Gumengrat
📍 Glarus · Nearest city: Linthal (4 km)
57 XC score / 100 · takeoff at 2020 m · 📍 View on map
Coordinates and external links
46.96030, 8.98743Forecast next days
Updated: 2026-04-19 16:11 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día volable, condiciones decentes, base de cúmulos ~527 m, viento 8 km/h.
base ~527m · wind 8 km/hDía volable, condiciones decentes, base de cúmulos ~811 m, viento 9 km/h, precipitación 0.8 mm.
base ~811m · wind 9 km/h · precip 0.8mmDía volable, condiciones decentes, base de cúmulos ~1376 m, viento 10 km/h.
base ~1376m · wind 10 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 55 at 12h
- Cobertura nubosa >85% — sin radiación para disparar
- Cloud suck alto (100/100) — base bajo freezing con CU
| 08 50 ☁️⚠️ | 09 50 ☁️⚠️ | 10 50 ☁️⚠️ | 11 50 ☁️⚠️ | 12 55 ☁️⚠️ | 13 40 ☁️⚠️ | 14 40 ☁️⚠️ | 15 40 ☁️⚠️ | 16 45 ☁️⚠️ | 17 55 ☁️⚠️ | 18 55 ☁️⚠️ | 19 55 ☁️⚠️ | 20 55 ☁️⚠️ |
Peak 12h: CAPE 0 J/kg · LI 1.1 · BL top 885 m · w* 0.0 m/s · cloud base 2682 m · 0°C at 2210 m · Pro score 66/100 · sun 39° over slope
2026-04-21⚠️ Marginal · peak 55 at 16h
- Cloud suck alto (100/100) — base bajo freezing con CU
| 08 20 ☁️⚠️ | 09 40 ☁️⚠️ | 10 50 ☁️⚠️ | 11 50 ☁️⚠️ | 12 50 ☁️⚠️ | 13 50 ☁️⚠️ | 14 50 ☁️⚠️ | 15 50 ☁️⚠️ | 16 55 ☁️⚠️ | 17 50 ☁️⚠️ | 18 50 ☁️⚠️ | 19 50 ☁️⚠️ | 20 50 ☁️⚠️ |
Peak 16h: CAPE 10 J/kg · LI 0.4 · BL top 1180 m · w* 0.0 m/s · cloud base 3345 m · 0°C at 2190 m · sun 24° 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: 2.7°C · Td: -2.6°C
LCL (cloud base): 662 m
BL top: 885 m
0°C level: 2210 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) | 9 | High |
| Avg thermal probability | 0.85 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.25 | 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
steep meadow, wind sock
Rules and notes
Observe wildlife protection area on opposite side of the valley (>> see pix) 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): www.skybriefing.com/portal/
Pilot comments
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Nearby sites
Braunwald 'Kiosk' (54) · Bodenberg (53) · Fisetengrat (49) · Schabell (40) · Hirzli (39) · Geissstock-1960 (10)