Acceptable conditions

Grütschalp — 1608m

Imported · Orientation E, SE · 113°
50%
Local flying
Best window: 8h — 13h
Local flying reaches 50% 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 8h — 13hXC window No clear XC window
Forecast-based estimate — not a flight clearance. Always check live conditions and assess on site.
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Send this forecast to a flying buddy.
Launch wind
1 km/h
S · 192°
Gust spread
27 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
541 m
32.6 km
Precipitation risk
Dry
no signal
Acceptable conditions

Grütschalp — 1608m

Imported · Orientation E, SE · 113°

Save this forecast to your account for quick access later.
Send this forecast to a flying buddy.

Hourly windows

2026-08-18 · Local flying
6h
🌙
NIGHT
7h
⛅
MARGINAL
8h
⛅
GO
9h
⛅
GO
10h
⛅
GO
11h
⛅
GO
12h
⛅
GO
13h
⛅
GO
14h
⛅
MARGINAL
15h
⛅
NO-GO
tailwind
16h
⛅
NO-GO
tailwind
17h
⛅
NO-GO
tailwind
18h
☁️
NO-GO
tailwind
19h
☁️
MARGINAL
20h
☁️
MARGINAL
Best window: 8h — 13h
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
——
1623m
1878m
2173m
2308m
2443m
2538m
2438m
2398m
2318m
2208m
2038m
Base
clouds
——
1958m
1958m
1945m
1958m
2033m
2133m
2246m
2321m
2408m
2408m
2271m
3600m
↘
43
↘
44
↘
44
↘
42
↘
39
↘
36
↘
36
↘
36
↘
35
↘
32
↘
29
↘
27
↘
27
3400m
↘
37
↘
38
↘
38
↘
36
↘
33
↘
32
↘
31
↘
31
↘
30
↘
28
↘
25
↘
23
↘
23
3200m
↘
31
↘
32
↘
31
↘
30
↘
28
↘
27
↘
26
↘
26
↘
25
↘
23
↘
20
↘
19
↘
19
3000m
→
26
↘
27
↘
27
↘
25
↘
24
↘
23
↘
23
↘
22
↘
22
↘
20
↘
17
↘
16
↘
16
2800m
→
22
→
23
↘
22
→
21
→
20
→
19
→
19
→
19
→
19
→
17
→
15
→
14
↘
14
2600m
→
17
→
18
→
17
→
17
→
16
→
16
→
16
→
16
→
16
→
14
→
13
→
12
→
12
2400m
→
13
→
13
→
13
→
13
→
12
→
13
→
13
↗
13
↗
13
→
12
→
10
→
10
→
10
2200m
→
8
→
9
→
8
→
8
→
9
↗
9
↗
10
↗
10
↗
10
↗
9
→
8
→
8
→
7
2000m
→
5
→
5
→
5
→
5
↗
5
↗
6
↗
7
↗
7
↑
8
↗
7
→
6
→
7
→
6
1800m
↗
5
↗
5
↗
3
↑
3
↗
3
↗
4
↑
4
↑
5
↑
5
→
4
↘
5
↘
7
↘
6
1600mLAUNCH
↗
6
↗
4
↑
1
↖
1
↑
1
↑
2
↑
2
↑
3
↑
3
↓
2
↓
5
↓
7
↓
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
Updated 78h ago

Sources: Open-Meteo (AROME 1.3km, ICON-D2 2km) · 2026-08-18
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.