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Rule Morning Frost

Bolton Abbey - Morning Frost - Yorkshire Dales

Bolton Abbey, England, United Kingdom

Frost crystals on calm, cold mornings near sunrise

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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)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 57% failing

Currently

Real-time conditions
Soil Temperature12.8°C
Dew Point11.8°C (moderate dew point)
Wind Speed3.9m/s (calm conditions)
Cloud Cover5%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

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 identifies when freezing conditions create photogenic frost patterns across the Yorkshire Dales' distinctive limestone landscape. We track overnight temperatures, humidity, clear skies, and wind conditions to predict when hoar frost transforms waterfalls, stone walls, and limestone formations.

The Dales' elevation and northern position mean frost conditions are common from November through March. Freezing temperatures transform the region's numerous waterfalls into ice sculptures, while hoar frost decorates limestone pavements and thousands of miles of dry-stone walls with intricate crystal patterns.

What makes Yorkshire Dales frost photography special:

  • Frozen waterfalls - Aysgarth Falls and Hardraw Force develop dramatic ice formations in extended freezes
  • Limestone patterns - Hoar frost accentuates the geometric clints and grikes of limestone pavements
  • Stone wall networks - Miles of traditional walls become white geometric patterns across frozen hillsides
  • Historic barns - Field barns and traditional stone buildings gain fairy-tale quality under heavy frost

Aysgarth Falls' triple cascades develop stunning ice formations during prolonged freezes, with water still flowing beneath frozen edges. Hardraw Force—England's highest single-drop waterfall—creates an amphitheater of ice when temperatures stay below freezing for days. The limestone pavement at Malham becomes even more geometric under hoar frost, with ice crystals following the rock's natural patterns. Traditional field barns scattered across high pastures gain storybook quality when frost-covered under blue winter skies. Bolton Abbey's medieval priory ruins take on Gothic atmosphere when frost-covered. Stone walls create endless compositional opportunities—their geometric patterns emphasized by frost against dark winter grass. Dawn light is crucial—arrive early to catch low sun illuminating frost crystals before they melt. Cold, clear nights with high pressure produce the heaviest frost.

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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/London
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sun, May 24
05:000%1.6m/s
06:000%1.6m/s
07:000%1.5m/s
08:000%1.8m/s
09:000%2.3m/s
10:000%2.7m/s
11:000%3m/s
12:000%3.3m/s
13:000%3.7m/s
14:000%3.9m/s
15:000%4.1m/s
16:000%4m/s
17:000%3.5m/s
18:000%2.9m/s
19:000%1.7m/s
20:000%1.4m/s
21:000%1.4m/s
22:000%1.3m/s
23:000%1.3m/s
Mon, May 25
24:000%1.2m/s
01:000%1.2m/s
02:000%1.2m/s
03:000%1.2m/s
04:000%1.3m/s
05:000%1.2m/s
06:000%1.1m/s
07:000%1.1m/s
08:000%1.4m/s
09:000%1.7m/s
10:000%2m/s
11:000%2.4m/s
12:000%2.8m/s
13:000%3.4m/s
14:000%3.8m/s
15:000%3.8m/s
16:000%3.6m/s
17:000%2.8m/s
18:000%1.8m/s
19:000%1.4m/s
20:000%1.5m/s
21:000%1.6m/s
22:000%1.1m/s
23:000%0.51m/s
Tue, May 26
24:000%0.23m/s
01:000%0.58m/s
02:000%0.85m/s
03:000%0.84m/s
04:000%0.82m/s
05:000%0.61m/s
06:000%0.33m/s
07:000%0.36m/s
08:000%0.78m/s
09:000%1.1m/s
10:000%1.4m/s
11:000%1.6m/s
12:000%1.5m/s
13:000%1.4m/s
14:000%1.3m/s
15:000%1.4m/s
16:000%1.9m/s
17:000%4.1m/s
18:000%5.3m/s
19:000%4.2m/s
20:000%3.9m/s
21:000%3.6m/s
22:000%3.3m/s
23:000%3.2m/s
Wed, May 27
24:000%3.1m/s
01:000%3m/s
02:000%3m/s
03:000%3.1m/s
04:000%3.1m/s
05:000%3.6m/s
06:000%4.1m/s
07:000%4.7m/s
08:000%4.7m/s
09:000%4.8m/s
10:000%4.9m/s
11:000%4.7m/s
12:000%4.4m/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
Sun, May 24 Sunrise 04:51 Sunset 21:17
14:00
12°C 13°C 19°C - 5% 0.84kPa
15:00
12°C 13°C 19°C - 5% 0.9kPa
16:00
11°C 13°C 20°C - 5% 0.94kPa
17:00
11°C 14°C 19°C - 5% 0.93kPa
18:00
11°C 14°C 19°C - 5% 0.84kPa
19:00
13°C 14°C 18°C - 5% 0.62kPa
20:00
11°C 14°C 16°C - 4% 0.48kPa
21:00
8.9°C 14°C 13°C - 0% 0.38kPa
22:00
8.2°C 14°C 12°C - 0% 0.32kPa
23:00
7.3°C 13°C 12°C - 1% 0.33kPa
Mon, May 25 Sunrise 04:51 Sunset 21:17
24:00
6.5°C 13°C 11°C - 1% 0.38kPa
01:00
5.8°C 13°C 11°C - 0% 0.4kPa
02:00
5.2°C 13°C 11°C - 0% 0.44kPa
03:00
4.7°C 12°C 11°C - 0% 0.45kPa
04:00
4.4°C 12°C 11°C - 0% 0.47kPa
05:00
4.1°C 12°C 11°C - 0% 0.47kPa
06:00
5.8°C 12°C 12°C - 0% 0.46kPa
07:00
8.4°C 12°C 15°C - 0% 0.55kPa
08:00
9.4°C 12°C 16°C - 0% 0.67kPa
09:00
11°C 12°C 18°C - 0% 0.75kPa
10:00
12°C 13°C 20°C - 0% 0.85kPa
11:00
13°C 13°C 21°C - 0% 1kPa
12:00
14°C 13°C 22°C - 0% 1.1kPa
13:00
14°C 14°C 23°C - 0% 1.2kPa
14:00
15°C 14°C 24°C - 0% 1.2kPa
15:00
16°C 15°C 24°C - 0% 1.2kPa
16:00
16°C 15°C 24°C - 0% 1.2kPa
17:00
16°C 16°C 24°C - 0% 1.2kPa
18:00
17°C 16°C 24°C - 0% 1.1kPa
19:00
18°C 16°C 24°C - 0% 0.81kPa
20:00
18°C 16°C 21°C - 0% 0.53kPa
21:00
16°C 16°C 18°C - 0% 0.27kPa
22:00
15°C 16°C 17°C - 0% 0.23kPa
23:00
14°C 16°C 17°C - 2% 0.28kPa
Tue, May 26 Sunrise 04:50 Sunset 21:19
24:00
14°C 16°C 16°C - 1% 0.28kPa
01:00
14°C 16°C 16°C - 3% 0.27kPa
02:00
14°C 15°C 16°C - 5% 0.27kPa
03:00
13°C 15°C 16°C - 5% 0.27kPa
04:00
13°C 15°C 15°C - 8% 0.27kPa
05:00
13°C 15°C 15°C - 3% 0.26kPa
06:00
13°C 15°C 16°C - 1% 0.3kPa
07:00
15°C 15°C 18°C - 3% 0.39kPa
08:00
16°C 15°C 19°C - 3% 0.47kPa
09:00
17°C 15°C 21°C - 5% 0.54kPa
10:00
17°C 16°C 22°C - 10% 0.64kPa
11:00
18°C 16°C 23°C - 45% 0.74kPa
12:00
18°C 16°C 23°C - 34% 0.76kPa
13:00
18°C 17°C 23°C - 82% 0.8kPa
14:00
18°C 17°C 23°C - 61% 0.82kPa
15:00
18°C 17°C 23°C - 92% 0.8kPa
16:00
18°C 18°C 23°C - 79% 0.73kPa
17:00
18°C 18°C 22°C - 86% 0.52kPa
18:00
18°C 18°C 19°C - 91% 0.21kPa
19:00
16°C 18°C 17°C - 99% 0.13kPa
20:00
13°C 17°C 15°C - 99% 0.19kPa
21:00
9.8°C 16°C 12°C - 100% 0.23kPa
22:00
6.7°C 15°C 10°C - 100% 0.26kPa
23:00
6.7°C 14°C 10°C - 100% 0.27kPa
Wed, May 27 Sunrise 04:49 Sunset 21:20
24:00
6.7°C 14°C 10°C - 100% 0.29kPa
01:00
6.7°C 14°C 11°C - 100% 0.3kPa
02:00
6.8°C 14°C 11°C - 96% 0.32kPa
03:00
6.9°C 14°C 11°C - 92% 0.35kPa
04:00
7°C 14°C 12°C - 89% 0.37kPa
05:00
7.6°C 14°C 13°C - 92% 0.42kPa
06:00
8.1°C 14°C 14°C - 96% 0.47kPa
07:00
8.6°C 13°C 14°C - 100% 0.52kPa
08:00
8.9°C 14°C 15°C - 98% 0.54kPa
09:00
9.2°C 14°C 15°C - 97% 0.56kPa
10:00
9.4°C 14°C 16°C - 96% 0.58kPa
11:00
9.3°C 14°C 15°C - 89% 0.54kPa
12:00
9.2°C 14°C 15°C - 83% 0.5kPa
13:00
9.1°C 14°C 14°C - 77% 0.47kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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