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Rule Morning Frost

Malham Cove - Morning Frost - Yorkshire Dales

Malham, England, United Kingdom

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)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 71% failing

Currently

Real-time conditions
Soil Temperature16.0°C
Dew Point17.1°C (high dew point)
Wind Speed3.6m/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 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
Tue, Jul 7
14:000%7.3m/s
15:000%6.8m/s
16:000%6.4m/s
17:000%5.8m/s
18:000%5.2m/s
19:000%4.9m/s
20:000%3.3m/s
21:000%2.7m/s
22:000%2.6m/s
23:000%2.6m/s
Wed, Jul 8
24:000%2.3m/s
01:000%2.3m/s
02:000%2.2m/s
03:000%2.1m/s
04:000%2.1m/s
05:000%1.9m/s
06:000%1.7m/s
07:000%1.5m/s
08:000%1.8m/s
09:000%2.2m/s
10:000%2.5m/s
11:000%3.4m/s
12:000%3.3m/s
13:000%3.8m/s
14:000%3.8m/s
15:000%3.6m/s
16:000%3.7m/s
17:000%3.2m/s
18:000%2.4m/s
19:000%1.7m/s
20:000%1.3m/s
21:000%1.4m/s
22:000%1.1m/s
23:000%1m/s
Thu, Jul 9
24:000%1.1m/s
01:000%1m/s
02:000%1m/s
03:000%0.98m/s
04:000%1.1m/s
05:000%1.2m/s
06:000%1.2m/s
07:000%1.1m/s
08:000%1.3m/s
09:000%1.9m/s
10:000%2.1m/s
11:000%2.9m/s
12:000%3.3m/s
13:000%3.3m/s
14:000%3.2m/s
15:000%3.5m/s
16:000%3.3m/s
17:000%3m/s
18:000%2.7m/s
19:000%2.1m/s
20:000%1.6m/s
21:000%1.4m/s
22:000%1.3m/s
23:000%1.3m/s
Fri, Jul 10
24:000%1.3m/s
01:000%1.6m/s
02:000%1.7m/s
03:000%1.7m/s
04:000%1.9m/s
05:000%1.8m/s
06:000%1.9m/s
07:000%1.7m/s
08:000%1.5m/s
09:000%1.6m/s
10:000%2m/s
11:000%2.9m/s
12:000%2.6m/s
13:000%2m/s
14:000%1.4m/s
15:000%0.55m/s
16:000%1.2m/s
17:000%1.3m/s
18:000%2.2m/s
19:000%2.1m/s
20:000%2.2m/s
21:000%2.2m/s
22:000%2.3m/s
23:000%2.6m/s
Sat, Jul 11
24:000%2.8m/s
01:000%3.1m/s
02:000%3.3m/s
03:000%3.5m/s
04:000%3.7m/s
05:000%4.2m/s
06:000%4.6m/s
07:000%5.1m/s
08:000%5.1m/s
09:000%5.1m/s
10:000%5.1m/s
11:000%5.7m/s
12:000%6.3m/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
Wed, Jul 8 Sunrise 04:47 Sunset 21:39
15:00
17°C 16°C 23°C - 5% 0.91kPa
16:00
16°C 16°C 23°C - 5% 0.97kPa
17:00
16°C 16°C 23°C - 5% 0.99kPa
18:00
15°C 17°C 22°C - 5% 0.95kPa
19:00
16°C 17°C 22°C - 3% 0.81kPa
20:00
17°C 17°C 21°C - 5% 0.52kPa
21:00
15°C 17°C 18°C - 5% 0.33kPa
22:00
13°C 17°C 16°C - 5% 0.25kPa
23:00
12°C 16°C 15°C - 26% 0.25kPa
Thu, Jul 9 Sunrise 04:47 Sunset 21:39
24:00
12°C 16°C 14°C - 99% 0.25kPa
01:00
11°C 16°C 14°C - 100% 0.26kPa
02:00
11°C 16°C 13°C - 4% 0.26kPa
03:00
10°C 16°C 13°C - 0% 0.26kPa
04:00
9.7°C 15°C 13°C - 0% 0.24kPa
05:00
9.8°C 15°C 12°C - 0% 0.23kPa
06:00
11°C 15°C 13°C - 0% 0.25kPa
07:00
13°C 15°C 16°C - 0% 0.33kPa
08:00
14°C 15°C 17°C - 0% 0.42kPa
09:00
15°C 15°C 19°C - 0% 0.53kPa
10:00
15°C 15°C 20°C - 0% 0.63kPa
11:00
16°C 16°C 21°C - 0% 0.72kPa
12:00
16°C 16°C 22°C - 0% 0.82kPa
13:00
16°C 16°C 23°C - 0% 0.92kPa
14:00
16°C 16°C 23°C - 0% 1kPa
15:00
16°C 17°C 23°C - 0% 1.1kPa
16:00
16°C 17°C 23°C - 4% 1kPa
17:00
16°C 17°C 23°C - 3% 1kPa
18:00
16°C 17°C 22°C - 2% 0.91kPa
19:00
16°C 17°C 22°C - 30% 0.74kPa
20:00
17°C 17°C 20°C - 5% 0.43kPa
21:00
16°C 17°C 18°C - 6% 0.24kPa
22:00
15°C 17°C 16°C - 53% 0.19kPa
23:00
14°C 17°C 16°C - 87% 0.16kPa
Fri, Jul 10 Sunrise 04:48 Sunset 21:38
24:00
15°C 17°C 16°C - 100% 0.14kPa
01:00
15°C 17°C 16°C - 5% 0.13kPa
02:00
15°C 17°C 16°C - 5% 0.14kPa
03:00
14°C 16°C 16°C - 5% 0.15kPa
04:00
14°C 16°C 15°C - 9% 0.16kPa
05:00
13°C 16°C 15°C - 24% 0.17kPa
06:00
14°C 16°C 16°C - 100% 0.22kPa
07:00
15°C 16°C 18°C - 100% 0.32kPa
08:00
15°C 16°C 19°C - 100% 0.53kPa
09:00
15°C 16°C 21°C - 98% 0.73kPa
10:00
15°C 16°C 22°C - 5% 0.94kPa
11:00
15°C 17°C 23°C - 38% 1.1kPa
12:00
16°C 17°C 24°C - 27% 1.3kPa
13:00
15°C 17°C 25°C - 5% 1.5kPa
14:00
16°C 17°C 26°C - 5% 1.7kPa
15:00
15°C 18°C 27°C - 5% 1.9kPa
16:00
15°C 18°C 27°C - 65% 1.9kPa
17:00
16°C 18°C 27°C - 25% 1.9kPa
18:00
18°C 19°C 27°C - 48% 1.5kPa
19:00
19°C 19°C 26°C - 6% 1.1kPa
20:00
18°C 19°C 22°C - 37% 0.64kPa
21:00
15°C 18°C 18°C - 69% 0.32kPa
22:00
13°C 18°C 14°C - 100% 0.1kPa
23:00
14°C 18°C 14°C - 98% 0.1kPa
Sat, Jul 11 Sunrise 04:49 Sunset 21:37
24:00
14°C 18°C 15°C - 95% 0.1kPa
01:00
14°C 17°C 15°C - 92% 0.1kPa
02:00
15°C 17°C 16°C - 95% 0.15kPa
03:00
15°C 17°C 17°C - 98% 0.21kPa
04:00
15°C 17°C 17°C - 100% 0.28kPa
05:00
15°C 17°C 18°C - 100% 0.42kPa
06:00
15°C 18°C 20°C - 100% 0.58kPa
07:00
15°C 18°C 21°C - 100% 0.77kPa
08:00
15°C 18°C 21°C - 96% 0.79kPa
09:00
15°C 18°C 21°C - 93% 0.8kPa
10:00
15°C 18°C 21°C - 89% 0.82kPa
11:00
15°C 18°C 20°C - 91% 0.63kPa
12:00
14°C 18°C 18°C - 93% 0.47kPa
13:00
14°C 18°C 17°C - 95% 0.33kPa
14:00
13°C 18°C 16°C - 97% 0.25kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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