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Rule Morning Frost

Pienza - Morning Frost - Tuscany

Q: What conditions does Morning Frost look for?

Time Window: Sunrise -45m to +90m. Frost Probability: ≥ 60.0%. Wind Speed: ≤ 1.5m/s

Pienza, 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 83% failing

Wind Speed 46% failing

Currently

Real-time conditions

Frost Probability

Soil Temperature11.2°C

Dew Point1.7°C (low dew point)

Wind Speed1.0m/s (calm conditions)

Cloud Cover0%

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 92 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
Wed, Apr 8
06:00	✓	0%	0.51m/s
07:00	✓	0%	0.65m/s
08:00	✓	0%	0.26m/s
09:00	✕	0%	0.26m/s
10:00	✕	0%	0.9m/s
11:00	✕	0%	1.8m/s
12:00	✕	0%	2.5m/s
13:00	✕	0%	2.9m/s
14:00	✕	0%	2.8m/s
15:00	✕	0%	2.8m/s
16:00	✕	0%	3.8m/s
17:00	✕	0%	4m/s
18:00	✕	0%	3.7m/s
19:00	✕	0%	2.7m/s
20:00	✕	0%	2.1m/s
21:00	✕	0%	1.9m/s
22:00	✕	0%	1.8m/s
23:00	✕	0%	1.5m/s
Thu, Apr 9
24:00	✕	0%	1.5m/s
01:00	✕	0%	1.2m/s
02:00	✕	0%	1m/s
03:00	✕	0%	0.98m/s
04:00	✕	0%	1m/s
05:00	✓	0%	1m/s
06:00	✓	0%	1m/s
07:00	✓	0%	0.87m/s
08:00	✓	0%	0.8m/s
09:00	✕	0%	1.3m/s
10:00	✕	0%	1.8m/s
11:00	✕	0%	1.8m/s
12:00	✕	0%	2.3m/s
13:00	✕	0%	2.5m/s
14:00	✕	0%	2.8m/s
15:00	✕	0%	2.8m/s
16:00	✕	0%	3.1m/s
17:00	✕	0%	3.8m/s
18:00	✕	0%	3.6m/s
19:00	✕	0%	3m/s
20:00	✕	0%	2.7m/s
21:00	✕	0%	2.3m/s
22:00	✕	0%	2.1m/s
23:00	✕	0%	1.9m/s
Fri, Apr 10
24:00	✕	0%	1.7m/s
01:00	✕	0%	1.3m/s
02:00	✕	0%	0.96m/s
03:00	✕	0%	0.5m/s
04:00	✕	0%	0.63m/s
05:00	✓	0%	0.75m/s
06:00	✓	0%	0.59m/s
07:00	✓	0%	0.6m/s
08:00	✓	0%	0.62m/s
09:00	✕	0%	0.69m/s
10:00	✕	0%	0.99m/s
11:00	✕	0%	1m/s
12:00	✕	0%	1.4m/s
13:00	✕	0%	2m/s
14:00	✕	0%	2.2m/s
15:00	✕	0%	2m/s
16:00	✕	0%	1.7m/s
17:00	✕	0%	1.5m/s
18:00	✕	0%	1.2m/s
19:00	✕	0%	1.1m/s
20:00	✕	0%	1.5m/s
21:00	✕	0%	1.8m/s
22:00	✕	0%	1.7m/s
23:00	✕	0%	1.3m/s
Sat, Apr 11
24:00	✕	0%	1.3m/s
01:00	✕	0%	1.1m/s
02:00	✕	0%	0.69m/s
03:00	✕	0%	0.35m/s
04:00	✕	0%	0.51m/s
05:00	✓	0%	0.92m/s
06:00	✓	0%	0.9m/s
07:00	✓	0%	0.92m/s
08:00	✓	0%	0.79m/s
09:00	✕	0%	1.6m/s
10:00	✕	0%	2.4m/s
11:00	✕	0%	3.2m/s
12:00	✕	0%	2.8m/s
13:00	✕	0%	2.5m/s
14:00	✕	0%	2.1m/s
15:00	✕	0%	1.8m/s
16:00	✕	0%	1.6m/s
17:00	✕	0%	1.3m/s
18:00	✕	0%	1.4m/s
19:00	✕	0%	1.6m/s
20:00	✕	0%	1.7m/s
21:00	✕	0%	1.5m/s
22:00	✕	0%	1.2m/s
23:00	✕	0%	0.98m/s
Sun, Apr 12
24:00	✕	0%	1m/s
01:00	✕	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
Thu, Apr 9 Sunrise 06:41 Sunset 19:48
04:00 ☾	1.7°C	11°C	8.9°C	-	0%	0.45kPa
05:00 ☾	1.7°C	11°C	8.6°C	-	0%	0.43kPa
06:00 ☾	1.7°C	11°C	8.2°C	-	0%	0.4kPa
07:00	2.3°C	10°C	8°C	-	0%	0.35kPa
08:00	4.4°C	10°C	10°C	-	0%	0.42kPa
09:00	4.8°C	10°C	13°C	-	0%	0.61kPa
10:00	5.5°C	11°C	15°C	-	0%	0.75kPa
11:00	5.9°C	11°C	16°C	-	3%	0.9kPa
12:00	6.2°C	12°C	17°C	-	0%	1kPa
13:00	6.9°C	12°C	18°C	-	0%	1.1kPa
14:00	7.4°C	13°C	19°C	-	0%	1.2kPa
15:00	7.7°C	13°C	20°C	-	0%	1.3kPa
16:00	8°C	14°C	21°C	-	3%	1.4kPa
17:00	8.3°C	14°C	20°C	-	1%	1.3kPa
18:00	9.4°C	14°C	19°C	-	0%	1kPa
19:00	9.3°C	14°C	16°C	-	0%	0.68kPa
20:00 ☾	6.9°C	14°C	13°C	-	0%	0.49kPa
21:00 ☾	6°C	14°C	12°C	-	0%	0.42kPa
22:00 ☾	5.3°C	13°C	11°C	-	2%	0.42kPa
23:00 ☾	4.4°C	13°C	11°C	-	0%	0.45kPa
Fri, Apr 10 Sunrise 06:41 Sunset 19:48
24:00 ☾	3.6°C	13°C	11°C	-	5%	0.48kPa
01:00 ☾	3.3°C	13°C	10°C	-	5%	0.48kPa
02:00 ☾	3.4°C	12°C	10°C	-	5%	0.46kPa
03:00 ☾	3.8°C	12°C	9.7°C	-	0%	0.4kPa
04:00 ☾	4.3°C	12°C	9.3°C	-	0%	0.34kPa
05:00 ☾	4.7°C	11°C	8.9°C	-	5%	0.28kPa
06:00 ☾	5.3°C	11°C	8.6°C	-	5%	0.23kPa
07:00	5.5°C	11°C	8.7°C	-	5%	0.22kPa
08:00	6.7°C	11°C	11°C	-	7%	0.34kPa
09:00	7.5°C	11°C	14°C	-	56%	0.52kPa
10:00	7.9°C	11°C	16°C	-	44%	0.71kPa
11:00	8.1°C	12°C	17°C	-	100%	0.87kPa
12:00	8.5°C	12°C	18°C	-	5%	1kPa
13:00	9°C	13°C	20°C	-	5%	1.1kPa
14:00	9°C	13°C	20°C	-	100%	1.2kPa
15:00	8.8°C	14°C	20°C	-	100%	1.3kPa
16:00	8.7°C	14°C	20°C	-	100%	1.3kPa
17:00	8.9°C	15°C	20°C	-	100%	1.2kPa
18:00	10°C	15°C	19°C	-	100%	0.96kPa
19:00	11°C	15°C	17°C	-	70%	0.59kPa
20:00 ☾	10°C	15°C	14°C	-	70%	0.37kPa
21:00 ☾	9.9°C	14°C	13°C	-	88%	0.27kPa
22:00 ☾	9.9°C	14°C	12°C	-	98%	0.2kPa
23:00 ☾	9.7°C	14°C	12°C	-	100%	0.16kPa
Sat, Apr 11 Sunrise 06:40 Sunset 19:49
24:00 ☾	9.4°C	14°C	11°C	-	100%	0.16kPa
01:00 ☾	9°C	13°C	11°C	-	67%	0.15kPa
02:00 ☾	8.7°C	13°C	10°C	-	79%	0.14kPa
03:00 ☾	8.5°C	13°C	10°C	-	30%	0.13kPa
04:00 ☾	8.2°C	12°C	9.8°C	-	42%	0.12kPa
05:00 ☾	8.1°C	12°C	9.6°C	-	6%	0.11kPa
06:00 ☾	7.8°C	12°C	9.4°C	-	31%	0.12kPa
07:00	7.9°C	12°C	9.5°C	-	7%	0.12kPa
08:00	8.9°C	11°C	12°C	-	11%	0.24kPa
09:00	9.9°C	13°C	14°C	-	39%	0.42kPa
10:00	11°C	14°C	17°C	-	67%	0.65kPa
11:00	11°C	15°C	19°C	-	95%	0.94kPa
12:00	11°C	15°C	18°C	-	93%	0.68kPa
13:00	11°C	15°C	16°C	-	92%	0.46kPa
14:00	11°C	15°C	14°C	-	90%	0.29kPa
15:00	11°C	15°C	13°C	-	65%	0.23kPa
16:00	10°C	15°C	12°C	-	39%	0.18kPa
17:00	9.5°C	15°C	11°C	-	13%	0.13kPa
18:00	9.1°C	14°C	11°C	-	10%	0.16kPa
19:00	8.7°C	14°C	11°C	-	8%	0.18kPa
20:00 ☾	8.3°C	14°C	11°C	-	5%	0.2kPa
21:00 ☾	8°C	13°C	11°C	-	37%	0.21kPa
22:00 ☾	7.8°C	13°C	10°C	-	68%	0.21kPa
23:00 ☾	7.5°C	13°C	10°C	-	100%	0.22kPa
Sun, Apr 12 Sunrise 06:38 Sunset 19:50
24:00 ☾	8°C	13°C	11°C	-	100%	0.24kPa
01:00 ☾	8.5°C	13°C	12°C	-	100%	0.27kPa
02:00 ☾	9°C	12°C	12°C	-	100%	0.29kPa
03:00 ☾	9.6°C	13°C	15°C	-	100%	0.47kPa

How to read: these inputs help produce the derived score; they are not requirements by themselves.

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