Mohammed V International Airport turbulence forecast
Casablanca, Morocco
CMN (Casablanca, Morocco) sits at 33.37°N, 7.59°W, 656 ft elevation — coastal with the Atlas Mountains nearby.
About CMN
Major airport serving Casablanca, Morocco.
- Climate
- Subtropical coastal — mild winters, humid summers
- Nearby terrain
- Atlas Mountains
- Geography
- Coastal — marine-influenced airmass
What to expect on departures
Computed from CMN's geography and climate
The jet stream meanders across this latitude seasonally — CMN sees its strongest CAT exposure in December–February, when the polar jet pushes equatorward and routes intersect it more often. June-onwards departures climb into cleaner upper-level flow. The Atlas Mountains sit upwind of CMN 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 December–February winds at FL300 cross the Atlas Mountains at near-perpendicular angles. Monsoon months pump moisture and instability into the local airmass — expect significantly more convective turbulence during the wet season at CMN, with much smoother cruise during dry-season operations. CMN'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.
Seasonal pattern
Winter (December–February) brings the strongest jet-stream activity — that's when long-haul departures most often log clear-air turbulence at cruise. Summer (June–August) is peak thunderstorm season — convective turbulence is the dominant warm-season risk. Mountain-wave activity near the Atlas Mountains 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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CMN turbulence FAQ
Is turbulence common on flights from CMN?
Mohammed V International Airport is best described as a mountain-wave sensitive airport. The jet stream meanders across this latitude seasonally — CMN sees its strongest CAT exposure in December–February, when the polar jet pushes equatorward and routes intersect it more often.
When is turbulence worst for Casablanca flights?
Winter (December–February) brings the strongest jet-stream activity — that's when long-haul departures most often log clear-air turbulence at cruise. Peak turbulence window: Monsoon months (varies by hemisphere). Typically calmest: Dry season.
Does the terrain around Casablanca affect turbulence?
Yes — the Atlas Mountains 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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