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Rule Morning Frost

Aysgarth Falls - Morning Frost - Yorkshire Dales

Aysgarth, 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 83% failing

Currently

Real-time conditions
Soil Temperature13.0°C
Dew Point11.8°C (moderate dew point)
Wind Speed4.3m/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 79 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
06:000%2.5m/s
07:000%2.3m/s
08:000%2.5m/s
09:000%2.4m/s
10:000%2.7m/s
11:000%3.1m/s
12:000%3.5m/s
13:000%4.1m/s
14:000%4.3m/s
15:000%4.4m/s
16:000%4.6m/s
17:000%4.3m/s
18:000%2.9m/s
19:000%1.9m/s
20:000%2.1m/s
21:000%2.2m/s
22:000%2.4m/s
23:000%2.4m/s
Mon, May 25
24:000%2.4m/s
01:000%2.4m/s
02:000%2.5m/s
03:000%2.5m/s
04:000%2.5m/s
05:000%2.5m/s
06:000%2.5m/s
07:000%2.3m/s
08:000%2.2m/s
09:000%2.4m/s
10:000%2.6m/s
11:000%2.8m/s
12:000%3.3m/s
13:000%4.3m/s
14:000%4.7m/s
15:000%4.7m/s
16:000%4.6m/s
17:000%3.6m/s
18:000%2.1m/s
19:000%1.3m/s
20:000%1.1m/s
21:000%1.6m/s
22:000%1.6m/s
23:000%1.2m/s
Tue, May 26
24:000%0.96m/s
01:000%1m/s
02:000%0.84m/s
03:000%0.95m/s
04:000%0.89m/s
05:000%0.73m/s
06:000%0.39m/s
07:000%0.69m/s
08:000%1.3m/s
09:000%1.5m/s
10:000%1.6m/s
11:000%1.7m/s
12:000%1.7m/s
13:000%1.8m/s
14:000%1.8m/s
15:000%1.8m/s
16:000%2.7m/s
17:000%3.7m/s
18:000%3.5m/s
19:000%3.4m/s
20:000%2.9m/s
21:000%2.4m/s
22:000%1.9m/s
23:000%1.9m/s
Wed, May 27
24:000%2m/s
01:000%2.1m/s
02:000%2.4m/s
03:000%2.8m/s
04:000%3.1m/s
05:000%3.6m/s
06:000%4.1m/s
07:000%4.5m/s
08:000%4.5m/s
09:000%4.5m/s
10:000%4.5m/s
11:000%4.4m/s
12:000%4.3m/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/London
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, May 24 Sunrise 04:50 Sunset 21:19
14:00
12°C 13°C 19°C - 5% 0.78kPa
15:00
11°C 13°C 19°C - 5% 0.83kPa
16:00
11°C 14°C 19°C - 5% 0.88kPa
17:00
9.2°C 14°C 18°C - 5% 0.91kPa
18:00
8.8°C 14°C 18°C - 5% 0.87kPa
19:00
10°C 14°C 17°C - 5% 0.68kPa
20:00
9.4°C 14°C 15°C - 3% 0.51kPa
21:00
7.2°C 14°C 12°C - 0% 0.4kPa
22:00
5.5°C 13°C 11°C - 0% 0.39kPa
23:00
4.4°C 13°C 11°C - 3% 0.44kPa
Mon, May 25 Sunrise 04:50 Sunset 21:19
24:00
3.4°C 13°C 11°C - 5% 0.49kPa
01:00
2.8°C 13°C 11°C - 1% 0.54kPa
02:00
2.2°C 13°C 11°C - 0% 0.58kPa
03:00
2.1°C 12°C 11°C - 0% 0.61kPa
04:00
1.9°C 12°C 11°C - 0% 0.61kPa
05:00
1.9°C 12°C 11°C - 0% 0.62kPa
06:00
4.5°C 12°C 11°C - 0% 0.51kPa
07:00
7.5°C 12°C 14°C - 0% 0.55kPa
08:00
8.9°C 12°C 16°C - 0% 0.72kPa
09:00
9.4°C 12°C 18°C - 0% 0.88kPa
10:00
10°C 13°C 19°C - 0% 1kPa
11:00
11°C 13°C 21°C - 0% 1.1kPa
12:00
12°C 13°C 21°C - 0% 1.2kPa
13:00
13°C 14°C 22°C - 0% 1.1kPa
14:00
14°C 14°C 22°C - 0% 1.1kPa
15:00
15°C 14°C 23°C - 0% 1.1kPa
16:00
15°C 15°C 23°C - 0% 1kPa
17:00
15°C 15°C 23°C - 0% 1kPa
18:00
15°C 15°C 22°C - 0% 0.98kPa
19:00
16°C 16°C 22°C - 0% 0.79kPa
20:00
16°C 16°C 20°C - 0% 0.6kPa
21:00
13°C 16°C 18°C - 0% 0.46kPa
22:00
12°C 16°C 16°C - 0% 0.43kPa
23:00
12°C 15°C 16°C - 5% 0.42kPa
Tue, May 26 Sunrise 04:49 Sunset 21:21
24:00
12°C 15°C 16°C - 5% 0.38kPa
01:00
12°C 15°C 15°C - 5% 0.37kPa
02:00
11°C 15°C 15°C - 10% 0.38kPa
03:00
11°C 15°C 15°C - 6% 0.37kPa
04:00
11°C 15°C 15°C - 7% 0.38kPa
05:00
11°C 14°C 15°C - 5% 0.38kPa
06:00
12°C 14°C 16°C - 5% 0.4kPa
07:00
13°C 14°C 18°C - 11% 0.5kPa
08:00
14°C 14°C 19°C - 31% 0.55kPa
09:00
15°C 15°C 19°C - 19% 0.59kPa
10:00
15°C 15°C 20°C - 18% 0.66kPa
11:00
16°C 15°C 21°C - 46% 0.71kPa
12:00
17°C 15°C 22°C - 73% 0.71kPa
13:00
17°C 16°C 22°C - 79% 0.65kPa
14:00
17°C 16°C 22°C - 60% 0.64kPa
15:00
17°C 16°C 22°C - 72% 0.63kPa
16:00
17°C 16°C 21°C - 72% 0.53kPa
17:00
17°C 16°C 19°C - 80% 0.34kPa
18:00
15°C 16°C 17°C - 87% 0.23kPa
19:00
14°C 16°C 16°C - 93% 0.2kPa
20:00
12°C 15°C 14°C - 89% 0.2kPa
21:00
9.1°C 14°C 11°C - 84% 0.19kPa
22:00
6.6°C 13°C 9.1°C - 79% 0.19kPa
23:00
6.7°C 13°C 9.4°C - 77% 0.2kPa
Wed, May 27 Sunrise 04:48 Sunset 21:22
24:00
6.7°C 13°C 9.6°C - 76% 0.21kPa
01:00
6.8°C 13°C 9.9°C - 74% 0.23kPa
02:00
7.3°C 12°C 11°C - 63% 0.28kPa
03:00
7.8°C 12°C 12°C - 52% 0.33kPa
04:00
8.3°C 12°C 13°C - 41% 0.39kPa
05:00
9°C 13°C 14°C - 60% 0.45kPa
06:00
9.6°C 13°C 15°C - 80% 0.51kPa
07:00
10°C 13°C 16°C - 100% 0.58kPa
08:00
10°C 13°C 16°C - 98% 0.57kPa
09:00
11°C 13°C 16°C - 96% 0.57kPa
10:00
11°C 14°C 17°C - 93% 0.57kPa
11:00
11°C 14°C 16°C - 86% 0.51kPa
12:00
11°C 14°C 15°C - 79% 0.46kPa
13:00
10°C 14°C 15°C - 72% 0.41kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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