L’Alpe des Chaux
📍 Vaud , Aigle District · Nearest city: Villars-sur-Ollon (4 km)
62 XC score / 100 · takeoff at 1809 m · 📍 View on map
Coordinates and external links
46.29530, 7.10909Forecast next days
Updated: 2026-04-20 13:21 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día muy favorable para XC, base de cúmulos ~995 m, viento 10 km/h.
base ~995m · wind 10 km/hDía volable, condiciones decentes, base de cúmulos ~911 m, viento 11 km/h.
base ~911m · wind 11 km/hDía muy favorable para XC, base de cúmulos ~1375 m, viento 9 km/h, precipitación 0.7 mm.
base ~1375m · wind 9 km/h · precip 0.7mmDía muy favorable para XC, base de cúmulos ~1484 m, viento 9 km/h.
base ~1484m · wind 9 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 65 at 15h
- Cobertura nubosa >85% — sin radiación para disparar
- Cloud suck alto (100/100) — base bajo freezing con CU
⏰ Useful window: 13:00 – 16:00
| 08 50 | 09 50 | 10 55 ☁️⚠️ | 11 55 ☁️⚠️ | 12 50 ☁️⚠️ | 13 45 ☁️⚠️ | 14 55 ☁️⚠️ | 15 65 ☁️⚠️ | 16 55 ☁️⚠️ | 17 50 ☁️⚠️ | 18 55 ☁️⚠️ | 19 55 ☁️⚠️ | 20 60 |
Peak 15h: CAPE 110 J/kg · LI 0.1 · BL top 875 m · w* 8.0 m/s · cloud base 2446 m · 0°C at 2500 m · Pro score 76/100 · sun 30° over slope
2026-04-21⚠️ Marginal · peak 55 at 10h
- Cloud suck alto (96/100) — base bajo freezing con CU
| 08 30 | 09 50 | 10 55 | 11 55 ☁️⚠️ | 12 55 ☁️⚠️ | 13 50 ☁️⚠️ | 14 55 ☁️⚠️ | 15 50 ☁️⚠️ | 16 45 ☁️⚠️ | 17 55 ☁️⚠️ | 18 35 ☁️⚠️ | 19 35 ☁️⚠️ | 20 35 ☁️⚠️ |
Peak 10h: CAPE 0 J/kg · LI 2.5 · BL top 695 m · w* 0.0 m/s · cloud base 2259 m · 0°C at 2280 m · Pro score 78/100 · sun 36° 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: 15:00 (peak of the day)
Surface T: 7.6°C · Td: 2.5°C
LCL (cloud base): 637 m
BL top: 875 m
0°C level: 2500 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
Wind chart — altitude × time
Color: green < 20 km/h · yellow 20-30 · red >40. Arrows point to where the wind is blowing. Each column = 1 hour. 4 altitudes: 10m surface, 80m first thermal, 1500m (850 hPa) thermal cruise, 3000m (700 hPa) top.
Wind next days (Open-Meteo model)
Wind rose 10m — 2026-04-20
| Date | Morning 08-12h | Midday 12-16h | Evening 16-20h | |||
|---|---|---|---|---|---|---|
| 2026-04-20 | 5 km/h SW | gust 16 | 9 km/h SW | gust 24 | 7 km/h W | gust 24 |
| 2026-04-21 | 4 km/h SW | gust 27 | 11 km/h W | gust 34 | 9 km/h NW | gust 32 |
Colors: green < 15 km/h (optimal) · orange 15-25 · red >25 (flying not recommended). ⚠️ = shear >25 km/h between 10m and 850 hPa (potentially broken thermals).
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 10 | High |
| Avg thermal probability | 0.81 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.45 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Nearby sites
Les Bouquetins (50) · Le Chamossaire-1980 (61) · En Curnaux (45) · Les Verneys (52) · Dent de Fully (49) · Les Diablerets (59)