Santiago International Airport turbulence forecast
Santiago, Chile
SCL (Santiago, Chile) sits at 33.39°S, 70.79°W, 1,555 ft elevation — coastal with the Andes nearby.
About SCL
Chile's primary international airport.
- Climate
- Subtropical coastal — mild winters, humid summers
- Nearby terrain
- Andes
- Geography
- Coastal — marine-influenced airmass
What to expect on departures
Computed from SCL's geography and climate
The jet stream meanders across this latitude seasonally — SCL sees its strongest CAT exposure in June–August, when the polar jet pushes equatorward and routes intersect it more often. December-onwards departures climb into cleaner upper-level flow. The Andes sit upwind of SCL on prevailing flow days, generating mountain-wave turbulence that can extend several hundred kilometres downwind at cruise level. The lee-wave risk is highest when June–August winds at FL300 cross the Andes at near-perpendicular angles. Monsoon months pump moisture and instability into the local airmass — expect significantly more convective turbulence during the wet season at SCL, with much smoother cruise during dry-season operations. SCL's coastal position means departures often transit from the cool marine boundary layer into warmer continental air within minutes of takeoff — a brief but reliable bumpy transition on warm-season afternoons when the sea breeze is set up.
Climbout notes
Standard Instrument Departures (SIDs) often route around terrain; on strong-wind days, low-level turbulence in the lee of the hills is common in the first few thousand feet.
Turbulence conditions
Andes Mountains create significant mountain wave turbulence. Routes over the mountains, particularly to Buenos Aires, are notoriously bumpy. Winter conditions increase turbulence.
Seasonal pattern
Southern Hemisphere winter (June–August) is when the subtropical jet strengthens, and that's when long-haul CAT is most likely. Southern summer (December–February) is the main convective window. Mountain-wave activity near the Andes peaks in the cold season when upper-level winds blow hardest across the range.
- Peak turbulence
- Monsoon months (varies by hemisphere)
- Typically calmest
- Dry season
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Popular routes from SCL
SCL turbulence FAQ
Is turbulence common on flights from SCL?
Santiago International Airport is best described as a mountain-wave sensitive airport. The jet stream meanders across this latitude seasonally — SCL sees its strongest CAT exposure in June–August, when the polar jet pushes equatorward and routes intersect it more often.
When is turbulence worst for Santiago flights?
Southern Hemisphere winter (June–August) is when the subtropical jet strengthens, and that's when long-haul CAT is most likely. Peak turbulence window: Monsoon months (varies by hemisphere). Typically calmest: Dry season.
Does the terrain around Santiago affect turbulence?
Yes — the Andes lie close enough to generate mountain-wave turbulence on days with strong upper-level winds. These waves can propagate hundreds of kilometres downwind, so they sometimes affect cruise even after you've left the immediate area.
How accurate are Turbcast forecasts?
We combine live NOAA Aviation Weather Center data (PIREPs, SIGMETs, AIRMETs) with physics-based Ellrod and Richardson-number calculations derived from Open-Meteo pressure-level wind and temperature data. If a source is unavailable for a waypoint we show an em dash rather than invent a number.
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