Vionnaz Frassette Lieu-dit Pro-de-Chaud
📍 Valais , Monthey District · Nearest city: Vouvry (2 km)
56 XC score / 100 · takeoff at 1311 m · 📍 View on map
Coordinates and external links
46.32070, 6.86777Forecast next days
Updated: 2026-04-19 16:11 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~680 m, viento 11 km/h.
base ~680m · wind 11 km/hDía volable, condiciones decentes, base de cúmulos ~925 m, viento 12 km/h.
base ~925m · wind 12 km/hDía volable, condiciones decentes, base de cúmulos ~1336 m, viento 10 km/h.
base ~1336m · 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❌ Not recommended · peak 60 at 19h
- Cobertura nubosa >85% — sin radiación para disparar
- Cloud suck alto (81/100) — base bajo freezing con CU
| 08 50 | 09 40 | 10 40 | 11 40 | 12 40 | 13 50 | 14 50 ☁️⚠️ | 15 55 | 16 50 ☁️⚠️ | 17 50 ☁️⚠️ | 18 55 | 19 60 | 20 55 ☁️⚠️ |
Peak 19h: CAPE 30 J/kg · LI 2.4 · BL top 200 m · w* 0.0 m/s · cloud base 2123 m · 0°C at 2410 m · Pro score 51/100
2026-04-21⚠️ Marginal · peak 60 at 15h
- Cloud suck alto (75/100) — base bajo freezing con CU
| 08 35 | 09 55 | 10 40 | 11 50 ☁️⚠️ | 12 50 ☁️⚠️ | 13 50 ☁️⚠️ | 14 50 ☁️⚠️ | 15 60 | 16 35 ☁️⚠️ | 17 40 ☁️⚠️ | 18 35 ☁️⚠️ | 19 35 ☁️⚠️ | 20 30 |
Peak 15h: CAPE 10 J/kg · LI 3.4 · BL top 1235 m · w* 0.0 m/s · cloud base 2298 m · 0°C at 2330 m · Pro score 55/100 · 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: 19:00 (peak of the day)
Surface T: 10.0°C · Td: 3.5°C
LCL (cloud base): 812 m
BL top: 200 m
0°C level: 2410 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 |
Nearby sites
Vionnaz Turn (56) · Mayen (60) · Portes d Onne-1920 (61) · Grammont (51) · Pointe de Bellevue-2030 (43) · Les Pétis (55)