Flying not recommended

Grenchenberg N — 1323m

Jura · Orientation N, NW

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Hourly windows

2026-04-05 · Local flying
7h
🌙
NIGHT
8h
🌤
NO-GO
gusts
9h
🌤
NO-GO
gusts
10h
☁️
NO-GO
gusts
11h
☁️
NO-GO
gusts
12h
☁️
NO-GO
gusts
13h
🌤
NO-GO
gusts
14h
⛅
NO-GO
gusts
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
MARGINAL
18h
☁️
GO
19h
☁️
NO-GO
gusts
20h
☁️
NO-GO
gusts
Best window: 18h — 18h
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
——
1443m
1528m
1728m
2338m
2763m
3133m
3493m
3628m
2833m
2583m
2143m
Base
clouds
——
1823m
1848m
1873m
2086m
2298m
2211m
2373m
2586m
2648m
2711m
2361m
3600m
→
53
→
55
→
60
→
62
→
62
→
58
→
56
→
56
→
59
→
57
→
59
→
63
→
65
3400m
→
53
→
54
→
61
→
62
→
61
→
56
→
55
→
54
→
58
→
55
→
58
→
61
→
65
3200m
→
52
→
54
→
61
→
61
→
60
→
55
→
54
→
51
→
56
→
53
→
57
↗
59
→
64
3000m
→
51
→
53
→
61
→
60
→
58
→
54
→
53
→
49
→
53
→
50
→
54
→
55
→
61
2800m
→
50
→
52
→
59
→
58
→
57
→
53
→
52
→
48
→
50
→
48
→
51
→
52
→
58
2600m
→
48
→
51
→
57
→
56
→
56
→
53
→
51
→
47
→
47
→
45
→
48
→
48
→
54
2400m
→
47
→
50
→
55
→
55
→
55
→
52
→
50
→
45
→
44
→
42
→
45
→
45
→
51
2200m
→
46
→
49
→
54
→
53
→
54
→
51
→
49
→
44
→
41
→
39
→
42
→
41
→
47
2000m
→
44
→
48
→
52
→
52
→
53
→
50
→
48
→
42
→
38
→
36
→
38
→
38
→
44
1800m
↗
43
→
47
→
50
→
50
→
52
↗
50
→
47
→
41
→
34
→
33
→
35
→
35
→
41
1600m
↗
42
↗
47
↗
49
↗
48
↗
51
↗
50
→
47
→
39
→
31
→
30
→
32
→
32
→
37
1400mLAUNCH
↗
37
↗
41
↗
42
↗
43
↗
46
↗
44
→
41
→
34
→
28
→
27
→
29
→
29
→
33
1200m
↗
31
↗
35
↗
35
↗
36
↗
38
↗
37
→
34
→
29
→
25
→
25
→
26
→
27
→
29
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) · 2026-04-05 · Data fetched on 5 Apr at 16:21
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.