Marginal conditions

Grütschalp — 1608m

Imported · Orientation E, SE · 113°
40%
Local flying
Best window: 6h — 6h
Local flying reaches 40% 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 6h — 6hXC window No clear XC window
Save this forecast to your account for quick access later.
Launch wind
4 km/h
S · 164°
Gust spread
40 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
1411 m
37.6 km
Precipitation risk
Dry
no signal
Marginal conditions

Grütschalp — 1608m

Imported · Orientation E, SE · 113°

Save this forecast to your account for quick access later.

Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
☁️
MARGINAL
8h
☁️
MARGINAL
9h
⛅
MARGINAL
10h
⛅
MARGINAL
11h
⛅
MARGINAL
12h
⛅
MARGINAL
13h
⛅
MARGINAL
14h
⛅
MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
NO-GO
tailwind
18h
☁️
NO-GO
tailwind
19h
☁️
MARGINAL
20h
☁️
MARGINAL
Best window: 6h — 6h
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
——
1653m
1853m
2133m
2458m
2758m
2983m
3068m
2978m
2753m
2448m
2128m
Base
clouds
——
2533m
2621m
2758m
2858m
2971m
3108m
3146m
3146m
3146m
2996m
2671m
3600m
↑
8
↑
9
↑
10
↑
12
↗
13
↗
14
↗
15
↗
15
↗
15
↗
15
↗
15
↗
15
↗
15
3400m
↑
7
↑
8
↑
8
↑
9
↑
10
↑
11
↑
12
↑
13
↑
14
↑
14
↑
14
↑
14
↑
13
3200m
↑
6
↑
6
↑
6
↑
7
↑
8
↑
9
↑
10
↑
11
↑
12
↑
12
↑
12
↑
12
↑
12
3000m
↑
5
↑
5
↑
5
↑
6
↑
6
↑
7
↑
8
↑
9
↑
10
↑
11
↑
11
↑
11
↑
10
2800m
↑
6
↑
6
↑
6
↑
6
↑
6
↑
6
↑
7
↑
8
↑
9
↑
9
↑
9
↗
9
↗
9
2600m
↑
7
↑
7
↑
7
↑
7
↑
6
↑
6
↑
6
↑
7
↑
8
↑
8
↑
7
↗
7
↗
7
2400m
↑
8
↑
8
↑
8
↑
7
↑
6
↖
5
↖
6
↑
6
↑
7
↑
6
↑
5
↗
5
→
5
2200m
↑
9
↑
9
↖
9
↖
8
↖
6
↖
5
↖
5
↑
5
↑
5
↑
5
↑
3
→
3
→
3
2000m
↖
10
↖
10
↖
10
↖
8
↖
6
↖
5
↖
4
↑
4
↑
4
↑
3
↑
2
→
1
↘
1
1800m
↖
10
↖
10
↖
9
↖
8
↖
6
↖
5
↖
4
↑
4
↑
4
↑
3
↑
2
→
1
↘
1
1600mLAUNCH
↖
10
↖
10
↖
9
↖
8
↖
6
↖
5
↖
4
↑
4
↑
4
↑
3
↑
2
→
1
↘
1
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 18:30
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.