa
13:00
-1.1°C -1°C 0.34°C - 100% 0.06kPa
14:00
-0.7°C -1°C 0.76°C - 100% 0.07kPa
15:00
-0.3°C -1°C 0.89°C - 100% 0.05kPa
16:00
-0.1°C -0.91°C 0.75°C - 100% 0.04kPa
17:00
0°C -0.93°C 0.77°C - 100% 0.03kPa
18:00
-0.2°C -0.83°C 0.71°C - 100% 0.04kPa
19:00
-0.5°C -0.83°C 0.57°C - 100% 0.05kPa
20:00
-0.7°C -0.83°C 0.33°C - 100% 0.05kPa
21:00
-1°C -0.79°C 0.17°C - 100% 0.05kPa
22:00
-1.5°C -0.78°C -0.02°C - 100% 0.06kPa
23:00
-2.2°C -0.78°C -0.23°C - 97% 0.08kPa
Fri, Apr 10 Sunrise 05:17 Sunset 20:03
24:00
-3°C -0.78°C -0.62°C - 42% 0.09kPa
01:00
-4.3°C -0.77°C -1.7°C - 5% 0.09kPa
02:00
-5°C -0.78°C -2.1°C - 5% 0.1kPa
03:00
-5.5°C -0.81°C -2.3°C - 50% 0.11kPa
04:00
-5.8°C -0.88°C -2.5°C - 41% 0.11kPa
05:00
-6°C -0.94°C -2.6°C - 6% 0.11kPa
06:00
-6°C -1°C -2.8°C - 5% 0.11kPa
07:00
-5.7°C -1.1°C -2.3°C - 5% 0.11kPa
08:00
-5°C -1.1°C -1.6°C - 5% 0.12kPa
09:00
-4.2°C -1.1°C -0.86°C - 50% 0.12kPa
10:00
-3.3°C -1.1°C -0.16°C - 18% 0.12kPa
11:00
-2.2°C -1.1°C 0.88°C - 10% 0.13kPa
12:00
-1.5°C -1°C 1.6°C - 5% 0.14kPa
13:00
-0.9°C -0.83°C 2.1°C - 5% 0.14kPa
14:00
-0.5°C -0.73°C 2.4°C - 5% 0.13kPa
15:00
-0.4°C -0.73°C 2.5°C - 5% 0.13kPa
16:00
-0.3°C -0.63°C 2.3°C - 5% 0.13kPa
17:00
-0.6°C -0.53°C 1.8°C - 68% 0.11kPa
18:00
-1.3°C -0.53°C 1.1°C - 100% 0.11kPa
19:00
-2.2°C -0.53°C 0.26°C - 78% 0.1kPa
20:00
-3.2°C -0.53°C -0.84°C - 5% 0.09kPa
21:00
-3.4°C -0.53°C -1.2°C - 5% 0.08kPa
22:00
-3.4°C -0.51°C -1.5°C - 5% 0.07kPa
23:00
-3.7°C -0.51°C -1.8°C - 5% 0.07kPa
Sat, Apr 11 Sunrise 05:12 Sunset 20:06
24:00
-4.1°C -0.51°C -2.5°C - 5% 0.06kPa
01:00
-4.9°C -0.51°C -3.4°C - 13% 0.05kPa
02:00
-5.3°C -0.6°C -3.7°C - 92% 0.05kPa
03:00
-5.5°C -0.7°C -3.5°C - 100% 0.07kPa
04:00
-5.9°C -0.79°C -3.7°C - 24% 0.07kPa
05:00
-6.5°C -0.89°C -4.3°C - 53% 0.07kPa
06:00
-6.3°C -1.1°C -4.1°C - 97% 0.07kPa
07:00
-5.6°C -1.2°C -2.5°C - 98% 0.1kPa
08:00
-4.9°C -1.2°C -0.7°C - 68% 0.16kPa
09:00
-3.1°C -0.98°C 0.22°C - 54% 0.14kPa
10:00
-1.4°C -0.75°C 1.2°C - 39% 0.11kPa
11:00
0.3°C -0.51°C 2.1°C - 25% 0.08kPa
12:00
-0.1°C -0.45°C 1.2°C - 49% 0.06kPa
13:00
-0.5°C -0.39°C 0.35°C - 74% 0.04kPa
14:00
-1°C -0.33°C -0.51°C - 98% 0.02kPa
15:00
-1.3°C -0.34°C -0.84°C - 80% 0.02kPa
16:00
-1.7°C -0.34°C -1.2°C - 62% 0.02kPa
17:00
-2°C -0.35°C -1.5°C - 44% 0.02kPa
18:00
-2.3°C -0.36°C -1.9°C - 58% 0.02kPa
19:00
-2.6°C -0.37°C -2.2°C - 72% 0.01kPa
20:00
-2.8°C -0.38°C -2.6°C - 86% 0.01kPa
21:00
-3°C -0.44°C -2.7°C - 86% 0.01kPa
22:00
-3.1°C -0.49°C -2.9°C - 86% 0.01kPa
23:00
-3.3°C -0.54°C -3°C - 86% 0.01kPa
Sun, Apr 12 Sunrise 05:08 Sunset 20:10
24:00
-3.8°C -0.64°C -2.3°C - 59% 0.06kPa
01:00
-4.4°C -0.74°C -1.5°C - 32% 0.11kPa
02:00
-5.2°C -0.85°C -0.79°C - 5% 0.16kPa
03:00
-5°C -0.81°C 0.33°C - 9% 0.2kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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