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Mt. Si

1🟡 Marginal

USA · Takeoff 916 m

Forecast next days

2026-10-0245

Condiciones marginales, base de cúmulos ~156 m, viento 11 km/h.

Wind max: 11 km/h
Base: 156 m
CAPE: 40
LI: 4.7
2026-10-0365

Día volable, condiciones decentes, base de cúmulos ~843 m, viento 10 km/h.

Wind max: 10 km/h
Base: 843 m
CAPE: 0
LI: 1.8
2026-10-0440

Condiciones marginales, base de cúmulos ~1542 m, viento 9 km/h.

Wind max: 9 km/h
Base: 1542 m
CAPE: 0
LI: 4.7
2026-10-0540

Condiciones marginales, base de cúmulos ~1085 m, viento 7 km/h.

Wind max: 7 km/h
Base: 1085 m
CAPE: 0
LI: 5.0

Map and thermal hotspots

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Takeoff description

This is one of the classic hike & fly destinations. Basic info: http://mvkazit.blogspot.com/2021/03/mount-si-hike-fly.html

About this site

Mt. Si is a paragliding launch site in USA, near Tanner. Takeoff elevation is 916 meters above sea level. It has a moderate thermal and XC score of 1/100. Check the daily forecast above for current flyability conditions including CAPE, lifted index, cloud base height, and wind speed.