Vionnaz Turn
📍 Valais , Monthey District · Nearest city: Vouvry (2 km)
56 XC score / 100 · takeoff at 1002 m · 📍 View on map
Coordinates and external links
46.31950, 6.87959Forecast next days
Updated: 2026-04-19 16:12 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día muy favorable para XC, base de cúmulos ~934 m, viento 14 km/h.
base ~934m · wind 14 km/hDía muy favorable para XC, base de cúmulos ~1036 m, viento 13 km/h.
base ~1036m · wind 13 km/hDía volable, condiciones decentes, base de cúmulos ~1352 m, viento 10 km/h.
base ~1352m · wind 10 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-20✅ Flyable · peak 55 at 8h
| 08 55 | 09 55 | 10 55 | 11 50 | 12 50 | 13 55 | 14 55 | 15 55 | 16 50 ☁️⚠️ | 17 50 | 18 50 | 19 55 | 20 55 |
Peak 8h: CAPE 0 J/kg · LI 2.6 · BL top 75 m · w* 0.0 m/s · cloud base 1552 m · 0°C at 2640 m · Pro score 64/100 · sun 24° over slope
2026-04-21✅ Flyable · peak 60 at 15h
| 08 35 | 09 55 | 10 40 | 11 50 | 12 50 | 13 50 | 14 50 | 15 60 | 16 55 ☁️⚠️ | 17 60 | 18 35 | 19 35 | 20 30 |
Peak 15h: CAPE 10 J/kg · LI 2.4 · BL top 1235 m · w* 0.0 m/s · cloud base 2002 m · 0°C at 2330 m · sun 31° over slope
Hourly flyability (0–100). ⛈️ = storm risk · ☁️⚠️ = cloud suck · 🏔️ = active ridge lift. CAPE = convective energy, LI = stability, BL top = thermal ceiling, w* = estimated dry thermal velocity. Source: Open-Meteo (ECMWF/GFS/ICON blend model).
Estimated vertical profile (Sounding)
Reference time: 08:00 (peak of the day)
Surface T: 7.9°C · Td: 3.5°C
LCL (cloud base): 550 m
BL top: 75 m
0°C level: 2640 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 8 | High |
| Avg thermal probability | 0.87 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.33 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
steep slope
Nearby sites
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