Le Sire Sud
📍 Rhone-Alpes , Departement de la Savoie · Nearest city: Mery (3 km)
56 XC score / 100 · takeoff at 1492 m · 📍 View on map
Coordinates and external links
45.63060, 5.96611Forecast next days
Updated: 2026-04-19 16:12 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~893 m, viento 11 km/h.
base ~893m · wind 11 km/hCondiciones marginales, base de cúmulos ~1131 m, viento 14 km/h.
base ~1131m · wind 14 km/hCondiciones marginales, base de cúmulos ~1147 m, viento 15 km/h.
base ~1147m · wind 15 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 60 at 15h
| 08 30 | 09 40 | 10 50 | 11 50 | 12 55 | 13 55 | 14 55 | 15 60 | 16 60 ☁️⚠️ | 17 50 | 18 50 | 19 50 | 20 50 |
Peak 15h: CAPE 0 J/kg · LI 1.6 · BL top 1240 m · w* 0.0 m/s · cloud base 2679 m · 0°C at 2700 m · Pro score 66/100 · sun 31° over slope
2026-04-21❌ Not recommended · peak 55 at 12h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
- Cloud suck alto (75/100) — base bajo freezing con CU
| 08 30 | 09 30 | 10 35 | 11 35 | 12 55 | 13 30 ☁️⚠️ | 14 35 | 15 40 | 16 40 ☁️⚠️ | 17 35 ☁️⚠️ | 18 30 ☁️⚠️ | 19 55 ☁️⚠️ | 20 30 |
Peak 12h: CAPE 0 J/kg · LI 3.8 · BL top 835 m · w* 0.0 m/s · cloud base 2204 m · 0°C at 2620 m · Pro score 62/100 · sun 41° 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: 11.5°C · Td: 2.0°C
LCL (cloud base): 1187 m
BL top: 1240 m
0°C level: 2700 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) | 4 | Medium |
| Avg thermal probability | 0.80 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.55 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
Very large and confortable. Possibility for several pilots to take off at once !
Pilot comments
By S or SW in winter this summer XC site can transform into a nice soaring site !
Nearby sites
Verel pragondran (46) · Revard (49) · Margeriaz (45) · Le Colombier (53) · Le chat (27) · Mont Pelat (46)