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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 86% failing

Currently

Real-time conditions
Soil Temperature5.5°C
Dew Point-0.9°C (low dew point)
Wind Speed13.9m/s (moderate winds)
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
Sat, Apr 4
02:0028%5.4m/s
03:0028%4.8m/s
04:0030%3.8m/s
05:0032%2.4m/s
06:0013%1.9m/s
07:0014%2.2m/s
08:0015%2.2m/s
09:0017%3.3m/s
10:0015%4.3m/s
11:0013%3.6m/s
12:0018%4.6m/s
13:0016%4.3m/s
14:0014%9.4m/s
15:0027%10m/s
16:0028%11m/s
17:0027%11m/s
18:002.6%12m/s
19:001.3%12m/s
20:002.6%13m/s
21:001.3%13m/s
22:001.7%17m/s
23:002.4%16m/s
Sun, Apr 5
24:001.3%16m/s
01:001%16m/s
02:0012%12m/s
03:0014%14m/s
04:0014%13m/s
05:0018%11m/s
06:0015%8.4m/s
07:0018%8.1m/s
08:0015%8.1m/s
09:0011%8.7m/s
10:0014%9.7m/s
11:0029%9m/s
12:0038%11m/s
13:0032%10m/s
14:0031%11m/s
15:0027%11m/s
16:0031%9.4m/s
17:0028%9.1m/s
18:0023%8.5m/s
19:0033%7m/s
20:0025%5.2m/s
21:0019%2.9m/s
22:0017%2.6m/s
23:0017%2.4m/s
Mon, Apr 6
24:0017%2.5m/s
01:0017%2.7m/s
02:0015%2.9m/s
03:0017%3m/s
04:0017%3.1m/s
05:0017%2.9m/s
06:0019%2.6m/s
07:0015%2.5m/s
08:0019%2.6m/s
09:0028%2.8m/s
10:0033%3.2m/s
11:0035%5.2m/s
12:0031%6.3m/s
13:0033%6.8m/s
14:0036%6.9m/s
15:0031%6.6m/s
16:0027%6.2m/s
17:0029%5.2m/s
18:0029%4.4m/s
19:0018%3.3m/s
20:0017%2.2m/s
21:0017%2.1m/s
22:0021%2m/s
23:0028%1.9m/s
Tue, Apr 7
24:0030%1.7m/s
01:0022%1.6m/s
02:0030%1.6m/s
03:0028%1.7m/s
04:0028%1.7m/s
05:0028%1.9m/s
06:0030%1.9m/s
07:0034%1.8m/s
08:0025%3.4m/s
09:002.9%5.1m/s
10:002.8%6.7m/s
11:002.6%6m/s
12:002.8%5.4m/s
13:000%4.7m/s
14:001.7%4.1m/s
15:001.4%3.5m/s
16:001%2.8m/s
17:001.3%2.7m/s
18:001.9%2.5m/s
19:002.7%2.3m/s
20:003.1%2.3m/s
21:0032%2.3m/s
22:0028%2.3m/s
23:0021%2.4m/s
Wed, Apr 8
24:0018%2.4m/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, Apr 5 Sunrise 06:31 Sunset 19:51
03:00
-0.9°C 5.5°C 1.9°C - 100% 0.13kPa
04:00
-0.8°C 5.3°C 1.9°C - 100% 0.12kPa
05:00
-1.1°C 5°C 1.9°C - 54% 0.13kPa
06:00
-1°C 4.7°C 1.5°C - 68% 0.11kPa
07:00
-0.7°C 4.5°C 1.8°C - 42% 0.12kPa
08:00
0.2°C 4.4°C 2.4°C - 46% 0.1kPa
09:00
1.6°C 4.3°C 2.7°C - 87% 0.06kPa
10:00
0.9°C 4.4°C 3°C - 100% 0.11kPa
11:00
0°C 4.4°C 2.8°C - 6% 0.13kPa
12:00
-0.7°C 4.6°C 4.1°C - 14% 0.24kPa
13:00
-1.6°C 4.7°C 4.8°C - 66% 0.32kPa
14:00
-1.5°C 5°C 4.8°C - 100% 0.31kPa
15:00
-0.7°C 5.1°C 4.5°C - 100% 0.27kPa
16:00
-1.4°C 5.3°C 4.5°C - 49% 0.29kPa
17:00
-1°C 5.4°C 4.3°C - 79% 0.26kPa
18:00
-0.5°C 5.4°C 3.6°C - 75% 0.2kPa
19:00
-0.9°C 5.2°C 2.7°C - 24% 0.17kPa
20:00
-1.6°C 4.9°C 1.5°C - 73% 0.14kPa
21:00
-1.8°C 4.7°C 0.35°C - 56% 0.09kPa
22:00
-2°C 4.4°C -0.34°C - 92% 0.07kPa
23:00
-2.1°C 4.4°C -0.5°C - 96% 0.06kPa
Mon, Apr 6 Sunrise 06:31 Sunset 19:51
24:00
-2°C 4.4°C -0.45°C - 89% 0.06kPa
01:00
-1.9°C 4.4°C -0.45°C - 99% 0.06kPa
02:00
-1.4°C 4.2°C -0.32°C - 92% 0.05kPa
03:00
-1.4°C 4°C -0.2°C - 90% 0.05kPa
04:00
-1.1°C 3.7°C -0.04°C - 95% 0.05kPa
05:00
-0.4°C 3.5°C 0.61°C - 100% 0.04kPa
06:00
0.7°C 3.4°C 2.4°C - 100% 0.08kPa
07:00
0.4°C 3.3°C 1.4°C - 100% 0.04kPa
08:00
0.8°C 3.3°C 2.6°C - 100% 0.09kPa
09:00
0.5°C 3.3°C 4°C - 100% 0.18kPa
10:00
-0.1°C 3.3°C 4.7°C - 100% 0.25kPa
11:00
-0.6°C 3.3°C 6.3°C - 100% 0.37kPa
12:00
0.3°C 3.5°C 7.7°C - 100% 0.42kPa
13:00
1.9°C 3.7°C 8.3°C - 89% 0.39kPa
14:00
2.8°C 4.1°C 9.1°C - 38% 0.41kPa
15:00
3.8°C 4.6°C 9.7°C - 51% 0.4kPa
16:00
4.5°C 5.2°C 9.8°C - 95% 0.37kPa
17:00
5.3°C 5.6°C 9.1°C - 100% 0.26kPa
18:00
5.5°C 5.8°C 8.8°C - 100% 0.23kPa
19:00
5.1°C 6°C 7.6°C - 100% 0.16kPa
20:00
4.2°C 5.9°C 5.6°C - 100% 0.09kPa
21:00
4°C 5.7°C 5.3°C - 100% 0.07kPa
22:00
3.8°C 5.6°C 4.9°C - 55% 0.06kPa
23:00
3.4°C 5.4°C 4.4°C - 6% 0.06kPa
Tue, Apr 7 Sunrise 06:28 Sunset 19:53
24:00
3.1°C 5.2°C 4°C - 5% 0.05kPa
01:00
2.8°C 5°C 3.7°C - 31% 0.05kPa
02:00
2.7°C 4.8°C 3.5°C - 5% 0.04kPa
03:00
2.3°C 4.6°C 3.1°C - 5% 0.04kPa
04:00
2°C 4.4°C 2.6°C - 5% 0.03kPa
05:00
1.6°C 4.2°C 2.3°C - 5% 0.03kPa
06:00
0.9°C 3.9°C 1.8°C - 4% 0.04kPa
07:00
0.7°C 3.7°C 1.9°C - 5% 0.06kPa
08:00
2.9°C 4.9°C 5.5°C - 37% 0.15kPa
09:00
4.8°C 6.1°C 9.1°C - 68% 0.3kPa
10:00
6.4°C 7.4°C 13°C - 100% 0.51kPa
11:00
6.6°C 7.6°C 12°C - 96% 0.4kPa
12:00
6.6°C 7.8°C 11°C - 93% 0.3kPa
13:00
6.6°C 8.1°C 9.4°C - 89% 0.21kPa
14:00
5.8°C 7.8°C 7.9°C - 93% 0.15kPa
15:00
4.9°C 7.6°C 6.4°C - 96% 0.09kPa
16:00
4.1°C 7.4°C 4.9°C - 100% 0.05kPa
17:00
3.6°C 7.1°C 4.5°C - 68% 0.05kPa
18:00
3.2°C 6.8°C 4.1°C - 37% 0.05kPa
19:00
2.8°C 6.5°C 3.7°C - 5% 0.05kPa
20:00
2.5°C 6.2°C 3.5°C - 7% 0.06kPa
21:00
2.2°C 5.9°C 3.4°C - 9% 0.06kPa
22:00
1.9°C 5.6°C 3.2°C - 11% 0.07kPa
23:00
2°C 5.3°C 3.3°C - 41% 0.07kPa
Wed, Apr 8 Sunrise 06:26 Sunset 19:55
24:00
2.1°C 5.1°C 3.4°C - 70% 0.07kPa
01:00
2.3°C 4.9°C 3.5°C - 100% 0.06kPa
02:00
3.2°C 5.1°C 5.4°C - 100% 0.13kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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