Marginal conditions

Belchenflue — 589m

Jura · Orientation S, SW
48%
Local flying
Best window: 6h — 7h
Local flying reaches 48% 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 — 7hXC 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
11 km/h
W · 276°
Gust spread
34 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
1368 m
41.1 km
Precipitation risk
Dry
no signal
Marginal conditions

Belchenflue — 589m

Jura · Orientation S, SW

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Send this forecast to a flying buddy.

Hourly windows

2026-08-18 · Local flying
6h
🌙
NIGHT
7h
🌤
GO
8h
⛅
MARGINAL
9h
☁️
GO
10h
☁️
MARGINAL
11h
☁️
MARGINAL
12h
☁️
MARGINAL
13h
☁️
MARGINAL
14h
☁️
MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
MARGINAL
18h
☁️
GO
19h
☁️
MARGINAL
20h
☁️
MARGINAL
Best window: 6h — 7h
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
——
619m
909m
1769m
2239m
2564m
2574m
2569m
2629m
2639m
2459m
1914m
Base
clouds
——
1126m
1314m
1564m
1802m
1927m
2002m
2039m
2139m
2227m
2239m
2102m
3600m
↘
51
↘
52
↘
50
↘
48
↘
44
↘
43
↘
44
↘
45
↘
47
↘
46
↘
46
↘
45
↘
45
3400m
↘
45
↘
47
↘
46
↘
44
↘
42
↘
42
↘
42
↘
44
↘
44
↘
43
↘
43
↘
43
↘
43
3200m
↘
39
↘
41
↘
41
↘
41
↘
40
↘
41
↘
41
↘
42
↘
42
↘
41
↘
41
↘
40
↘
41
3000m
↘
36
↘
38
↘
38
↘
38
↘
38
↘
39
↘
39
↘
39
↘
39
↘
38
↘
38
↘
38
↘
39
2800m
↘
34
↘
36
↘
36
↘
36
↘
37
↘
37
↘
37
↘
36
↘
36
↘
35
↘
35
↘
35
↘
36
2600m
→
32
→
33
↘
34
↘
34
↘
35
↘
36
↘
35
↘
33
→
32
→
31
→
31
→
32
→
33
2400m
→
30
→
30
→
31
↘
33
↘
34
↘
34
→
32
→
30
→
29
→
28
→
28
→
29
→
30
2200m
→
29
→
28
→
29
→
31
→
32
→
32
→
30
→
27
→
26
→
25
→
25
→
26
→
27
2000m
→
27
→
26
→
27
→
29
→
30
→
30
→
27
→
25
→
23
→
22
→
22
→
23
→
24
1800m
→
24
→
25
→
28
→
28
→
27
→
25
→
24
→
22
→
21
→
20
→
20
→
20
→
21
1600m
→
22
→
24
→
28
→
27
→
24
→
21
→
20
→
20
→
19
→
18
→
18
→
18
→
17
1400m
→
19
→
21
→
25
→
24
→
22
→
19
→
19
→
18
→
18
→
17
→
16
→
16
→
16
1200m
→
17
→
18
→
21
→
21
→
20
→
19
→
18
→
18
→
17
→
16
→
15
→
15
→
14
1000m
→
14
→
15
→
16
→
17
→
18
→
18
→
18
→
17
→
16
→
15
→
14
→
13
→
13
800m
→
9
→
9
→
10
→
12
→
15
→
17
→
17
→
16
→
15
→
14
→
12
→
11
→
11
600mLAUNCH
→
5
↗
6
→
5
→
6
→
9
→
11
→
12
→
11
→
11
→
10
→
8
→
7
→
6
400m
→
5
↗
6
→
4
→
6
→
9
→
11
→
12
→
11
→
11
→
10
→
8
→
7
→
6
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 76h 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.