Flying not recommended

Belchenflue — 589m

Jura · Orientation S, SW
25%
Local flying
Best window: 9h — 10h
Local flying is limited first by wind gusts too strong. Outside of that constraint, some periods still look flyable, but the day is not broadly comfortable.
Local window 9h — 10hXC window No clear XC windowWatch-out: Wind gusts too strong
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Launch wind
8 km/h
SW · 217°
Gust spread
45 km/h
rough launch feel
Lift quality
0.6 m/s
4/5 climb support
Cloud base
857 m
31.8 km
Precipitation risk
0.4 mm/h
light showers possible
Flying not recommended

Belchenflue — 589m

Jura · Orientation S, SW

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Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
🌦
MARGINAL
8h
🌦
MARGINAL
9h
🌦
GO
10h
🌦
GO
11h
🌦
MARGINAL
12h
⛅
MARGINAL
13h
⛅
MARGINAL
14h
⛅
MARGINAL
15h
🌦
MARGINAL
16h
🌦
NO-GO
gusts
17h
🌦
NO-GO
18h
🌤
NO-GO
19h
🌤
NO-GO
20h
🌤
MARGINAL
Best window: 9h — 10h
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
——
629m
1029m
1164m
1309m
1434m
1524m
1544m
1479m
1339m
1159m
969m
Base
clouds
——
714m
839m
1039m
1252m
1414m
1564m
1677m
1639m
1539m
1414m
1277m
3600m
↗
29
↗
31
↗
33
↗
34
↗
35
↗
36
↗
39
↗
43
↗
46
↗
48
↗
50
↗
51
↗
50
3400m
↗
29
↗
31
↗
33
↗
34
↗
35
↗
37
↗
40
↗
43
↗
46
↗
49
↗
51
↗
51
↗
50
3200m
↗
30
↗
32
↗
33
↗
35
↗
36
↗
38
↗
41
↗
44
↗
47
↗
49
↗
52
↗
52
↗
51
3000m
↗
30
↗
31
↗
33
↗
34
↗
36
↗
37
↗
40
↗
44
↗
47
↗
49
↗
51
↗
51
↗
50
2800m
↗
28
↗
29
↗
30
↗
32
↗
33
↗
35
↗
38
↗
42
↗
45
↗
46
↗
48
↗
48
↗
47
2600m
↗
27
↗
27
↗
28
↗
29
↗
31
↗
33
↗
36
↗
40
↗
43
↗
44
↗
44
↗
44
↗
43
2400m
↗
25
↗
25
↗
25
↗
27
↗
29
↗
31
↗
34
↗
38
↗
41
↗
41
↗
41
↗
40
↗
40
2200m
↗
23
↗
22
↗
23
↗
24
↗
26
↗
29
↗
32
↗
36
↗
38
↗
38
↗
37
↗
36
↗
36
2000m
↗
21
↗
20
↗
20
↗
22
↗
24
↗
27
↗
30
↗
34
↗
36
↗
36
↗
34
↗
32
↗
33
1800m
↗
19
↗
17
↗
17
↗
19
↗
21
↗
24
↗
26
↗
28
↗
29
↗
29
↗
28
↗
28
↗
29
1600m
↗
16
↗
14
↗
14
↗
16
↗
19
↗
22
↗
22
↗
22
↗
22
↗
22
↗
23
→
24
→
25
1400m
↗
13
↗
11
↗
11
↗
13
↗
16
↗
18
↗
18
↗
18
↗
18
↗
17
→
18
→
19
→
20
1200m
↗
10
↑
9
↑
9
↑
10
↑
12
↗
14
↗
15
↗
16
↗
16
↗
14
→
14
→
15
→
15
1000m
↑
7
↑
7
↑
7
↑
8
↑
9
↑
10
↑
12
↗
14
↗
14
↗
12
→
10
↘
11
↘
10
800m
↑
6
↑
6
↑
6
↑
6
↑
8
↑
9
↑
11
↗
13
↗
14
↗
11
→
9
↘
10
↘
9
600mLAUNCH
↑
4
↑
4
↑
4
↑
5
↑
6
↑
7
↑
9
↗
11
↗
11
↗
9
→
7
↘
8
↘
7
400m
↑
3
↑
3
↑
3
↑
4
↑
6
↑
7
↑
9
↗
10
↗
10
↗
8
→
7
↘
8
↘
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

Sources: Open-Meteo (AROME 1.3km, ICON-D2 2km) · 2026-05-04 · Data fetched on 28 Apr at 20:07
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.