Acceptable conditions

Le Treh (Markstein) — 1206m

Vosges · Orientation W, SW
50%
Local flying
Best window: 12h — 16h
Local flying reaches 50% 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 12h — 16hXC window No clear XC window
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Launch wind
10 km/h
SW · 224°
Gust spread
33 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
811 m
16.8 km
Precipitation risk
0.1 mm/h
light showers possible
Acceptable conditions

Le Treh (Markstein) — 1206m

Vosges · Orientation W, SW

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Hourly windows

2026-05-04 · Local flying
6h
🌙
NIGHT
7h
☁️
MARGINAL
8h
☁️
MARGINAL
9h
☁️
GO
10h
☁️
MARGINAL
11h
☁️
MARGINAL
12h
☁️
GO
13h
☁️
GO
14h
☁️
GO
15h
☁️
GO
16h
☁️
GO
17h
☁️
MARGINAL
18h
🌦
MARGINAL
19h
🌦
MARGINAL
20h
🌦
MARGINAL
Best window: 12h — 16h
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
——
1361m
1401m
1481m
1586m
1691m
1771m
1806m
1786m
1731m
1651m
1561m
Base
clouds
——
1519m
1593m
1706m
1831m
1969m
2081m
2181m
2206m
2144m
2056m
1894m
3600m
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37
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37
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37
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37
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37
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36
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35
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33
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31
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29
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28
3400m
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39
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3200m
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42
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35
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34
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25
3000m
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44
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42
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40
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39
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38
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37
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36
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34
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33
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30
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25
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24
2800m
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43
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41
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39
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38
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37
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36
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34
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33
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31
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26
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24
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23
2600m
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42
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41
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39
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37
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36
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35
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33
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32
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30
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25
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22
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21
2400m
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42
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40
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38
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36
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35
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34
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32
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31
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26
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23
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19
2200m
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41
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39
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37
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35
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34
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32
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31
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29
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27
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25
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22
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20
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18
2000m
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41
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38
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36
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34
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33
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31
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30
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28
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26
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24
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21
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18
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16
1800m
↗
40
↗
37
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35
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32
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31
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29
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27
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25
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23
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21
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19
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17
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16
1600m
↗
39
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36
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34
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31
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28
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25
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23
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22
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20
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18
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17
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15
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15
1400m
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35
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33
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30
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27
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24
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22
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20
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19
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17
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16
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15
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14
→
15
1200mLAUNCH
↗
24
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22
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20
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19
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18
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→
14
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) · 2026-05-04 · Data fetched on 28 Apr at 12:36
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.