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Marginal conditions

Niesen S — 2215m

Imported · Orientation SE, S, SW · 180°
45%
Local flying
Best window: 7h — 8h
Local flying reaches 45% because launch wind and basic weather stay usable, but the day does not generate enough lift to feel easy or rewarding for long.
Local window 7h — 8hXC window No clear XC window
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Launch wind
6 km/h
E · 81°
Gust spread
16 km/h
rough launch feel
Lift quality
0.0 m/s
0/5 climb support
Cloud base
598 m
33.0 km
Precipitation risk
Dry
no signal
Marginal conditions

Niesen S — 2215m

Imported · Orientation SE, S, SW · 180°

Save this forecast to your account for quick access later.

Hourly windows

2026-05-21 · Local flying
6h
☀️
MARGINAL
7h
⛅
GO
8h
🌤
GO
9h
🌤
MARGINAL
10h
🌤
MARGINAL
11h
🌤
NO-GO
tailwind
12h
☁️
NO-GO
tailwind
13h
🌤
NO-GO
tailwind
14h
🌤
NO-GO
tailwind
15h
🌤
NO-GO
tailwind
16h
⛅
NO-GO
tailwind
17h
☁️
NO-GO
tailwind
18h
☁️
NO-GO
tailwind
19h
☁️
NO-GO
tailwind
20h
⛅
NO-GO
tailwind
Best window: 7h — 8h
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
——
2230m
2410m
2510m
2665m
2790m
2870m
2945m
3025m
2980m
2985m
2865m
Base
clouds
——
2753m
2890m
2790m
2828m
2778m
2940m
2827m
2790m
2740m
2665m
2740m
3600m
↓
33
↓
32
↓
31
↓
29
↓
26
↓
23
↓
21
↓
18
↘
16
↘
14
↘
15
↘
16
↘
16
3400m
↓
28
↓
29
↓
28
↓
26
↓
24
↓
20
↓
18
↓
15
↘
14
↘
12
↘
13
↘
14
↘
15
3200m
↓
24
↓
25
↓
25
↓
23
↓
21
↓
18
↓
15
↓
13
↘
12
↘
10
↘
11
↘
12
→
13
3000m
↓
21
↓
22
↓
22
↓
20
↓
18
↓
16
↓
14
↓
12
↓
11
↘
9
↘
10
↘
11
↘
12
2800m
↘
18
↓
19
↓
18
↓
17
↓
16
↓
14
↓
13
↓
11
↓
10
↓
9
↘
9
↘
10
↘
11
2600m
↘
15
↘
15
↘
15
↓
14
↓
14
↓
12
↓
11
↓
10
↓
9
↓
8
↓
8
↘
9
↘
9
2400m
↘
12
↘
12
↘
12
↓
12
↓
12
↓
11
↓
10
↓
9
↓
8
↓
8
↓
8
↓
8
↘
8
2200mLAUNCH
↘
9
↘
9
↘
9
↓
9
↓
9
↓
9
↓
8
↓
8
↓
8
↓
7
↓
7
↓
7
↓
6
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) · 2026-05-21 · Data fetched on 20 May at 22:21
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.