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Rule Morning Frost

Buttertubs Pass - Morning Frost - Yorkshire Dales

Hawes, 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 Temperature5.9°C
Dew Point7.5°C (moderate dew point)
Wind Speed2.5m/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 91 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
06:0034%1.4m/s
07:0034%1.5m/s
08:0039%1.7m/s
09:0050%2m/s
10:0034%3.2m/s
11:0038%4.2m/s
12:0042%5m/s
13:0030%5.7m/s
14:0016%4.3m/s
15:0013%4.5m/s
16:0015%3.7m/s
17:0017%2.4m/s
18:0013%2m/s
19:0013%1.9m/s
20:0013%2.2m/s
21:0013%2.3m/s
22:0013%2.1m/s
23:0013%2.2m/s
Wed, Apr 15
24:0013%2.2m/s
01:0013%2.2m/s
02:0013%2.4m/s
03:0013%2.5m/s
04:0013%2.6m/s
05:001.2%2.7m/s
06:001%2.8m/s
07:001%2.9m/s
08:001%3m/s
09:001.2%2.7m/s
10:001.2%2.7m/s
11:001%3.4m/s
12:001.2%4.8m/s
13:001.2%5.6m/s
14:001.3%5.6m/s
15:002.6%7.5m/s
16:001.3%9.2m/s
17:001%9.5m/s
18:001.7%7.1m/s
19:002.8%8.2m/s
20:002.8%7.8m/s
21:002.5%7.2m/s
22:002.1%7.3m/s
23:002.5%7.3m/s
Thu, Apr 16
24:001%6.7m/s
01:001%6.9m/s
02:000.6%8.1m/s
03:001%9.8m/s
04:000.6%9m/s
05:000.6%8.8m/s
06:001%8.5m/s
07:000.6%7.7m/s
08:000.6%8.2m/s
09:000.6%8.4m/s
10:001%9m/s
11:001.3%8.9m/s
12:001.3%8.7m/s
13:002.6%7.9m/s
14:003.3%7.9m/s
15:004.1%7.7m/s
16:002.6%7m/s
17:002.6%6.4m/s
18:002.8%5.2m/s
19:001.7%3.5m/s
20:001.6%2.2m/s
21:001.2%2.2m/s
22:001.2%2m/s
23:001.2%2.2m/s
Fri, Apr 17
24:001.6%2.5m/s
01:001.6%2.5m/s
02:001.6%2.1m/s
03:001.9%1.8m/s
04:001.9%1.7m/s
05:001.9%1.8m/s
06:001.9%2.1m/s
07:001.9%2.1m/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
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 06:07 Sunset 20:11
03:00
7.5°C 5.9°C 7.6°C - 100% 0.01kPa
04:00
7.6°C 6°C 7.7°C - 100% 0.01kPa
05:00
7.8°C 6°C 7.9°C - 100% 0.01kPa
06:00
8.1°C 6.1°C 8.3°C - 100% 0.01kPa
07:00
8.5°C 6.3°C 8.7°C - 100% 0.02kPa
08:00
8.8°C 6.4°C 9.1°C - 100% 0.02kPa
09:00
8.9°C 6.5°C 9.3°C - 100% 0.02kPa
10:00
9.2°C 6.6°C 9.6°C - 100% 0.03kPa
11:00
9.5°C 6.9°C 10°C - 100% 0.06kPa
12:00
9.5°C 7°C 11°C - 100% 0.09kPa
13:00
9.3°C 7.2°C 10°C - 100% 0.09kPa
14:00
9.2°C 7.4°C 11°C - 80% 0.15kPa
15:00
9.6°C 7.6°C 13°C - 100% 0.28kPa
16:00
8.9°C 7.7°C 11°C - 100% 0.15kPa
17:00
7.2°C 7.7°C 8.3°C - 100% 0.08kPa
18:00
5.9°C 7.7°C 7.8°C - 49% 0.13kPa
19:00
6.4°C 7.7°C 8°C - 1% 0.11kPa
20:00
5.1°C 7.7°C 6.8°C - 5% 0.11kPa
21:00
4.5°C 7.5°C 6.2°C - 3% 0.1kPa
22:00
4.3°C 7.3°C 5.9°C - 16% 0.1kPa
23:00
4.1°C 7.2°C 5.5°C - 10% 0.08kPa
Thu, Apr 16 Sunrise 06:07 Sunset 20:11
24:00
4°C 7°C 5.2°C - 100% 0.07kPa
01:00
4.6°C 6.9°C 5.8°C - 100% 0.07kPa
02:00
5.1°C 6.8°C 5.9°C - 100% 0.05kPa
03:00
5°C 6.8°C 6.2°C - 100% 0.07kPa
04:00
4.8°C 6.7°C 5.8°C - 100% 0.06kPa
05:00
4.9°C 6.6°C 5.8°C - 100% 0.06kPa
06:00
4.8°C 6.5°C 5.9°C - 100% 0.06kPa
07:00
5.1°C 6.5°C 5.8°C - 100% 0.04kPa
08:00
5.3°C 6.4°C 6°C - 99% 0.05kPa
09:00
5.5°C 6.5°C 6.4°C - 98% 0.06kPa
10:00
5.3°C 6.5°C 6.9°C - 93% 0.1kPa
11:00
5.1°C 6.5°C 7.5°C - 87% 0.15kPa
12:00
4.9°C 6.6°C 7.9°C - 90% 0.19kPa
13:00
4.7°C 6.8°C 8°C - 83% 0.21kPa
14:00
4.5°C 6.9°C 8.5°C - 40% 0.27kPa
15:00
4.3°C 7.1°C 9.2°C - 7% 0.33kPa
16:00
4.2°C 7.3°C 9.2°C - 84% 0.34kPa
17:00
4.4°C 7.5°C 9°C - 100% 0.31kPa
18:00
5°C 7.5°C 8.4°C - 100% 0.23kPa
19:00
5.3°C 7.5°C 7.6°C - 100% 0.15kPa
20:00
4.8°C 7.4°C 6.1°C - 100% 0.08kPa
21:00
4.8°C 7.2°C 5.7°C - 100% 0.05kPa
22:00
4.8°C 7.1°C 5.8°C - 100% 0.06kPa
23:00
4.7°C 7°C 5.7°C - 100% 0.06kPa
Fri, Apr 17 Sunrise 06:05 Sunset 20:13
24:00
4.5°C 6.9°C 5.7°C - 100% 0.07kPa
01:00
4°C 6.8°C 5.6°C - 100% 0.1kPa
02:00
3.5°C 6.6°C 5.1°C - 100% 0.09kPa
03:00
3.6°C 6.6°C 5.6°C - 100% 0.11kPa
04:00
3.8°C 6.5°C 5.9°C - 100% 0.13kPa
05:00
3.8°C 6.5°C 5.9°C - 100% 0.13kPa
06:00
3.6°C 6.4°C 6°C - 100% 0.15kPa
07:00
3.9°C 6.4°C 6.3°C - 100% 0.15kPa
08:00
5.4°C 7°C 7.8°C - 94% 0.16kPa
09:00
6.8°C 7.6°C 9.2°C - 88% 0.17kPa
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 06:03 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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