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Rule Morning Frost

Asheville - Morning Frost - Smoky Mountains & Blue Ridge

Asheville, 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

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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 36% failing

Currently

Real-time conditions
Soil Temperature20.7°C
Dew Point17.9°C (high dew point)
Wind Speed1.6m/s (calm conditions)
Cloud Cover0%

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.

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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
America/New_York
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Tue, Jul 7
09:000%0.77m/s
10:000%0.56m/s
11:000%0.6m/s
12:000%0.33m/s
13:000%0.65m/s
14:000%0.98m/s
15:000%2m/s
16:000%0.87m/s
17:000%0.86m/s
18:000%1.3m/s
19:000%1.5m/s
20:000%1.5m/s
21:000%1.1m/s
22:000%1.4m/s
23:000%1.3m/s
Wed, Jul 8
24:000%1.4m/s
01:000%1.3m/s
02:000%1.3m/s
03:000%1.2m/s
04:000%1.3m/s
05:000%1.3m/s
06:000%1.2m/s
07:000%1.2m/s
08:000%1.1m/s
09:000%1.4m/s
10:000%1.6m/s
11:000%1.6m/s
12:000%1.2m/s
13:000%0.68m/s
14:000%0.14m/s
15:000%1.7m/s
16:000%3.5m/s
17:000%3.6m/s
18:000%3.9m/s
19:000%3.1m/s
20:000%1.6m/s
21:000%1.2m/s
22:000%1.2m/s
23:000%1m/s
Thu, Jul 9
24:000%1.1m/s
01:000%0.93m/s
02:000%0.92m/s
03:000%1.3m/s
04:000%1.4m/s
05:000%1.4m/s
06:000%1.3m/s
07:000%1.2m/s
08:000%1.1m/s
09:000%0.92m/s
10:000%1.3m/s
11:000%2.1m/s
12:000%2.2m/s
13:000%3.2m/s
14:000%2.6m/s
15:000%2.9m/s
16:000%2.8m/s
17:000%2.2m/s
18:000%0.62m/s
19:000%0.89m/s
20:000%1m/s
21:000%0.71m/s
22:000%1.1m/s
23:000%1.2m/s
Fri, Jul 10
24:000%0.95m/s
01:000%1.2m/s
02:000%0.77m/s
03:000%0.72m/s
04:000%0.83m/s
05:000%0.26m/s
06:000%0.83m/s
07:000%1m/s
08:000%0.67m/s
09:000%0.76m/s
10:000%2.5m/s
11:000%3.8m/s
12:000%3.8m/s
13:000%4.3m/s
14:000%3.8m/s
15:000%3m/s
16:000%2.2m/s
17:000%1.4m/s
18:000%1.5m/s
19:000%1.5m/s
20:000%1.6m/s
21:000%1.5m/s
22:000%1.4m/s
23:000%1.3m/s
Sat, Jul 11
24:000%1.2m/s
01:000%1.1m/s
02:000%0.95m/s
03:000%1.1m/s
04:000%1.2m/s
05:000%1.4m/s
06:000%2.3m/s
07:000%3.3m/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
Wed, Jul 8 Sunrise 06:22 Sunset 20:48
10:00
18°C 21°C 25°C - 0% 1.2kPa
11:00
17°C 21°C 28°C - 0% 1.9kPa
12:00
16°C 21°C 30°C - 7% 2.4kPa
13:00
16°C 21°C 32°C - 45% 2.9kPa
14:00
15°C 22°C 32°C - 84% 3.1kPa
15:00
15°C 22°C 31°C - 100% 2.9kPa
16:00
17°C 22°C 28°C - 96% 1.8kPa
17:00
17°C 22°C 27°C - 100% 1.7kPa
18:00
17°C 22°C 26°C - 35% 1.5kPa
19:00
18°C 22°C 27°C - 65% 1.6kPa
20:00
18°C 22°C 24°C - 32% 0.97kPa
21:00
18°C 22°C 22°C - 0% 0.68kPa
22:00
17°C 22°C 21°C - 0% 0.5kPa
23:00
17°C 22°C 20°C - 0% 0.39kPa
Thu, Jul 9 Sunrise 06:22 Sunset 20:48
24:00
17°C 22°C 19°C - 0% 0.29kPa
01:00
17°C 22°C 19°C - 0% 0.24kPa
02:00
16°C 22°C 18°C - 4% 0.2kPa
03:00
16°C 22°C 18°C - 0% 0.19kPa
04:00
16°C 21°C 17°C - 0% 0.14kPa
05:00
16°C 21°C 17°C - 0% 0.1kPa
06:00
16°C 21°C 16°C - 0% 0.09kPa
07:00
16°C 21°C 17°C - 0% 0.14kPa
08:00
17°C 21°C 20°C - 1% 0.45kPa
09:00
17°C 21°C 23°C - 2% 0.89kPa
10:00
17°C 21°C 26°C - 2% 1.4kPa
11:00
16°C 21°C 28°C - 5% 2kPa
12:00
15°C 21°C 30°C - 75% 2.6kPa
13:00
15°C 22°C 30°C - 100% 2.5kPa
14:00
16°C 22°C 29°C - 96% 2.1kPa
15:00
16°C 22°C 28°C - 90% 2kPa
16:00
17°C 22°C 28°C - 100% 2kPa
17:00
17°C 22°C 27°C - 86% 1.5kPa
18:00
18°C 22°C 26°C - 61% 1.4kPa
19:00
18°C 22°C 27°C - 81% 1.6kPa
20:00
18°C 23°C 25°C - 38% 1.1kPa
21:00
17°C 23°C 22°C - 0% 0.73kPa
22:00
17°C 22°C 21°C - 0% 0.53kPa
23:00
17°C 22°C 20°C - 0% 0.39kPa
Fri, Jul 10 Sunrise 06:23 Sunset 20:47
24:00
17°C 22°C 19°C - 5% 0.28kPa
01:00
16°C 22°C 18°C - 5% 0.23kPa
02:00
16°C 22°C 18°C - 13% 0.18kPa
03:00
16°C 22°C 17°C - 5% 0.16kPa
04:00
16°C 21°C 17°C - 0% 0.15kPa
05:00
16°C 21°C 17°C - 0% 0.15kPa
06:00
16°C 21°C 17°C - 14% 0.16kPa
07:00
16°C 21°C 17°C - 14% 0.2kPa
08:00
17°C 21°C 20°C - 5% 0.49kPa
09:00
17°C 21°C 24°C - 0% 1kPa
10:00
16°C 21°C 28°C - 1% 1.9kPa
11:00
16°C 21°C 30°C - 1% 2.4kPa
12:00
15°C 22°C 31°C - 12% 2.8kPa
13:00
14°C 22°C 32°C - 69% 3.2kPa
14:00
13°C 22°C 32°C - 25% 3.3kPa
15:00
17°C 22°C 28°C - 50% 1.9kPa
16:00
18°C 23°C 24°C - 75% 0.97kPa
17:00
18°C 23°C 20°C - 100% 0.32kPa
18:00
18°C 23°C 20°C - 100% 0.25kPa
19:00
18°C 23°C 20°C - 100% 0.19kPa
20:00
18°C 23°C 19°C - 100% 0.13kPa
21:00
19°C 22°C 19°C - 100% 0.1kPa
22:00
19°C 22°C 19°C - 100% 0.07kPa
23:00
19°C 22°C 19°C - 100% 0.04kPa
Sat, Jul 11 Sunrise 06:23 Sunset 20:47
24:00
19°C 22°C 19°C - 100% 0.06kPa
01:00
19°C 22°C 20°C - 100% 0.08kPa
02:00
20°C 22°C 20°C - 100% 0.1kPa
03:00
20°C 22°C 23°C - 100% 0.4kPa
04:00
20°C 22°C 25°C - 100% 0.79kPa
05:00
20°C 22°C 27°C - 100% 1.3kPa
06:00
20°C 22°C 26°C - 98% 1.1kPa
07:00
20°C 22°C 26°C - 96% 1kPa
08:00
20°C 22°C 25°C - 93% 0.9kPa
09:00
20°C 22°C 23°C - 96% 0.55kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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