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Rule Morning Frost

Riksgränsen - Morning Frost - Swedish Lapland

Riksgränsen, Norrbotten, Sweden

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)
Time Window 100% failing
Frost Probability 97% failing
Wind Speed 60% failing

Currently

Real-time conditions
Soil Temperature4.3°C
Dew Point4.8°C (low dew point)
Wind Speed0.6m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Stockholm

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 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 80 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
Sun, May 24
06:00-15%0.87m/s
07:00-15%1m/s
08:00-17%0.75m/s
09:00-17%0.65m/s
10:00-17%0.76m/s
11:00-17%0.74m/s
12:00-15%0.87m/s
13:00-17%0.49m/s
14:00-15%0.85m/s
15:00-17%0.61m/s
16:00-15%1.3m/s
17:00-15%1.5m/s
18:00-15%1.3m/s
19:00-17%0.95m/s
20:00-17%1m/s
21:00-17%1.1m/s
22:00-17%1.2m/s
23:00-17%1.7m/s
Mon, May 25
24:00-17%1.6m/s
01:00-17%1.5m/s
02:00-19%1.7m/s
03:00-17%1.6m/s
04:00-22%1.9m/s
05:00-22%2.3m/s
06:00-22%2.3m/s
07:00-22%2.1m/s
08:00-22%2m/s
09:00-22%2.5m/s
10:00-20%3m/s
11:00-28%3.1m/s
12:00-28%3.4m/s
13:00-31%3.7m/s
14:00-31%3.2m/s
15:00-20%2.6m/s
16:00-17%2.2m/s
17:00-13%2.4m/s
18:00-13%2.4m/s
19:00-26%1.6m/s
20:00-33%1.1m/s
21:00-33%0.92m/s
22:00-35%0.84m/s
23:00-36%0.95m/s
Tue, May 26
24:00-43%0.92m/s
01:00-29%0.95m/s
02:00-31%1.4m/s
03:00-37%2m/s
04:00-37%2.3m/s
05:00-53%2.3m/s
06:00-57%2.1m/s
07:00-61%1.8m/s
08:00-61%1.9m/s
09:00-48%1.3m/s
10:00-41%0.86m/s
11:00-39%0.81m/s
12:00-39%1.2m/s
13:00-3.8%1.1m/s
14:00-4%0.54m/s
15:00-4.1%0.23m/s
16:00-0%0.36m/s
17:00-0%0.26m/s
18:00-0%0.59m/s
19:00-0%1.1m/s
20:00-0%1.2m/s
21:00-2.9%1.3m/s
22:00-23%1.4m/s
23:00-25%1.6m/s
Wed, May 27
24:00-22%1.7m/s
01:00-18%1.8m/s
02:00-17%1.9m/s
03:00-17%2m/s
04:00-17%2.1m/s
05:00-13%2.2m/s
06:00-17%2.3m/s
07:00-17%2.3m/s
08:00-20%2.4m/s
09:00-20%2.4m/s
10:00-17%2.5m/s
11:00-13%2.5m/s
12:00-13%2.4m/s
13:00-13%2.3m/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
Sun, May 24
15:00
4.8°C 4.3°C 5.3°C - 100% 0.03kPa
16:00
4.5°C 4.3°C 5.1°C - 100% 0.04kPa
17:00
4.2°C 4.2°C 4.8°C - 100% 0.03kPa
18:00
3.7°C 4.1°C 4.3°C - 100% 0.04kPa
19:00
3.5°C 4°C 4°C - 100% 0.03kPa
20:00
3.6°C 3.9°C 4°C - 100% 0.02kPa
21:00
3.5°C 3.8°C 3.9°C - 100% 0.03kPa
22:00
3.3°C 3.7°C 3.8°C - 100% 0.03kPa
23:00
3.4°C 3.5°C 3.9°C - 100% 0.03kPa
Mon, May 25
24:00
3.4°C 3.4°C 3.8°C - 100% 0.02kPa
01:00
3.2°C 3.3°C 3.6°C - 100% 0.02kPa
02:00
2.7°C 3.2°C 3.8°C - 100% 0.06kPa
03:00
2.9°C 3.1°C 3.5°C - 100% 0.03kPa
04:00
3°C 3°C 3.4°C - 100% 0.02kPa
05:00
2.8°C 2.9°C 3°C - 100% 0.01kPa
06:00
2.3°C 2.8°C 2.5°C - 100% 0.01kPa
07:00
1.9°C 2.7°C 2°C - 100% 0.01kPa
08:00
1.4°C 2.6°C 1.6°C - 100% 0.01kPa
09:00
1.3°C 2.5°C 1.4°C - 100% 0kPa
10:00
1°C 2.4°C 1.3°C - 94% 0.01kPa
11:00
-0.3°C 3°C 2.1°C - 80% 0.11kPa
12:00
-0.1°C 3.7°C 3.6°C - 93% 0.18kPa
13:00
-0.5°C 4.3°C 4°C - 99% 0.22kPa
14:00
-0.6°C 4.6°C 3.7°C - 88% 0.21kPa
15:00
0.2°C 5°C 3.2°C - 92% 0.15kPa
16:00
1.5°C 5.2°C 2.9°C - 100% 0.07kPa
17:00
1.8°C 5°C 2.5°C - 100% 0.03kPa
18:00
1.2°C 4.7°C 1.7°C - 98% 0.02kPa
19:00
0.3°C 4.6°C 1.6°C - 39% 0.06kPa
20:00
-0.6°C 4.5°C 1.8°C - 22% 0.11kPa
21:00
-0.8°C 4.3°C 2°C - 25% 0.13kPa
22:00
-0.6°C 3.8°C 1.7°C - 21% 0.11kPa
23:00
-0.9°C 3.3°C 1°C - 9% 0.09kPa
Tue, May 26
24:00
-1.3°C 2.9°C 0.44°C - 5% 0.08kPa
01:00
-1.6°C 2.8°C 0.48°C - 80% 0.09kPa
02:00
-2°C 2.8°C 0.62°C - 96% 0.11kPa
03:00
-2.2°C 2.4°C 1.2°C - 98% 0.14kPa
04:00
-2.2°C 2.1°C 1.5°C - 94% 0.16kPa
05:00
-2.2°C 1.9°C 2°C - 67% 0.18kPa
06:00
-2.6°C 1.9°C 2.8°C - 100% 0.24kPa
07:00
-3°C 2°C 3.6°C - 94% 0.3kPa
08:00
-2.9°C 2°C 4°C - 100% 0.32kPa
09:00
-2.4°C 2.6°C 4°C - 100% 0.3kPa
10:00
-2°C 3.5°C 4.6°C - 100% 0.32kPa
11:00
-1.7°C 4.5°C 5.2°C - 100% 0.34kPa
12:00
-1.4°C 5.5°C 5.6°C - 100% 0.36kPa
13:00
-1°C 6.2°C 5.7°C - 91% 0.35kPa
14:00
-0.7°C 7.2°C 6°C - 83% 0.35kPa
15:00
-0.3°C 7.9°C 6.3°C - 75% 0.36kPa
16:00
-0.2°C 8.5°C 6.5°C - 88% 0.37kPa
17:00
-0.2°C 9°C 6.7°C - 100% 0.38kPa
18:00
-0.1°C 9.2°C 6.6°C - 100% 0.37kPa
19:00
0.6°C 9°C 6.3°C - 100% 0.32kPa
20:00
1.6°C 8.7°C 5.5°C - 100% 0.22kPa
21:00
1.5°C 7°C 4.7°C - 84% 0.17kPa
22:00
1.5°C 5.4°C 3.9°C - 69% 0.13kPa
23:00
1.4°C 3.7°C 3.1°C - 54% 0.09kPa
Wed, May 27
24:00
1.5°C 3.9°C 3.2°C - 66% 0.09kPa
01:00
1.6°C 4.1°C 3.4°C - 78% 0.09kPa
02:00
1.7°C 4.3°C 3.6°C - 91% 0.1kPa
03:00
2°C 4.7°C 3.5°C - 94% 0.08kPa
04:00
2.4°C 5.1°C 3.5°C - 97% 0.06kPa
05:00
2.8°C 5.5°C 3.5°C - 100% 0.04kPa
06:00
2.4°C 5.5°C 3.7°C - 100% 0.07kPa
07:00
2°C 5.6°C 3.9°C - 100% 0.1kPa
08:00
1.6°C 5.7°C 4.1°C - 100% 0.14kPa
09:00
1.8°C 5.7°C 3.8°C - 100% 0.11kPa
10:00
2.1°C 5.8°C 3.5°C - 100% 0.08kPa
11:00
2.3°C 5.9°C 3.2°C - 100% 0.05kPa
12:00
2.2°C 5.6°C 2.9°C - 100% 0.04kPa
13:00
2°C 5.3°C 2.6°C - 100% 0.03kPa
14:00
1.9°C 5.1°C 2.4°C - 100% 0.02kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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