Acceptable conditions

Mervelier — 757m

Jura · Orientation W
55%
Local flying
Best window: 20h — 20h
Local flying reaches 55% because the launch setup looks mostly workable, while lift quality and timing are what keep the score from climbing higher.
Local window 20h — 20hXC window No clear XC window
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Launch wind
2 km/h
W · 270°
Gust spread
14 km/h
rough launch feel
Lift quality
0.2 m/s
2/5 climb support
Cloud base
632 m
32.6 km
Precipitation risk
0.3 mm/h
light showers possible
Acceptable conditions

Mervelier — 757m

Jura · Orientation W

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Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
🌧
NO-GO
low base
8h
🌧
NO-GO
9h
☁️
NO-GO
10h
☁️
MARGINAL
11h
☁️
MARGINAL
12h
☁️
MARGINAL
13h
☁️
MARGINAL
14h
☁️
MARGINAL
15h
🌦
MARGINAL
16h
🌦
MARGINAL
17h
🌦
MARGINAL
18h
🌧
MARGINAL
19h
🌧
MARGINAL
20h
🌧
GO
Best window: 20h — 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
——
1007m
1167m
1397m
1652m
1887m
2057m
2122m
2052m
1872m
1627m
1367m
Base
clouds
——
882m
995m
1169m
1320m
1432m
1469m
1482m
1470m
1382m
1307m
1257m
3600m
↗
31
↗
29
↗
27
↗
27
↗
26
↗
26
↗
24
↑
23
↑
22
↑
21
↗
20
↗
20
↑
17
3400m
↗
31
↗
29
↗
27
↗
26
↗
25
↑
24
↑
23
↑
22
↑
21
↑
20
↑
18
↑
18
↑
15
3200m
↗
31
↗
28
↗
26
↗
25
↑
24
↑
23
↑
22
↑
21
↑
19
↑
18
↑
17
↑
15
↑
14
3000m
↗
31
↗
28
↗
26
↗
24
↑
23
↑
22
↑
21
↑
19
↑
18
↑
17
↑
15
↑
13
↑
12
2800m
↗
32
↗
28
↗
25
↗
23
↑
22
↑
21
↑
19
↑
18
↑
17
↑
15
↑
13
↑
11
↑
10
2600m
↗
32
↗
28
↗
25
↗
23
↑
21
↑
20
↑
18
↑
17
↑
15
↑
13
↑
11
↑
9
↑
8
2400m
↗
32
↗
28
↗
25
↗
22
↗
20
↑
19
↑
17
↑
15
↑
14
↑
11
↑
9
↑
7
↑
6
2200m
↗
32
↗
28
↗
25
↗
22
↗
19
↑
17
↑
15
↑
14
↑
12
↑
10
↑
7
↖
5
↑
5
2000m
↗
33
↗
28
↗
25
↗
21
↗
19
↑
16
↑
14
↑
13
↑
11
↑
8
↑
5
↖
3
↖
3
1800m
↗
33
↗
30
↗
27
↗
23
↗
19
↗
15
↑
12
↑
11
↑
9
↑
6
↑
4
↑
4
↑
4
1600m
↗
34
↗
33
↗
30
↗
25
↗
19
↗
14
↗
11
↑
9
↑
7
↑
4
→
3
→
5
→
7
1400m
↗
32
↗
32
↗
30
↗
25
↗
18
↗
12
↗
9
↑
7
↑
5
↑
2
↘
3
↘
7
↘
9
1200m
↗
22
↗
21
↗
20
↗
16
↗
12
↗
8
↗
6
↑
4
↗
3
→
2
↘
4
↘
7
↘
10
1000m
↗
12
↗
11
↗
9
↗
8
↗
6
↗
4
↗
3
↗
2
↗
1
↘
2
↘
5
↘
8
↘
11
800mLAUNCH
↑
5
↑
5
↑
4
↑
4
↗
3
↗
3
↗
3
↗
2
→
1
↘
2
↘
5
↘
7
↘
9
600m
↑
4
↖
3
↖
3
↑
2
↗
2
↗
3
↗
2
↗
1
→
1
↘
2
↘
4
↘
6
↘
7
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) · 2026-05-04 · Data fetched on 28 Apr at 12:37
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.