Acceptable conditions

Montgremay — 875m

Jura · Orientation N, NW
53%
Local flying
Best window: 17h — 20h
Local flying reaches 53% 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 17h — 20hXC 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
13 km/h
W · 281°
Gust spread
36 km/h
rough launch feel
Lift quality
0.2 m/s
0/5 climb support
Cloud base
1470 m
41.2 km
Precipitation risk
Dry
no signal
Acceptable conditions

Montgremay — 875m

Jura · Orientation N, NW

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Send this forecast to a flying buddy.

Hourly windows

2026-08-18 · Local flying
6h
🌙
NIGHT
7h
⛅
MARGINAL
8h
☁️
MARGINAL
9h
☁️
GO
10h
☁️
MARGINAL
11h
☁️
MARGINAL
12h
☁️
MARGINAL
13h
☁️
MARGINAL
14h
☁️
MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
GO
18h
☁️
GO
19h
☁️
GO
20h
☁️
GO
Best window: 17h — 20h
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
——
945m
2060m
2410m
2390m
2520m
2595m
2645m
2710m
2745m
2630m
2235m
Base
clouds
——
1513m
1675m
1938m
2150m
2313m
2400m
2488m
2538m
2588m
2550m
2463m
3600m
↘
53
↘
52
↘
50
↘
47
↘
42
↘
40
↘
41
↘
44
↘
46
↘
46
↘
45
↘
44
↘
43
3400m
↘
48
↘
48
↘
48
↘
45
↘
40
↘
38
↘
39
↘
42
↘
43
↘
44
↘
43
↘
42
↘
41
3200m
↘
42
↘
43
↘
46
↘
43
↘
39
↘
36
↘
37
↘
39
↘
41
↘
41
↘
41
↘
40
↘
39
3000m
↘
39
↘
40
↘
43
↘
41
↘
38
↘
35
↘
35
↘
36
↘
37
↘
38
↘
38
↘
38
↘
36
2800m
↘
36
↘
38
↘
42
↘
40
↘
37
↘
34
↘
33
↘
33
↘
33
↘
34
↘
35
→
35
→
33
2600m
↘
34
↘
35
↘
40
↘
39
↘
36
↘
33
↘
32
↘
30
↘
29
→
30
→
32
→
32
→
30
2400m
↘
31
↘
33
↘
38
↘
37
↘
35
↘
33
↘
30
↘
27
→
26
→
27
→
29
→
30
→
27
2200m
↘
28
↘
31
↘
36
↘
36
↘
34
↘
32
↘
28
→
24
→
22
→
23
↗
26
↗
27
→
24
2000m
↘
26
↘
29
↘
34
↘
34
↘
33
↘
31
→
26
→
21
→
19
→
20
↗
23
↗
25
↗
21
1800m
↘
27
↘
29
↘
32
↘
31
↘
30
→
27
→
24
→
21
→
19
→
20
→
22
→
23
→
21
1600m
→
27
→
29
↘
30
↘
28
→
26
→
24
→
22
→
20
→
19
→
19
→
21
→
21
→
21
1400m
→
26
→
27
→
28
→
27
→
25
→
23
→
21
→
20
→
19
→
19
→
20
→
20
→
20
1200m
→
23
→
25
→
26
→
25
→
24
→
22
→
21
→
20
→
19
→
19
→
20
→
20
→
19
1000m
→
19
→
21
→
22
→
23
→
23
→
22
→
21
→
19
→
18
→
18
→
19
→
19
→
18
800mLAUNCH
→
14
→
14
→
15
→
16
→
19
→
20
→
20
→
18
→
17
→
17
→
18
→
18
→
17
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 77h 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.