Skip to content
✨ New: PhotoWeather is now available on iOS and Android
Rule Morning Frost

Sylva - Morning Frost - Smoky Mountains & Blue Ridge

Sylva, North Carolina, United States

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
Time Window 88% failing
Wind Speed 78% failing

Currently

Real-time conditions
Soil Temperature14.3°C
Dew Point3.6°C (low dew point)
Wind Speed2.1m/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 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 predicts the first hard frost events that enhance the Smokies' autumn landscapes with crystalline textures. We track overnight temperatures, humidity, and elevation to identify when frost will coat mountain meadows, overlooks, and exposed vegetation with sparkling ice crystals at dawn.

The Smokies' elevation range means frost arrives at different times depending on altitude. Clingmans Dome and high overlooks can see frost as early as late September, while valleys may not freeze until late October or November. This staggered frost timing extends the season for frost photography and creates interesting elevation-based opportunities.

What makes Smoky Mountains frost photography exceptional:

  • Mountain meadows - High-elevation grassy areas like Andrews Bald develop heavy frost coverage on clear nights
  • Clingmans Dome conditions - At 6,643 feet, the highest point often experiences hoar frost creating alien landscapes
  • Frozen waterfalls - Later season frost leads to ice formations on the Smokies' countless waterfalls
  • Foliage combination - Early season frost can coincide with peak color, coating colorful leaves with ice crystals

Best frost photography requires clear, calm nights with temperatures dropping into the mid-20s Fahrenheit. High elevation locations experience frost most reliably, while valley locations need colder conditions. Arrive before dawn to catch frost plus first light—frost melts quickly after sunrise. Classic locations include Clingmans Dome observation tower, Grassy patches along Appalachian Trail, and roadside overlooks above 5,000 feet elevation.

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 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, Apr 11
24:000%0.85m/s
01:000%0.76m/s
02:000%1m/s
03:000%0.85m/s
04:000%0.9m/s
05:000%0.84m/s
06:000%0.92m/s
07:000%0.96m/s
08:000%0.98m/s
09:000%0.84m/s
10:000%0.91m/s
11:000%1.3m/s
12:000%1.6m/s
13:000%1.4m/s
14:000%1.5m/s
15:000%2.1m/s
16:000%2.2m/s
17:000%2.1m/s
18:000%1.1m/s
19:000%1m/s
20:000%1.4m/s
21:000%1.2m/s
22:000%1m/s
23:000%1.1m/s
Sun, Apr 12
24:000%1.2m/s
01:000%1.1m/s
02:000%1.2m/s
03:000%1.1m/s
04:000%1.1m/s
05:000%1.3m/s
06:000%1.6m/s
07:000%1.6m/s
08:000%1.6m/s
09:000%1.2m/s
10:000%1.6m/s
11:000%2.4m/s
12:000%3.3m/s
13:000%4m/s
14:000%4.1m/s
15:000%4.1m/s
16:000%3.9m/s
17:000%3.9m/s
18:000%3.7m/s
19:000%3.1m/s
20:000%2.2m/s
21:000%2m/s
22:000%2.1m/s
23:000%2.4m/s
Mon, Apr 13
24:000%2.1m/s
01:000%1.9m/s
02:000%2.2m/s
03:000%2.3m/s
04:000%2m/s
05:000%1.9m/s
06:000%1.9m/s
07:000%1.6m/s
08:000%1.3m/s
09:000%1.3m/s
10:000%1.8m/s
11:000%2.1m/s
12:000%3.1m/s
13:000%4.2m/s
14:000%3.7m/s
15:000%3.4m/s
16:000%2.9m/s
17:000%2.7m/s
18:000%2.6m/s
19:000%1.5m/s
20:000%1.5m/s
21:000%1.7m/s
22:000%2m/s
23:000%2.3m/s
Tue, Apr 14
24:000%2.3m/s
01:000%2.2m/s
02:000%2.2m/s
03:000%2.3m/s
04:000%2.4m/s
05:000%2.5m/s
06:000%2.6m/s
07:000%2.7m/s
08:000%2.8m/s
09:000%2.8m/s
10:000%2.9m/s
11:000%2.9m/s
12:000%2.6m/s
13:000%2.3m/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, Apr 11 Sunrise 07:05 Sunset 20:01
15:00
3.6°C 14°C 23°C - 5% 2.1kPa
16:00
3.2°C 15°C 23°C - 3% 2.1kPa
17:00
3.2°C 15°C 23°C - 34% 2kPa
18:00
4°C 16°C 22°C - 59% 1.9kPa
19:00
7.9°C 16°C 19°C - 69% 1.1kPa
20:00
8.1°C 16°C 16°C - 64% 0.7kPa
21:00
7.8°C 15°C 14°C - 62% 0.54kPa
22:00
7.6°C 15°C 14°C - 48% 0.54kPa
23:00
7.3°C 15°C 13°C - 4% 0.49kPa
Sun, Apr 12 Sunrise 07:04 Sunset 20:02
24:00
6.9°C 15°C 12°C - 3% 0.41kPa
01:00
6.4°C 15°C 12°C - 3% 0.41kPa
02:00
5.9°C 14°C 11°C - 9% 0.42kPa
03:00
5.3°C 14°C 11°C - 39% 0.44kPa
04:00
4.9°C 14°C 11°C - 76% 0.46kPa
05:00
4.6°C 13°C 11°C - 90% 0.44kPa
06:00
4.5°C 13°C 11°C - 20% 0.44kPa
07:00
4.7°C 13°C 10°C - 3% 0.38kPa
08:00
6.2°C 13°C 12°C - 2% 0.41kPa
09:00
7.1°C 13°C 15°C - 5% 0.74kPa
10:00
7.1°C 13°C 18°C - 18% 1.1kPa
11:00
7°C 14°C 20°C - 20% 1.3kPa
12:00
7°C 14°C 21°C - 5% 1.5kPa
13:00
7°C 15°C 22°C - 5% 1.6kPa
14:00
6.9°C 15°C 22°C - 5% 1.6kPa
15:00
6.9°C 15°C 22°C - 11% 1.6kPa
16:00
6.7°C 16°C 22°C - 12% 1.7kPa
17:00
6.6°C 16°C 21°C - 15% 1.6kPa
18:00
7°C 16°C 20°C - 22% 1.4kPa
19:00
8.3°C 16°C 19°C - 100% 1.1kPa
20:00
8.3°C 16°C 15°C - 92% 0.62kPa
21:00
7.9°C 16°C 14°C - 6% 0.48kPa
22:00
7.5°C 16°C 13°C - 42% 0.44kPa
23:00
7.4°C 15°C 12°C - 74% 0.4kPa
Mon, Apr 13 Sunrise 07:03 Sunset 20:03
24:00
7.8°C 15°C 12°C - 68% 0.34kPa
01:00
7.7°C 15°C 12°C - 100% 0.32kPa
02:00
7.6°C 15°C 12°C - 100% 0.31kPa
03:00
7.7°C 14°C 11°C - 100% 0.29kPa
04:00
8°C 14°C 11°C - 100% 0.22kPa
05:00
8.1°C 14°C 10°C - 100% 0.17kPa
06:00
8.2°C 14°C 9.9°C - 100% 0.13kPa
07:00
8.2°C 13°C 9.5°C - 100% 0.1kPa
08:00
8.6°C 13°C 11°C - 100% 0.21kPa
09:00
8.7°C 13°C 14°C - 100% 0.47kPa
10:00
8.4°C 13°C 16°C - 100% 0.76kPa
11:00
7.6°C 14°C 18°C - 100% 1.1kPa
12:00
6.4°C 14°C 20°C - 100% 1.3kPa
13:00
6°C 14°C 20°C - 100% 1.4kPa
14:00
6.5°C 14°C 19°C - 100% 1.2kPa
15:00
6.1°C 15°C 19°C - 100% 1.3kPa
16:00
5.7°C 15°C 19°C - 100% 1.3kPa
17:00
6°C 15°C 20°C - 100% 1.3kPa
18:00
7.4°C 15°C 19°C - 100% 1.1kPa
19:00
8.9°C 15°C 17°C - 100% 0.76kPa
20:00
8.2°C 15°C 14°C - 98% 0.55kPa
21:00
7.8°C 14°C 13°C - 74% 0.45kPa
22:00
7.4°C 14°C 12°C - 51% 0.36kPa
23:00
6.9°C 13°C 11°C - 27% 0.28kPa
Tue, Apr 14 Sunrise 07:01 Sunset 20:04
24:00
7.2°C 13°C 11°C - 52% 0.28kPa
01:00
7.5°C 13°C 11°C - 76% 0.29kPa
02:00
7.8°C 12°C 11°C - 100% 0.3kPa
03:00
8.3°C 13°C 14°C - 88% 0.49kPa
04:00
8.6°C 13°C 16°C - 75% 0.73kPa
05:00
8.6°C 13°C 19°C - 62% 1kPa
06:00
8.9°C 14°C 20°C - 49% 1.2kPa
07:00
9.2°C 14°C 21°C - 36% 1.4kPa
08:00
9.5°C 15°C 22°C - 22% 1.5kPa
09:00
9.5°C 15°C 22°C - 35% 1.5kPa
10:00
9.5°C 16°C 22°C - 47% 1.5kPa
11:00
9.5°C 16°C 22°C - 60% 1.5kPa
12:00
10°C 16°C 20°C - 49% 1.1kPa
13:00
10°C 17°C 18°C - 38% 0.82kPa
14:00
10°C 17°C 16°C - 27% 0.56kPa
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