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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

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
Wind Speed 100% failing
Time Window 88% failing

Currently

Real-time conditions
Soil Temperature6.9°C
Dew Point7.7°C (moderate dew point)
Wind Speed2.7m/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 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, Apr 14
03:0037%1.5m/s
04:0034%1.5m/s
05:0034%1.5m/s
06:0036%1.4m/s
07:0036%1.4m/s
08:0039%1.5m/s
09:0050%1.9m/s
10:0038%3.1m/s
11:0040%4.6m/s
12:0038%4.8m/s
13:0038%5.3m/s
14:002.8%5.2m/s
15:001.5%4.3m/s
16:001.5%4.9m/s
17:001.4%3.7m/s
18:001.4%3m/s
19:001%2.8m/s
20:001%2.9m/s
21:001.2%2.3m/s
22:001.2%2m/s
23:001.2%2m/s
Wed, Apr 15
24:001.2%2.1m/s
01:001.2%2.3m/s
02:001.2%2.5m/s
03:001.2%2.7m/s
04:001.2%2.6m/s
05:001.2%2.6m/s
06:001.2%2.8m/s
07:001%3.2m/s
08:001%3.1m/s
09:001.2%2.7m/s
10:001.4%2.9m/s
11:001.5%4.3m/s
12:000%6.4m/s
13:000%6.8m/s
14:000%7.2m/s
15:000%8.1m/s
16:000%9.6m/s
17:000%9.7m/s
18:000%6.4m/s
19:000%7.8m/s
20:000%7.2m/s
21:000%6.7m/s
22:000%7.4m/s
23:000%7.3m/s
Thu, Apr 16
24:001%7.2m/s
01:001%7.7m/s
02:001%8.6m/s
03:001.3%8.9m/s
04:001%8.9m/s
05:001%8.8m/s
06:001.3%8.9m/s
07:001%8.4m/s
08:001%8.2m/s
09:001.1%8.1m/s
10:001.3%9m/s
11:002.7%8.9m/s
12:003.3%8.9m/s
13:003.3%8.4m/s
14:000%8.2m/s
15:000%8m/s
16:000%7.4m/s
17:000%6.7m/s
18:000%5.7m/s
19:000%4.5m/s
20:000%3m/s
21:000%2.5m/s
22:000%2.3m/s
23:001.6%2m/s
Fri, Apr 17
24:001.6%2.4m/s
01:001.9%2.5m/s
02:001.9%2.3m/s
03:001.9%2.3m/s
04:001.9%2.1m/s
05:001.9%2m/s
06:001.9%2.1m/s
07:001.9%2m/s
08:001.7%3.5m/s
09:001.5%5m/s
10:000%6.5m/s
11:000%6.2m/s
12:000%5.9m/s
13:000%5.7m/s
14:000%5.9m/s
15:000%6.2m/s
16:000%6.4m/s
17:001.3%6.7m/s
18:001.3%7m/s
19:001.3%7.4m/s
20:001.3%8.1m/s
21:001.3%8.9m/s
22:001.3%9.7m/s
23:001.3%9.4m/s
Sat, Apr 18
24:001%9m/s
01:000.6%8.7m/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, Apr 15 Sunrise 06:06 Sunset 20:10
03:00
7.7°C 6.9°C 7.9°C - 100% 0.01kPa
04:00
7.8°C 7°C 8°C - 100% 0.01kPa
05:00
8°C 7°C 8.1°C - 100% 0.01kPa
06:00
8.2°C 7.1°C 8.4°C - 100% 0.01kPa
07:00
8.7°C 7.2°C 8.9°C - 100% 0.02kPa
08:00
9°C 7.2°C 9.4°C - 100% 0.03kPa
09:00
9.2°C 7.5°C 9.8°C - 100% 0.05kPa
10:00
9.4°C 7.6°C 10°C - 100% 0.08kPa
11:00
9.7°C 7.9°C 11°C - 100% 0.14kPa
12:00
9.6°C 8.2°C 12°C - 100% 0.18kPa
13:00
9.4°C 8.4°C 11°C - 100% 0.11kPa
14:00
9°C 8.5°C 11°C - 61% 0.17kPa
15:00
9.2°C 8.9°C 13°C - 95% 0.36kPa
16:00
9°C 9.1°C 12°C - 99% 0.21kPa
17:00
8.9°C 9.2°C 10°C - 100% 0.1kPa
18:00
5.7°C 9.1°C 8°C - 25% 0.16kPa
19:00
6.6°C 9°C 8.4°C - 1% 0.13kPa
20:00
5.5°C 8.8°C 7.3°C - 4% 0.12kPa
21:00
4.9°C 8.6°C 6.7°C - 1% 0.11kPa
22:00
4.5°C 8.4°C 6.4°C - 2% 0.12kPa
23:00
4.5°C 8.2°C 5.9°C - 2% 0.09kPa
Thu, Apr 16 Sunrise 06:06 Sunset 20:10
24:00
4.1°C 7.9°C 5.5°C - 84% 0.08kPa
01:00
4.7°C 7.8°C 6.2°C - 100% 0.09kPa
02:00
4.9°C 7.6°C 6.3°C - 100% 0.09kPa
03:00
5°C 7.6°C 6.8°C - 100% 0.11kPa
04:00
4.8°C 7.5°C 6.5°C - 100% 0.1kPa
05:00
4.6°C 7.4°C 6.2°C - 100% 0.1kPa
06:00
4.5°C 7.3°C 6.4°C - 100% 0.12kPa
07:00
4.8°C 7.2°C 6.3°C - 100% 0.09kPa
08:00
5.1°C 7.2°C 6.3°C - 98% 0.08kPa
09:00
5.4°C 7.2°C 7°C - 71% 0.1kPa
10:00
5.1°C 7.2°C 7.7°C - 96% 0.17kPa
11:00
4.7°C 7.4°C 8.1°C - 73% 0.22kPa
12:00
4.6°C 7.6°C 8.9°C - 35% 0.29kPa
13:00
4.6°C 7.8°C 9.5°C - 29% 0.33kPa
14:00
4.4°C 8.1°C 9.8°C - 11% 0.37kPa
15:00
4.1°C 8.4°C 10°C - 6% 0.42kPa
16:00
4°C 8.6°C 10°C - 75% 0.42kPa
17:00
4.1°C 8.8°C 9.8°C - 100% 0.39kPa
18:00
5.1°C 8.8°C 9.1°C - 100% 0.27kPa
19:00
5.3°C 8.7°C 8.1°C - 100% 0.19kPa
20:00
4.8°C 8.6°C 6.7°C - 100% 0.12kPa
21:00
4.7°C 8.3°C 6.2°C - 100% 0.09kPa
22:00
4.6°C 8.2°C 6.3°C - 100% 0.1kPa
23:00
4.7°C 8°C 6.1°C - 100% 0.08kPa
Fri, Apr 17 Sunrise 06:04 Sunset 20:12
24:00
4.6°C 7.8°C 6.3°C - 100% 0.1kPa
01:00
3.9°C 7.7°C 6.2°C - 100% 0.14kPa
02:00
3.4°C 7.5°C 5.9°C - 100% 0.14kPa
03:00
3.6°C 7.4°C 6.2°C - 100% 0.16kPa
04:00
3.6°C 7.3°C 6.5°C - 100% 0.17kPa
05:00
3.7°C 7.3°C 6.5°C - 100% 0.17kPa
06:00
3.6°C 7.2°C 6.3°C - 100% 0.17kPa
07:00
4°C 7.1°C 6.6°C - 100% 0.16kPa
08:00
5.4°C 7.5°C 8°C - 94% 0.17kPa
09:00
6.8°C 7.8°C 9.3°C - 88% 0.18kPa
10:00
8.3°C 8.2°C 11°C - 81% 0.19kPa
11:00
7.9°C 8.3°C 10°C - 88% 0.19kPa
12:00
7.6°C 8.4°C 10°C - 94% 0.18kPa
13:00
7.3°C 8.6°C 9.7°C - 100% 0.18kPa
14:00
6.3°C 8.4°C 8.6°C - 98% 0.17kPa
15:00
5.3°C 8.2°C 7.6°C - 97% 0.15kPa
16:00
4.3°C 8.1°C 6.5°C - 95% 0.14kPa
17:00
4.2°C 7.9°C 6.4°C - 97% 0.14kPa
18:00
4.1°C 7.7°C 6.4°C - 98% 0.14kPa
19:00
4°C 7.5°C 6.3°C - 100% 0.14kPa
20:00
3.7°C 7.3°C 6.1°C - 100% 0.14kPa
21:00
3.4°C 7.2°C 5.8°C - 100% 0.14kPa
22:00
3.1°C 7.1°C 5.6°C - 100% 0.14kPa
23:00
3.9°C 7°C 5.8°C - 100% 0.11kPa
Sat, Apr 18 Sunrise 06:02 Sunset 20:14
24:00
4.7°C 6.9°C 6°C - 100% 0.08kPa
01:00
5.5°C 6.8°C 6.2°C - 100% 0.04kPa
02:00
5.1°C 6.7°C 6°C - 100% 0.05kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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