Gummen
📍 Nidwalden · Nearest city: Wolfenschiessen (2 km)
55 XC score / 100 · takeoff at 1580 m · 📍 View on map
Coordinates and external links
46.90190, 8.36259Forecast next days
Updated: 2026-04-19 16:14 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~549 m, viento 10 km/h.
base ~549m · wind 10 km/hDía volable, condiciones decentes, base de cúmulos ~716 m, viento 13 km/h.
base ~716m · wind 13 km/hDía volable, condiciones decentes, base de cúmulos ~980 m, viento 13 km/h.
base ~980m · wind 13 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 60 at 19h
- Cobertura nubosa >85% — sin radiación para disparar
- Cloud suck alto (100/100) — base bajo freezing con CU
⏰ Useful window: 16:00 – 17:00
| 08 30 ☁️⚠️ | 09 50 ☁️⚠️ | 10 50 ☁️⚠️ | 11 40 ☁️⚠️ | 12 40 ☁️⚠️ | 13 40 ☁️⚠️ | 14 45 ☁️⚠️ | 15 45 ☁️⚠️ | 16 55 ☁️⚠️ | 17 55 ☁️⚠️ | 18 55 ☁️⚠️ | 19 60 ☁️⚠️ | 20 30 ☁️⚠️ |
Peak 19h: CAPE 20 J/kg · LI 2.3 · BL top 590 m · w* 0.0 m/s · cloud base 2217 m · 0°C at 2200 m · Pro score 51/100
2026-04-21⚠️ Marginal · peak 55 at 12h
- Cloud suck alto (100/100) — base bajo freezing con CU
| 08 30 ☁️⚠️ | 09 20 ☁️⚠️ | 10 20 ☁️⚠️ | 11 50 ☁️⚠️ | 12 55 ☁️⚠️ | 13 55 ☁️⚠️ | 14 55 ☁️⚠️ | 15 55 ☁️⚠️ | 16 55 ☁️⚠️ | 17 50 ☁️⚠️ | 18 50 ☁️⚠️ | 19 50 ☁️⚠️ | 20 35 ☁️⚠️ |
Peak 12h: CAPE 10 J/kg · LI 2.8 · BL top 890 m · w* 0.0 m/s · cloud base 2092 m · 0°C at 2070 m · 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: 19:00 (peak of the day)
Surface T: 6.3°C · Td: 1.2°C
LCL (cloud base): 637 m
BL top: 590 m
0°C level: 2200 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) | 15 | High |
| Avg thermal probability | 0.85 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.20 | 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
Rules and notes
Airspaces in Switzerland are a tough subject, get all the info you can get before flying. More info on http://www.flyland.ch.
Pilot comments
MANY, often UNMARKED, badly visible CABLES in the whole valley ('Engelbergertal')!!
Nearby sites
Wirzweli (48) · Wirzweli-Horn (48) · Büelen / Bueelen (60) · Blatti (44) · Rinderalp-1680 (42) · Arvialp (51)