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Rule Morning Frost

Morning Frost Forecast for Luosto, Finnish Lapland

Luosto, Lapland, Finland

Old-growth spruce, rounded fell slopes, and views toward Pyhä-Luosto give Luosto graphic snow forms and long layers in low winter light.

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature11.3°C
Dew Point10.6°C (moderate dew point)
Wind Speed3.3m/s (calm conditions)
Cloud Cover90%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (80-hour forecast)

  • Frost Probability100% of hours
  • Wind Speed96% of hours
  • Time Window88% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Finnish Lapland. The requirements and hourly values below show how those signals apply at Luosto.

Explore Morning Frost conditions across Finnish Lapland →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Luosto during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
10
recorded matching windows · 72% average confidence
Most frequent recorded start hour

07:00 local time, shared by 6 of 10 matches recorded in the last 365 days.

Most represented month

February, with 6 of 10 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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80-hour requirements breakdown

When available, the detailed table below covers only the stated 80-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

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/Helsinki
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Tue, Aug 18
07:00✕0%2.7m/s
08:00✕0%3.1m/s
09:00✕0%2.9m/s
10:00✕0%2.9m/s
11:00✕0%3.3m/s
12:00✕0%3.4m/s
13:00✕0%3.6m/s
14:00✕0%3.2m/s
15:00✕0%3.4m/s
16:00✕0%3.5m/s
17:00✕0%3.3m/s
18:00✕0%3.5m/s
19:00✕0%3m/s
20:00✕0%3.3m/s
21:00✕0%2.5m/s
22:00✕0%2.6m/s
23:00✕0%2.5m/s
Wed, Aug 19
24:00✕0%2.2m/s
01:00✕0%2m/s
02:00✕0%2m/s
03:00✕0%2.4m/s
04:00✓0%2.4m/s
05:00✓0%2.3m/s
06:00✓0%2.7m/s
07:00✕0%2.6m/s
08:00✕0%2.9m/s
09:00✕0%3.7m/s
10:00✕0%4.1m/s
11:00✕0%4.3m/s
12:00✕0%4.3m/s
13:00✕0%4.3m/s
14:00✕0%4.2m/s
15:00✕0%4m/s
16:00✕0%4.1m/s
17:00✕0%4m/s
18:00✕0%4m/s
19:00✕0%3.8m/s
20:00✕0%3.4m/s
21:00✕0%3.7m/s
22:00✕0%3.6m/s
23:00✕0%3.9m/s
Thu, Aug 20
24:00✕0%3.7m/s
01:00✕0%3.4m/s
02:00✕0%3.4m/s
03:00✕0%3.7m/s
04:00✓0%4.2m/s
05:00✓0%4.3m/s
06:00✓0%4.4m/s
07:00✕0%4.7m/s
08:00✕0%4.7m/s
09:00✕0%4.6m/s
10:00✕0%4.4m/s
11:00✕0%3.9m/s
12:00✕0%3.7m/s
13:00✕0%3.1m/s
14:00✕0%2.5m/s
15:00✕0%1.6m/s
16:00✕0%1.3m/s
17:00✕0%1.2m/s
18:00✕0%1.4m/s
19:00✕0%1.7m/s
20:00✕0%2.1m/s
21:00✕0%2.1m/s
22:00✕0%2.1m/s
23:00✕0%2.1m/s
Fri, Aug 21
24:00✕0%2.1m/s
01:00✕0%2.2m/s
02:00✕0%2.3m/s
03:00✕0%2.4m/s
04:00✓0%2.4m/s
05:00✓0%2.3m/s
06:00✓0%2.2m/s
07:00✕0%2.8m/s
08:00✕0%3.4m/s
09:00✕0%4.1m/s
10:00✕0%4.1m/s
11:00✕0%4m/s
12:00✕0%4m/s
13:00✕0%3.5m/s
14:00✕0%2.9m/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/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Tue, Aug 18 Sunrise 04:51 Sunset 21:37
17:00
11°C 11°C 12°C - 90% 0.11kPa
18:00
11°C 11°C 13°C - 100% 0.17kPa
19:00
11°C 11°C 13°C - 95% 0.17kPa
20:00
11°C 11°C 13°C - 76% 0.19kPa
21:00
10°C 11°C 12°C - 99% 0.12kPa
22:00 ☾
10°C 11°C 12°C - 88% 0.15kPa
23:00 ☾
9.9°C 11°C 11°C - 47% 0.08kPa
Wed, Aug 19 Sunrise 04:51 Sunset 21:37
24:00 ☾
9.4°C 11°C 10°C - 58% 0.05kPa
01:00 ☾
8.9°C 11°C 9.7°C - 35% 0.06kPa
02:00 ☾
8.6°C 11°C 9.3°C - 100% 0.05kPa
03:00 ☾
9.4°C 11°C 11°C - 98% 0.12kPa
04:00 ☾
9.6°C 11°C 11°C - 100% 0.14kPa
05:00
9.5°C 11°C 11°C - 100% 0.12kPa
06:00
9.5°C 11°C 11°C - 100% 0.13kPa
07:00
9.5°C 11°C 11°C - 100% 0.13kPa
08:00
10°C 11°C 12°C - 100% 0.18kPa
09:00
10°C 11°C 13°C - 100% 0.28kPa
10:00
10°C 11°C 15°C - 100% 0.39kPa
11:00
10°C 11°C 15°C - 100% 0.47kPa
12:00
10°C 11°C 16°C - 100% 0.57kPa
13:00
11°C 12°C 16°C - 100% 0.55kPa
14:00
12°C 12°C 16°C - 100% 0.34kPa
15:00
13°C 12°C 16°C - 100% 0.34kPa
16:00
13°C 12°C 16°C - 100% 0.31kPa
17:00
12°C 12°C 15°C - 100% 0.28kPa
18:00
12°C 12°C 15°C - 100% 0.32kPa
19:00
12°C 13°C 15°C - 100% 0.28kPa
20:00
12°C 13°C 14°C - 100% 0.22kPa
21:00
11°C 12°C 13°C - 100% 0.21kPa
22:00 ☾
11°C 12°C 13°C - 100% 0.17kPa
23:00 ☾
11°C 12°C 13°C - 100% 0.14kPa
Thu, Aug 20 Sunrise 04:55 Sunset 21:33
24:00 ☾
11°C 12°C 12°C - 100% 0.09kPa
01:00 ☾
11°C 12°C 12°C - 100% 0.07kPa
02:00 ☾
11°C 12°C 12°C - 100% 0.06kPa
03:00 ☾
11°C 12°C 12°C - 100% 0.06kPa
04:00 ☾
12°C 12°C 12°C - 100% 0.06kPa
05:00
12°C 12°C 12°C - 100% 0.05kPa
06:00
12°C 12°C 12°C - 100% 0.05kPa
07:00
12°C 12°C 12°C - 100% 0.05kPa
08:00
12°C 12°C 12°C - 100% 0.06kPa
09:00
11°C 12°C 12°C - 100% 0.06kPa
10:00
11°C 12°C 12°C - 100% 0.07kPa
11:00
11°C 12°C 12°C - 100% 0.07kPa
12:00
11°C 12°C 12°C - 100% 0.07kPa
13:00
11°C 12°C 12°C - 100% 0.07kPa
14:00
11°C 12°C 12°C - 100% 0.1kPa
15:00
12°C 12°C 13°C - 100% 0.14kPa
16:00
12°C 12°C 14°C - 100% 0.18kPa
17:00
12°C 12°C 14°C - 90% 0.2kPa
18:00
13°C 12°C 16°C - 75% 0.29kPa
19:00
13°C 12°C 16°C - 66% 0.27kPa
20:00
12°C 12°C 15°C - 89% 0.27kPa
21:00
12°C 12°C 14°C - 97% 0.21kPa
22:00 ☾
11°C 12°C 13°C - 98% 0.14kPa
23:00 ☾
11°C 11°C 12°C - 99% 0.08kPa
Fri, Aug 21 Sunrise 04:59 Sunset 21:29
24:00 ☾
11°C 11°C 11°C - 100% 0.02kPa
01:00 ☾
10°C 11°C 11°C - 99% 0.03kPa
02:00 ☾
10°C 11°C 11°C - 98% 0.04kPa
03:00 ☾
10°C 11°C 11°C - 97% 0.05kPa
04:00 ☾
10°C 11°C 11°C - 91% 0.05kPa
05:00 ☾
10°C 11°C 11°C - 85% 0.05kPa
06:00
10°C 10°C 11°C - 79% 0.05kPa
07:00
11°C 11°C 12°C - 76% 0.13kPa
08:00
11°C 11°C 13°C - 74% 0.22kPa
09:00
11°C 11°C 14°C - 71% 0.32kPa
10:00
10°C 11°C 15°C - 49% 0.4kPa
11:00
9.8°C 11°C 15°C - 27% 0.48kPa
12:00
9.3°C 12°C 15°C - 5% 0.56kPa
13:00
9.1°C 12°C 14°C - 33% 0.41kPa
14:00
8.8°C 12°C 12°C - 61% 0.29kPa
15:00
8.4°C 12°C 11°C - 89% 0.18kPa
16:00
8.1°C 11°C 10°C - 61% 0.14kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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