Praz sur arly
📍 Rhone-Alpes , Departement de la Haute-Savoie · Nearest city: Praz-sur-Arly (0 km)
56 XC score / 100 · takeoff at 1009 m · 📍 View on map
Coordinates and external links
45.83360, 6.57028Forecast next days
Updated: 2026-04-19 16:13 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~1465 m, viento 16 km/h.
base ~1465m · wind 16 km/hDía muy favorable para XC, base de cúmulos ~1548 m, viento 13 km/h.
base ~1548m · wind 13 km/hDía muy favorable para XC, base de cúmulos ~1958 m, viento 11 km/h.
base ~1958m · wind 11 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 16h
- Cloud suck alto (64/100) — base bajo freezing con CU
⏰ Useful window: 16:00 – 16:00
| 08 60 | 09 50 | 10 50 | 11 60 | 12 60 ☁️⚠️ | 13 50 ☁️⚠️ | 14 50 ☁️⚠️ | 15 50 ☁️⚠️ | 16 65 ☁️⚠️ | 17 60 ☁️⚠️ | 18 60 ☁️⚠️ | 19 60 | 20 50 |
Peak 16h: CAPE 50 J/kg · LI 0.9 · BL top 2085 m · w* 8.0 m/s · cloud base 2496 m · 0°C at 2600 m · Pro score 55/100 · sun 24° over slope
2026-04-21❌ Not recommended · peak 60 at 12h
- Día muy estable (CAPE<50, LI>2) — sin térmicas
- Cloud suck alto (79/100) — base bajo freezing con CU
| 08 40 | 09 30 | 10 50 | 11 55 | 12 60 | 13 60 ☁️⚠️ | 14 55 ☁️⚠️ | 15 60 ☁️⚠️ | 16 60 ☁️⚠️ | 17 60 | 18 55 ☁️⚠️ | 19 50 ☁️⚠️ | 20 35 |
Peak 12h: CAPE 10 J/kg · LI 2.6 · BL top 1375 m · w* 0.0 m/s · cloud base 2296 m · 0°C at 2410 m · Pro score 63/100 · 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: 16:00 (peak of the day)
Surface T: 16.3°C · Td: 4.4°C
LCL (cloud base): 1487 m
BL top: 2085 m
0°C level: 2600 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) | 8 | High |
| Avg thermal probability | 0.81 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.38 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
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