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Rule Morning Frost

Porjus - Morning Frost - Swedish Lapland

Porjus, 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 100% failing
Wind Speed 82% failing

Currently

Real-time conditions
Soil Temperature10.2°C
Dew Point8.3°C (moderate dew point)
Wind Speed2.6m/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 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
Tue, Jul 7
16:00-1.2%2.3m/s
17:00-1.2%2.2m/s
18:00-1.8%1.6m/s
19:00-1.8%1.2m/s
20:00-1.8%1.2m/s
21:00-1.4%1.2m/s
22:00-1.5%1.1m/s
23:00-2.5%0.89m/s
Wed, Jul 8
24:00-2.5%0.89m/s
01:00-2.1%0.99m/s
02:00-1.4%1.4m/s
03:00-2.3%2.1m/s
04:00-1.3%2.2m/s
05:00-1.2%2.6m/s
06:00-1.4%2.9m/s
07:00-1.8%3.1m/s
08:00-3.1%3.7m/s
09:00-3.2%3.5m/s
10:00-0%4.1m/s
11:00-0%4.4m/s
12:00-0%4.2m/s
13:00-0%3.8m/s
14:00-0%3.4m/s
15:00-0%2.7m/s
16:00-0%2.6m/s
17:00-0%2.2m/s
18:00-0%3.2m/s
19:00-0%3.3m/s
20:00-0%3.2m/s
21:00-0%3m/s
22:00-0%2.7m/s
23:00-0%2.6m/s
Thu, Jul 9
24:00-0%2.4m/s
01:00-0%2m/s
02:00-0%2m/s
03:00-0%2m/s
04:00-0%1.9m/s
05:00-0%1.6m/s
06:00-0%2m/s
07:00-0%2.1m/s
08:00-0%1.9m/s
09:00-0%1.4m/s
10:00-0%0.49m/s
11:00-0%0.05m/s
12:00-0%0.5m/s
13:00-0%0.89m/s
14:00-0%1m/s
15:00-0%0.95m/s
16:00-0%1.7m/s
17:00-0%2m/s
18:00-0%1.8m/s
19:00-0%2.1m/s
20:00-0%2.1m/s
21:00-0%2.1m/s
22:00-0%1.9m/s
23:00-0%2m/s
Fri, Jul 10
24:00-0%1.9m/s
01:00-0%1.8m/s
02:00-0%1.9m/s
03:00-0%1.7m/s
04:00-0%1.5m/s
05:00-0%1.6m/s
06:00-0%1.5m/s
07:00-0%1.4m/s
08:00-0%1.3m/s
09:00-0%1.5m/s
10:00-0%1.9m/s
11:00-0%2.4m/s
12:00-0%2.9m/s
13:00-0%3.2m/s
14:00-0%2.8m/s
15:00-0%1.6m/s
16:00-0%0.91m/s
17:00-0%1.4m/s
18:00-0%1.9m/s
19:00-0%2.2m/s
20:00-0%3.1m/s
21:00-0%2.6m/s
22:00-0%2.1m/s
23:00-0%1.6m/s
Sat, Jul 11
24:00-0%2m/s
01:00-0%2.4m/s
02:00-0%2.8m/s
03:00-0%3.1m/s
04:00-0%3.3m/s
05:00-0%3.6m/s
06:00-0%3.5m/s
07:00-0%3.4m/s
08:00-0%3.4m/s
09:00-0%2.7m/s
10:00-0%2.1m/s
11:00-0%1.5m/s
12:00-0%2.1m/s
13:00-0%2.8m/s
14:00-0%3.5m/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
Wed, Jul 8
16:00
8.3°C 10°C 16°C - 100% 0.69kPa
17:00
8.3°C 10°C 14°C - 100% 0.51kPa
18:00
7.3°C 10°C 14°C - 100% 0.58kPa
19:00
6.6°C 11°C 14°C - 100% 0.62kPa
20:00
6.6°C 11°C 14°C - 100% 0.6kPa
21:00
6.6°C 11°C 13°C - 100% 0.55kPa
22:00
6.1°C 11°C 13°C - 100% 0.52kPa
23:00
5.8°C 11°C 12°C - 100% 0.48kPa
Thu, Jul 9
24:00
5.5°C 11°C 12°C - 100% 0.46kPa
01:00
5.5°C 11°C 11°C - 100% 0.41kPa
02:00
5.6°C 11°C 10°C - 53% 0.35kPa
03:00
5.3°C 10°C 8.8°C - 5% 0.24kPa
04:00
5.6°C 10°C 8.7°C - 5% 0.22kPa
05:00
6.2°C 10°C 10°C - 5% 0.29kPa
06:00
6.3°C 10°C 12°C - 43% 0.42kPa
07:00
6.2°C 10°C 13°C - 43% 0.55kPa
08:00
6°C 11°C 14°C - 47% 0.68kPa
09:00
6°C 11°C 15°C - 20% 0.82kPa
10:00
6.3°C 11°C 17°C - 26% 0.99kPa
11:00
6.6°C 12°C 18°C - 91% 1.1kPa
12:00
6.2°C 12°C 18°C - 100% 1.1kPa
13:00
5.8°C 13°C 17°C - 100% 1kPa
14:00
6.7°C 13°C 17°C - 100% 0.89kPa
15:00
7°C 13°C 16°C - 100% 0.85kPa
16:00
7.7°C 13°C 16°C - 98% 0.78kPa
17:00
7.6°C 13°C 17°C - 50% 0.87kPa
18:00
7.5°C 13°C 17°C - 82% 0.96kPa
19:00
7.9°C 14°C 17°C - 100% 0.89kPa
20:00
9.4°C 14°C 16°C - 100% 0.66kPa
21:00
9.9°C 14°C 15°C - 100% 0.48kPa
22:00
9.9°C 14°C 14°C - 95% 0.38kPa
23:00
9.6°C 13°C 13°C - 100% 0.3kPa
Fri, Jul 10
24:00
9.5°C 13°C 12°C - 100% 0.24kPa
01:00
9.8°C 13°C 13°C - 100% 0.27kPa
02:00
10°C 13°C 13°C - 100% 0.24kPa
03:00
10°C 13°C 13°C - 100% 0.23kPa
04:00
9.9°C 13°C 13°C - 100% 0.24kPa
05:00
9.7°C 13°C 13°C - 100% 0.27kPa
06:00
9.9°C 13°C 14°C - 92% 0.35kPa
07:00
9.7°C 13°C 14°C - 100% 0.42kPa
08:00
9.9°C 13°C 14°C - 100% 0.34kPa
09:00
10°C 13°C 14°C - 78% 0.36kPa
10:00
9.3°C 13°C 18°C - 29% 0.87kPa
11:00
9.5°C 13°C 19°C - 35% 1kPa
12:00
9.5°C 14°C 20°C - 69% 1.2kPa
13:00
9.8°C 14°C 21°C - 87% 1.3kPa
14:00
11°C 14°C 20°C - 100% 1kPa
15:00
11°C 14°C 18°C - 98% 0.77kPa
16:00
11°C 15°C 19°C - 81% 0.82kPa
17:00
11°C 15°C 21°C - 68% 1.1kPa
18:00
11°C 15°C 21°C - 79% 1.2kPa
19:00
12°C 15°C 21°C - 99% 1.1kPa
20:00
12°C 16°C 19°C - 100% 0.79kPa
21:00
12°C 15°C 18°C - 72% 0.65kPa
22:00
11°C 15°C 16°C - 43% 0.52kPa
23:00
11°C 14°C 15°C - 15% 0.41kPa
Sat, Jul 11
24:00
11°C 15°C 16°C - 43% 0.51kPa
01:00
11°C 15°C 17°C - 72% 0.63kPa
02:00
11°C 15°C 18°C - 100% 0.75kPa
03:00
11°C 15°C 19°C - 100% 0.83kPa
04:00
11°C 15°C 19°C - 100% 0.91kPa
05:00
11°C 15°C 20°C - 100% 0.99kPa
06:00
11°C 16°C 21°C - 100% 1.1kPa
07:00
11°C 16°C 22°C - 100% 1.3kPa
08:00
10°C 16°C 23°C - 100% 1.5kPa
09:00
11°C 16°C 22°C - 100% 1.3kPa
10:00
12°C 17°C 21°C - 100% 1.1kPa
11:00
12°C 17°C 20°C - 100% 0.96kPa
12:00
12°C 17°C 18°C - 100% 0.75kPa
13:00
11°C 17°C 17°C - 100% 0.56kPa
14:00
11°C 16°C 15°C - 100% 0.41kPa
15:00
11°C 16°C 14°C - 100% 0.34kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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