Flims -Cassonsgrat
📍 Grisons , Imboden District · Nearest city: Flims (5 km)
62 XC score / 100 · takeoff at 2664 m · 📍 View on map
Coordinates and external links
46.87970, 9.26356Forecast next days
Updated: 2026-04-21 01:17 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~411 m, wind 17 km/h.
base ~411m · wind 17 km/hFlyable day, decent conditions, cloud base ~904 m, wind 13 km/h.
base ~904m · wind 13 km/hFlyable day, decent conditions, cloud base ~2487 m, wind 10 km/h.
base ~2487m · wind 10 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21⚠️ Marginal · peak 55 at 13h
- High cloud suck (96/100) — base below freezing with CU
| 08 20 ☁️⚠️ | 09 30 ☁️⚠️ | 10 50 ☁️⚠️ | 11 50 ☁️⚠️ | 12 50 ☁️⚠️ | 13 55 ☁️⚠️ | 14 55 ☁️⚠️ | 15 55 ☁️⚠️ | 16 55 ☁️⚠️ | 17 50 ☁️⚠️ | 18 55 ☁️⚠️ | 19 50 ☁️⚠️ | 20 50 ☁️⚠️ |
Peak 13h: CAPE 10 J/kg · LI 1.1 · BL top 1225 m · w* 0.0 m/s · cloud base 3864 m · 0°C at 2310 m · Pro score 73/100 · sun 38° 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: -0.5°C · Td: -10.1°C
LCL (cloud base): 1200 m
BL top: 1225 m
0°C level: 2310 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 — 2026-04-21
| Date | Morning 08-12h | Midday 12-16h | Evening 16-20h | |||
|---|---|---|---|---|---|---|
| 2026-04-21 | 2 km/h SW | gust 16 | 7 km/h W | gust 24 | 8 km/h NW | gust 20 |
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 | 0.80 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.45 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Upcoming competitions in this country
- PWCA Italy Gemona 2026 · 2026-07-25 – 2026-08-01 · PWCA
Copa del Mundo en Gemona del Friuli, Italia
Takeoff description
As of Oct'15, this great launch can only be reached by hiking from Flims/ Naraus, as the cable car has been dismantled :-((
Rules and notes
Airspaces in Switzerland are a tough subject, get all the info you can get before flying: http://www.flyland.ch. DABS (active danger areas etc): https://www.skybriefing.com/portal/
Pilot comments
be aware of the local Flight restrictions > 'Flimserstein'
Nearby sites
Flims -Naraus-1850 (60) · Larnags (5) · Flims- Laax - Crap Sogn Gion (61) · Falera (39) · Riein (48) · Alp Motta (5)