Montlambert
📍 Rhone-Alpes , Departement de la Savoie · Nearest city: Cruet (3 km)
64 XC score / 100 · takeoff at 869 m · 📍 View on map
Coordinates and external links
45.55280, 6.10510Forecast next days
Updated: 2026-04-20 13:20 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~1290 m, viento 14 km/h.
base ~1290m · wind 14 km/hDía volable, condiciones decentes, base de cúmulos ~1465 m, viento 14 km/h.
base ~1465m · wind 14 km/hDía volable, condiciones decentes, base de cúmulos ~1415 m, viento 10 km/h.
base ~1415m · wind 10 km/hDía volable, condiciones decentes, base de cúmulos ~1748 m, viento 10 km/h.
base ~1748m · 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 65 at 13h
- Cobertura nubosa >85% — sin radiación para disparar
| 08 20 | 09 40 | 10 50 | 11 40 | 12 50 | 13 65 | 14 60 | 15 65 | 16 60 | 17 50 | 18 55 | 19 58 | 20 60 |
Peak 13h: CAPE 0 J/kg · LI 1.1 · BL top 1285 m · w* 0.0 m/s · cloud base 1931 m · 0°C at 2640 m · Pro score 84/100 · sun 39° over slope
2026-04-21⚠️ Marginal · peak 55 at 11h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
| 08 30 | 09 30 | 10 35 | 11 55 | 12 50 | 13 30 | 14 35 | 15 35 | 16 40 | 17 35 ☁️⚠️ | 18 35 | 19 55 | 20 30 |
Peak 11h: CAPE 0 J/kg · LI 3.7 · BL top 805 m · w* 0.0 m/s · cloud base 1669 m · 0°C at 2610 m · Pro score 76/100 · sun 40° 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: 13:00 (peak of the day)
Surface T: 15.5°C · Td: 7.0°C
LCL (cloud base): 1062 m
BL top: 1285 m
0°C level: 2640 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 S | gust 15 | 12 km/h S | gust 16 | 7 km/h W | gust 18 |
| 2026-04-21 | 5 km/h SW | gust 18 | 8 km/h W | gust 27 | 10 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) | 15 | High |
| Avg thermal probability | 0.81 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.59 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
alti: 890m after 12h thermals and breeze can be strong. Lot's of pilots come here, we thank you to drive slowly and respect the people living on the road to the launch area. This site is fragile! If people complain too much we might lose the right to fly here. So don't unload your car at the turning point on top. Do it when parked further down the road. Respect nature, the people and regulations!
Pilot comments
This site is closed between mid September to beginning of November, because of an agreement with the local hunters. It is their best moment of joy, so again respect their fun as they do ours! Please inform yourselves about exact days of no-flying. On some days flying is still allowed.
Nearby sites
Saint-Jean-de-la-Porte (44) · Mont Pelat (46) · Le Colombier (53) · Villaroux "Les vaches" (32) · Margeriaz (45) · Allevard-Malatrait (51)