Marginal conditions

Brienzer Rothorn — 2255m

Imported · Orientation S · 180°

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Hourly windows

2026-04-05 · Local flying
6h
🌙
NIGHT
7h
🌤
GO
8h
⛅
MARGINAL
9h
🌤
MARGINAL
10h
🌤
MARGINAL
11h
☀️
MARGINAL
12h
🌤
MARGINAL
13h
🌤
MARGINAL
14h
☀️
MARGINAL
15h
🌤
MARGINAL
16h
⛅
MARGINAL
17h
🌤
MARGINAL
18h
⛅
MARGINAL
19h
⛅
MARGINAL
20h
☁️
MARGINAL
Best window: 6h — 7h
AI analysis
No analysis available for this day.

📊 Wind & thermals aloft

🎓 Full view
💡
Overview: colored arrows show wind speed and direction. Yellow to orange cells highlight the active thermal layer. The LAUNCH line marks the takeoff altitude.
Alt.6h7h8h9h10h11h12h13h14h15h16h17h18h
Top
BLH
——
2285m
2275m
2275m
2285m
2315m
2340m
2345m
2335m
2325m
2310m
2305m
Base
clouds
——
3093m
3155m
3343m
3630m
3880m
3755m
4130m
3580m
3480m
3318m
3155m
3600m
→
43
→
44
→
43
→
45
→
47
→
45
→
45
→
44
→
42
↗
43
→
44
↗
44
↗
47
3400m
→
42
→
42
→
42
→
45
→
47
→
45
→
45
→
43
→
41
↗
41
↗
42
↗
42
↗
45
3200m
→
40
→
41
→
40
→
46
→
47
→
44
→
44
→
42
→
39
↗
40
↗
40
↗
41
↗
43
3000m
→
37
→
37
→
37
→
42
→
43
→
41
→
41
→
39
→
37
↗
37
↗
38
↗
39
↗
41
2800m
→
32
→
33
→
33
→
37
→
39
→
37
→
37
→
36
→
35
↗
35
↗
35
↗
36
↗
38
2600m
→
28
→
28
→
29
→
33
→
34
→
33
→
33
→
33
↗
33
↗
33
→
33
→
33
↗
35
2400m
→
24
→
23
→
25
→
28
→
29
→
28
→
29
→
29
↗
30
↗
30
→
30
→
30
↗
31
2200mLAUNCH
→
19
→
19
→
21
→
23
→
24
→
24
↗
25
↗
26
↗
28
↗
28
→
27
→
28
→
28
2000m
1800m
1600m
1400m
1200m
1000m
800m
600m
400m
200m
0–56–1011–1516–2021–25>25km/hBLH topCloud baseThermals

💨 Wind at launch

🎓 Safety thresholds
💡
Mean wind is the constant speed. Gusts are sudden accelerations. Thresholds: 15 km/h = caution, 25 km/h = critical.

🌡 Temperature

🎓 Why it matters?
💡
Launch temperature affects your comfort and safety. Below 0°C, your fingers go numb and handling controls becomes difficult.

💧 Precipitation

🎓 Impact on the wing
⚠️
Golden rule: never fly in rain or snow. Water weighs down the wing (up to +5 kg), alters its aerodynamic profile and reduces lift. Snow can freeze on suspension lines.
Snow Rain/Showers

Sources: Open-Meteo (AROME 1.3km, ICON-D2 2km) · 2026-04-05 · Data fetched on 5 Apr at 20:57
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.