Skip to content
Rule Morning Frost

Ullapool - Morning Frost - Scotland

Ullapool, Scotland, 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

Get notified
Free alerts · takes 30 seconds
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 90% failing
Time Window 83% failing

Currently

Real-time conditions
Soil Temperature11.0°C
Dew Point10.5°C (moderate dew point)
Wind Speed3.6m/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 tracks the conditions that create Scotland's dramatic frost photography opportunities. We combine temperature, dewpoint, wind, and humidity data to predict when hoar frost will form across Highland landscapes.

The Scottish Highlands offer exceptional frost photography from November through March. Cold clear nights combined with Scotland's naturally high humidity create heavy hoar frost formations that transform heather moorlands, frozen lochs, and mountain valleys into winter wonderlands. The dramatic Highland topography means frost conditions vary by elevation and exposure, creating diverse opportunities.

What makes Scotland special for frost photography:

  • Highland hoar frost - Heavy frost deposits on heather create sparkling purple-white moorlands
  • Frozen lochs - Ice formations along loch shores, particularly in the Cairngorms
  • Mountain ice crystals - High Cairngorms peaks develop spectacular rime ice formations
  • Glen Coe frost - The famous valley transformed by frost on grass and bracken

Rannoch Moor becomes otherworldly under heavy frost—the vast peatland plateau covered in sparkling crystals with distant peaks beyond. The Cairngorms' high elevation means consistent frost formation, with frozen pools and ice-covered grasses creating miniature landscapes. Glen Coe's dramatic valley takes on ethereal beauty when frost transforms the bracken-covered slopes. Frozen lochs like Loch an Eilein develop fascinating ice patterns along their shores. The key is clear, calm nights following cold days—our forecast identifies these conditions and tracks morning visibility to ensure you can capture the frost before it melts.

Create your own Morning Frost alerts

Get notified when these conditions match at your own locations.

Get this template

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, May 23
14:000%8.6m/s
15:000%9.4m/s
16:000%9.1m/s
17:000%8.1m/s
18:000%8.1m/s
19:000%7.5m/s
20:000%7.6m/s
21:000%7.3m/s
22:000%7.1m/s
23:000%8.1m/s
Sun, May 24
24:000%7.4m/s
01:000%7m/s
02:000%7m/s
03:000%6.9m/s
04:000%5.7m/s
05:000%4.8m/s
06:000%3.5m/s
07:000%3.3m/s
08:000%2.8m/s
09:000%2.8m/s
10:000%3.1m/s
11:000%3m/s
12:000%2.9m/s
13:000%3.2m/s
14:000%3.6m/s
15:000%3.9m/s
16:000%5.1m/s
17:000%5.5m/s
18:000%6.3m/s
19:000%5.4m/s
20:000%4.9m/s
21:000%3.9m/s
22:000%3.7m/s
23:000%5.2m/s
Mon, May 25
24:000%6.3m/s
01:000%5.3m/s
02:000%5.1m/s
03:000%5.8m/s
04:000%5.7m/s
05:000%5.4m/s
06:000%5.5m/s
07:000%5.4m/s
08:000%5.1m/s
09:000%4.7m/s
10:000%4.2m/s
11:000%3.8m/s
12:000%4m/s
13:000%5m/s
14:000%5m/s
15:000%5.3m/s
16:000%5.3m/s
17:000%5.7m/s
18:000%7.1m/s
19:000%6.7m/s
20:000%6.3m/s
21:000%5.5m/s
22:000%4.9m/s
23:000%4.5m/s
Tue, May 26
24:000%4.4m/s
01:000%4.9m/s
02:000%5.1m/s
03:000%4.9m/s
04:000%5.1m/s
05:000%4.6m/s
06:000%4.1m/s
07:000%3.9m/s
08:000%4.4m/s
09:000%4.4m/s
10:000%4.2m/s
11:000%3.6m/s
12:000%3.3m/s
13:000%3m/s
14:000%2.7m/s
15:000%2.8m/s
16:000%2.8m/s
17:000%2.5m/s
18:000%2.4m/s
19:000%2.4m/s
20:000%2.2m/s
21:000%2.1m/s
22:000%2m/s
23:000%2m/s
Wed, May 27
24:000%2m/s
01:000%2m/s
02:000%1.9m/s
03:000%1.9m/s
04:000%1.8m/s
05:000%1.5m/s
06:000%1.2m/s
07:000%0.96m/s
08:000%0.92m/s
09:000%0.88m/s
10:000%0.83m/s
11:000%0.97m/s
12:000%1.1m/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, May 24 Sunrise 04:40 Sunset 21:55
14:00
11°C 11°C 12°C - 100% 0.15kPa
15:00
11°C 11°C 12°C - 100% 0.13kPa
16:00
11°C 11°C 12°C - 100% 0.14kPa
17:00
11°C 11°C 12°C - 100% 0.15kPa
18:00
11°C 11°C 13°C - 100% 0.18kPa
19:00
11°C 11°C 12°C - 100% 0.16kPa
20:00
11°C 11°C 13°C - 100% 0.17kPa
21:00
11°C 11°C 12°C - 100% 0.14kPa
22:00
11°C 11°C 12°C - 100% 0.13kPa
23:00
11°C 11°C 13°C - 100% 0.15kPa
Mon, May 25 Sunrise 04:40 Sunset 21:55
24:00
11°C 11°C 13°C - 100% 0.15kPa
01:00
11°C 11°C 12°C - 100% 0.14kPa
02:00
11°C 11°C 13°C - 100% 0.16kPa
03:00
11°C 11°C 13°C - 100% 0.18kPa
04:00
11°C 11°C 13°C - 100% 0.17kPa
05:00
11°C 11°C 12°C - 100% 0.14kPa
06:00
11°C 11°C 12°C - 100% 0.16kPa
07:00
10°C 11°C 12°C - 100% 0.15kPa
08:00
10°C 11°C 12°C - 100% 0.12kPa
09:00
11°C 11°C 12°C - 100% 0.1kPa
10:00
11°C 11°C 12°C - 100% 0.08kPa
11:00
11°C 11°C 12°C - 100% 0.09kPa
12:00
10°C 11°C 12°C - 100% 0.12kPa
13:00
10°C 11°C 12°C - 100% 0.12kPa
14:00
10°C 11°C 12°C - 100% 0.12kPa
15:00
10°C 11°C 12°C - 100% 0.15kPa
16:00
10°C 11°C 12°C - 99% 0.14kPa
17:00
10°C 11°C 12°C - 46% 0.17kPa
18:00
9.9°C 12°C 13°C - 24% 0.25kPa
19:00
9.6°C 12°C 12°C - 24% 0.24kPa
20:00
9.1°C 12°C 12°C - 12% 0.23kPa
21:00
8.7°C 12°C 11°C - 5% 0.2kPa
22:00
8.4°C 11°C 10°C - 5% 0.16kPa
23:00
8.1°C 11°C 10°C - 40% 0.16kPa
Tue, May 26 Sunrise 04:39 Sunset 21:57
24:00
7.9°C 11°C 10°C - 90% 0.16kPa
01:00
7.8°C 11°C 10°C - 70% 0.2kPa
02:00
7.8°C 11°C 10°C - 67% 0.19kPa
03:00
7.8°C 11°C 10°C - 86% 0.17kPa
04:00
7.9°C 11°C 10°C - 96% 0.16kPa
05:00
8°C 10°C 9.8°C - 78% 0.14kPa
06:00
8.2°C 10°C 9.8°C - 36% 0.12kPa
07:00
8.2°C 10°C 10°C - 8% 0.14kPa
08:00
8°C 10°C 11°C - 10% 0.2kPa
09:00
7.7°C 11°C 11°C - 33% 0.26kPa
10:00
7.3°C 11°C 11°C - 9% 0.31kPa
11:00
7°C 11°C 12°C - 5% 0.38kPa
12:00
6.6°C 12°C 12°C - 8% 0.43kPa
13:00
6.1°C 12°C 12°C - 30% 0.5kPa
14:00
5.7°C 12°C 13°C - 13% 0.56kPa
15:00
5.5°C 13°C 13°C - 68% 0.57kPa
16:00
5.5°C 13°C 13°C - 36% 0.55kPa
17:00
5.8°C 13°C 13°C - 86% 0.53kPa
18:00
5.8°C 13°C 12°C - 21% 0.5kPa
19:00
5.9°C 13°C 12°C - 39% 0.46kPa
20:00
5.5°C 12°C 9.7°C - 28% 0.3kPa
21:00
4.9°C 11°C 7.6°C - 16% 0.18kPa
22:00
4.2°C 9.7°C 5.6°C - 5% 0.08kPa
23:00
4.4°C 9.5°C 6.5°C - 5% 0.13kPa
Wed, May 27 Sunrise 04:37 Sunset 21:59
24:00
4.6°C 9.3°C 7.5°C - 5% 0.19kPa
01:00
4.8°C 9.1°C 8.5°C - 5% 0.25kPa
02:00
5.6°C 9.4°C 10°C - 5% 0.34kPa
03:00
6.2°C 9.7°C 12°C - 5% 0.46kPa
04:00
6.8°C 10°C 14°C - 5% 0.59kPa
05:00
7.3°C 11°C 16°C - 5% 0.74kPa
06:00
7.7°C 11°C 17°C - 5% 0.92kPa
07:00
7.9°C 12°C 19°C - 5% 1.1kPa
08:00
8.3°C 13°C 20°C - 9% 1.2kPa
09:00
8.7°C 14°C 20°C - 14% 1.2kPa
10:00
9.1°C 15°C 21°C - 18% 1.3kPa
11:00
9.4°C 15°C 20°C - 17% 1.1kPa
12:00
9.8°C 15°C 19°C - 16% 1kPa
13:00
10°C 16°C 18°C - 15% 0.88kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

Get Notified of Opportunities

Create your own custom alerts for this location and more.

Create Free Account