Mentone
📍 California , San Bernardino County · Nearest city: Mentone (6 km)
53 XC score / 100 · takeoff at 912 m · 📍 View on map
Coordinates and external links
34.11890, -117.11300Forecast next days
Updated: 2026-04-21 01:30 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Not recommended for flying, cloud base ~1112 m, strong wind (32 km/h).
base ~1112m · wind 32 km/h · precip 0.4mmMarginal conditions, cloud base ~1768 m, wind 14 km/h.
base ~1768m · wind 14 km/hNot recommended for flying, cloud base ~2150 m, wind 17 km/h.
base ~2150m · wind 17 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21❌ Not recommended · peak 40 at 8h
- Very stable day (CAPE<50, LI>2) — no thermals
- Cloud cover >85% — no radiation to trigger thermals
| 08 40 | 09 40 | 10 40 | 11 30 | 12 30 ☁️⚠️ | 13 40 ☁️⚠️ | 14 30 ☁️⚠️ 🏔️ | 15 24 ☁️⚠️ 🏔️ | 16 26 🏔️ | 17 20 🏔️ | 18 20 🏔️ | 19 35 | 20 35 |
Peak 8h: CAPE 0 J/kg · LI 13.1 · BL top 330 m · w* 0.0 m/s · cloud base 2274 m · 0°C at 3530 m · Pro score 62/100 · sun 28° 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: 08:00 (peak of the day)
Surface T: 11.6°C · Td: 0.7°C
LCL (cloud base): 1362 m
BL top: 330 m
0°C level: 3530 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) | 6 | Medium |
| Avg thermal probability | 0.80 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.39 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
Off a dirt road.
Nearby sites
Marshall (San Bernardino) (69) · 750' (San Bernardino) (48) · Regionals (5) · Crestline (San Bernardino) (68) · Ord (39) · Rubidoux - The Rock (8)