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Rule Morning Frost

Cappella della Madonna di Vitaleta - Morning Frost - Tuscany

San Quirico d'Orcia, Tuscany, Italy

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
Time Window 88% failing
Wind Speed 18% failing

Currently

Real-time conditions
Frost Probability
0%
Soil Temperature9.8°C
Dew Point6.4°C (moderate dew point)
Wind Speed1.8m/s (calm conditions)
Cloud Cover5%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Rome

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

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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/Rome
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sat, Feb 21
20:00✕0%0.61m/s
21:00✕5%0.71m/s
22:00✕4.9%0.82m/s
23:00✕4.4%0.91m/s
Sun, Feb 22
24:00✕3.6%1m/s
01:00✕3.6%1.4m/s
02:00✕3.6%1.1m/s
03:00✕3.6%1.3m/s
04:00✕3.6%1.3m/s
05:00✕37%1.3m/s
06:00✓37%1.2m/s
07:00✓22%1.4m/s
08:00✓29%1.3m/s
09:00✕50%1.1m/s
10:00✕5%0.88m/s
11:00✕4%1.2m/s
12:00✕3.3%0.82m/s
13:00✕0%1.1m/s
14:00✕0%2m/s
15:00✕0%2m/s
16:00✕0%2.2m/s
17:00✕0%1.7m/s
18:00✕0%1.7m/s
19:00✕0%1.9m/s
20:00✕0%1.8m/s
21:00✕0%2m/s
22:00✕0%1.7m/s
23:00✕0%1.6m/s
Mon, Feb 23
24:00✕0%1.2m/s
01:00✕0%1.3m/s
02:00✕0%1.4m/s
03:00✕0%1.3m/s
04:00✕0%1.2m/s
05:00✕0%1.5m/s
06:00✓1.8%1.5m/s
07:00✓1.8%1.5m/s
08:00✓2.1%1m/s
09:00✕3.7%0.59m/s
10:00✕0%0.93m/s
11:00✕0%1.3m/s
12:00✕0%1.4m/s
13:00✕0%1.7m/s
14:00✕0%1.8m/s
15:00✕0%1.8m/s
16:00✕0%1.5m/s
17:00✕0%1.5m/s
18:00✕0%1.3m/s
19:00✕0%1.1m/s
20:00✕0%1.3m/s
21:00✕0%0.09m/s
22:00✕0%0.3m/s
23:00✕0%0.75m/s
Tue, Feb 24
24:00✕0%0.64m/s
01:00✕0%0.45m/s
02:00✕0%0.25m/s
03:00✕0%0.51m/s
04:00✕0%0.69m/s
05:00✕0%0.72m/s
06:00✓3.3%0.8m/s
07:00✓3.5%0.75m/s
08:00✓3.8%0.49m/s
09:00✕5%0.34m/s
10:00✕0%0.66m/s
11:00✕0%1.4m/s
12:00✕0%1.7m/s
13:00✕0%1.7m/s
14:00✕0%1.5m/s
15:00✕0%1.1m/s
16:00✕0%0.71m/s
17:00✕0%0.22m/s
18:00✕0%0.25m/s
19:00✕0%0.64m/s
20:00✕0%0.49m/s
21:00✕0%0.2m/s
22:00✕0%0.22m/s
23:00✕0%0.45m/s
Wed, Feb 25
24:00✕0%0.64m/s
01:00✕0%0.9m/s
02:00✕0%1.1m/s
03:00✕0%1.3m/s
04:00✕0%1.5m/s
05:00✕0%1.5m/s
06:00✓0%1.4m/s
07:00✓0%1.3m/s
08:00✓0%1.1m/s
09:00✕0%0.87m/s
10:00✕0%0.64m/s
11:00✕0%0.72m/s
12:00✕0%0.8m/s
13:00✕0%0.87m/s
14:00✕0%0.88m/s
15:00✕0%0.88m/s
16:00✕0%0.88m/s
17:00✕0%0.96m/s
18:00✕0%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/Rome
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, Feb 22 Sunrise 07:01 Sunset 17:53
20:00 ☾
6.4°C 9.8°C 8.3°C - 5% 0.13kPa
21:00 ☾
6°C 9.5°C 7.9°C - 5% 0.13kPa
22:00 ☾
5.3°C 9.2°C 7.6°C - 5% 0.15kPa
23:00 ☾
4.4°C 8.9°C 7.3°C - 5% 0.18kPa
Mon, Feb 23 Sunrise 07:01 Sunset 17:53
24:00 ☾
4°C 8.6°C 7°C - 16% 0.18kPa
01:00 ☾
4.5°C 8.4°C 6.7°C - 34% 0.13kPa
02:00 ☾
5.4°C 8.1°C 7.2°C - 67% 0.12kPa
03:00 ☾
6.3°C 8.1°C 8.1°C - 97% 0.12kPa
04:00 ☾
6.7°C 8.1°C 8.2°C - 93% 0.11kPa
05:00 ☾
6.9°C 8°C 8.3°C - 100% 0.1kPa
06:00 ☾
6.8°C 8°C 8.1°C - 100% 0.09kPa
07:00
6.3°C 7.9°C 7.4°C - 100% 0.08kPa
08:00
6.6°C 7.8°C 8.3°C - 100% 0.12kPa
09:00
6.9°C 7.9°C 10°C - 73% 0.24kPa
10:00
6.9°C 8.3°C 12°C - 5% 0.38kPa
11:00
6.7°C 8.9°C 13°C - 5% 0.52kPa
12:00
6.5°C 9.6°C 14°C - 40% 0.65kPa
13:00
6.5°C 10°C 15°C - 24% 0.72kPa
14:00
6.5°C 11°C 15°C - 100% 0.74kPa
15:00
6.5°C 11°C 15°C - 100% 0.68kPa
16:00
6.8°C 11°C 14°C - 46% 0.61kPa
17:00
7.9°C 11°C 13°C - 29% 0.43kPa
18:00 ☾
6.8°C 11°C 11°C - 34% 0.29kPa
19:00 ☾
6.6°C 11°C 9.9°C - 36% 0.24kPa
20:00 ☾
6.6°C 11°C 9.4°C - 5% 0.2kPa
21:00 ☾
6.6°C 11°C 8.6°C - 4% 0.14kPa
22:00 ☾
6.4°C 10°C 7.9°C - 12% 0.1kPa
23:00 ☾
6.3°C 9.8°C 7.7°C - 9% 0.1kPa
Tue, Feb 24 Sunrise 06:59 Sunset 17:54
24:00 ☾
6.2°C 9.5°C 7.5°C - 5% 0.09kPa
01:00 ☾
5.9°C 9.2°C 7.1°C - 6% 0.08kPa
02:00 ☾
5.7°C 8.9°C 6.8°C - 7% 0.07kPa
03:00 ☾
5.6°C 8.6°C 6.6°C - 4% 0.07kPa
04:00 ☾
5.5°C 8.3°C 6.5°C - 9% 0.07kPa
05:00 ☾
5.4°C 8°C 6.5°C - 5% 0.07kPa
06:00 ☾
5.3°C 7.8°C 6.5°C - 5% 0.07kPa
07:00
5.2°C 7.5°C 6.4°C - 5% 0.08kPa
08:00
6.1°C 7.4°C 7.7°C - 5% 0.11kPa
09:00
6.8°C 7.6°C 9.9°C - 5% 0.23kPa
10:00
7.2°C 8.1°C 12°C - 5% 0.35kPa
11:00
7.2°C 8.7°C 13°C - 6% 0.47kPa
12:00
7.2°C 9.5°C 14°C - 57% 0.56kPa
13:00
7.2°C 10°C 14°C - 80% 0.63kPa
14:00
7.2°C 11°C 15°C - 56% 0.67kPa
15:00
7.2°C 11°C 15°C - 88% 0.67kPa
16:00
7.4°C 12°C 15°C - 100% 0.63kPa
17:00
8.5°C 12°C 13°C - 81% 0.43kPa
18:00 ☾
7.6°C 12°C 11°C - 45% 0.29kPa
19:00 ☾
7.5°C 11°C 11°C - 41% 0.24kPa
20:00 ☾
7.5°C 11°C 10°C - 38% 0.19kPa
21:00 ☾
7.4°C 11°C 9.4°C - 10% 0.15kPa
22:00 ☾
7°C 10°C 8.6°C - 0% 0.11kPa
23:00 ☾
6.7°C 10°C 8.1°C - 0% 0.1kPa
Wed, Feb 25 Sunrise 06:58 Sunset 17:56
24:00 ☾
6.5°C 9.8°C 7.8°C - 0% 0.09kPa
01:00 ☾
6.3°C 9.4°C 7.6°C - 0% 0.09kPa
02:00 ☾
6.9°C 9.1°C 9.1°C - 0% 0.16kPa
03:00 ☾
7.4°C 8.8°C 11°C - 0% 0.25kPa
04:00 ☾
7.8°C 8.5°C 12°C - 0% 0.35kPa
05:00 ☾
8°C 9.2°C 13°C - 5% 0.44kPa
06:00 ☾
8.2°C 9.8°C 14°C - 10% 0.54kPa
07:00
8.3°C 10°C 15°C - 16% 0.65kPa
08:00
8.3°C 11°C 15°C - 34% 0.64kPa
09:00
8.4°C 11°C 15°C - 53% 0.64kPa
10:00
8.4°C 12°C 15°C - 72% 0.63kPa
11:00
8.6°C 12°C 14°C - 79% 0.52kPa
12:00
8.7°C 12°C 13°C - 86% 0.41kPa
13:00
8.7°C 12°C 12°C - 92% 0.32kPa
14:00
8.6°C 12°C 12°C - 81% 0.29kPa
15:00
8.4°C 12°C 12°C - 71% 0.26kPa
16:00
8.3°C 11°C 11°C - 60% 0.24kPa
17:00
8.1°C 11°C 11°C - 48% 0.21kPa
18:00 ☾
7.9°C 11°C 10°C - 36% 0.18kPa
19:00 ☾
7.6°C 11°C 9.6°C - 25% 0.15kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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