Marginal conditions

Rotenflue (W) — 1515m

Imported · Orientation W · 270°
40%
Local flying
Best window: 12h — 12h
Local flying reaches 40% because the launch setup looks mostly workable, while lift quality and timing are what keep the score from climbing higher.
Local window 12h — 12hXC window No clear XC window
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Launch wind
8 km/h
N · 348°
Gust spread
29 km/h
rough launch feel
Lift quality
0.4 m/s
2/5 climb support
Cloud base
1313 m
32.3 km
Precipitation risk
0.3 mm/h
light showers possible
Marginal conditions

Rotenflue (W) — 1515m

Imported · Orientation W · 270°

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Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
☁️
NO-GO
tailwind
8h
☁️
NO-GO
tailwind
9h
⛅
NO-GO
tailwind
10h
⛅
MARGINAL
11h
⛅
MARGINAL
12h
⛅
GO
13h
⛅
MARGINAL
14h
⛅
MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
MARGINAL
18h
☁️
MARGINAL
19h
☁️
MARGINAL
20h
☁️
MARGINAL
Best window: 12h — 12h
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
——
1610m
1970m
2455m
2840m
2805m
3045m
3135m
3030m
2775m
2430m
2065m
Base
clouds
——
2615m
2728m
2878m
2965m
2978m
2915m
2803m
2703m
2553m
2440m
2290m
3600m
↗
10
↗
10
↗
11
↗
13
↗
15
↗
16
↗
18
↗
20
↗
22
↗
23
↗
24
↗
24
↗
23
3400m
↗
9
↗
9
↗
9
↗
11
↗
13
↗
14
↗
16
↗
19
↑
21
↗
22
↗
23
↗
23
↗
21
3200m
↗
8
↗
7
↗
8
↗
9
↗
10
↗
12
↑
14
↑
17
↑
20
↑
21
↑
22
↑
21
↑
20
3000m
↗
7
↗
6
↗
6
↗
8
↗
9
↗
11
↑
13
↑
15
↑
18
↑
19
↑
19
↑
19
↑
18
2800m
↗
6
↗
5
↑
6
↑
7
↑
8
↑
10
↑
11
↑
13
↖
15
↗
15
↗
16
↗
16
↗
15
2600m
↗
6
↑
5
↑
5
↑
6
↑
8
↑
9
↑
9
↖
10
↖
12
→
12
↗
12
↗
13
↗
13
2400m
↗
5
↑
4
↑
4
↑
6
↑
7
↑
8
↑
8
↖
7
←
9
→
9
↗
9
↗
10
↗
10
2200m
↑
4
↑
4
↑
4
↑
5
↑
6
↖
7
↖
6
←
5
↙
6
↘
5
→
5
↗
7
↗
8
2000m
↑
4
↑
3
↑
3
↖
4
↖
6
↖
6
↖
4
←
2
↓
3
↓
2
→
2
→
4
→
5
1800m
↑
4
↑
4
↑
4
↖
4
↖
5
←
5
←
5
↙
5
↓
6
↓
6
↘
5
→
5
→
6
1600mLAUNCH
↑
5
↑
5
↑
5
↖
4
←
3
←
4
↙
6
↓
8
↓
10
↓
10
↘
8
↘
6
↘
6
1400mLAUNCH
↑
6
↑
6
↑
5
↖
3
←
3
↙
4
↓
7
↓
10
↓
12
↓
11
↓
9
↓
7
↘
6
1200m
1000m
800m
600m
400m
200m
0m
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) · 2026-05-04 · Data fetched on 28 Apr at 21:57
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.