Marginal conditions

Bietstöckli — 1759m

Imported · Orientation N, W, NW · 315°
40%
Local flying
Best window: 14h — 14h
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 14h — 14hXC window No clear XC window
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Launch wind
3 km/h
S · 196°
Gust spread
33 km/h
rough launch feel
Lift quality
0.5 m/s
4/5 climb support
Cloud base
1679 m
36.9 km
Precipitation risk
0.7 mm/h
becomes limiting
Marginal conditions

Bietstöckli — 1759m

Imported · Orientation N, W, NW · 315°

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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
⛅
NO-GO
tailwind
11h
⛅
NO-GO
tailwind
12h
☁️
MARGINAL
13h
☁️
MARGINAL
14h
☁️
GO
15h
⛈
MARGINAL
16h
⛈
MARGINAL
17h
⛈
MARGINAL
18h
⛈
NO-GO
rain
19h
⛈
NO-GO
rain
20h
⛈
NO-GO
rain
Best window: 14h — 14h
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
——
1919m
1994m
2134m
2294m
2449m
2574m
2644m
2649m
2609m
2544m
2454m
Base
clouds
——
2871m
3022m
3259m
3484m
3684m
3909m
3809m
3259m
2659m
2284m
2109m
3600m
↗
9
↗
10
↑
11
↗
13
↗
14
↗
15
↗
15
↗
14
↗
14
↗
16
↗
19
↗
21
↗
21
3400m
↗
8
↗
8
↑
9
↑
11
↗
12
↗
13
↗
13
↗
13
↑
14
↗
16
↑
18
↗
20
↑
19
3200m
↗
6
↑
6
↑
7
↑
8
↑
10
↑
11
↑
12
↑
13
↑
13
↑
15
↑
18
↑
19
↑
18
3000m
↗
6
↑
5
↑
6
↑
7
↑
8
↑
10
↑
11
↑
11
↑
12
↑
14
↑
16
↑
18
↑
16
2800m
↗
6
↑
6
↑
6
↑
7
↑
8
↑
9
↑
9
↑
10
↑
10
↑
11
↗
13
↗
15
↑
14
2600m
↑
6
↑
6
↑
6
↑
7
↑
8
↑
8
↑
8
↑
8
↑
8
↗
9
↗
11
↗
12
↗
11
2400m
↑
6
↑
6
↑
6
↑
7
↑
7
↑
8
↑
7
↑
7
↑
6
↗
6
↗
8
↗
9
↗
9
2200m
↑
6
↑
6
↑
6
↑
7
↑
7
↑
7
↑
6
↑
5
↑
4
↗
3
→
5
→
6
↗
6
2000m
↖
7
↖
7
↖
7
↖
6
↖
7
↖
6
↖
5
↖
3
↑
2
↗
1
→
2
→
3
→
4
1800mLAUNCH
↑
7
↑
7
↑
7
↖
6
↖
6
↖
5
↖
4
←
3
←
2
→
2
↘
3
↘
4
→
5
1600m
↑
8
↑
8
↑
7
↖
6
↖
5
←
4
←
3
↙
3
↙
3
↘
3
↘
5
↘
5
↘
6
1400m
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 20:07
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.