Your Flight
We analysed more than 25,000 data points along your route from John F Kennedy International Airport, New York to Hong Kong International Airport, Hong Kong.
Cathay Pacific
JFK
HKG
CX843
Cathay Pacific
FLIGHT
CX843
JFK
John F Kennedy International Airport
01:45
17 Jan
Now: --:-- ES
15 h 45 m
HKG
Hong Kong International Airport
06:30
18 Jan
Now: --:-- HKS
Altitude: 40,000ft (12.2km)
Distance: 7,003 nm
Duration: 15 h 45 m
ALTITUDE
40,000ft
DISTANCE
7,003 nm
DURATION
15 h 45 m
Times and gates subject to change. Verify with airline.
Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis).
High scores indicate both high probability AND high intensity turbulence.
Smooth
Light
Moderate
Severe
Flight Smoothness Score
9.2
/10
Smoothness
Smooth Flight
71%
Smooth
27%
Light
2%
Moderate
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AI-Powered Flight Briefing
📊 25,000 data points analyzed
HIGH Confidence
Your Journey Beta
12 hours, 14 hours 20 minutes, and 15 hours 35 minutes into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.
Your route takes you over the Appalachian Mountains, crossing the Hudson Bay, crossing the Arctic Ocean, and across the Gobi Desert – these areas can sometimes cause turbulence.
Smooth Flight
We're expecting smooth conditions throughout your flight. You can sit back and relax.
Takeoff
Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 41 knots. These winds may delay arrival by up to 27 minutes.
Landing
Landing should feel a bit bumpy on descent with typical approach conditions.
You're in Safe Hands
If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.
Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our proprietary turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity for precise, real-time forecasting. Learn more
Flight Timeline 15h 45min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Light
1:00-1:30
Smooth
1:30-2:00
Smooth
2:00-2:30
Smooth
2:30-3:00
Smooth
3:00-3:30
Smooth
3:30-4:00
Smooth
4:00-4:30
Smooth
4:30-5:00
Smooth
5:00-5:30
Smooth
5:30-6:00
Smooth
6:00-6:30
Smooth
6:30-7:00
Smooth
7:00-7:30
Smooth
7:30-8:00
Smooth
8:00-8:29
Smooth
8:29-8:58
Smooth
8:58-9:27
Light
9:27-9:56
Smooth
9:56-10:25
Light
10:25-10:54
Light
10:54-11:23
Smooth
11:23-11:52
Light
11:52-12:21
Moderate
12:21-12:50
Light
12:50-13:19
Smooth
13:19-13:48
Light
13:48-14:17
Light
14:17-14:46
Moderate
14:46-15:15
Moderate
Landing
Moderate
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR (scaled)
ZTI Scale
Smooth
<12
<12
Light
12-30
12-30
Moderate
30-45
30-45
Severe
>45
>45
EDR Scale
Smooth
<6
<6
Light
6-24
6-24
Moderate
24-42
24-42
Severe
>42
>42
Airport Weather
Departure
JFK
2°C
(Now)
Broken
•
14 kt
•
VFR — Clear conditions, no delays expected
Arrival
HKG
24°C
(Now)
NSC
•
10 kt
•
VFR — Clear conditions, no delays expected
☀️ Morning Flight
Morning flights typically experience smoother conditions as the atmosphere is more stable and thermal turbulence hasn't yet developed.
Looking for more detailed analysis?
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: We've developed a proprietary
ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their
predictive accuracy. This gives you transparent, passenger-focused turbulence probability instead
of vague categories.
This forecast integrates data from:
- ECMWF Open Data - Global atmospheric model (wind/temperature at 13 flight levels)
- NOAA Aviation Weather Center - Pilot Reports (PIREPs), SIGMETs/AIRMETs, TAFs
- NOAA Space Weather Prediction Center - Aurora forecasts for polar routes
- AviationStack API - Flight schedules and airline operational data
Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.
How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.