KLAX RJTT

Los Angeles International Airport Tokyo Haneda International Airport
Route Information
Departure

KLAX (LAX)

Distance

8,812.4 km (4,758.3 nautical miles)

Arrival

RJTT (HND)

Flight Time

230 minutes (3h 50m)

Flight Profile

Cruise Altitude: 40,000 ft (Flight Level 400)

Route calculated using great circle navigation

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
Comfortable
Noticeable
Uncomfortable
Formula: (Probability × Intensity)
Flight Smoothness Score
8.1 /10
Smoothness
Smooth Flight
29%
Smooth
69%
Light
3%
Moderate
AI-Powered Flight Briefing
📊 17,000 data points analyzed
Advanced AI-Powered Flight Briefing
Your Flight

We analysed more than 17,000 data points along your route from Los Angeles International Airport, Los Angeles to Tokyo Haneda International Airport, Tokyo.

Your Journey Beta

1 hour, 1 hour, and 1 hour 45 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 Sierra Nevada and crossing the North Pacific Ocean – these areas can sometimes cause light 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 87 knots. These winds may delay arrival by up to 111 minutes.

Landing

Landing should feel smooth 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
Live data from ECMWF global forecast models • 12 atmospheric pressure levels analyzed • Updated every 6 hours
Most Common
LIGHT
69% of your flight
Peak Intensity
MODERATE
Brief sections only
Route Breakdown (178 zones)
Moderate
5 zones (3%)
Light
122 zones (69%)
Smooth
51 zones (29%)
Forecast Valid: Oct 15, 12:00 UTC (Generated: Oct 15, 12:00 UTC)
Flight Timeline 3h 50min
Maximum turbulence expected per segment
Takeoff
Light
0:20-0:48
Light
0:48-1:15
Moderate
1:15-1:42
Light
1:42-2:09
Moderate
2:09-2:36
Moderate
2:36-3:03
Light
3:03-3:30
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR
Comparing Two Turbulence Metrics:
  • ZTI (ZeroTurb Index): Our proprietary composite metric (0.0-1.0 scale)
  • EDR (Eddy Dissipation Rate): ICAO/WMO official standard (m^(2/3)/s scale)
ZTI Scale (Custom)
Smooth
<0.2
Light
0.2-0.5
Moderate
0.5-0.75
Severe
>0.75
EDR Scale (ICAO)
Smooth
<0.1
Light
0.1-0.4
Moderate
0.4-0.7
Severe
>0.7

Detailed Analysis Below: While flights generally follow these patterns, our forecast combines ECMWF and NOAA weather data, atmospheric conditions, and pilot reports to build a route-specific picture, updated every 6 hours. Review the detailed metrics and interactive maps below for a comprehensive understanding of expected conditions along your flight path.

Wide-Body Aircraft (Large)

Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.

Safety First: All commercial aircraft, regardless of size, are engineered and certified to safely handle turbulence. The difference is primarily in passenger comfort - larger aircraft provide a smoother feeling ride, but all aircraft are equally safe.

Important: Aircraft information is based on historical flight data and may not reflect the current assignment. Airlines may change aircraft types based on operational needs. Always verify with your airline for the most current aircraft information.
Learn more about aircraft size and comfort
Technical Forecast Details Advanced Analysis

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Comprehensive Flight Profile Altitude • Wind • Turbulence

Flight Altitude Profile
  • X-axis: Distance along route (km)
  • Y-axis (left): Aircraft altitude (feet)
  • Blue = Climb phase
  • Green = Cruise phase
  • Orange = Descent phase
Pilot Reports (PIREPs)

Real turbulence reports from pilots who recently flew near your route:

  • Green = Smooth (no turbulence)
  • Yellow = Light turbulence
  • Orange = Moderate turbulence
  • Red = Severe turbulence
Wind Speed
  • Y-axis (right): Wind speed in knots
  • Sudden wind changes often indicate turbulence
  • Hover over points to see wind direction
AI Comfort Forecast
  • Y-axis (right): Comfort Score (0-70)
  • <1 = Smooth (cyan)
  • 1-25 = Light (green)
  • 25-50 = Moderate (orange)
  • >50 = Severe (red)
Tip: Look for areas where multiple indicators coincide (e.g., pilot reports + AI forecast + wind changes) to identify the most likely turbulence zones.
Global Winds Forecast ECMWF Open Data Worldwide Coverage
Route-Specific Forecast: Wind data calculated at 178 waypoints along your flight path using high-resolution ECMWF global weather model (0.25° grid, ~25km resolution).
Minimum Winds
31 kt
35 mph
Average Winds
87 kt
100 mph
Maximum Winds
131 kt
151 mph
Valid: Oct 15, 15:00 UTC
Source: European Centre for Medium-Range Weather Forecasts
Flight Planning: Headwinds increase flight time and fuel consumption. Tailwinds decrease both. Strong crosswinds may affect takeoff/landing at airports.
Wind Impact Analysis FAIR
Wind Assessment: Moderate headwinds (67 kt avg) will moderately increase flight time. This is typical for this route.
Route Wind Breakdown
Headwinds
128 zones (72%)
Crosswinds
49 zones (28%)
Strong headwinds averaging 67 kt - longer flight time expected
Flight Time Impact
67 kt
Avg Headwind
+111 min
Time Impact
Slower than normal
Wind Range:
• Max Tailwind: 0 kt
• Max Headwind: 127 kt
• Max Crosswind: 123 kt
Wind Speed Along Route ECMWF Forecast
ZeroTurb Index (ZTI) Analysis Custom Algorithm
What is ZTI? Our proprietary ZeroTurb Index combines three meteorological indicators to give you a comprehensive turbulence probability (0.0-1.0 scale). The chart below shows how each component contributes to the overall ZTI along your route:
  • Richardson Number (Ri): Atmospheric stability - lower values indicate CAT risk
  • Wind Shear Index (WSI): Rate of wind speed/direction changes
  • Temperature Gradient Index (TGI): Frontal boundary strength
  • ZTI (Composite): Proprietary composite of the three indices above
ZTI Thresholds: Smooth: 0.0-0.2 Light: 0.2-0.5 Moderate: 0.5-0.75 Severe: 0.75-1.0
Scientific GTG Analysis NOAA Standards
For Aviation Professionals: This section shows turbulence zones using conservative NOAA GTG thresholds. These scientific thresholds are more cautious than the user-friendly "Comfort View" above, which better represents typical passenger experience.

Note: Modern aircraft are designed to handle moderate turbulence effortlessly. What scientific models classify as "moderate" often goes unnoticed by passengers due to advanced flight control systems and aircraft structural design. Most commercial flights encounter some level of atmospheric turbulence that the aircraft manages automatically.
Zone Distribution (Scientific Thresholds)
10%
Smooth (<15%)
17 zones
9%
Light (15-30%)
16 zones
81%
Moderate (30-50%)
144 zones
1%
Severe (≥50% prob)
1 zones
Threshold Comparison
Category Comfort View Scientific (NOAA)
Smooth <20% probability <15% probability
Light 20-50% 15-30%
Moderate 50-75% 30-50%
Severe ≥75% ≥50%
Turbulence Probability Along Route GTG Forecast
Low (0-30%)
Light or no turbulence
Medium (30-50%)
Moderate turbulence likely
High (50-70%)
Moderate-severe expected
Extreme (70-100%)
Severe turbulence
Active Turbulence Warnings (AIRSIGMETs) Loading...
Lightning Activity (Last Hour) Low Activity

1

Total Strikes

32 min ago

Latest Strike

Decreased

Activity Level

1 hour

Time Window
Lightning strikes near your route indicate convective activity (thunderstorms). Areas with lightning typically have severe turbulence, icing, hail, and strong winds. Avoid these areas by at least 20 nautical miles.
Pilot Reports (PIREPs) - 1 Reports
What are PIREPs? Pilot Reports (PIREPs) are real-time observations from pilots flying the route. They are direct, first-hand reports of actual conditions aloft.
Time (UTC) Intensity Altitude Aircraft Report
Airport Forecasts (TAF) - Next 24-30 Hours
Departure: KLAX
Valid: Oct 15 12:00 - Oct 16 18:00 UTC
12:00 - 13:00 UTC
Visibility: 6+ SM
Clouds: SKC
FM 13:00 - 19:00 UTC
Wind: 50° at 5 kt
Visibility: 6+ SM
Clouds: SKC
FM 19:00 - 21:00 UTC
Wind: 240° at 6 kt
Visibility: 6+ SM
Clouds: SKC
FM 21:00 - 03:00 UTC
Wind: 260° at 12 kt
Visibility: 6+ SM
Clouds: SKC
FM 03:00 - 13:00 UTC
Wind: 60° at 5 kt
Visibility: 6+ SM
Clouds: SKC
FM 13:00 - 18:00 UTC
Wind: 50° at 5 kt
Visibility: 6+ SM
Clouds: SKC
Raw TAF: 
TAF KLAX 151120Z 1512/1618 VRB03KT P6SM SKC FM151300 05005KT P6SM SKC FM151900 24006KT P6SM SKC FM152100 26012KT P6SM SKC FM160300 06005KT P6SM SKC FM161300 05005KT P6SM SKC
Arrival: RJTT
Forecast Valid: Oct 15 12:00 - Oct 16 18:00 UTC
12:00 - 18:00 UTC
Wind: 80° at 8 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 12:00 - 03:00 UTC
Wind: 350° at 10 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 03:00 - 09:00 UTC
Wind: 160° at 10 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 09:00 - 18:00 UTC
Wind: 350° at 10 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
Raw TAF: 
TAF RJTT 151105Z 1512/1618 08008KT 9999 FEW015 BKN030 BECMG 1512/1514 35010KT BECMG 1603/1606 16010KT BECMG 1609/1612 35010KT
About TAF: Terminal Area Forecasts (TAF) provide detailed 24-30 hour weather forecasts for airports, including wind, visibility, cloud ceiling, and weather phenomena. Updated every 6 hours by NOAA Aviation Weather Center.
Current Airport Weather (METAR)
Departure: KLAX
Temperature: 19°C (66°F) | Dewpoint: 4°C
Wind: 0° at 0 kt
Sky: CLR
Flight Category: VFR
Altimeter: 1017.00 inHg (1017 mb)
Observed: Oct 15 14:53 UTC
Raw METAR: 
METAR KLAX 151453Z 00000KT 10SM CLR 19/04 A3003 RMK AO2 SLP166 T01890044 53005 $
Arrival: RJTT
Temperature: 20°C (68°F) | Dewpoint: 16°C
Wind: 350° at 6 kt
Sky: FEW3000 BKN4500 (Base: 3000 ft)
Flight Category: VFR
Altimeter: 1020.00 inHg
Observed: Oct 15 15:00 UTC
Raw METAR: 
METAR RJTT 151500Z 35006KT 9999 FEW030 BKN045 20/16 Q1020 NOSIG
About METAR: Meteorological Aerodrome Reports (METAR) provide current weather observations from airports, including temperature, wind, visibility, clouds, and atmospheric pressure. Updated hourly by NOAA Aviation Weather Center. Flight Categories: VFR (Good), MVFR (Marginal), IFR (Instrument Flight Rules), LIFR (Low Instrument Flight Rules).
Route Segment Analysis

The route has been divided into segments of approximately 500km each for detailed analysis.

Route Map With GTG Forecast Overlay
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: Unlike generic turbulence forecasts, 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 (0.0-1.0 scale) instead of vague categories. Our approach processes raw ECMWF atmospheric data through custom calculations to detect Clear-Air Turbulence (CAT), wind shear zones, and frontal boundaries that cause bumpy rides.

This forecast integrates data from:

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.

Flight Insights & Recommendations

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