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Rule Morning Frost

Morning Frost Forecast for Sylva, Smoky Mountains & Blue Ridge

Sylva, North Carolina, United States

Sylva's courthouse-topped main street sits in a narrow wooded valley, with nearby ridgelines and the southern Blue Ridge Parkway adding elevation.

Currently

Real-time conditions
Soil Temperature20.8°C
Dew Point10.8°C (moderate dew point)
Wind Speed4.0m/s (calm conditions)
Cloud Cover5%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (86-hour forecast)

  • Frost Probability100% of hours
  • Time Window88% of hours
  • Wind Speed33% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Smoky Mountains & Blue Ridge. The requirements and hourly values below show how those signals apply at Sylva.

Explore Morning Frost conditions across Smoky Mountains & Blue Ridge →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Sylva during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
12
recorded matching windows · 64% average confidence
Most represented month

February, with 9 of 12 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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86-hour requirements breakdown

When available, the detailed table below covers only the stated 86-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
0matching hours in the next 86 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sat, Aug 22
24:000%1.1m/s
01:000%0.84m/s
02:000%0.73m/s
03:000%0.78m/s
04:000%0.83m/s
05:000%0.37m/s
06:000%0.35m/s
07:000%0.29m/s
08:000%0.61m/s
09:000%0.96m/s
10:000%1.3m/s
11:000%1.6m/s
12:000%1.9m/s
13:000%2.1m/s
14:000%2.2m/s
15:000%2.7m/s
16:000%4m/s
17:000%5.2m/s
18:000%4.7m/s
19:000%3.5m/s
20:000%1.6m/s
21:000%0.22m/s
22:000%0.69m/s
23:000%0.59m/s
Sun, Aug 23
24:000%0.13m/s
01:000%0.57m/s
02:000%0.6m/s
03:000%1m/s
04:000%1.2m/s
05:000%0.97m/s
06:000%1.1m/s
07:000%0.92m/s
08:000%0.9m/s
09:000%1.2m/s
10:000%1.7m/s
11:000%2.5m/s
12:000%3.4m/s
13:000%4m/s
14:000%4.1m/s
15:000%4.3m/s
16:000%4.3m/s
17:000%4m/s
18:000%3.4m/s
19:000%2.9m/s
20:000%1.3m/s
21:000%0.68m/s
22:000%0.82m/s
23:000%0.71m/s
Mon, Aug 24
24:000%0.73m/s
01:000%0.68m/s
02:000%1.3m/s
03:000%1m/s
04:000%1m/s
05:000%0.92m/s
06:000%0.8m/s
07:000%1.1m/s
08:000%1m/s
09:000%0.94m/s
10:000%0.81m/s
11:000%1.3m/s
12:000%1.4m/s
13:000%1.7m/s
14:000%1.8m/s
15:000%1.5m/s
16:000%1.6m/s
17:000%2.2m/s
18:000%2.4m/s
19:000%1.6m/s
20:000%1m/s
21:000%0.98m/s
22:000%0.96m/s
23:000%0.94m/s
Tue, Aug 25
24:000%0.98m/s
01:000%1m/s
02:000%1.1m/s
03:000%0.77m/s
04:000%0.48m/s
05:000%0.2m/s
06:000%0.49m/s
07:000%0.78m/s
08:000%1.1m/s
09:000%1.1m/s
10:000%1.1m/s
11:000%1.2m/s
12:000%1.1m/s
13:000%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
America/New_York
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sat, Aug 22 Sunrise 06:58 Sunset 20:12
16:00
11°C 21°C 29°C - 5% 2.7kPa
17:00
11°C 21°C 28°C - 0% 2.4kPa
18:00
14°C 21°C 26°C - 0% 1.8kPa
19:00
15°C 21°C 24°C - 0% 1.2kPa
20:00
16°C 21°C 20°C - 0% 0.56kPa
21:00
15°C 21°C 19°C - 0% 0.47kPa
22:00
15°C 21°C 18°C - 0% 0.35kPa
23:00
15°C 21°C 17°C - 0% 0.24kPa
Sun, Aug 23 Sunrise 06:58 Sunset 20:11
24:00
15°C 21°C 16°C - 0% 0.16kPa
01:00
15°C 20°C 16°C - 0% 0.11kPa
02:00
15°C 20°C 16°C - 0% 0.09kPa
03:00
15°C 20°C 15°C - 2% 0.07kPa
04:00
15°C 20°C 15°C - 2% 0.05kPa
05:00
14°C 20°C 15°C - 0% 0.05kPa
06:00
14°C 20°C 14°C - 1% 0.04kPa
07:00
14°C 19°C 14°C - 3% 0.04kPa
08:00
15°C 19°C 15°C - 7% 0.07kPa
09:00
16°C 19°C 18°C - 2% 0.27kPa
10:00
15°C 19°C 21°C - 0% 0.76kPa
11:00
11°C 19°C 23°C - 0% 1.5kPa
12:00
8.2°C 19°C 24°C - 0% 2kPa
13:00
5.9°C 20°C 26°C - 0% 2.4kPa
14:00
4.3°C 20°C 26°C - 0% 2.6kPa
15:00
3.1°C 20°C 26°C - 0% 2.7kPa
16:00
3.9°C 20°C 26°C - 0% 2.6kPa
17:00
5.6°C 20°C 25°C - 0% 2.3kPa
18:00
8.8°C 20°C 24°C - 5% 1.8kPa
19:00
11°C 20°C 21°C - 53% 1.2kPa
20:00
11°C 20°C 17°C - 5% 0.62kPa
21:00
9.8°C 20°C 15°C - 94% 0.49kPa
22:00
9.5°C 20°C 14°C - 54% 0.44kPa
23:00
9.4°C 20°C 13°C - 100% 0.36kPa
Mon, Aug 24 Sunrise 06:59 Sunset 20:10
24:00
9.2°C 19°C 13°C - 84% 0.36kPa
01:00
9°C 19°C 13°C - 68% 0.33kPa
02:00
8.8°C 19°C 13°C - 100% 0.32kPa
03:00
8.7°C 19°C 12°C - 89% 0.26kPa
04:00
8.5°C 19°C 12°C - 100% 0.25kPa
05:00
8.6°C 18°C 11°C - 100% 0.23kPa
06:00
8.6°C 18°C 11°C - 100% 0.2kPa
07:00
8.6°C 18°C 11°C - 62% 0.2kPa
08:00
9.7°C 18°C 13°C - 83% 0.29kPa
09:00
10°C 18°C 17°C - 59% 0.65kPa
10:00
11°C 18°C 20°C - 61% 1.1kPa
11:00
9.7°C 18°C 22°C - 84% 1.5kPa
12:00
8°C 18°C 24°C - 59% 1.9kPa
13:00
6.5°C 18°C 25°C - 96% 2.3kPa
14:00
6°C 18°C 26°C - 35% 2.4kPa
15:00
5.9°C 19°C 27°C - 86% 2.6kPa
16:00
5.8°C 19°C 27°C - 100% 2.6kPa
17:00
6.3°C 19°C 26°C - 42% 2.5kPa
18:00
9.3°C 19°C 25°C - 92% 2kPa
19:00
13°C 19°C 21°C - 10% 1.1kPa
20:00
11°C 19°C 17°C - 100% 0.62kPa
21:00
10°C 19°C 16°C - 74% 0.56kPa
22:00
8.7°C 18°C 14°C - 48% 0.5kPa
23:00
7.4°C 18°C 13°C - 22% 0.45kPa
Tue, Aug 25 Sunrise 07:00 Sunset 20:09
24:00
8.1°C 18°C 14°C - 45% 0.49kPa
01:00
8.7°C 17°C 15°C - 69% 0.54kPa
02:00
9.4°C 17°C 16°C - 93% 0.58kPa
03:00
9.8°C 17°C 17°C - 87% 0.75kPa
04:00
10°C 17°C 19°C - 82% 0.94kPa
05:00
10°C 17°C 21°C - 76% 1.2kPa
06:00
10°C 18°C 22°C - 79% 1.4kPa
07:00
9.7°C 18°C 24°C - 82% 1.7kPa
08:00
9.1°C 18°C 25°C - 85% 2kPa
09:00
9.5°C 18°C 24°C - 84% 1.9kPa
10:00
9.9°C 18°C 24°C - 84% 1.7kPa
11:00
10°C 18°C 23°C - 83% 1.6kPa
12:00
11°C 18°C 21°C - 56% 1.1kPa
13:00
12°C 18°C 19°C - 28% 0.75kPa
14:00
12°C 18°C 16°C - 0% 0.45kPa
15:00
12°C 18°C 16°C - 34% 0.41kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

Forecast generated

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