Lac de Crop
📍 Rhone-Alpes , Departement de l'Isere · Nearest city: Le Champ-pres-Froges (9 km)
54 XC score / 100 · takeoff at 2095 m · 📍 View on map
Coordinates and external links
45.20380, 5.98620Forecast next days
Updated: 2026-04-19 16:16 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~497 m, viento 11 km/h.
base ~497m · wind 11 km/hDía volable, condiciones decentes, base de cúmulos ~895 m, viento 12 km/h.
base ~895m · wind 12 km/hCondiciones marginales, base de cúmulos ~1338 m, viento 12 km/h.
base ~1338m · wind 12 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 63 at 17h
- Cloud suck alto (86/100) — base bajo freezing con CU
| 08 30 ☁️⚠️ | 09 50 ☁️⚠️ | 10 55 ☁️⚠️ | 11 50 ☁️⚠️ | 12 40 ☁️⚠️ | 13 40 ☁️⚠️ | 14 50 ☁️⚠️ | 15 50 ☁️⚠️ | 16 58 ☁️⚠️ | 17 63 | 18 40 ☁️⚠️ | 19 58 | 20 50 ☁️⚠️ |
Peak 17h: CAPE 0 J/kg · LI -0.4 · BL top 1120 m · w* 0.0 m/s · cloud base 2657 m · 0°C at 2700 m · Pro score 65/100 · sun 17° over slope
2026-04-21❌ Not recommended · peak 60 at 17h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
- Cloud suck alto (70/100) — base bajo freezing con CU
| 08 30 ☁️⚠️ | 09 30 ☁️⚠️ | 10 30 ☁️⚠️ | 11 55 ☁️⚠️ | 12 55 | 13 30 ☁️⚠️ | 14 30 ☁️⚠️ | 15 30 ☁️⚠️ | 16 55 ☁️⚠️ | 17 60 ☁️⚠️ | 18 55 ☁️⚠️ | 19 50 ☁️⚠️ | 20 50 ☁️⚠️ |
Peak 17h: CAPE 20 J/kg · LI 3.5 · BL top 1065 m · w* 0.0 m/s · cloud base 2845 m · 0°C at 2820 m · Pro score 52/100 · sun 18° 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: 17:00 (peak of the day)
Surface T: 6.5°C · Td: 2.0°C
LCL (cloud base): 562 m
BL top: 1120 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) | 14 | High |
| Avg thermal probability | 0.79 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.17 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
park the car where you can see sign to 'lac de Crop'. follow the signs, around 800m. Find a good grass slop and have fun.
Nearby sites
Le Grand Replomb (67) · Col de Freydane (54) · Prapoutel les 7 laux (53) · Croix de Chamrousse (56) · Chamrousse - l'Aiguille / la Croix (63) · Alpes d'huez (50)