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Rule Morning Frost

Morning Frost Forecast for Ribblehead Viaduct, Yorkshire Dales

Ribblehead, England, United Kingdom

Twenty-four stone arches carry the railway across open moorland beneath Whernside, creating rhythm, scale and a strong horizontal.

Currently

Real-time conditions
Soil Temperature12.6°C
Dew Point9.2°C (moderate dew point)
Wind Speed6.2m/s (moderate winds)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

  • Frost Probability100% of hours
  • Wind Speed97% of hours
  • Time Window83% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Yorkshire Dales. The requirements and hourly values below show how those signals apply at Ribblehead Viaduct.

Explore Morning Frost conditions across Yorkshire Dales →

Recorded match history

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

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
0
recorded matching windows

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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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-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 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sun, Sep 6
23:000%4m/s
Mon, Sep 7
24:000%4.5m/s
01:000%4.4m/s
02:000%4.9m/s
03:000%5.6m/s
04:000%5.4m/s
05:000%5.8m/s
06:000%4m/s
07:000%4.7m/s
08:000%5.6m/s
09:000%5.9m/s
10:000%5.8m/s
11:000%7.1m/s
12:000%7.5m/s
13:000%8.5m/s
14:000%8.7m/s
15:000%8.4m/s
16:000%8.4m/s
17:000%8m/s
18:000%7.7m/s
19:000%8m/s
20:000%7.7m/s
21:000%6.7m/s
22:000%4.9m/s
23:000%6.2m/s
Tue, Sep 8
24:000%6.6m/s
01:000%7.2m/s
02:000%7.8m/s
03:000%7.9m/s
04:000%8.3m/s
05:000%7.5m/s
06:000%7.3m/s
07:000%6.8m/s
08:000%7.3m/s
09:000%7.4m/s
10:000%8.1m/s
11:000%8.8m/s
12:000%8.9m/s
13:000%8.5m/s
14:000%8.9m/s
15:000%9.4m/s
16:000%9.8m/s
17:000%10m/s
18:000%9.9m/s
19:000%9.7m/s
20:000%9.2m/s
21:000%8.5m/s
22:000%7.9m/s
23:000%7.3m/s
Wed, Sep 9
24:000%6.3m/s
01:000%5.5m/s
02:000%4.9m/s
03:000%4.9m/s
04:000%5m/s
05:000%3.5m/s
06:000%1.6m/s
07:000%1.3m/s
08:000%1.3m/s
09:000%3.7m/s
10:000%4.8m/s
11:000%5m/s
12:000%4.9m/s
13:000%4.9m/s
14:000%5.1m/s
15:000%4.9m/s
16:000%6.1m/s
17:000%5.6m/s
18:000%4.1m/s
19:000%3.4m/s
20:000%2.4m/s
21:000%2.1m/s
22:000%1.8m/s
23:000%2.2m/s
Thu, Sep 10
24:000%2.3m/s
01:000%2.4m/s
02:000%2.5m/s
03:000%2.8m/s
04:000%2.9m/s
05:000%3m/s
06:000%2.7m/s
07:000%2.6m/s
08:000%3.8m/s
09:000%5.1m/s
10:000%6.3m/s
11:000%5.2m/s
12:000%4.1m/s
13:000%3m/s
14:000%3.4m/s
15:000%3.8m/s
16:000%4.1m/s
17:000%4m/s
18:000%3.9m/s
19:000%3.8m/s
20:000%3.7m/s
21:000%3.7m/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/London
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Mon, Sep 7 Sunrise 06:28 Sunset 19:45
23:00
9.2°C 13°C 9.6°C - 100% 0.03kPa
Tue, Sep 8 Sunrise 06:28 Sunset 19:45
24:00
8.7°C 12°C 9.1°C - 100% 0.03kPa
01:00
8.7°C 12°C 9°C - 100% 0.02kPa
02:00
8.4°C 12°C 8.8°C - 100% 0.03kPa
03:00
8.2°C 12°C 8.8°C - 96% 0.05kPa
04:00
8°C 12°C 8.8°C - 100% 0.06kPa
05:00
7.8°C 12°C 8.5°C - 100% 0.06kPa
06:00
7.6°C 12°C 8.5°C - 100% 0.07kPa
07:00
7.5°C 11°C 8.3°C - 100% 0.06kPa
08:00
8.2°C 11°C 9.1°C - 100% 0.06kPa
09:00
8.1°C 11°C 9.3°C - 39% 0.09kPa
10:00
8.6°C 11°C 10°C - 98% 0.13kPa
11:00
8.6°C 11°C 10°C - 84% 0.15kPa
12:00
8.9°C 11°C 11°C - 100% 0.15kPa
13:00
9°C 11°C 10°C - 100% 0.11kPa
14:00
8.7°C 11°C 10°C - 67% 0.11kPa
15:00
8.8°C 11°C 11°C - 4% 0.18kPa
16:00
8.9°C 11°C 11°C - 28% 0.21kPa
17:00
9.2°C 11°C 11°C - 81% 0.14kPa
18:00
8.9°C 11°C 10°C - 60% 0.11kPa
19:00
8.7°C 11°C 9.9°C - 99% 0.09kPa
20:00
8.1°C 11°C 9.6°C - 100% 0.12kPa
21:00
7.7°C 11°C 9.4°C - 100% 0.13kPa
22:00
7.5°C 11°C 9.6°C - 100% 0.16kPa
23:00
7.5°C 11°C 9.4°C - 75% 0.14kPa
Wed, Sep 9 Sunrise 06:30 Sunset 19:43
24:00
7.3°C 11°C 9°C - 51% 0.12kPa
01:00
6.9°C 11°C 8.5°C - 35% 0.11kPa
02:00
6.4°C 10°C 7.5°C - 35% 0.08kPa
03:00
5.9°C 10°C 7.3°C - 37% 0.1kPa
04:00
5.5°C 10°C 6.6°C - 43% 0.08kPa
05:00
5.2°C 10°C 6.1°C - 11% 0.06kPa
06:00
4°C 9.9°C 4.9°C - 0% 0.05kPa
07:00
3.8°C 9.6°C 4.7°C - 0% 0.05kPa
08:00
5.1°C 9.5°C 6.6°C - 0% 0.09kPa
09:00
5°C 9.5°C 8.4°C - 0% 0.23kPa
10:00
4.4°C 9.5°C 9.5°C - 0% 0.35kPa
11:00
4.1°C 9.6°C 11°C - 0% 0.46kPa
12:00
4.4°C 9.7°C 12°C - 0% 0.55kPa
13:00
5.5°C 9.9°C 13°C - 0% 0.58kPa
14:00
6.6°C 10°C 14°C - 5% 0.58kPa
15:00
7.5°C 10°C 14°C - 24% 0.55kPa
16:00
8.2°C 10°C 13°C - 95% 0.43kPa
17:00
8.1°C 11°C 11°C - 88% 0.27kPa
18:00
8°C 11°C 11°C - 100% 0.26kPa
19:00
7.8°C 11°C 9.9°C - 98% 0.16kPa
20:00
6.7°C 10°C 7.9°C - 96% 0.09kPa
21:00
5.8°C 10°C 7.3°C - 100% 0.1kPa
22:00
5.6°C 10°C 7.8°C - 100% 0.15kPa
23:00
5.9°C 10°C 7.5°C - 100% 0.11kPa
Thu, Sep 10 Sunrise 06:31 Sunset 19:40
24:00
7.1°C 9.9°C 8.8°C - 100% 0.13kPa
01:00
7.5°C 9.9°C 8.4°C - 100% 0.07kPa
02:00
7.6°C 9.8°C 8.2°C - 100% 0.05kPa
03:00
8°C 9.7°C 8.7°C - 100% 0.06kPa
04:00
7.6°C 9.6°C 8.3°C - 100% 0.04kPa
05:00
7.4°C 9.6°C 8.2°C - 100% 0.05kPa
06:00
6.9°C 9.5°C 7.5°C - 100% 0.04kPa
07:00
6.7°C 9.4°C 7.3°C - 100% 0.04kPa
08:00
8.2°C 10°C 10°C - 100% 0.15kPa
09:00
9.4°C 11°C 13°C - 100% 0.3kPa
10:00
11°C 12°C 16°C - 100% 0.51kPa
11:00
11°C 12°C 15°C - 100% 0.39kPa
12:00
11°C 12°C 14°C - 100% 0.28kPa
13:00
11°C 12°C 13°C - 100% 0.18kPa
14:00
11°C 12°C 13°C - 100% 0.14kPa
15:00
11°C 12°C 12°C - 100% 0.1kPa
16:00
12°C 12°C 12°C - 100% 0.06kPa
17:00
12°C 12°C 13°C - 100% 0.05kPa
18:00
12°C 12°C 13°C - 100% 0.04kPa
19:00
13°C 12°C 13°C - 99% 0.03kPa
20:00
13°C 12°C 13°C - 99% 0.04kPa
21:00
13°C 12°C 13°C - 99% 0.05kPa
22:00
13°C 12°C 14°C - 99% 0.06kPa
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.

Forecast generated

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