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Rule Fog Hunter

Ninh Binh - Fog Hunter - Vietnam

Ninh Bình, Ninh Bình Province, Vietnam

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread3.5°C
Visibility24135 (Clear)
Relative Humidity82%
Wind Speed2.4m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Bangkok

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 when temperature inversions and morning mist create atmospheric conditions across Vietnam's mountain valleys, rice terraces, and karst landscapes. We track overnight cooling, humidity, topography, and seasonal patterns to identify when fog transforms Vietnam's highland regions into ethereal scenes.

Vietnam's dramatic elevation changes—from sea level to 10,000-foot peaks—create ideal conditions for fog formation in mountain valleys. Northern highlands around Sapa and Mu Cang Chai experience frequent morning fog, particularly during the transition between dry and wet seasons. Hill stations like Da Lat maintain cooler temperatures that promote mist formation even in tropical latitudes. The limestone karsts of Ha Long Bay and Ninh Binh develop ethereal fog conditions during cooler months.

What makes Vietnam fog photography special:

  • Terraced valleys - Sapa and Mu Cang Chai rice terraces emerge layer by layer as fog burns off, creating depth and mystery
  • Karst landscapes - Ha Long Bay limestone islands pierce through low-lying fog like ancient towers floating on clouds
  • Mountain village life - Traditional H'mong and Dao villages in Sapa appear and disappear through drifting mist during morning hours
  • Highland agriculture - Da Lat's flower farms and strawberry fields gain dreamlike quality under morning fog blankets

Sapa experiences its most reliable fog from September through November and March through May—transition seasons when temperature differentials are greatest. Early morning (5-8 AM) provides peak conditions as fog fills valleys while higher villages remain clear. Mu Cang Chai's deep valleys create spectacular inversions, especially during harvest season (late September) when golden rice terraces emerge through fog layers. Da Lat's elevation (1,500 meters) generates morning mist year-round, peaking December through March. Ninh Binh's karsts become most atmospheric during cooler months (November-February) when mist drifts through limestone formations. Arrive at viewpoints well before dawn—fog often dissipates quickly after sunrise.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Bangkok
Fog Probability
≥ 75.0%
Wed, Jul 8
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Thu, Jul 9
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Fri, Jul 10
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Sat, Jul 11
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog 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
Asia/Bangkok
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Wed, Jul 8 Sunrise 05:22 Sunset 18:39
21:00 ☾
3% 25°C 0mm 82% 0cm -29° 28°C 0.19mm 0.69kPa 24135m 5.4m/s 2.4m/s
22:00 ☾
4% 25°C 0mm 82% 0cm -38° 28°C 0.19mm 0.7kPa 24135m 4.7m/s 1.7m/s
23:00 ☾
3% 24°C 0mm 84% 0cm -45° 27°C 0.75mm 0.55kPa 12501m 6m/s 2m/s
Thu, Jul 9 Sunrise 05:22 Sunset 18:39
24:00 ☾
2% 24°C 0mm 88% 0cm -47° 26°C 1.6mm 0.39kPa 20961m 3.3m/s 1.3m/s
01:00 ☾
1% 25°C 0mm 88% 0cm -45° 27°C 1.7mm 0.41kPa 24134m 1.1m/s 0.58m/s
02:00 ☾
5% 25°C 0mm 88% 0cm -38° 27°C 0.19mm 0.41kPa 24134m 0.9m/s 0.78m/s
03:00 ☾
10% 25°C 0mm 88% 0cm -29° 27°C 0.19mm 0.4kPa 24134m 1.5m/s 1.4m/s
04:00 ☾
14% 25°C 0mm 88% 0cm -18° 27°C 0.19mm 0.4kPa 24135m 1.2m/s 1.2m/s
05:00 ☾
15% 25°C 0mm 89% 0cm -5.5° 27°C 0.19mm 0.4kPa 24134m 1m/s 0.94m/s
06:00 ☾
15% 25°C 0mm 87% 0cm 7.4° 27°C 0.19mm 0.47kPa 24134m 1.3m/s 1.1m/s
07:00
16% 25°C 0mm 81% 0cm 21° 28°C 0.19mm 0.75kPa 24135m 1.7m/s 1.5m/s
08:00
22% 25°C 0mm 73% 0cm 34° 30°C 0mm 1.1kPa 24135m 1.7m/s 1.6m/s
09:00
27% 25°C 0mm 65% 0cm 48° 32°C 0mm 1.6kPa 24135m 1.6m/s 1.3m/s
10:00
33% 25°C 0mm 59% 0cm 62° 34°C 0mm 2.2kPa 24134m 1.8m/s 1.2m/s
11:00
29% 24°C 0mm 53% 0cm 76° 35°C 0mm 2.6kPa 24134m 2.2m/s 1.6m/s
12:00
25% 24°C 0mm 49% 0cm 88° 36°C 0mm 3kPa 24134m 2.2m/s 1.4m/s
13:00
21% 23°C 0mm 46% 0cm 76° 37°C 0mm 3.4kPa 24135m 2.2m/s 0.99m/s
14:00
17% 23°C 0mm 45% 0cm 62° 37°C 0mm 3.5kPa 21108m 2.4m/s 0.91m/s
15:00
12% 24°C 0mm 51% 0cm 48° 35°C 0mm 2.9kPa 24134m 2.4m/s 2.6m/s
16:00
8% 25°C 0mm 64% 0cm 35° 33°C 0.06mm 1.8kPa 24135m 5.9m/s 4.1m/s
17:00
6% 25°C 0mm 70% 0cm 21° 31°C 0.06mm 1.4kPa 24134m 7.2m/s 4.1m/s
18:00
4% 25°C 0mm 71% 0cm 8° 31°C 0.06mm 1.3kPa 24135m 7.3m/s 3.2m/s
19:00 ☾
2% 25°C 0mm 75% 0cm -5° 30°C 0.06mm 1.1kPa 24135m 7.3m/s 3m/s
20:00 ☾
2% 25°C 0mm 76% 0cm -17° 30°C 0mm 0.99kPa 24134m 6.4m/s 2.8m/s
21:00 ☾
3% 25°C 0mm 74% 0cm -29° 30°C 0mm 1.1kPa 24135m 5.6m/s 2.5m/s
22:00 ☾
3% 24°C 0mm 75% 0cm -38° 29°C 0.19mm 1kPa 24135m 5.1m/s 2.9m/s
23:00 ☾
4% 24°C 0mm 78% 0cm -45° 28°C 0.25mm 0.85kPa 24134m 4.4m/s 2.4m/s
Fri, Jul 10 Sunrise 05:22 Sunset 18:39
24:00 ☾
4% 24°C 0mm 78% 0cm -47° 28°C 0.25mm 0.82kPa 24135m 3m/s 2m/s
01:00 ☾
5% 24°C 0mm 79% 0cm -45° 28°C 0.25mm 0.81kPa 24135m 2.7m/s 1.9m/s
02:00 ☾
8% 24°C 0mm 79% 0cm -39° 28°C 0mm 0.82kPa 24134m 2.9m/s 1.6m/s
03:00 ☾
11% 24°C 0mm 78% 0cm -29° 28°C 0mm 0.85kPa 24135m 3.5m/s 1.9m/s
04:00 ☾
14% 23°C 0mm 75% 0cm -18° 28°C 0mm 0.94kPa 24135m 4.6m/s 2.1m/s
05:00 ☾
12% 22°C 0mm 73% 0cm -5.6° 28°C 0mm 1kPa 24135m 4m/s 2.2m/s
06:00 ☾
9% 22°C 0mm 72% 0cm 7.3° 28°C 0mm 1kPa 24135m 5.5m/s 2.3m/s
07:00
7% 23°C 0mm 69% 0cm 21° 29°C 0mm 1.2kPa 24135m 5.5m/s 2.2m/s
08:00
10% 22°C 0mm 61% 0cm 34° 31°C 0mm 1.7kPa 24135m 3.9m/s 2.4m/s
09:00
13% 22°C 0mm 55% 0cm 48° 32°C 0mm 2.2kPa 24135m 3.5m/s 2.3m/s
10:00
16% 22°C 0mm 48% 0cm 62° 34°C 0mm 2.7kPa 24134m 3.5m/s 2.5m/s
11:00
15% 21°C 0mm 45% 0cm 76° 35°C 0mm 3.1kPa 24135m 4.1m/s 2.9m/s
12:00
13% 21°C 0mm 43% 0cm 88° 36°C 0mm 3.4kPa 24134m 4m/s 2.9m/s
13:00
12% 21°C 0mm 42% 0cm 76° 36°C 0mm 3.5kPa 24135m 3.9m/s 2.3m/s
14:00
9% 21°C 0mm 45% 0cm 62° 35°C 0mm 3.1kPa 24134m 2.8m/s 1.8m/s
15:00
7% 23°C 0mm 54% 0cm 49° 34°C 0mm 2.4kPa 24134m 3m/s 2.3m/s
16:00
4% 23°C 0mm 61% 0cm 35° 32°C 0mm 1.8kPa 24135m 5.3m/s 4.1m/s
17:00
4% 23°C 0mm 58% 0cm 21° 32°C 0mm 2kPa 24134m 5.8m/s 4m/s
18:00
4% 24°C 0mm 64% 0cm 8° 31°C 0mm 1.6kPa 24134m 6.3m/s 2.8m/s
19:00 ☾
4% 24°C 0mm 68% 0cm -5° 31°C 0mm 1.4kPa 24134m 4.7m/s 2m/s
20:00 ☾
5% 24°C 0mm 69% 0cm -17° 31°C 0mm 1.4kPa 24135m 3.2m/s 1.8m/s
21:00 ☾
7% 24°C 0mm 72% 0cm -29° 30°C 0mm 1.2kPa 24134m 2.4m/s 1.4m/s
22:00 ☾
8% 25°C 0mm 74% 0cm -38° 30°C 0mm 1.1kPa 24134m 1.2m/s 1m/s
23:00 ☾
8% 24°C 0mm 74% 0cm -45° 29°C 0mm 1.1kPa 24135m 3.3m/s 2.1m/s
Sat, Jul 11 Sunrise 05:22 Sunset 18:39
24:00 ☾
8% 23°C 0mm 70% 0cm -48° 29°C 0mm 1.2kPa 24135m 4.5m/s 2.2m/s
01:00 ☾
8% 22°C 0mm 69% 0cm -45° 29°C 0mm 1.2kPa 24135m 6.9m/s 2.8m/s
02:00 ☾
8% 23°C 0mm 63% 0cm -39° 30°C 0mm 1.6kPa 24135m 5.7m/s 2.7m/s
03:00 ☾
7% 23°C 0mm 58% 0cm -29° 32°C 0mm 2kPa 24135m 4.6m/s 2.7m/s
04:00 ☾
7% 22°C 0mm 53% 0cm -18° 33°C 0mm 2.4kPa 24135m 3.4m/s 2.6m/s
05:00 ☾
8% 22°C 0mm 50% 0cm -5.7° 34°C 0mm 2.7kPa 24135m 3.4m/s 2.6m/s
06:00 ☾
10% 22°C 0mm 47% 0cm 7.3° 35°C 0mm 3kPa 24135m 3.3m/s 2.6m/s
07:00
11% 22°C 0mm 45% 0cm 21° 36°C 0mm 3.3kPa 24135m 3.2m/s 2.6m/s
08:00
14% 23°C 0mm 46% 0cm 34° 36°C 0mm 3.3kPa 24135m 2.6m/s 1.8m/s
09:00
17% 23°C 0mm 46% 0cm 48° 36°C 0mm 3.2kPa 24135m 2m/s 1.1m/s
10:00
20% 23°C 0mm 47% 0cm 62° 36°C 0mm 3.1kPa 24135m 1.3m/s 0.29m/s
11:00
21% 23°C 0mm 53% 0cm 76° 34°C 0mm 2.5kPa 24135m 2.9m/s 1.2m/s
12:00
21% 24°C 0mm 59% 0cm 88° 32°C 0mm 2kPa 24135m 4.5m/s 2m/s
13:00
22% 23°C 0mm 65% 0cm 76° 31°C 0mm 1.5kPa 24135m 6.1m/s 2.9m/s
14:00
22% 24°C 0mm 68% 0cm 62° 30°C 0mm 1.4kPa 24135m 4.4m/s 2.2m/s
15:00
23% 24°C 0mm 70% 0cm 49° 30°C 0mm 1.3kPa 24135m 2.6m/s 1.5m/s
16:00
23% 24°C 0mm 73% 0cm 35° 30°C 0mm 1.1kPa 24135m 0.83m/s 0.79m/s
17:00
21% 24°C 0mm 74% 0cm 21° 29°C 0mm 1.1kPa 24135m 1m/s 0.97m/s
18:00
18% 24°C 0mm 75% 0cm 7.9° 29°C 0mm 1kPa 24135m 1.2m/s 1.2m/s
19:00 ☾
16% 24°C 0mm 76% 0cm -5° 29°C 0mm 0.97kPa 24135m 1.4m/s 1.3m/s
20:00 ☾
16% 24°C 0.003mm 77% 0cm -17° 29°C 0mm 0.9kPa 24135m 1.7m/s 1.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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