Mieussy
📍 Rhone-Alpes , Departement de la Haute-Savoie · Nearest city: Mieussy (2 km)
68 XC score / 100 · takeoff at 1608 m · 📍 View on map
Coordinates and external links
46.14490, 6.54591Forecast next days
Updated: 2026-04-20 13:17 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~679 m, viento 16 km/h.
base ~679m · wind 16 km/hDía volable, condiciones decentes, base de cúmulos ~883 m, viento 19 km/h.
base ~883m · wind 19 km/hCondiciones marginales, base de cúmulos ~1068 m, viento 8 km/h.
base ~1068m · wind 8 km/hCondiciones marginales, base de cúmulos ~1337 m, viento 8 km/h.
base ~1337m · wind 8 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 13h
- Cobertura nubosa >85% — sin radiación para disparar
- Cloud suck alto (64/100) — base bajo freezing con CU
⏰ Useful window: 18:00 – 19:00
| 08 50 | 09 40 | 10 40 | 11 40 | 12 50 | 13 65 | 14 50 ☁️⚠️ 🏔️ | 15 50 ☁️⚠️ 🏔️ | 16 50 ☁️⚠️ 🏔️ | 17 50 ☁️⚠️ 🏔️ | 18 55 ☁️⚠️ | 19 55 ☁️⚠️ | 20 55 |
Peak 13h: CAPE 0 J/kg · LI 1.2 · BL top 1215 m · w* 0.0 m/s · cloud base 2183 m · 0°C at 2580 m · Pro score 82/100 · sun 39° over slope
2026-04-21❌ Not recommended · peak 55 at 12h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
- Cloud suck alto (89/100) — base bajo freezing con CU
| 08 35 | 09 35 | 10 35 | 11 50 ☁️⚠️ | 12 55 ☁️⚠️ | 13 55 ☁️⚠️ | 14 35 ☁️⚠️ | 15 40 ☁️⚠️ | 16 35 ☁️⚠️ | 17 35 ☁️⚠️ | 18 35 ☁️⚠️ | 19 35 ☁️⚠️ | 20 30 ☁️⚠️ |
Peak 12h: CAPE 10 J/kg · LI 3.0 · BL top 1015 m · w* 0.0 m/s · cloud base 2358 m · 0°C at 2440 m · Pro score 65/100 · 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: 9.3°C · Td: 4.7°C
LCL (cloud base): 575 m
BL top: 1215 m
0°C level: 2580 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 21 | 14 km/h W | gust 27 | 11 km/h W | gust 28 |
| 2026-04-21 | 3 km/h W | gust 15 | 8 km/h W | gust 31 | 8 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) | 8 | High |
| Avg thermal probability | 0.77 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.78 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
several TOs/ -directions available (see link below)
Pilot comments
This is the place where it all began (in 1978)!
Nearby sites
Les Gets - Mont Chery (57) · Agy plane (49) · Chapel's combe (40) · Habere poche (46) · brizon (45) · Thonon-orcier (52)