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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

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 88% failing

Currently

Real-time conditions
Soil Temperature16.8°C
Dew Point17.3°C (high dew point)
Wind Speed4.2m/s (calm conditions)
Cloud Cover4%

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%8.8m/s
15:000%7.8m/s
16:000%7.5m/s
17:000%6.6m/s
18:000%5.6m/s
19:000%5.4m/s
20:000%4.6m/s
21:000%3.8m/s
22:000%3.1m/s
23:000%3m/s
Wed, Jul 8
24:000%2.8m/s
01:000%2.9m/s
02:000%2.8m/s
03:000%2.8m/s
04:000%2.8m/s
05:000%2.5m/s
06:000%2.2m/s
07:000%2m/s
08:000%2.2m/s
09:000%2.3m/s
10:000%2.7m/s
11:000%3.4m/s
12:000%3.7m/s
13:000%4.2m/s
14:000%4.5m/s
15:000%4.2m/s
16:000%4.3m/s
17:000%4.1m/s
18:000%3.2m/s
19:000%2.2m/s
20:000%1.4m/s
21:000%1.7m/s
22:000%1.7m/s
23:000%1.4m/s
Thu, Jul 9
24:000%1.4m/s
01:000%1.5m/s
02:000%1.7m/s
03:000%1.9m/s
04:000%1.9m/s
05:000%2m/s
06:000%1.8m/s
07:000%1.7m/s
08:000%1.8m/s
09:000%2.1m/s
10:000%2.6m/s
11:000%3.1m/s
12:000%3.6m/s
13:000%3.6m/s
14:000%3.6m/s
15:000%3.7m/s
16:000%3.9m/s
17:000%3.6m/s
18:000%3.2m/s
19:000%2.6m/s
20:000%1.6m/s
21:000%1.6m/s
22:000%1.5m/s
23:000%1.3m/s
Fri, Jul 10
24:000%1.2m/s
01:000%1.4m/s
02:000%1.7m/s
03:000%1.6m/s
04:000%1.8m/s
05:000%1.7m/s
06:000%1.7m/s
07:000%1.6m/s
08:000%1.7m/s
09:000%1.8m/s
10:000%2.4m/s
11:000%2.8m/s
12:000%2.8m/s
13:000%1.8m/s
14:000%0.92m/s
15:000%0.39m/s
16:000%1.8m/s
17:000%2.1m/s
18:000%2.9m/s
19:000%3.5m/s
20:000%3.1m/s
21:000%2.7m/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 04:46 Sunset 21:37
15:00
17°C 17°C 24°C - 4% 1.1kPa
16:00
17°C 17°C 24°C - 5% 1.1kPa
17:00
16°C 17°C 24°C - 5% 1.1kPa
18:00
15°C 18°C 23°C - 5% 1.1kPa
19:00
16°C 18°C 23°C - 0% 0.97kPa
20:00
17°C 18°C 21°C - 5% 0.64kPa
21:00
15°C 18°C 18°C - 5% 0.41kPa
22:00
14°C 17°C 16°C - 5% 0.26kPa
23:00
13°C 17°C 15°C - 98% 0.24kPa
Thu, Jul 9 Sunrise 04:46 Sunset 21:37
24:00
13°C 17°C 15°C - 100% 0.24kPa
01:00
12°C 17°C 15°C - 97% 0.24kPa
02:00
12°C 17°C 14°C - 2% 0.25kPa
03:00
11°C 16°C 13°C - 0% 0.26kPa
04:00
9.9°C 16°C 13°C - 0% 0.26kPa
05:00
9.8°C 16°C 12°C - 0% 0.24kPa
06:00
11°C 16°C 14°C - 0% 0.27kPa
07:00
12°C 16°C 16°C - 0% 0.38kPa
08:00
13°C 16°C 18°C - 0% 0.54kPa
09:00
14°C 16°C 20°C - 0% 0.67kPa
10:00
15°C 16°C 21°C - 0% 0.81kPa
11:00
16°C 16°C 22°C - 0% 0.94kPa
12:00
16°C 17°C 23°C - 0% 1kPa
13:00
16°C 17°C 24°C - 0% 1.1kPa
14:00
16°C 17°C 24°C - 0% 1.3kPa
15:00
15°C 18°C 24°C - 0% 1.3kPa
16:00
15°C 18°C 24°C - 4% 1.3kPa
17:00
15°C 18°C 24°C - 9% 1.3kPa
18:00
15°C 18°C 23°C - 2% 1.1kPa
19:00
16°C 18°C 22°C - 44% 0.9kPa
20:00
17°C 18°C 21°C - 33% 0.56kPa
21:00
16°C 18°C 18°C - 5% 0.33kPa
22:00
15°C 18°C 17°C - 64% 0.21kPa
23:00
15°C 18°C 16°C - 80% 0.18kPa
Fri, Jul 10 Sunrise 04:47 Sunset 21:37
24:00
15°C 18°C 16°C - 73% 0.17kPa
01:00
15°C 18°C 16°C - 62% 0.17kPa
02:00
14°C 17°C 16°C - 5% 0.17kPa
03:00
14°C 17°C 15°C - 5% 0.18kPa
04:00
13°C 17°C 15°C - 5% 0.19kPa
05:00
13°C 17°C 15°C - 37% 0.2kPa
06:00
13°C 17°C 16°C - 44% 0.26kPa
07:00
14°C 17°C 18°C - 100% 0.39kPa
08:00
15°C 17°C 19°C - 100% 0.61kPa
09:00
14°C 17°C 21°C - 96% 0.83kPa
10:00
14°C 17°C 22°C - 16% 1kPa
11:00
14°C 17°C 24°C - 8% 1.3kPa
12:00
14°C 17°C 25°C - 35% 1.5kPa
13:00
14°C 18°C 26°C - 11% 1.8kPa
14:00
15°C 18°C 27°C - 5% 2kPa
15:00
14°C 19°C 28°C - 5% 2.2kPa
16:00
14°C 19°C 28°C - 35% 2.2kPa
17:00
14°C 19°C 28°C - 53% 2.2kPa
18:00
16°C 20°C 27°C - 68% 1.8kPa
19:00
17°C 20°C 26°C - 26% 1.3kPa
20:00
16°C 19°C 22°C - 51% 0.74kPa
21:00
15°C 19°C 18°C - 75% 0.36kPa
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 04:48 Sunset 21:36
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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