Saint Hilaire du Touvet
📍 Rhone-Alpes , Departement de l'Isere · Nearest city: Saint-Hilaire (1 km)
64 XC score / 100 · takeoff at 906 m · 📍 View on map
Coordinates and external links
45.30690, 5.88806Forecast next days
Updated: 2026-04-19 16:04 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día muy favorable para XC, base de cúmulos ~756 m, viento 12 km/h.
base ~756m · wind 12 km/hDía volable, condiciones decentes, base de cúmulos ~1026 m, viento 12 km/h.
base ~1026m · wind 12 km/hCondiciones marginales, base de cúmulos ~1269 m, viento 9 km/h.
base ~1269m · 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✅ Flyable · peak 83 at 16h
⏰ Useful window: 15:00 – 17:00
| 08 35 | 09 50 | 10 55 | 11 40 | 12 55 | 13 65 | 14 70 | 15 75 | 16 83 | 17 78 | 18 65 | 19 68 | 20 60 |
Peak 16h: CAPE 170 J/kg · LI -0.4 · BL top 1385 m · w* 8.0 m/s · cloud base 1843 m · 0°C at 2640 m · Pro score 75/100 · sun 24° over slope
2026-04-21❌ Not recommended · peak 55 at 11h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
- Cloud suck alto (67/100) — base bajo freezing con CU
| 08 30 | 09 30 | 10 30 | 11 55 | 12 55 | 13 35 | 14 30 | 15 30 | 16 50 | 17 40 ☁️⚠️ | 18 40 ☁️⚠️ | 19 50 | 20 50 |
Peak 11h: CAPE 0 J/kg · LI 3.6 · BL top 765 m · w* 0.0 m/s · cloud base 1668 m · 0°C at 2710 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: 16:00 (peak of the day)
Surface T: 16.0°C · Td: 8.5°C
LCL (cloud base): 937 m
BL top: 1385 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 | 4 km/h E | gust 12 | 8 km/h E | gust 15 | 11 km/h NE | gust 17 |
| 2026-04-21 | 6 km/h E | gust 18 | 8 km/h E | gust 20 | 9 km/h NE | gust 23 |
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) | 13 | High |
| Avg thermal probability | 0.83 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.56 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
North take off is a comfortable big carpet, but may be downwind of the thermic blowing in front. South take off's in grass and you may find more facing thermal wind here than in north take off.
Rules and notes
You must not climb over 3000m. This flight regulation is due to the Lyon International Airport proximity. Please don't mess with it !
Pilot comments
an easy XC: after take off go to the south (your right). Follow the cliff and cross the 'Manival', a little valley. Work the first thermal and go up to the crest of 'Saint Eynard'. Follow this crest to the south until a beautifull old 'fort'. Come back with the same way. After 'Manival' valley you can go up the the 'Dent de Crolles' summit and follow the big crest to 'Le Granier' summit in the north direction. Come back at 'St hilaire' and land near your car :-))
Nearby sites
La Dent de Crolles (64) · Pravouta (72) · Col de Baure (48) · Saint Pierre de Chartreuse - La Scia (70) · Grand Som (50) · Charmant Som (47)