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More Morning Frost in Trossachs & Loch Lomond
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Rule Morning Frost

Inversnaid - Morning Frost - Trossachs & Loch Lomond

Inversnaid, 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

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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 93% failing
Time Window 88% failing

Currently

Real-time conditions
Frost Probability
1%
Soil Temperature8.0°C
Dew Point6.3°C (moderate dew point)
Wind Speed2.2m/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 frost conditions will transform the Trossachs landscape into a winter wonderland. We track overnight temperatures, humidity, and wind to predict when clear, calm nights will produce photogenic frost—hoar frost coating vegetation, ice crystals along shorelines, and frozen lochs creating winter magic.

The Trossachs' Highland fringe position means genuine winter cold while remaining accessible. The combination of lochs, forest, and mountains creates varied frost opportunities, from frozen shorelines to summit hoar frost on Ben A'an.

What makes the Trossachs special for frost photography:

  • Loch shorelines - Ice formations at water's edge at Loch Ard and Loch Achray
  • Forest frost - Native oak and birch woodland coated in hoar frost creating fairy-tale scenes
  • Mountain hoar frost - Ben A'an summit vegetation transformed by ice crystal deposits
  • Waterfall ice - Bracklinn Falls near Callander with ice formations and icicles

Loch Ard's forested shoreline after a hard frost creates magical scenes—oak trees coated in hoar frost, ice crystals along the water's edge, frozen grasses catching low winter sunlight. Ben A'an's summit on frosty mornings combines hoar frost with panoramic views across frozen landscape. Bracklinn Falls develops impressive ice formations during cold spells. Best frost photography occurs December-February during high-pressure systems. Timing is critical—frost is most photogenic at sunrise before sun melts the crystals.

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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
Wed, Apr 8
06:00✓1.4%1.1m/s
07:00✓1.4%1.2m/s
08:00✓1.4%1.1m/s
09:00✕1.4%1.2m/s
10:00✕0%1.5m/s
11:00✕0%1.6m/s
12:00✕0%2.2m/s
13:00✕0%2m/s
14:00✕0%1.8m/s
15:00✕0%2.4m/s
16:00✕0%2.9m/s
17:00✕0%2.4m/s
18:00✕0%2.1m/s
19:00✕0%1.4m/s
20:00✕0%1.7m/s
21:00✕0%1.7m/s
22:00✕0%1.4m/s
23:00✕0%1.6m/s
Thu, Apr 9
24:00✕0%1.4m/s
01:00✕0%1.7m/s
02:00✕0%2.1m/s
03:00✕1.2%2.2m/s
04:00✕1.2%2m/s
05:00✓1.2%2.4m/s
06:00✓1.2%1.9m/s
07:00✓1.2%2.5m/s
08:00✕1%3.8m/s
09:00✕1.2%2m/s
10:00✕1%3.5m/s
11:00✕1%4m/s
12:00✕2.1%6.3m/s
13:00✕3%7.3m/s
14:00✕3.7%8.2m/s
15:00✕3.7%8.4m/s
16:00✕2.1%8.3m/s
17:00✕0.6%7m/s
18:00✕1%7.2m/s
19:00✕7%6.9m/s
20:00✕7%6.3m/s
21:00✕9%5.2m/s
22:00✕9%4.7m/s
23:00✕15%4.1m/s
Fri, Apr 10
24:00✕31%5.1m/s
01:00✕30%3.7m/s
02:00✕32%1.9m/s
03:00✕28%1.8m/s
04:00✕30%1.7m/s
05:00✓26%1.5m/s
06:00✓26%1.5m/s
07:00✓20%1.2m/s
08:00✕20%1.2m/s
09:00✕32%1.4m/s
10:00✕35%2.2m/s
11:00✕35%2.5m/s
12:00✕33%3m/s
13:00✕33%3.7m/s
14:00✕35%4.6m/s
15:00✕35%5m/s
16:00✕35%5.5m/s
17:00✕33%6.6m/s
18:00✕37%7.3m/s
19:00✕37%7.6m/s
20:00✕29%7.1m/s
21:00✕24%6.2m/s
22:00✕16%6.7m/s
23:00✕11%5.6m/s
Sat, Apr 11
24:00✕9%7m/s
01:00✕9%5.9m/s
02:00✕11%4.9m/s
03:00✕11%5.1m/s
04:00✕11%4.3m/s
05:00✓11%4.6m/s
06:00✓15%4.7m/s
07:00✓22%4.5m/s
08:00✕25%5.6m/s
09:00✕38%6.7m/s
10:00✕42%7.8m/s
11:00✕36%7.7m/s
12:00✕3.1%7.6m/s
13:00✕2.6%7.5m/s
14:00✕22%7.2m/s
15:00✕14%6.8m/s
16:00✕11%6.5m/s
17:00✕11%6.7m/s
18:00✕14%7m/s
19:00✕14%7.2m/s
20:00✕14%7.3m/s
21:00✕14%7.5m/s
22:00✕14%7.6m/s
23:00✕11%7.8m/s
Sun, Apr 12
24:00✕11%8m/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
Thu, Apr 9 Sunrise 06:28 Sunset 20:13
03:00 ☾
6.3°C 8°C 7°C - 100% 0.05kPa
04:00 ☾
5.8°C 7.9°C 6.6°C - 100% 0.05kPa
05:00 ☾
5.7°C 7.7°C 6°C - 100% 0.02kPa
06:00 ☾
5.7°C 7.5°C 5.9°C - 100% 0.01kPa
07:00
5.8°C 7.4°C 6°C - 100% 0.01kPa
08:00
4.7°C 7.2°C 5.2°C - 100% 0.03kPa
09:00
3.2°C 7°C 3.5°C - 100% 0.02kPa
10:00
3.3°C 6.7°C 3.8°C - 100% 0.03kPa
11:00
2.5°C 6.6°C 3.5°C - 100% 0.05kPa
12:00
1.4°C 6.5°C 4.6°C - 96% 0.17kPa
13:00
0.6°C 6.5°C 5.6°C - 47% 0.27kPa
14:00
0.2°C 6.6°C 5.7°C - 22% 0.29kPa
15:00
-0.4°C 6.6°C 5.6°C - 15% 0.31kPa
16:00
1.5°C 6.7°C 5.1°C - 100% 0.19kPa
17:00
2.1°C 6.5°C 2.9°C - 100% 0.04kPa
18:00
2°C 6.2°C 3.1°C - 96% 0.05kPa
19:00
2.2°C 6°C 2.8°C - 100% 0.04kPa
20:00
1.9°C 5.7°C 2.6°C - 99% 0.04kPa
21:00 ☾
1.5°C 5.5°C 2.2°C - 100% 0.04kPa
22:00 ☾
1°C 5.2°C 1.9°C - 85% 0.04kPa
23:00 ☾
-0.2°C 4.9°C 1.8°C - 94% 0.09kPa
Fri, Apr 10 Sunrise 06:28 Sunset 20:13
24:00 ☾
-1°C 4.7°C 1.5°C - 5% 0.11kPa
01:00 ☾
-1.9°C 4.4°C 0.5°C - 5% 0.1kPa
02:00 ☾
-2.1°C 4.3°C -0.55°C - 5% 0.07kPa
03:00 ☾
-2.4°C 4.3°C -1.1°C - 10% 0.05kPa
04:00 ☾
-2.4°C 4.3°C -1.2°C - 10% 0.05kPa
05:00 ☾
-2.6°C 4.3°C -1.4°C - 31% 0.05kPa
06:00 ☾
-2.5°C 4.3°C -1.3°C - 27% 0.05kPa
07:00
-2.3°C 4.3°C -1°C - 74% 0.05kPa
08:00
-1.6°C 4°C 0.54°C - 69% 0.09kPa
09:00
-1.3°C 4°C 2.1°C - 84% 0.16kPa
10:00
-1.2°C 4°C 3.4°C - 100% 0.22kPa
11:00
-1.3°C 4°C 4°C - 100% 0.26kPa
12:00
-1.4°C 4°C 3.9°C - 100% 0.26kPa
13:00
-1.7°C 4°C 4.1°C - 100% 0.28kPa
14:00
-2.4°C 4°C 5°C - 100% 0.36kPa
15:00
-2.2°C 4°C 4.9°C - 100% 0.34kPa
16:00
-1.4°C 4°C 5.3°C - 100% 0.34kPa
17:00
-1.8°C 4°C 5.3°C - 96% 0.35kPa
18:00
-2.1°C 4°C 4.8°C - 54% 0.33kPa
19:00
-2.7°C 3.9°C 3.5°C - 50% 0.28kPa
20:00
-1.8°C 3.9°C 2.8°C - 100% 0.21kPa
21:00 ☾
-0.6°C 3.8°C 2.5°C - 100% 0.15kPa
22:00 ☾
-0.4°C 3.7°C 2.6°C - 100% 0.14kPa
23:00 ☾
0.9°C 3.6°C 1.3°C - 100% 0.02kPa
Sat, Apr 11 Sunrise 06:25 Sunset 20:15
24:00 ☾
1.1°C 3.5°C 1.8°C - 100% 0.03kPa
01:00 ☾
1.2°C 3.4°C 1.6°C - 100% 0.02kPa
02:00 ☾
1°C 3.3°C 1.2°C - 100% 0.01kPa
03:00 ☾
1.3°C 3.2°C 1.5°C - 100% 0.01kPa
04:00 ☾
1.2°C 3.2°C 1.4°C - 100% 0.01kPa
05:00 ☾
0.6°C 3.1°C 1.3°C - 100% 0.03kPa
06:00 ☾
0°C 3°C 1.3°C - 100% 0.06kPa
07:00
-0.1°C 3°C 1.3°C - 100% 0.06kPa
08:00
-0.4°C 3.9°C 3.4°C - 68% 0.18kPa
09:00
-1.2°C 4.9°C 5.4°C - 36% 0.34kPa
10:00
-2.8°C 5.9°C 7.5°C - 4% 0.54kPa
11:00
-1.3°C 5.9°C 6.8°C - 36% 0.43kPa
12:00
-0.1°C 6°C 6.1°C - 68% 0.34kPa
13:00
0.8°C 6.1°C 5.4°C - 100% 0.25kPa
14:00
1.5°C 6°C 4.9°C - 100% 0.18kPa
15:00
2.2°C 5.9°C 4.3°C - 100% 0.12kPa
16:00
2.7°C 5.8°C 3.8°C - 100% 0.06kPa
17:00
2.9°C 5.8°C 4.5°C - 100% 0.09kPa
18:00
3.2°C 5.7°C 5.1°C - 100% 0.11kPa
19:00
3.4°C 5.6°C 5.8°C - 100% 0.14kPa
20:00
3.5°C 5.6°C 5.7°C - 100% 0.13kPa
21:00 ☾
3.6°C 5.6°C 5.6°C - 100% 0.12kPa
22:00 ☾
3.7°C 5.5°C 5.5°C - 100% 0.11kPa
23:00 ☾
3.1°C 5.5°C 4.7°C - 100% 0.09kPa
Sun, Apr 12 Sunrise 06:23 Sunset 20:17
24:00 ☾
2.5°C 5.4°C 3.9°C - 100% 0.08kPa
01:00 ☾
1.9°C 5.3°C 3.1°C - 100% 0.06kPa
02:00 ☾
2.6°C 5.2°C 3.7°C - 100% 0.06kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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