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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
Wind Speed 94% failing
Time Window 88% failing

Currently

Real-time conditions
Soil Temperature7.1°C
Dew Point7.7°C (moderate dew point)
Wind Speed1.8m/s (calm conditions)
Cloud Cover100%

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 86 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, Apr 14
05:0034%0.89m/s
06:0034%1.1m/s
07:0034%1.1m/s
08:0037%1.5m/s
09:0048%2m/s
10:0037%2.7m/s
11:0037%3.6m/s
12:0046%4.3m/s
13:003%5m/s
14:002.2%3.7m/s
15:001.5%4.6m/s
16:001.5%4.3m/s
17:001.7%3.2m/s
18:001.7%3.3m/s
19:001.2%2.6m/s
20:001.2%2m/s
21:001.2%1.8m/s
22:001.2%1.8m/s
23:001.2%2m/s
Wed, Apr 15
24:001.2%2m/s
01:001.2%2m/s
02:001.2%2.1m/s
03:001.2%2.2m/s
04:001.2%2.6m/s
05:001%3.7m/s
06:001%4.2m/s
07:001%2.9m/s
08:001.4%2.8m/s
09:000%3m/s
10:000%4.3m/s
11:000%5.4m/s
12:000%6.5m/s
13:000%6.3m/s
14:000%7.8m/s
15:000%9m/s
16:000%8.6m/s
17:000%6.8m/s
18:000%5.8m/s
19:000%5.5m/s
20:000%4m/s
21:000%4.9m/s
22:000%6.2m/s
23:000%7.2m/s
Thu, Apr 16
24:000%8m/s
01:000%7.6m/s
02:000%6.1m/s
03:000%6.1m/s
04:000%7.4m/s
05:001.3%7.9m/s
06:001.7%7.4m/s
07:001.4%6.3m/s
08:001.3%6.4m/s
09:002.6%8.2m/s
10:002.7%7.6m/s
11:000%7.9m/s
12:000%8.4m/s
13:000%8m/s
14:000%7.3m/s
15:000%7.5m/s
16:000%7.1m/s
17:000%6.7m/s
18:000%5.1m/s
19:000%3.9m/s
20:000%2m/s
21:000%1.5m/s
22:000%1.4m/s
23:000%1.3m/s
Fri, Apr 17
24:000%1.4m/s
01:000%0.84m/s
02:000%2.3m/s
03:003%3.7m/s
04:002.8%5.1m/s
05:000%4.9m/s
06:000%4.7m/s
07:000%4.5m/s
08:000%5.3m/s
09:000%6m/s
10:000%6.8m/s
11:000%6.5m/s
12:000%6.2m/s
13:000%6m/s
14:000%5.5m/s
15:000%5m/s
16:000%4.5m/s
17:000%4m/s
18:000%3.5m/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
Tue, Apr 14 Sunrise 06:09 Sunset 20:07
21:00
7.7°C 7.1°C 8.1°C - 100% 0.03kPa
22:00
7.8°C 7.1°C 8.1°C - 100% 0.02kPa
23:00
8.1°C 7.2°C 8.3°C - 100% 0.02kPa
Wed, Apr 15 Sunrise 06:09 Sunset 20:07
24:00
8.1°C 7.2°C 8.3°C - 100% 0.01kPa
01:00
8.1°C 7.2°C 8.2°C - 100% 0.01kPa
02:00
8.2°C 7.3°C 8.3°C - 100% 0.01kPa
03:00
8.4°C 7.3°C 8.5°C - 100% 0.01kPa
04:00
8.6°C 7.4°C 8.7°C - 100% 0.01kPa
05:00
9°C 7.5°C 9.3°C - 100% 0.02kPa
06:00
9.1°C 7.6°C 9.5°C - 100% 0.04kPa
07:00
8.7°C 7.7°C 9.5°C - 100% 0.06kPa
08:00
9.1°C 7.8°C 10°C - 100% 0.09kPa
09:00
9.6°C 8.1°C 11°C - 100% 0.13kPa
10:00
10°C 8.3°C 12°C - 100% 0.18kPa
11:00
10°C 8.6°C 13°C - 100% 0.21kPa
12:00
9.9°C 8.9°C 12°C - 100% 0.22kPa
13:00
9.8°C 8.9°C 12°C - 82% 0.15kPa
14:00
9.9°C 9.2°C 13°C - 76% 0.27kPa
15:00
10°C 9.5°C 13°C - 100% 0.28kPa
16:00
9.3°C 9.6°C 12°C - 100% 0.19kPa
17:00
9°C 9.8°C 12°C - 73% 0.22kPa
18:00
8.3°C 9.9°C 11°C - 9% 0.26kPa
19:00
7.4°C 9.8°C 10°C - 7% 0.21kPa
20:00
6.4°C 9.6°C 8.4°C - 5% 0.14kPa
21:00
5.7°C 9.4°C 7.6°C - 4% 0.13kPa
22:00
5.4°C 9.1°C 7.3°C - 5% 0.12kPa
23:00
5.3°C 8.9°C 6.8°C - 56% 0.09kPa
Thu, Apr 16 Sunrise 06:07 Sunset 20:09
24:00
5.3°C 8.7°C 6.8°C - 100% 0.1kPa
01:00
5.6°C 8.5°C 7.2°C - 52% 0.11kPa
02:00
5.3°C 8.3°C 7.4°C - 100% 0.13kPa
03:00
5°C 8.2°C 7.8°C - 100% 0.18kPa
04:00
4.8°C 8.1°C 7.4°C - 100% 0.17kPa
05:00
5.2°C 8°C 7.4°C - 82% 0.14kPa
06:00
4.5°C 7.8°C 6.4°C - 54% 0.12kPa
07:00
4.7°C 7.7°C 6.4°C - 72% 0.11kPa
08:00
5.1°C 7.6°C 7.5°C - 98% 0.15kPa
09:00
4.7°C 7.7°C 8.1°C - 89% 0.23kPa
10:00
5.4°C 7.7°C 8.9°C - 70% 0.24kPa
11:00
5.3°C 8.1°C 9.9°C - 60% 0.33kPa
12:00
4.9°C 8.2°C 11°C - 56% 0.42kPa
13:00
4.8°C 8.6°C 11°C - 89% 0.46kPa
14:00
5.3°C 8.6°C 11°C - 84% 0.38kPa
15:00
5.5°C 9°C 11°C - 50% 0.43kPa
16:00
5.7°C 9.1°C 11°C - 62% 0.43kPa
17:00
5.8°C 9.4°C 11°C - 100% 0.39kPa
18:00
6.3°C 9.5°C 10°C - 100% 0.31kPa
19:00
6.3°C 9.4°C 9.3°C - 100% 0.21kPa
20:00
5.7°C 9.2°C 7.5°C - 100% 0.12kPa
21:00
5.5°C 9°C 7.1°C - 100% 0.1kPa
22:00
5.4°C 8.8°C 6.8°C - 100% 0.09kPa
23:00
5.3°C 8.6°C 7°C - 100% 0.11kPa
Fri, Apr 17 Sunrise 06:04 Sunset 20:11
24:00
5.2°C 8.4°C 7.1°C - 100% 0.12kPa
01:00
5°C 8.3°C 6.9°C - 100% 0.12kPa
02:00
5.4°C 8.1°C 8°C - 100% 0.17kPa
03:00
5.9°C 8°C 9.1°C - 100% 0.23kPa
04:00
6.3°C 7.9°C 10°C - 100% 0.29kPa
05:00
6.4°C 8.1°C 10°C - 100% 0.29kPa
06:00
6.5°C 8.3°C 10°C - 100% 0.28kPa
07:00
6.6°C 8.5°C 10°C - 100% 0.28kPa
08:00
7.2°C 8.7°C 11°C - 100% 0.27kPa
09:00
7.9°C 8.9°C 11°C - 100% 0.27kPa
10:00
8.5°C 9.1°C 12°C - 100% 0.26kPa
11:00
8.7°C 9.2°C 11°C - 99% 0.23kPa
12:00
8.8°C 9.3°C 11°C - 99% 0.2kPa
13:00
8.9°C 9.4°C 11°C - 98% 0.17kPa
14:00
8.5°C 9.3°C 10°C - 99% 0.13kPa
15:00
8.1°C 9.2°C 9.4°C - 99% 0.1kPa
16:00
7.7°C 9.1°C 8.6°C - 100% 0.07kPa
17:00
7.1°C 8.9°C 8°C - 99% 0.06kPa
18:00
6.5°C 8.8°C 7.3°C - 99% 0.05kPa
19:00
5.9°C 8.6°C 6.7°C - 98% 0.05kPa
20:00
5.4°C 8.3°C 6°C - 67% 0.04kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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