Cordon - Tête du Planet
📍 Rhone-Alpes , Departement de la Haute-Savoie · Nearest city: Cordon (3 km)
56 XC score / 100 · takeoff at 1806 m · 📍 View on map
Coordinates and external links
45.91300, 6.57076Forecast 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 ~991 m, viento 4 km/h.
base ~991m · wind 4 km/hDía volable, condiciones decentes, base de cúmulos ~1097 m, viento 10 km/h.
base ~1097m · wind 10 km/hDía muy favorable para XC, base de cúmulos ~1500 m, viento 10 km/h.
base ~1500m · 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⚠️ Marginal · peak 55 at 14h
- Cloud suck alto (90/100) — base bajo freezing con CU
| 08 50 ☁️⚠️ | 09 50 ☁️⚠️ | 10 50 ☁️⚠️ | 11 50 ☁️⚠️ | 12 50 ☁️⚠️ | 13 50 ☁️⚠️ | 14 55 ☁️⚠️ | 15 50 ☁️⚠️ | 16 50 ☁️⚠️ | 17 50 ☁️⚠️ | 18 50 ☁️⚠️ | 19 50 ☁️⚠️ | 20 50 ☁️⚠️ |
Peak 14h: CAPE 0 J/kg · LI 0.3 · BL top 1930 m · w* 0.0 m/s · cloud base 3031 m · 0°C at 2550 m · Pro score 70/100 · sun 36° over slope
2026-04-21⚠️ Marginal · peak 55 at 10h
- Cloud suck alto (98/100) — base bajo freezing con CU
| 08 35 | 09 35 | 10 55 | 11 55 ☁️⚠️ | 12 55 ☁️⚠️ | 13 55 ☁️⚠️ | 14 40 ☁️⚠️ | 15 45 ☁️⚠️ | 16 35 ☁️⚠️ | 17 40 ☁️⚠️ | 18 30 ☁️⚠️ | 19 35 ☁️⚠️ | 20 35 ☁️⚠️ |
Peak 10h: CAPE 0 J/kg · LI 2.7 · BL top 670 m · w* 0.0 m/s · cloud base 2343 m · 0°C at 2450 m · Pro score 66/100 · 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: 14:00 (peak of the day)
Surface T: 8.4°C · Td: -1.4°C
LCL (cloud base): 1225 m
BL top: 1930 m
0°C level: 2550 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 | 0.82 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.31 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
1838m Thermal activity from the morning. Good for crossing: portal to cross in the Aravis. After 13h00 the valleywind is stronger than the thermal and so it's backwind. better to back up to "plateau des benets" take off.
Pilot comments
Wind sensor https://www.openwindmap.org/PP213
Nearby sites
Cordon - Plateau des Benets (46) · Praz sur arly (56) · Les chalets du Nant (42) · Megeve (55) · La Clusaz (54) · Les chalets du Lachat (44)