Marginal conditions

Jungfraujoch — 3449m

Imported · Orientation NW · 315°
35%
Local flying
Best window: No clear local window
Local flying reaches 35% 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 No clear local windowXC window No clear XC window
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Launch wind
4 km/h
SW · 209°
Gust spread
25 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
1389 m
27.0 km
Precipitation risk
Dry
no signal
Marginal conditions

Jungfraujoch — 3449m

Imported · Orientation 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
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MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
MARGINAL
18h
☁️
MARGINAL
19h
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MARGINAL
20h
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MARGINAL
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
——
3459m
3689m
3719m
3749m
3769m
3784m
3779m
3749m
3704m
3644m
3584m
Base
clouds
——
4287m
4424m
4649m
4849m
4924m
4936m
4912m
4837m
4762m
4612m
4399m
3600m
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9
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15
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16
3400mLAUNCH
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8
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9
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13
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15
3200m
3000m
2800m
2600m
2400m
2200m
2000m
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1600m
1400m
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1000m
800m
600m
400m
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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 18:32
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.