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: 2026-04-21 01:25 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~645 m, wind 15 km/h.
base ~645m · wind 15 km/hFlyable day, decent conditions, cloud base ~631 m, wind 14 km/h.
base ~631m · wind 14 km/hMarginal conditions, cloud base ~1263 m, wind 12 km/h.
base ~1263m · wind 12 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 12h
- High cloud suck (100/100) — base below freezing with 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: 12:00 (peak of the day)
Surface T: 5.4°C · Td: 1.3°C
LCL (cloud base): 512 m
BL top: 890 m
0°C level: 2070 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
🌬 Daily wind (next days)
Daily summary (10m wind). Full hour × altitude chart is being added progressively.
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)