VZ830 turbulence forecast
Thai Vietjet · Bangkok (BKK) to Narita (NRT)
Next departure at its usual time · Tue 6 Oct, 23:35 Bangkok time
This date's schedule isn't confirmed yet. This is the air VZ830 flies through if it leaves at its usual time.
Mostly smooth. About 15 minutes of light bumps on descent. Barely moves your drink.
- Bumpiest stretch
- Light
- Flight time
- 6h 20m
- Cruise altitude
- 35,000 ft
- Weather models
- 3 blended
- Model agreement
- High
Bumpiness along the flight
Takeoff on the left, landing on the right. The higher the line, the bumpier the air the forecast expects at that moment.
Where, and why
The flight split into stretches: how bumpy each is forecast to be, and what causes it.
Cruise0m – 5h 57mSmooth
Nothing significant forecast here.
At cruise the air is thin and cold, and most of it is calm. The bumps up here come from the jet stream, a river of fast wind whose edges stir the air, or from waves set off by mountains far below. This forecast maps exactly where those edges sit.
Descent into Narita5h 57m – 6h 20mLight
Jet-stream wind shear
Where fast air slides over slower air, usually at the edge of the jet stream, the boundary ripples like a flag. It is the most common kind of turbulence and it never comes as a surprise: it is on the crew's charts, and they slow to a set turbulence speed and let the aircraft ride it out.
Coming down means flying back through the low, lively air near the ground: afternoon thermals, gusts around the airport. It is the busiest part of the flight for the crew, and the part they train for most.
Thunderstorms near the route
Around 0m into the flight the forecast has thunderstorms about 30 km from the planned line.
Storms and a calm ride line are not a contradiction. The line follows the planned track at cruise height, above most storm tops, and pilots never fly through a storm: the weather radar in the nose paints every one, and the rule is to give it at least 20 nautical miles (about 37 km) of room. What a storm usually costs you is a few minutes of detour, not bumps.
The closest of these sits inside the 20 nm the crew has to leave, so what it costs is a small turn around it — the line you are looking at is the plan, not the track they will fly.
This forecast changes. FlyBud tells you when.
A new weather model run lands every few hours. Add VZ830 in FlyBud and you get the full turbulence map along your route, a push when the forecast for your flight changes, live tracking and your flight on the lock screen.
Flight status
The latest VZ830 flight on our records, as the airline last reported it.
Last update 4 h ago
Gate changes, delays and the baggage belt, pushed to your phone as they happen.
The aircraft
What VZ830 is flown with, and how it handles bumpy air.
The aircraft for the next VZ830 is assigned closer to departure.
Bigger and heavier aircraft are moved less by the same patch of air, but every airliner is built for far more than turbulence produces.
The airline
Thai Vietjet
Thai Vietjet operates VZ830.
The route
Bangkok (BKK) → Narita (NRT)
- Flight time
- 6h 20m
- Usual departure
- 23:35 local
- Usual arrival
- 07:55 local
What each level feels like
- Smooth
- Calm air. Nothing to notice beyond the hum of the engines.
- Light
- Gentle ripples and the odd dip. Drinks stay put, and walking to the toilet is fine.
- Moderate
- Distinct bumps. A drink might slosh and the belt sign comes on. Uncomfortable, and the aircraft is in full control throughout.
- Severe
- Strong jolts, and loose items can move. Rare, and the reason the belt sign exists: crews slow down and change altitude to get out of it.
How this forecast is made
The planned route is sampled from gate to gate at the altitude the aircraft flies, through 3 independent global weather models, and corrected with turbulence reports radioed in by pilots in the last few hours. Each new model run replaces the forecast; nothing here is a guess from the airline's history.
The independent weather models behind this forecast agree on this ride.
Planned route · timing and conditions may change.
Why the bumps are only bumps
Built for it.
Airliners are tested to loads far beyond anything turbulence produces; the wing flexing you can see is by design.
Seen in advance.
Your crew flies with forecasts like this one, live reports from other pilots and their own weather radar, and they change altitude to stay out of the bumpy air.
The belt is the whole story.
Turbulence injuries almost always involve someone standing or unbuckled. Seated with the belt on, it is a bumpy road and nothing more.
Questions about VZ830
Will VZ830 be bumpy?
For the flight on Tue 6 Oct: Mostly smooth. About 15 minutes of light bumps on descent. Barely moves your drink. The forecast is replaced with every new weather model run, so check back closer to departure.
How long is VZ830?
About 6h 20m gate to gate from Bangkok to Narita.
What time does VZ830 leave?
VZ830 usually departs Bangkok at 23:35 local time and arrives in Narita at 07:55 local time. Times change; the app tracks the live schedule.
Is turbulence dangerous on VZ830?
Turbulence is uncomfortable, not dangerous to the aircraft. Airliners are certified for loads far beyond anything turbulence produces, and crews plan around the bumpy patches with the same kind of forecast as this one. Injuries are almost always to people who were standing or unbuckled, so keep your seatbelt fastened whenever you're seated.
How accurate is this turbulence forecast?
It is a forecast, so it is best within a day or so of departure and improves with every model run. The bumpy patches it finds are usually in the right place, but their timing can shift by a few minutes and the crew may change altitude to avoid them, so the ride you get is often smoother than the forecast.
Fly VZ830 knowing what's ahead
The turbulence forecast for your exact flight, live tracking, delay alerts and arrival weather. Built for people who'd rather know.